SOM-RK3399

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1 Introduction

Front

Back

Overview

• The SOM-RK3399 is a 260-pin high performance ARM module designed and developed by FriendlyElec. It is based on Rockchip’s 64-bit hexa-core RK3399 SoC. The regular version has 2GB DDR3 RAM, 16GB Flash, onboard 2x2 MIMO dual-antenna WiFi module. Its dimension is 69.6 x 50 mm. It has a TypeC power port and USB-C display port, and can work by itself without a carrier board.

• The SOM-RK3399 module has various interfaces and ports. It can drive a 4-channel NVMe high speed SSD hard disk by working with a carrier board and the read/write rate can reach up to 1GB/s. It can drive dual-MIPI WDR cameras. It has an eDP interface, MIPI interface, USB 3.0, two USB 2.0 interfaces and other interfaces such as I2C, I2S, SPI, PWM, GPIO, serial and etc.

• The SOM-RK3399 can run popular OS systems such as Android 8.1, Ubuntu 18.04, Armbian and Buildroot smoothly. It has well established software support. Especially it has NN SDK packages for neural networks in Android 8.1, VPU hardware encoding/decoding in Qt-5.10, and GPU graphic acceleration. It supports development of dynamic GUI with Qt Quick. It is a perfect platform for startups to develop applications and prototypes in facial detection, machine vision, VR, autonomous-driving, deep learning, AI and etc.

2 Hardware Spec

• SoC: Rockchip RK3399
  • CPU: big.LITTLE，Dual-Core Cortex-A72(up to 2.0GHz) + Quad-Core Cortex-A53(up to 1.5GHz)
  • GPU: Mali-T864 GPU，supports OpenGL ES1.1/2.0/3.0/3.1, OpenCL, DX11, and AFBC
  • VPU: 4K VP9 and 4K 10bits H265/H264 60fps decoding, Dual VOP, etc
• PMU: RK808-D PMIC, cooperated with independent DC/DC, enabling DVFS, software power-down, RTC wake-up, system sleep mode
• RAM: Dual-Channel 2GB DDR3
• Flash: 16GB eMMC 5.1 Flash
• Ethernet: Native Gigabit Ethernet
• Wi-Fi/BT: 802.11a/b/g/n/ac, Bluetooth 4.1, Wi-Fi and Bluetooth combo module, 2x2 MIMO, dual antenna interface
• Video Input: one or two 4-Lane MIPI-CSI, dual ISP, up to 13MPix/s，supports simultaneous input of dual camera data
• Video output
  • HDMI: HDMI 2.0a, supports 4K@60Hz，HDCP 1.4/2.2
  • DP on Type-C: DisplayPort 1.2 Alt Mode on USB Type-C
  • LCD Interface: one eDP 1.3（4-Lane，10.8Gbps）, one or two 4-Lane MIPI-DSI
• USB
  • USB 2.0: 2 independent native USB 2.0 Host
  • USB 3.0: 1 native USB 3.0 Host
  • USB Type-C: Supports USB3.0 Type-C and DisplayPort 1.2 Alt Mode on USB Type-C
• PCIe: PCIe x4, compatible with PCIe 2.1, Dual operation mode;
• SDIO/MMC: 1x SDIO/MMC for SD Card
• GPIOs, I2S, I2C, PWM, UART, SPI, ADCs
  • 2 X 1.8V I2C, 1 x 3V I2C
  • 1 x 3V UART/SPI
  • 2 x PWM
  • 1 x IR-RX
  • 1 x SPDIF_TX
  • 1 x 1.8V I2S,
  • 6 x 1.8V GPIOs, 8 x 3V GPIOs
  • ADC: 3 x 1.8V ADC inputs
• Debug: one Debug UART, 3V level, 1500000bps
• Keys: PowerKey, Reset, Recovery
• LED: 1 x power LED and 1 x GPIO Controlled LED
• Power supply: DC 12V/1A
• PCB: 8 Layer, 50 mm x 69.6 mm, 260 Pin edge connector
• Ambient Operating Temperature: -20℃ to 70℃

3 Diagram, Layout and Dimension

• 260 Pin Spec
  • Socket Type：0.5mm Pitch 260-Pin Standard Type DDR4 SODIMM Socket， refer to https://www.te.com/usa-en/product-2309409-5.html

Top					Bottom
Pin#	Assignment	Pin Type	If Not Use	Description	Pin#	Assignment	Pin Type	If Not Use	Description
1	VCC_IN	Power IN	/	12V Power Input	2	VCC_IN	Power IN	/	12V Power Input
3	VCC_IN	Power IN	/		4	VCC_IN	Power IN	/
5	VCC_IN	Power IN	/		6	VCC_IN	Power IN	/
7	VCC_IN	Power IN	/		8	VCC_IN	Power IN	/
9	GND	Power	/	System Ground(0V)	10	GND	Power	/	System Ground(0V)
11	GND	Power	/		12	GND	Power	/
13	VCC5V0_SYS	Power OUT	float	5V Power Output，2A max. Auto on when system power on, and off when system power off.	14	PWR_KEY	In	float	System Power Key signal, active low, internal pulled up to 3.3V with 10K
15	VCC5V0_SYS	Power OUT	float		16	VDC_ONOFF	In	float	Power On Mode Select, float for Auto Start，short to GND for PowerKey Mode
17	VCC5V0_SYS	Power OUT	float		18	RTC_BATT_IN	Power IN	float	RTC backup battery（3V）input，backup current is 25uA
19	VCC5V0_SYS	Power OUT	float		20	RECOVERY	In	float	System RECOVERY Key signal，acticve low
21	VCC3V3_SYS	Power OUT	float	3.3V Power Output，1A max. Auto on when system power on, and off when system power off.	22	RESET_IN_H	In	float	RESET signal， acticve hight
23	VCC3V3_SYS	Power OUT	float		24	GND	Power	/	System Ground(0V)
25	VCC3V3_SYS	Power OUT	float		26	ADC_IN0	In	float	0V to 1.8V inputs of RK3399 SoC ADC
27	VCC3V3_SYS	Power OUT	float		28	ADC_IN2	In	float
29	VCC_1V8	Power OUT	float	1.8V Power Output，200mA max. Auto on when system power on, and off when system power off.	30	ADC_IN3	In	float
31	VCC_1V8	Power OUT	float		32	GND	Power	/	System Ground(0V)
33	VCC3V3_S3	Power OUT	float	3.3V Power Output，100mA max. Auto on when system power on, and off when system sleep or power off.	34	GPIO1_A0	In/Out	float	3V GPIO. Linux GPIO 32
35	GND	Power	/	System Ground(0V)	36	GPIO1_A1	In/Out	float	3V GPIO. Linux GPIO 33
37	GPIO0_A2	In/Out	float	1.8V GPIO. Linux GPIO 2	38	GPIO1_A3	In/Out	float	3V GPIO. Linux GPIO 35
39	GPIO2_A2	In/Out	float	1.8V GPIO. Linux GPIO 2	40	GPIO1_A4	In/Out	float	3V GPIO. Linux GPIO 36
41	GPIO2_A3	In/Out	float	1.8V GPIO. Linux GPIO 67	42	GPIO1_C2	In/Out	float	3V GPIO . Linux GPIO 50
43	GPIO2_A4	In/Out	float	1.8V GPIO. Linux GPIO 68	44	GPIO1_C6	In/Out	float	3V GPIO. Linux GPIO 54
45	GPIO2_A5	In/Out	float	1.8V GPIO. Linux GPIO 69	46	GPIO1_C7	In/Out	float	3V GPIO . Linux GPIO 55
47	GPIO2_A6	In/Out	float	1.8V GPIO. Linux GPIO 70	48	GPIO1_D0	In/Out	float	3V GPIO . Linux GPIO 56
49	IR_RX	In	float	Infrared Receiver input, 1.8V level	50	GPIO4_C5/SPDIF_TX	In/Out	float	3V GPIO . Linux GPIO 149. or SPDIF Output
51	GND	Power	/	System Ground(0V)	52	UART2DBG_TX	Out	float	Debug UART TX, 1500000bps, 3V level
53	I2C1_SCL	Out	float	I2C1 clock, 1.8V level, open drian with 2.2K pulled internal	54	UART2DBG_RX	In	float	Debug UART RX, 1500000bps, 3V level
55	I2C1_SDA	In/Out	float	I2C1 data, 1.8V level, open drian with 2.2K pulled internal	56	SPI1_CSn0	Out	float	SPI1 chip select, 3V level
57	I2C2_SDA	In/Out	float	I2C2 data, 1.8V level, open drian with 2.2K pulled internal	58	SPI1_TXD/UART4_TX	Out	float	SPI1 MOSI, or UART4 TX,3V level
59	I2C2_SCL	Out	float	I2C2 clock, 1.8V level, open drian with 2.2K pulled internal	60	SPI1_RXD/UART4_RX	In	float	SPI1 MISO, or UART4 RX,3V level
61	I2C7_SCL_HDMI	Out	float	I2C7 clock, 1.8V level, for HDMI EDID CLK, open drian with 2.2K pulled internal	62	SPI1_CLK	Out	float	SPI1 Clock, 3V level
63	I2C7_SDA_HDMI	In/Out	float	I2C7 data, 1.8V level, for HDMI EDID DATA, open drian with 2.2K pulled internal	64	GND	Power	/	System Ground(0V)
65	GND	Power	/	System Ground(0V)	66	GPIO4_C1/I2C3_SCL	In/Out	float	I2C3 clock, 3V level，open drian. or GPIO，Linux GPIO 145
67	I2S0_SCLK	Out	float	I2S0 continuous serial clock, 1.8V level	68	GPIO4_C0/I2C3_SDA	In/Out	float	I2C3 data, 3V level，open drian. or GPIO，Linux GPIO 144
69	I2S0_LRCK_RX	Out	float	I2S0 word select for input data, 1.8V level	70	I2C4_TPSCL	Out	float	I2C4 clock，3V level， open drian with 2.2K pulled up，for touch panel
71	I2S0_LRCK_TX	Out	float	I2S0 word select for output data, 1.8V level	72	I2C4_TPSDA	In/Out	float	I2C4 data，3V level， open drian with 2.2K pulled up，for touch panel
73	I2S0_SDI0	In	float	I2S0 serial data, 1.8V level	74	GND	Power	/	System Ground(0V)
75	I2S0_SDI1SDO3	In/out	float	I2S0 serial data, 1.8V level	76	HP_DET_H	In	Pull up to VCC3V3_SYS	headphone insert detect, active hight
77	I2S0_SDI2SDO2	In/out	float	I2S0 serial data, 1.8V level	78	GPIO4_D5_LCD_BL_EN	Out	float	LCD backlight on/off control, active hight, 3V level
79	I2S0_SDI3SDO1	In/out	float	I2S0 serial data, 1.8V level	80	GPIO4_D6_LCD_RST_H	Out	float	LCD reset, active hight, 3V level.
81	I2S0_SDO0	out	float	I2S0 serial data, 1.8V level	82	GPIO1_B5_TP_RST	Out	float	Touch panel reset, active low, 3V level
83	GND	Power	/	System Ground(0V)	84	GPIO1_C4_TP_INT	In	float	Touch panel IRQ, active low, 3V level
85	I2S_CLK	out	float	I2S Mclk for I2S0 and I2S1	86	GND	Power	/	System Ground(0V)
87	GND	Power	/	System Ground(0V)	88	PWM0_BL	Out	float	PWM0 for LCD backlight dimming
89	I2S1_SCLK	Out	float	I2S1 continuous serial clock, 1.8V level	90	GPIO4_C6/PWM1	Out	float	PWM1 for cooling fan control
91	2S1_LRCK_RX	Out	float	I2S1 word select for input data, 1.8V level	92	GND	Power	/	System Ground(0V)
93	I2S1_LRCK_TX	Out	float	I2S1 word select for output data, 1.8V level	94	VCC3V0_SD	Power Out	float	3V power out for SD card.
95	I2S1_SDI0	In	float	I2S0 serial data, 1.8V level	96	GND	Power	/	System Ground(0V)
97	I2S1_SDO0	Out	float	I2S0 serial data, 1.8V level	98	SDMMC0_D0	In/Out	float	SD card Data0
99	MIPI_CSI0_RST	Out	float	Camera Reset for MIPI CSI0, 1.8V level	100	SDMMC0_D1	In/Out	float	SD card Data1
101	MIPI_CSI0_PWN	Out	float	Camera Power Down for MIPI CSI0, 1.8V level	102	SDMMC0_D2	In/Out	float	SD card Data2
103	MIPI_CSI1_RST	Out	float	Camera Reset for MIPI CSI1, 1.8V level	104	SDMMC0_D3	In/Out	float	SD card Data3
105	MIPI_CSI1_PWN	Out	float	Camera Power Down for MIPI CSI1, 1.8V level	106	SDMMC0_CMD	Out	float	SD card CMD
107	VCC1V8_CAM	Power Out	float	Power Out for Camera IO	108	SDMMC0_DET_L	In	float	SD card detect
109	GND	Power	/	System Ground(0V)	110	GND	Power	/	System Ground(0V)
111	GPIO2_B3_CIF_CLKOUTA	Out	float	MCLK for camera sensor	112	SDMMC0_CLK	Out	float	SD card Clock
113	GND	Power	/	System Ground(0V)	114	GND	Power	/	System Ground(0V)
115	MIPI_RX0_D3N	In	float	MIPI CSI0 negative differential data line	116	MIPI_TX1/RX1_D0N	In/Out	float	MIPI CSI1/DSI1 negative differential data line
117	MIPI_RX0_D3P	In	float	MIPI CSI0 positive differential data line	118	MIPI_TX1/RX1_D0P	In/Out	float	MIPI CSI1/DSI1 positive differential data line
119	GND	Power	/	System Ground(0V)	120	GND	Power	/	System Ground(0V)
121	MIPI_RX0_D2N	In	float	MIPI CSI0 negative differential data line	122	MIPI_TX1/RX1_D1N	In/Out	float	MIPI CSI1/DSI1 negative differential data line
123	MIPI_RX0_D2P	In	float	MIPI CSI0 positive differential data line	124	MIPI_TX1/RX1_D1P	In/Out	float	MIPI CSI1/DSI1 positive differential data line
125	GND	Power	/	System Ground(0V)	126	GND	Power	/	System Ground(0V)
127	MIPI_RX0_CLKN	In	float	MIPI CSI0 negative differential clock line	128	MIPI_TX1/RX1_CLKN	In/Out	float	MIPI CSI1/DSI1 negative differential clock line
129	MIPI_RX0_CLKP	In	float	MIPI CSI0 positive differential clock line	130	MIPI_TX1/RX1_CLKP	In/Out	float	MIPI CSI1/DSI1 positive differential clock line
131	GND	Power	/	System Ground(0V)	132	GND	Power	/	System Ground(0V)
133	MIPI_RX0_D1N	In	float	MIPI CSI0 negative differential data line	134	MIPI_TX1/RX1_D2N	In/Out	float	MIPI CSI1/DSI1 negative differential data line
135	MIPI_RX0_D1P	In	float	MIPI CSI0 positive differential data line	136	MIPI_TX1/RX1_D2P	In/Out	float	MIPI CSI1/DSI1 positive differential data line
137	GND	Power	/	System Ground(0V)	138	GND	Power	/	System Ground(0V)
139	MIPI_RX0_D0N	In	float	MIPI CSI0 negative differential data line	140	MIPI_TX1/RX1_D3N	In/Out	float	MIPI CSI1/DSI1 negative differential data line
141	MIPI_RX0_D0P	In	float	MIPI CSI0 positive differential data line	142	MIPI_TX1/RX1_D3P	In/Out	float	MIPI CSI1/DSI1 positive differential data line
143	GND	Power	/	System Ground(0V)	144	GND	Power	/	System Ground(0V)
	Connector Key					Connector Key
145	HDMI_CEC	In/Out	float	HDMI CEC signal, 3V level	146	GND	Power	/	System Ground(0V)
147	HDMI_HPD	In	float	HDMI hot plug	148	MIPI_TX0_D3N	Out	float	MIPI DSI0 negetive differential data line
149	GND	Power	/	System Ground(0V)	150	MIPI_TX0_D3P	Out	float	MIPI DSI0 positive differential data line
151	HDMI_TXCN	Out	float	HDMI differential clock line negative	152	GND	Power	/	System Ground(0V)
153	HDMI_TXCP	Out	float	HDMI differential clock line positive	154	MIPI_TX0_D2N	Out	float	MIPI DSI0 negetive differential data line
155	GND	Power	/	System Ground(0V)	156	MIPI_TX0_D2P	Out	float	MIPI DSI0 positive differential data line
157	HDMI_TX0N	Out	float	HDMI differential data line negative	158	GND	Power	/	System Ground(0V)
159	HDMI_TX0P	Out	float	HDMI differential data line positive	160	MIPI_TX0_CLKN	Out	float	MIPI DSI0 negetive differential clock line
161	GND	Power	/	System Ground(0V)	162	MIPI_TX0_CLKP	Out	float	MIPI DSI0 positive differential clock line
163	HDMI_TX1N	Out	float	HDMI differential data line negative	164	GND	Power	/	System Ground(0V)
165	HDMI_TX1P	Out	float	HDMI differential data line positive	166	MIPI_TX0_D1N	Out	float	MIPI DSI0 negetive differential data line
167	GND	Power	/	System Ground(0V)	168	MIPI_TX0_D1P	Out	float	MIPI DSI0 positive differential data line
169	HDMI_TX2N	Out	float	HDMI differential data line negative	170	GND	Power	/	System Ground(0V)
171	HDMI_TX2P	Out	float	HDMI differential data line positive	172	MIPI_TX0_D0N	Out	float	MIPI DSI0 negetive differential data line
173	GND	Power	/	System Ground(0V)	174	MIPI_TX0_D0P	Out	float	MIPI DSI0 positive differential data line
175	USB3.0/TYPE-C1_DP	In/Out	float	TYPEC1 USB 2.0 data+	176	GND	Power	/	System Ground(0V)
177	USB3.0/TYPE-C1_DM	In/Out	float	TYPEC1 USB 2.0 data-	178	PCIE_RX3_N	In	float	PCIe negative differential data line
179	GND	Power	/	System Ground(0V)	180	PCIE_RX3_P	In	float	PCIe positive differential data line
181	USB3.0/TYPEC1_TX1P	Out	float	TYPEC1 USB3.0 PHY0 SuperSpeed TX1P	182	GND	Power	/	System Ground(0V)
183	USB3.0/TYPEC1_TX1M	Out	float	TYPEC1 USB3.0 PHY0 SuperSpeed TX1M	184	PCIE_TX3N	Out	float	PCIe negative differential data line
185	GND	Power	/	System Ground(0V)	186	PCIE_TX3P	Out	float	PCIe positive differential data line
187	USB3.0/TYPEC1_RX1P	In	float	TYPEC1 USB3.0 PHY0 SuperSpeed RX1P	188	GND	Power	/	System Ground(0V)
189	USB3.0/TYPEC1_RX1M	In	float	TYPEC1 USB3.0 PHY0 SuperSpeed RX1M	190	PCIE_RX2_N	In	float	PCIe negative differential data line
191	GND	Power	/	System Ground(0V)	192	PCIE_RX2_P	In	float	PCIe positive differential data line
193	TYPEC1_TX2P	Out	float	TYPEC1 USB3.0 PHY0 SuperSpeed TX2P	194	GND	Power	/	System Ground(0V)
195	TYPEC1_TX2M	Out	float	TYPEC1 USB3.0 PHY0 SuperSpeed TX2M	196	PCIE_TX2N	Out	float	PCIe negative differential data line
197	GND	Power	/	System Ground(0V)	198	PCIE_TX2P	Out	float	PCIe positive differential data line
199	TYPEC1_RX2P	In	float	TYPEC1 USB3.0 PHY0 SuperSpeed RX2P	200	GND	Power	/	System Ground(0V)
201	TYPEC1_RX2M	In	float	TYPEC1 USB3.0 PHY0 SuperSpeed RX2M	202	PCIE_RX1_N	In	float	PCIe negative differential data line
203	GND	Power	/	System Ground(0V)	204	PCIE_RX1_P	In	float	PCIe positive differential data line
205	TYPEC1_SBU1	In/Out	float	TYPEC1 SBU1	206	GND	Power	/	System Ground(0V)
207	TYPEC1_SBU2	In/Out	float	TYPEC1 SBU2	208	PCIE_TX1N	Out	float	PCIe negative differential data line
209	GND	Power	/	System Ground(0V)	210	PCIE_TX1P	Out	float	PCIe positive differential data line
211	TYPEC1_SBU1_DC	Out	float	TYPEC1 SBU1 DC Bias	212	GND	Power	/	System Ground(0V)
213	TYPEC1_SBU2_DC	Out	float	TYPEC1 SBU2 DC Bias	214	PCIE_RX0_N	In	float	PCIe negative differential data line
215	TYPEC1_U2VBUSDET	In	float	TYPEC1 Vbus detect	216	PCIE_RX0_P	In	float	PCIe positive differential data line
217	GND	Power	/	System Ground(0V)	218	GND	Power	/	System Ground(0V)
219	HOST0_DP	In/Out	float	USB 2.0 Host0 data+	220	PCIE_TX0N	Out	float	PCIe negative differential data line
221	HOST0_DM	In/Out	float	USB 2.0 Host0 data-	222	PCIE_TX0P	Out	float	PCIe positive differential data line
223	GND	Power	/	System Ground(0V)	224	GND	Power	/	System Ground(0V)
225	HOST1_DP	In/Out	float	USB 2.0 Host1 data+	226	PCIE_REF_CLKN	Out	float	PCIe negative differential reference clock line
227	HOST1_DM	In/Out	float	USB 2.0 Host1 data-	228	PCIE_REF_CLKP	Out	float	PCIe positive differential reference clock line
229	GND	Power	/	System Ground(0V)	230	GND	Power	/	System Ground(0V)
231	EDP_TX3N	Out	float	eDP data line negative	232	LAN_LED0_BLINK	Out	float	10/100/1000M Ethernet Status LED0
233	EDP_TX3P	Out	float	eDP data line positive	234	LAN_LED1_LINK	Out	float	10/100/1000M Ethernet Status LED1
235	GND	Power	/	System Ground(0V)	236	GND	Power	/	System Ground(0V)
237	EDP_TX2N	Out	float	eDP data line negative	238	MDI3-	In/Out	float	10/100/1000M Ethernet MDI3-
239	EDP_TX2P	Out	float	eDP data line positive	240	MDI3+	In/Out	float	10/100/1000M Ethernet MDI3+
241	GND	Power	/	System Ground(0V)	242	GND	Power	/	System Ground(0V)
243	EDP_TX1N	Out	float	eDP data line negative	244	MDI2-	In/Out	float	10/100/1000M Ethernet MDI2-
245	EDP_TX1P	Out	float	eDP data line positive	246	MDI2+	In/Out	float	10/100/1000M Ethernet MDI2+
247	GND	Power	/	System Ground(0V)	248	GND	Power	/	System Ground(0V)
249	EDP_TX0N	Out	float	eDP data line negative	250	MDI1-	In/Out	float	10/100/1000M Ethernet MDI1-
251	EDP_TX0P	Out	float	eDP data line positive	252	MDI1+	In/Out	float	10/100/1000M Ethernet MDI1+
253	GND	Power	/	System Ground(0V)	254	GND	Power	/	System Ground(0V)
255	EDP_AUXP	In/Out	float	eDP AUX line positive	256	MDI0-	In/Out	float	10/100/1000M Ethernet MDI0-
257	EDP_AUXN	In/Out	float	eDP AUX line negative	258	MDI0+	In/Out	float	10/100/1000M Ethernet MDI0+
259	GND	Power	/	System Ground(0V)	260	GND	Power	/	System Ground(0V)

4 Carrier Board

• SOM-RK3399 Dev Kit

5 Get Started

5.1 Essentials You Need

Before starting to use your SOM-RK3399 get the following items ready

• SOM-RK3399
• Type-C cable
• TF Card: Class 10 or Above, minimum 8GB SDHC
• USB to serial adapter(optinal, for debugging or access from PC host)
• A DC 12V/2A power is a must
• HDMI monitor or LCD
• USB keyboard, mouse and possible a USB hub(or a TTL to serial board)
• A host computer running Ubuntu 18.04 64-bit system

5.2 Install OS

5.2.1 Downloads

5.2.1.1 Official image

Visit download link to download official image files (in the "01_Official images" directory).
The table below lists all official images, the word 'XYZ' in image filename meaning:

• sd: Use it when you need to boot the entire OS from the SD card
• eflasher: Use it when you need to flash the OS to eMMC via TF card
• usb: Use it when you need to flash the OS to eMMC via USB

Icon	Image Filename	Version	Description	Kernel Version
	rk3399-XYZ-android10-YYYYMMDD.img.zip	10	Android 10	4.4.y
	rk3399-XYZ-android8-YYYYMMDD.img.zip	8.1	Android 8.1	4.4.y
	rk3399-XYZ-android7-YYYYMMDD.img.zip	7.1.2	Android 7.1.2	4.4.y
	rk3399-XYZ-debian-bullseye-minimal-4.19-arm64-YYYYMMDD.img.gz	bullseye	Debian 11 Desktop, LXDE desktop, no pre-installed recommended software, supports hardware acceleration	4.19.y
	rk3399-XYZ-debian-bullseye-desktop-4.19-arm64-YYYYMMDD.img.gz	bullseye	Debian 11 Desktop, LXDE desktop, pre-installed mpv, smplayer and chromium brower, supports hardware acceleration	4.19.y
	rk3399-XYZ-debian-bookworm-core-4.19-arm64-YYYYMMDD.img.gz	bullseye	Debian 12 Core, No desktop environment, command line only	4.19.y
	rk3399-XYZ-ubuntu-focal-desktop-4.19-arm64-YYYYMMDD.img.gz	focal	Ubuntu 20.04 Desktop, LXQT desktop, pre-installed mpv, smplayer and chromium brower, supports hardware acceleration	4.19.y
	rk3399-XYZ-friendlydesktop-bionic-4.4-arm64-YYYYMMDD.img.zip	bionic	64-bit FriendlyDesktop image file based on Ubuntu desktop 18.04 64bit	4.4.y
	rk3399-XYZ-friendlycore-focal-4.19-arm64-YYYYMMDD.img.gz	focal	64-bit FriendlyCore image file(Qt 5.10.0) based on Ubuntu core 20.04 64bit	4.19.y
	rk3399-XYZ-friendlycore-bionic-4.4-arm64-YYYYMMDD.img.gz	bionic	64-bit FriendlyCore image file(Qt 5.10.0) based on Ubuntu core 18.04 64bit	4.4.y
	rk3399-XYZ-lubuntu-desktop-xenial-4.4-armhf-YYYYMMDD.img.zip	xenial	Lubuntu Desktop(with Qt 5.10.0)	4.4.y
	rk3399-XYZ-ubuntu-noble-core-4.19-arm64-YYYYMMDD.img.gz	noble	64-bit Ubuntu Lite image file based on Ubuntu core 24.04 64bit	4.19.y
	rk3399-XYZ-openmediavault-6.1-YYYYMMDD.img.gz	Shaitan	OpenMediaVault NAS system, base on Debian 12	6.1.y
	rk3399-XYZ-buildroot-4.19-arm64-YYYYMMDD.img.gz	--	Buildroot image file with Qt5-wayland (base on Rockchip Linux SDK)	4.19.y
	rk3399-XYZ-friendlywrt-21.02-YYYYMMDD.img.gz	21.02	FriendlyWrt, based on OpenWrt 21.02	6.1.y
	rk3399-XYZ-friendlywrt-21.02-docker-YYYYMMDD.img.gz	21.02	FriendlyWrt with Docker, based on OpenWrt 21.02	6.1.y
	rk3399-XYZ-friendlywrt-23.05-YYYYMMDD.img.gz	23.05	FriendlyWrt, based on OpenWrt 23.05	6.1.y
	rk3399-XYZ-friendlywrt-23.05-docker-YYYYMMDD.img.gz	23.05	FriendlyWrt with Docker, based on OpenWrt 23.05	6.1.y
Other Image
	Github Actions - FriendlyWrt	21.02,23.05	FriendlyWrt	6.1.y
	rk3399-XYZ-multiple-os-YYYYMMDD-25g.img.gz	-	It contains multiple OS image files, making it convenient for testing different operating systems, this image disables automatic flashing at startup; you will need to manually select the OS to flash.

5.2.1.2 Tools (optional)

Visit download link to download tools (in the "05_Tools" directory).

Filename	Description
win32diskimager.rar	This program is designed to write a raw disk image to a removable device or backup a removable device to a raw image file
SD Card Formatter	A program (application) that allows easy and quick clear the SD card
RKDevTool_Release_v2.84.zip	Rockchip flashing tool, for USB upgrade

5.2.2 Flashing the OS to the microSD card

Follow the steps below:

• Get an 8G microSD card;
• Visit download linkto download image files (in the "01_Official images/01_SD card images" directory);
• Download the win32diskimager tool (in the "05_Tools" directory), or use your preferred tool;
• Extract the .gz format compressed file to get the .img format image file;
• Run the win32diskimager utility under Windows as administrator. On the utility's main window select your SD card's drive, the wanted image file and click on "write" to start flashing the SD card.
• Take out the SD and insert it to SOM-RK3399's microSD card slot;
• Power on SOM-RK3399 and it will be booted from your TF card, some models may require pressing the Power button to start;

5.2.3 Install OS to eMMC

5.2.3.1 Option 1: Install OS via TF Card

This method firstly boots a mini Linux from a TF card and then automatically runs an EFlasher utility to install the OS to eMMC. You can connect your system to an HDMI monitor and watch its progress.
This is optional. You can watch its progress by observing its LEDs as well:

By default, flashing starts automatically upon power-up, so be sure to back up the data in eMMC. If you don't want it to start automatically, you can use image file with a filename containing the words 'multiple-os' and manually select the OS you want to flash on the interface.

5.2.3.1.1 Flash Official OS to eMMC

Follow the steps below:

• Get an SDHC card with a minimum capacity of 8G
• Visit download linkto download image files (in the "01_Official images/02_SD-to-eMMC images" directory) and win32diskimager tool (in the "05_Tools" directory);
• Extract the .gz format compressed file to get the .img format image file;
• Run the win32diskimager utility under Windows as administrator. On the utility's main window select your SD card's drive, the wanted image file and click on "write" to start flashing the SD card.
• Eject your SD card and insert it to SOM-RK3399’s microSD card slot.
• Turn on SOM-RK3399, it will boot from the SD card and automatically run EFlasher to install the OS to the board’s eMMC.
• After flashing is complete, eject the SD card from SOM-RK3399, SOM-RK3399 will automatically reboot and boot from eMMC.

5.2.3.1.2 Flash third party OS (Image file) to eMMC

• Auto Install (Default Behavior)

1) Download an “eflasher” firmware from network drive(in the "01_Official images/02_SD-to-eMMC images" directory), extract it and install it to a TF card ;
2) Eject and insert the TF card to your PC, after a “FriendlyARM” device shows up(Under Linux, it is a “FriendlyARM” directory), copy the image file ending with .raw or .gz into the directory (Note: if your file is in .img format, please rename it to .raw format).
3) Open the eflasher.conf file on the TF card, set “autoStart=” to the name of your image file, such as:

autoStart=openwrt-rockchip-armv8_nanopi-ext4-sysupgrade.img.gz

In addition to third-party image, official image files which with the '-sd-' word in the filename are also supported, for example: rk3NNN-sd-friendlywrt-21.02-YYYYMMDD.img.gz
4) Eject the TF card, insert the TF card to SOM-RK3399, power it on it will automatically install your firmware. You can watch the installation progress by observing the LEDs’ status.

5.2.3.2 Option 2: Install OS on Web Page

Get a TF card which has been installed with FriendlyWrt, log in FriendlyWrt on the web page, click on “System” ->”eMMC Tools”. Click on “Select file” to select your wanted image file, either an official image (filename containing '-sd-') or a third party image. The file should be a “.gz” or “.img” file.
After a file is selected, click on “Upload and Write” to start installing an OS.

After installation is done, eject the SD card, the system will automatically reboot and load the OS from eMMC. After the OS begins to load, if the system LED is flashing and the network LED is on, it means the the OS has loaded successfully. If the OS is FriendlyWrt, you can click on “Go to Homepage” to enter the homepage.
For official OS, you need select the file with the filename containing '-sd-', for example: rk3NNN-sd-friendlywrt-21.02-YYYYMMDD.img.gz, the compression file only supports the .gz format. If the file is too large, you can compress it into .gz format before uploading.

5.2.3.3 Option 3: Install OS via USB

5.2.3.3.1 Step 1: Install USB Driver and Tools/Utilities

Download a driver file DriverAssitant_v5.12.zip under the “tools” directory from network drive, extract and install it.
Under the same directory, download a utility RKDevTool_Release_v2.84.zip and extract it.

5.2.3.3.2 Step 2: Connect SOM-RK3399 to PC and Enter Installation Mode

Press and hold the "Recover" key, Use a USB C-to-A cable, connect SOM-RK3399 to a PC，After the status LED has been on for at least 3 seconds, release the "Recover" key;

5.2.3.3.3 Step 3: Install image to eMMC

A firmware in general is packaged in either of the two options: the first is an whole image (ie, update.img) which is often offered by third party developers, the second is that an image is packaged and placed in multiple partition images. FriendlyElec offers an image in the latter option.

• Option 1: Install whole image (ie, update.img)
  

On a PC which has the extracted RKDevTool_Release_v2.84 utility, go to the RKDevTool_Release_v2.84 directory, run the RKDevTool.exe file. If everything works, you will see a “Found a new Maskrom device” message on the utility;
Go to “Upgrade Firmware(升级固件)”, click on “Firmware(固件)”, select your wanted image file, and click on “Upgrade(升级)” to install. After installation is done, your board will reboot automatically and load the system from eMMC;

• Option 2: Install OS that is packaged & placed in multiple partition images
  

Go to network drive to download your needed package and extract it (in the "01_Official images/03_USB upgrade images). After it is extracted, you will see some utilities and a configuration file under the directory. double click on RKDevTool.exe, you will see a “Found a new Maskrom device” message on the utility. Click on the “Execute”, wait a moment and it will be installed. After installation is done your system will automatically reboot and load the system from eMMC.

5.3 The Boot order between eMMC and SD card

By default, the system will be booted from the TF card first, but this is not the case under all conditions. This section will explain all situations in detail;

Refer to rockchip official document [1], there are two types of loader program:
1) U-Boot TPL/SPL (i.e. upsream U-Boot, also called mainline U-Boot)
2) Rockchip MiniLoader

Things to note:
1) FriendlyELEC's image uses Rockchip MiniLoader
2) The third-party image usually uses U-Boot TPL/SPL

The following situations will always start from eMMC:
If the system in the eMMC, or the system in the TF card uses the first Loader type U-Boot TPL/SPL, it will always boot from the eMMC;
If you want to boot from the TF card, there are the following methods:
Method 1: Clear the Loader on the eMMC, the clearing method is as follows, after starting from the eMMC, enter the following command on the command line to clear the Loader on the eMMC:

dd if=/dev/zero of=/dev/mmcblk2 bs=8M count=1

Method 2: Insert the TF card, Press Maskrom Key (or short-circuit the Maskrom contacts) and then power on (need to keep the short-circuit for about 3 seconds), it will start from the TF card

The summary is as follows:

eMMC current system	TF card current system	Boot priority
No system	Any image	TF card
FriendlyELEC's image	FriendlyELEC's image	TF card
FriendlyELEC's image	Image with Mainline U-boot	eMMC
Image with Mainline U-boot	FriendlyELEC's image	eMMC
Image with Mainline U-boot	Image with Mainline U-boot	eMMC

6 Access hardware

6.1 Access Serial Interface

For now only UART4 is available for users:

Serial Interface	Serial Device
UART0	Used by Bluetooth
UART1	Used by Gbps Ethernet
UART2	Used by Serial Debug Port
UART3	Used by Gbps Ethernet
UART4	Available, device name is /dev/ttyS4 (note: this is only applicable for ROM released after 20180618)

7 Work with Debian11 Desktop

7.1 Introduction to Debian11 Desktop

Debian11 Desktop is a light-weighted debian desktop system，it has the following features：

• Uses LXDE as default desktop;
  
• Mali GPU-based OpenGL support;
  
• Support Rockhip MPP video hard coding and hard decoding;
  
• Pre-installed mpv and smplayer, both support 4K video hardware decoding;
  
• Pre-installed Chromium browser, support vpu/gpu hardware acceleration (video hard decoding limited to h264/mp4 format);
  
• Compatible with Plex Server and Docker;
  

7.2 Account & Password

Regular Account:
    User Name: pi
    Password: pi

Root:
    the root user account is disabled by default, you may configure the root password through the 'sudo passwd root' command.

7.3 View IP address

Since the Debian Bullseye hostname is the hardware model by default, you can use the ping command to get the IP address:ping SOM-RK3399

7.4 Connect to Debian via SSH

Run the following commandssh pi@SOM-RK3399
The default password is: pi

7.5 Update Software Packages

$ sudo apt-get update

7.6 Install x11vnc Server on Debian for Remote Access

7.6.1 Install x11vnc server

The following command to install x11vnc server:

sudo apt-get install x11vnc

7.6.2 Set your password

sudo x11vnc -storepasswd /etc/x11vnc.pwd

7.6.3 Setup x11vnc server with systemd auto start up

Create service configuration file:

sudo vi /lib/systemd/system/x11vnc.service

Let’s copy and paste the following configuration into our newly create service file:

[Unit]
Description=Start x11vnc at startup.
Requires=display-manager.service
After=syslog.target network-online.target
Wants=syslog.target network-online.target
 
[Service]
Type=simple
ExecStart=/usr/bin/x11vnc -display :0 -forever -loop -noxdamage -repeat -rfbauth /etc/x11vnc.pwd -rfbport 5900 -shared -capslock -nomodtweak
ExecStop=/usr/bin/x11vnc -R stop
Restart=on-failure
 
[Install]
WantedBy=multi-user.target

The following commands to reload the systmd system and to enable and start the x11vnc service:

sudo systemctl daemon-reload
sudo systemctl enable x11vnc.service
sudo systemctl start x11vnc

7.6.4 Testing remote access

Start the VNC client software, input IP:5900 to connect:

7.7 Install the kernel-header package

sudo dpkg -i /opt/linux-headers-*.deb

try to compile a kernel module:

sudo apt update
sudo apt install git gcc make bc
git clone https://github.com/RinCat/RTL88x2BU-Linux-Driver.git
cd RTL88x2BU-Linux-Driver
make -j$(nproc)
sudo make install
sudo modprobe 88x2bu

7.8 Change time zone

7.8.1 Check the current time zone

timedatectl

7.8.2 List all available time zones

timedatectl list-timezones

7.8.3 Set the time zone (e.g. Shanghai)

sudo timedatectl set-timezone Asia/Shanghai

7.9 Change startup LOGO and Wallpaper

7.9.1 Change startup LOGO

Replace the following two files in the kernel source code directory and recompile the kernel：
kernel/logo.bmp
kernel/logo_kernel.bmp
Or use the script to operate, as shown below：

• Download scripts:

git clone https://github.com/friendlyarm/sd-fuse_rk3399.git -b kernel-4.19 --single-branch
cd sd-fuse_rk3399

• Compile kernel and repackage firmware

convert files/logo.jpg -type truecolor /tmp/logo.bmp
convert files/logo.jpg -type truecolor /tmp/logo_kernel.bmp
sudo LOGO=/tmp/logo.bmp KERNEL_LOGO=/tmp/logo_kernel.bmp ./build-kernel.sh debian-bullseye-desktop-arm64
sudo ./mk-sd-image.sh debian-bullseye-desktop-arm64
sudo ./mk-emmc-image.sh debian-bullseye-desktop-arm64

Note: If your system is not debian-bullseye-desktop-arm64, please specify according to the actual situation

7.9.2 Change Wallpaper

Modify the following configuration file:

/home/pi/.config/pcmanfm/LXDE/desktop-items-0.conf

7.10 Soft Factory Reset

Execute the following command in a terminal:

sudo firstboot && sudo reboot

7.11 Start the program automatically at startup(For example Kodi)

Put the desktop file in the ~/.config/autostart/ directory, for example：

mkdir ~/.config/autostart/
cp /usr/share/applications/kodi.desktop ~/.config/autostart/

7.12 Disable auto-mounting

sudo systemctl mask udisks2
sudo reboot

7.13 Setup Chinese language and Input method

7.13.1 Setup Chinese language

Enter the following command and select 'zh_CN.UTF-8':

sudo dpkg-reconfigure locales

Add environment variables to .bashrc:

echo "export LC_ALL=zh_CN.UTF-8" >> ~/.bashrc
echo "export LANG=zh_CN.UTF-8" >> ~/.bashrc
echo "export LANGUAGE=zh_CN.UTF-8" >> ~/.bashrc

Reboot device:

sudo reboot

7.13.2 Installing Chinese input method

Enter the following command to install fcitx and Pinyin input method:

sudo apt update
sudo apt-get install fcitx fcitx-pinyin
sudo apt-get install im-config
sudo apt-get install fcitx-table*
sudo apt-get install fcitx-ui-classic fcitx-ui-light
sudo apt-get install fcitx-frontend-gtk2 fcitx-frontend-gtk3 fcitx-frontend-qt4
sudo apt-get remove --purge scim* ibus*
sudo reboot

After reboot, press Ctrl+Space to switch between Chinese and English input methods, and the input method icon will appear in the upper right corner, right-click the input method icon in the upper right corner to switch input methods in the pop-up menu, as shown below:

7.14 Installing Plex Multimedia Server

Visit the Plex website: https://www.plex.tv/media-server-downloads/
On the download page, select the category "Plex Media Server", choose "Linux" for the platform and "Ubuntu(16.04+)/Debian(8+) - ARMv8" for the version,
After downloading the deb package, use the dpkg command to install the package:

sudo dpkg -i plexmediaserver_1.31.0.6654-02189b09f_arm64.deb

After installation, login to the Plex server by typing the following URL into your computer browser: http://IP地址:32400/web/

7.15 Install Docker on Debian

Please refer to: How to Install Docker on Debian

7.16 How to test NPU

Please refer to: NPU

7.17 WiFi Connection

7.17.1 Gui

Click on the icon on the top right in the Debian's main window, select your wanted WiFi hotspot and proceed with prompts

7.17.2 Console

Please visit: Use NetworkManager to configure network settings

7.18 Cancel auto-login

Edit file:

sudo vim /etc/lightdm/lightdm.conf

Comment out the following two lines (insert # in front of them):

autologin-user=pi
autologin-user-timeout=0

7.19 Test OpenGL ES

You can test it by clicking on the Terminator icon to start a commandline utility in the System Tools and run the following commands:

glmark2-es2

7.20 HDMI/DP LCD Resolution

Open the system's menu and go to Perferences -> Monitor Settings to customize your settings.
Recommended resolution: 1920x1080@60Hz

7.21 Adjust HDMI overscan

Open the command line terminal and enter the command to operate, Note:
1) You need to login to the desktop;
2) If you are using ssh terminal, please use the same username as the desktop login. The default is pi. You cannot use the root user. you also need to assign the DISPLAY variable:

export DISPLAY=:0.0

7.21.1 Query which resolutions the display supports

xrandr -q

7.21.2 Set resolution

For example set to 1920X1080@60Hz:

xrandr --output HDMI-1 --mode 1920x1080 --refresh 60

7.21.3 Adjust the HDMI overscan

For example, the transformation scaling horizontal coordinates by 0.8, vertical coordinates by 1.04 and moving the screen by 35 pixels right and 19 pixels down:

xrandr --output HDMI-1 --transform 0.80,0,-35,0,1.04,-19,0,0,1

7.21.4 Automatic adjustment at boot

Edit ~/.config/autostart/lxrandr-autostart.desktop，Write the full xrandr command to the key at the beginning of "Exec= as shown below：

[Desktop Entry]
Type=Application
Name=LXRandR autostart
Comment=Start xrandr with settings done in LXRandR
Exec=sh -c 'xrandr --output HDMI-1 --mode 1920x1080 --refresh 50 --transform 1.04,0,-35,0,1.05,-30,0,0,1'
OnlyShowIn=LXDE

7.22 Chromium web browser

7.22.1 GPU

Chromium web browser has enabled hardware acceleration by default, supports WebGL, and can view hardware acceleration details by entering the URL chrome://gpu, as shown below:

7.22.2 VPU

Play a video in the browser, then use fuser on the command line to view the mpp device node to confirm that the vpu interface is being called:

pi@FriendlyElec:~$ fuser /dev/mpp_service
/dev/mpp_service:     3258

If there is no content output from the fuser command, it means software decoding.

7.23 Test hardware encoding

mpi_enc_test -w 1920 -h 1080 -t 7 -f 0 -o test.h264 -n 300
export XDG_RUNTIME_DIR=/run/user/0
ffplay test.h264

7.23.1 Check Supported Hardware Decoding Formats

Enter about://gpu in your browser's address bar and scroll to the bottom of the page to view the "Video Acceleration Information" table.
After playing a video, enter about://media-internals in your browser's address bar to check if hardware decoding was enabled for the most recent playback.

8 Work with Debian10 Desktop

• Refer to：
  • Debian Buster

9 Work with FriendlyDesktop

Arduino

Firefox

Scratch

FriendlyDesktop is a light-weighted Ubuntu desktop system. It is based on LXDE and has the following features:
    Latest Version － Based on Ubuntu 18.04 64
    Various Development Utilities － It is compatible with FriendlyCore and has integrated an optimized Qt5.10, QtCreator and Arduino IDE.
    Light-weighted － it consumes relatively less CPU resources than a common desktop system. When a system's RAM is sufficient it can achieve much better performance.
    Less Power Consumption － it consumes relatively less power or resources than a common desktop system to achieve the same performance.
    Compact and Neat － its desktop is based on GTK+ 2 and it supports multiple languages.
    Easy to Use － its GUI looks similar to MS Windows'.
    Customizable － Users can customize LXDE's GUI.
    Compatible － it is compatible with freedesktop.org.
FriendlyELEC has optimized support for Mali GPU and VPU in FriendlyDesktop for RK3399 and integrated drivers for X.org. FriendlyDesktop supports Hardware Cursor, OpenGL graphic acceleration, 4K video playing with hardware decoding.

9.1 Account & Password

Regular Account:

   User Name: pi
   Password: pi

Root:

   User Name: root
   Password: fa

9.2 WiFi Connection

Click on the icon on the top right in the FriendlyDesktop's main window, select your wanted WiFi hotspot and proceed with prompts

9.3 HDMI/DP LCD Resolution

Open the system's menu and go to Perferences -> Monitor Settings to customize your settings.
Recommended resolution: 1920x1080@60Hz

9.4 Adjust HDMI overscan

Open the command line terminal and enter the command to operate, Note:
1) You need to login to the desktop;
2) If you are using ssh terminal, please use the same username as the desktop login. The default is pi. You cannot use the root user. you also need to assign the DISPLAY variable:

export DISPLAY=:0.0

9.4.1 Query which resolutions the display supports

xrandr -q

9.4.2 Set resolution

For example set to 1920X1080@60Hz:

xrandr --output HDMI-1 --mode 1920x1080 --refresh 60

9.4.3 Adjust the HDMI overscan

For example, the transformation scaling horizontal coordinates by 0.8, vertical coordinates by 1.04 and moving the screen by 35 pixels right and 19 pixels down:

xrandr --output HDMI-1 --transform 0.80,0,-35,0,1.04,-19,0,0,1

9.4.4 Automatic adjustment at boot

Edit ~/.config/autostart/lxrandr-autostart.desktop，Write the full xrandr command to the key at the beginning of "Exec= as shown below：

[Desktop Entry]
Type=Application
Name=LXRandR autostart
Comment=Start xrandr with settings done in LXRandR
Exec=sh -c 'xrandr --output HDMI-1 --mode 1920x1080 --refresh 50 --transform 1.04,0,-35,0,1.05,-30,0,0,1'
OnlyShowIn=LXDE

9.5 eDP LCD Display Rotation

If you want to rotate an eDP LCD's display you can do it by commanding "xrotate.sh" to rotate its display to 90/180/270 degrees. You can rotate display clockwise by 90 degrees by running the following command as root. This command calls lightdm to make your change effective immediately:

sudo xrotate.sh -m CW -r

For more details about its options you can run "xrotate -h".
Note: this command doesn't support HDMI display's rotation. If you want to rorate an HDMI's display you need to refer to X11's tech documents and make changes in "/etc/X11/xorg.conf".

Note: when you play a video with hardware decoding your player's display window doesn't rotate with your LCD's display

9.6 Test OpenGL ES

You can test it by clicking on the Terminator icon to start a commandline utility in the System Tools and run the following commands:

taskset -c 4-5 glmark2-es2

9.7 4K Video Playing

9.7.1 Play with Qt Player with Hardware Decoding

FriendlyDesktop has integrated a Qt5-VideoPlayer utility. This utility has support for Rockchip's gstreamer plug-in and supports 4K video playing with hardware decoding. You can start it by following the steps below: On FriendlyDesktop's main window open "Sound & Video" and click on "Qt5-VideoPlayer".

On the player's main window click on the bottom left's "Open" button to load a video file and double-click on its name on the file list to start video playing. Here is how it looks like. You can set the display window to full screen and adjust the volume:

Qt5-VideoPlayer source code: https://github.com/friendlyarm/rk-player-qt

9.7.2 Play with Linux Command

You can play it by running the following command in a commandline utility:

gst-player.sh

By default its voice will be output to audio jack. You can locate this script by commanding "which gst-player.sh". You can customize its behavior by making changes in this script.

9.8 Work with USB Camera

Insert the USB camera (such as Logitech C270/C920) into the development board. Double click the "USB Camera" icon on desktop will pop up the luvcview gui (need to use the 2019/05/11+ version firmware).
the luvcview tool is an open source software that you can compile yourself:

git clone https://github.com/ksv1986/luvcview
cd luvcview
make

View the usage of luvcview:

./luvcview -h

Parameter Description:

luvcview version 0.2.1
Usage: uvcview [-h -d -g -f -s -i -c -o -C -S -L -l -r]
-h print this message
-d /dev/videoX use videoX device
-g use read method for grab instead mmap
-w disable SDL hardware accel.
-f video format default jpg others options are yuv jpg
-i fps use specified frame interval
-s widthxheight use specified input size
-c enable raw frame capturing for the first frame
-C enable raw frame stream capturing from the start
-S enable raw stream capturing from the start
-o avifile create avifile, default video.avi
-L query valid video formats
-l query valid controls and settings
-r read and set control settings from luvcview.cfg

To preview USB camera (640x360@30fps), you can use the following command:

./luvcview -d /dev/video8 -i 30 -s 640x360

As you can see from the output of luvcview, hardware acceleration has been turned on:

pi@NanoPC-T4:/etc/xrdp$ luvcview -d /dev/video8 -i 30 -s 640x360
luvcview version 0.2.1
 interval: 30 fps
Hardware acceleration available
video /dev/video8

9.9 File Transfer with Bluetooth

Click on the "Preferences" in the main window's menu to start Bluetooth Manager and click on "Search" to search surrounding Bluetooth devices. Click on your wanted device, pair the device with your board and you will be able to do file transfer, here is how it looks like:

9.10 Install OpenCV

OpenCV has been pre-installed in FriendlyCore/FriendlyDesktop (Version after 201905) and does not require manual installation.
Please refre this link: https://github.com/friendlyarm/install-opencv-on-friendlycore/blob/rk3399/README.md

9.11 Develop Qt Applications

FriendlyDesktop has a Qt 5.10.0 which supports RK3399's OpenGL ES and Gstreamer 1.0 hardware acceleration and a QtCreator IDE which is ready and can be used to compile and run applications. Here is how it looks like:

When running the Qt app, you need to specify the platform parameter to xcb as follows:

./HelloQt --platform xcb

9.12 WiringPi and Python Wrapper

• WiringPi for RK3399
• WiringPi-Python for RK3399

9.13 Switch audio default output device

9.13.1 View the current default output device

On the terminal of the non-root user, enter the following command:

pactl info -vvv

The information displayed contains the following, indicating that the current audio output is directed to the headset:

Default Sink: alsa_output.platform-rt5651-sound.stereo-fallback

The information displayed contains the following, indicating that the current audio output is to HDMI:

Default Sink: alsa_output.platform-hdmi-sound.stereo-fallback

9.13.2 Set headphone jack as the default output device

On the terminal of the non-root user, enter the following command:

pactl set-default-sink  alsa_output.platform-rt5651-sound.stereo-fallback

Set default volume to 20%:

pactl -- set-sink-volume alsa_output.platform-rt5651-sound.stereo-fallback 20%

9.13.3 Set hdmi as the default output device

On the terminal of the non-root user, enter the following command:

pactl set-default-sink  alsa_output.platform-hdmi-sound.stereo-fallback

9.13.4 View settings have taken effect

cat /var/lib/pulse/*-default-sink

9.13.5 Temporary switching during playback

This method is only valid for the current playback process:
Open the menu "Sound & Video" -> "PulseAudio Volume Control", click the "Built-in Audio Stereo" button on the interface to switch between different output devices, such as switching between HDMI and headphone jack.

9.14 Play RTSP video stream (or IP Camera)

Open a command line terminal and enter the following command:

gst-launch-1.0 rtspsrc location="rtsp://admin:12345@192.168.1.120:554/live/main" ! rtph264depay ! decodebin ! rkximagesink

Change the address after rtsp:// to the real address.

9.15 Chromium web browser

Chromium web browser has enabled hardware acceleration by default, supports WebGL, and can view hardware acceleration details by entering the URL chrome://gpu, as shown below:

9.16 Screen saver and auto sleep related settings

The screen saver configuration file is /etc/xdg/autostart/xset_command.desktop. The default factory settings are that the screen saver and DPMS are both closed. You can change the configuration by modifying this file.

9.17 Install Scratch

enter the following command:

sudo apt-get install scratch:arm64

9.18 Install Arduino IDE

enter the following command:

sudo apt-get install arduino:arm64

9.19 Start the program automatically at startup

Put the desktop file in the ~/.config/autostart/ directory, for example：

cp /usr/share/applications/org.qt-project.qtcreator.desktop ~/.config/autostart/

9.20 Login to the desktop as the root user

Edit the /root/.profile file：

sudo vim /root/.profile

Replace with the following:

if [ -n "$BASH_VERSION" ]; then
    if [ -f "$HOME/.bashrc" ]; then
	. "$HOME/.bashrc"
    fi
fi
if [ -d "$HOME/bin" ] ; then
    PATH="$HOME/bin:$PATH"
fi

Run the following command to modify the lightdm configuration file and change the automatically logged-in user name to root:

sudo sed -i 's/autologin-user=pi/autologin-user=root/g' /usr/share/lightdm/lightdm.conf.d/20-defaultsession.conf

Run the reboot command to restart:

sudo reboot

If you want to log in, the desktop icons and configuration are the same as the pi user, you can copy the relevant directory from the /home/pi directory:

sudo rm -rf /root/Desktop /root/Pictures /root/.config
sudo cp -af /home/pi/Desktop /home/pi/Pictures /home/pi/.config /root/
sudo chown root:root /root/Desktop /root/Pictures /root/.config

9.21 Using NVME SSD on FriendlyDesktop

Please see this article: How to Initialize and Format New SSD And HDD

10 Work with FriendlyCore

10.1 Introduction

FriendlyCore is a Ubuntu core based OS which doesn't have X Desktop. Its current version is 18.04

FriendlyCore targets enterprise users and is customized for industrial applications. FriendlyCore and Ubuntu base target different users. FriendlyCore has both a commandline utility and a two GUI utilities:
1）Qt 5.10.0 cuustomized for ROCKCHIP3399. It supports GPU and VPU acceleration and has modules like: QtQuick/QtWebEngine/QtMultimedia/WebGL and three display plug-ins:KMS, EGLFS and XCB;
2) Xorg system. It can run X11 applications and supports hardware acceleration;

FriendlyCore for RK3399 has the following features:

• supports FriendlyElec's 7"LCD with capacitive touch - HD702. If a board is connected to both an LCD and an HDMI monitor the LCD and the HDMI monitor can be set to display either differently or the same;
• supports Gstreamer 1.0 multi-media framework;
• supports hard encoding video playing with either commandline utility or Qt player;
• supports Qt5 WebGL;
• supports Qt5 VNC and runs a Qt application as a VNC Server allowing remote control;
• supports bluetooth. It has preinstalled bluez packages;

10.2 System Login

• If your board is connected to an HDMI monitor you need to use a USB mouse and keyboard.
• If you want to do kernel development you need to use a serial communication board, ie a PSU-ONECOM board, which will

You can use a USB to Serial on SOM-RK3399：

• FriendlyCore User Accounts:

Non-root User:

   User Name: pi
   Password: pi

Root:

   User Name: root
   Password: fa

The system is automatically logged in as "pi". You can do "sudo npi-config" to disable auto login.

• Update packages

$ sudo apt-get update

10.3 Configure System with npi-config

The npi-config is a commandline utility which can be used to initialize system configurations such as user password, system language, time zone, Hostname, SSH switch , Auto login and etc. Type the following command to run this utility.

$ sudo npi-config

Here is how npi-config's GUI looks like:

10.4 Develop Qt Application

Please refer to: How to Build and Install Qt Application for FriendlyELEC Boards

10.5 Setup Program to AutoRun

You can setup a program to autorun on system boot with npi-config:

sudo npi-config

Go to Boot Options -> Autologin -> Qt/Embedded, select Enable and reboot.

10.6 Extend TF Card's Section

When FriendlyCore is loaded the TF card's section will be automatically extended.You can check the section's size by running the following command:

$ df -h

10.7 Transfer files using Bluetooth

Take the example of transferring files to the mobile phone. First, set your mobile phone Bluetooth to detectable status, then execute the following command to start Bluetooth search.：

hcitool scan

Search results look like：

Scanning ...
    2C:8A:72:1D:46:02   HTC6525LVW

This means that a mobile phone named HTC6525LVW is searched. We write down the MAC address in front of the phone name, and then use the sdptool command to view the Bluetooth service supported by the phone：

sdptool browser 2C:8A:72:1D:46:02

Note: Please replace the MAC address in the above command with the actual Bluetooth MAC address of the mobile phone.
This command will detail the protocols supported by Bluetooth for mobile phones. What we need to care about is a file transfer service called OBEX Object Push. Take the HTC6525LVW mobile phone as an example. The results are as follows：

Service Name: OBEX Object Push
Service RecHandle: 0x1000b
Service Class ID List:
  "OBEX Object Push" (0x1105)
Protocol Descriptor List:
  "L2CAP" (0x0100)
  "RFCOMM" (0x0003)
    Channel: 12
  "OBEX" (0x0008)
Profile Descriptor List:
  "OBEX Object Push" (0x1105)
    Version: 0x0100

As can be seen from the above information, the channel used by the OBEX Object Push service of this mobile phone is 12, we need to pass it to the obexftp command, and finally the command to initiate the file transfer request is as follows：

obexftp --nopath --noconn --uuid none --bluetooth -b 2C:8A:72:1D:46:02 -B 12 -put example.jpg

Note: Please replace the MAC address, channel and file name in the above command with the actual one.

After executing the above commands, please pay attention to the screen of the mobile phone. The mobile phone will pop up a prompt for pairing and receiving files. After confirming, the file transfer will start.

Bluetooth FAQ：
1) Bluetooth device not found on the development board, try to open Bluetooth with the following command：

rfkill unblock 0

2) Prompt can not find the relevant command, you can try to install related software with the following command：

apt-get install bluetooth bluez obexftp openobex-apps python-gobject ussp-push

10.8 WiFi

For either an SD WiFi or a USB WiFi you can connect it to your board in the same way. The APXX series WiFi chips are SD WiFi chips. By default FriendlyElec's system supports most popular USB WiFi modules. Here is a list of the USB WiFi modules we tested:

Index	Model
1	RTL8188CUS/8188EU 802.11n WLAN Adapter
2	RT2070 Wireless Adapter
3	RT2870/RT3070 Wireless Adapter
4	RTL8192CU Wireless Adapter
5	mi WiFi mt7601
6	5G USB WiFi RTL8821CU
7	5G USB WiFi RTL8812AU

You can use the NetworkManager utility to manage network. You can run "nmcli" in the commandline utility to start it. Here are the commands to start a WiFi connection:

• Change to root

$ su root

• Check device list

$ nmcli dev

Note: if the status of a device is "unmanaged" it means that device cannot be accessed by NetworkManager. To make it accessed you need to clear the settings under "/etc/network/interfaces" and reboot your system.

• Start WiFi

$ nmcli r wifi on

• Scan Surrounding WiFi Sources

$ nmcli dev wifi

• Connect to a WiFi Source

$ nmcli dev wifi connect "SSID" password "PASSWORD" ifname wlan0

The "SSID" and "PASSWORD" need to be replaced with your actual SSID and password.If you have multiple WiFi devices you need to specify the one you want to connect to a WiFi source with iface
If a connection succeeds it will be automatically setup on next system reboot.

For more details about NetworkManager refer to this link: Use NetworkManager to configure network settings

If your USB WiFi module doesn't work most likely your system doesn't have its driver. For a Debian system you can get a driver from Debian-WiFi and install it on your system. For a Ubuntu system you can install a driver by running the following commands:

$ apt-get install linux-firmware

In general all WiFi drivers are located at the "/lib/firmware" directory.

10.9 Ethernet Connection

If a board is connected to a network via Ethernet before it is powered on it will automatically obtain an IP with DHCP activated after it is powered up. If you want to set up a static IP refer to: Use NetworkManager to configure network settings。

10.10 Custom welcome message

The welcome message is printed from the script in this directory：

/etc/update-motd.d/

For example, to change the FriendlyELEC LOGO, you can change the file /etc/update-motd.d/10-header. For example, to change the LOGO to HELLO, you can change the following line：

TERM=linux toilet -f standard -F metal $BOARD_VENDOR

To:

TERM=linux toilet -f standard -F metal HELLO

10.11 Modify timezone

For exampe, change to Shanghai timezone:

sudo rm /etc/localtime
sudo ln -ls /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

10.12 Select the system default audio device

You can set the system default audio device by following the steps below.
Use the following command to view all the sound card devices in the system (Note: different development boards will have different results):

pi@NanoPi:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: realtekrt5651co [realtek,rt5651-codec], device 0: ff880000.i2s-rt5651-aif1 rt5651-aif1-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: rockchiphdmi [rockchip,hdmi], device 0: ff8a0000.i2s-i2s-hifi i2s-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: ROCKCHIPSPDIF [ROCKCHIP,SPDIF], device 0: ff870000.spdif-dit-hifi dit-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

As you can see, the following sound card devices are available on the hardware:

Sound card device	Sound card number	Description
realtekrt5651co	0	Realtek sound card's default output interface (through 3.5mm jack interface)
rockchiphdmi	1	HDMI
ROCKCHIPSPDIF	2	SPDIF (Note: temporarily unavailable, because the hardware is not exported)...

To configure the audio output to the 3.5mm jack, modify the configuration file /etc/asound.conf and modify it to the following:

defaults.pcm.card 0
defaults.pcm.device 0

To configure to output audio to HDMI, change the defaults.pcm.card above to 1.
Note that some boards do not have a Realtek sound card (no 3.5mm jack interface), so the card number of the HDMI device will be 0, so the configuration should be based on the result of the aplay -l command.

10.13 Change the behavior of the PWM fan

By default, the speed of the fan is dynamically adjusted according to the CPU temperature. If you need to let the fan run, you can modify the script /usr/bin/start-rk3399-pwm-fan.sh to the following:

#!/bin/bash
 
echo 0 > /sys/class/pwm/pwmchip1/export
sleep 1
echo 0 > /sys/class/pwm/pwmchip1/pwm0/enable
echo 50000 > /sys/class/pwm/pwmchip1/pwm0/period
echo 1 > /sys/class/pwm/pwmchip1/pwm0/enable
echo 45000 > /sys/class/pwm/pwmchip1/pwm0/duty_cycle

10.14 Run the X11 application

FriendlyCore system built-in lightweight Xorg，although there is no window manager, you can still run a single X-Windows application，For example, the program to run is ~/YourX11App，use the following command：

. /usr/bin/setqt5env-xcb
startx ~/YourX11App -geometry 1280x800

Note that there is a space between "." and /usr/bin/setqt5env-xcb. In addition, the resolution after -geometry should be changed to the actual resolution of your screen.

10.15 Mpv hardware decoding video player

FriendlyCore comes pre-installed with the ffmpeg-based command line video player mpv, which also includes libmpv.
The mpv player supports Rockchip MPP video decoder, so it supports 4K hardware decoding. There are many parameters of mpv. In order to simplify the use, we provide a script start-mpv. After simplification, there is only one parameter: video file name, as follows:

start-mpv /home/pi/demo.mp4

It should be noted that the pi user needs to log in during playback, because there are no mpv related settings in other users' directories. Of course, you can copy one from the pi user directory. The mpv settings file is stored in the following path：

/home/pi/.config/mpv/mpv.conf

The contents of the mpv.conf file are as follows：

vo=gpu
gpu-context=drm
hwdec=rkmpp
demuxer-max-bytes=41943040
demuxer-max-back-bytes=41943040
drm-osd-plane-id=1
drm-video-plane-id=0
audio-device=alsa/default:CARD=rockchiphdmi

These will be passed as parameters to mpv. When the value of hwdec is rkmpp, it means using hardware decoding, audio-device is used to specify the audio output device, and the default output is to HDMI. You can use the following command to query which audio devices are in the system：

mpv --audio-device=help

Another important parameter is drm-osd-size. When playing video in full screen, drm-osd-size is specified as the resolution of the screen. This parameter is automatically obtained by start-mpv and passed to mpv, start-mpv script will do one more important thing. It needs to ensure that the libmali library in the system uses the correct version, because mpv renders the image through gbm, so libmali.so needs to use this version: libmali-midgard-t86x -r14p0-gbm.so, which means that this version of mpv can only be used under FriendlyCore, can not be used under X11 Desktop.
Mpv official use guide：https://github.com/mpv-player/mpv/wiki

11 Features applicable to FriendlyDesktop and FriendlyCore

11.1 Using Camera on Linux (MIPI Camera OV13850 & OV4689, and webcam logitect C920)

Hardware Setting: The Camera module can be connected to a MIPI port:

FriendlyELEC provides some scripts use to test a camera's functions. You can run it in a commandline to test picture taking and video recording.
You may try update this script to the lastest version by using the following commands:

cd /tmp/
git clone https://github.com/friendlyarm/gst-camera-sh.git
sudo cp gst-camera-sh/*.sh /usr/bin/

There are three scripts:
gst-camera.sh: preview, photo and video of a single camera
dual-camera.sh: preview two cameras
stop-gst-camera.sh: stop preview

11.1.1 Options in "gst-camera.sh"

Options	Comment
--index or -i	Camera's index, it can be either 0 or 1. When two cameras are connected to a board you need to specify 1 to access the second camera.
--action or -a	Specify an action, it can be "preview" to preview, "photo" to take a picture or "video" to record video
--output or -o	Specify an output file to save a picture when taking a picture or video file when recording video
--verbose or -v	If it is specified as "yes" it will output the complete command when "gst-launch-1.0" is called
-x	Using the rkximagesink plugin, the preview image will be output to the X11 window for the FriendlyDesktop and Lubuntu systems
-g	Using the glimagesink plugin, the preview image will be output to the X11 window for the FriendlyDesktop and Lubuntu systems
-k	Using the kmssink plugin, the preview image will be output directly to the screen for the FriendlyCore system

The script gst-camera.sh will automatically recognize OV13850, OV4689 and C920 camera, and then pass the appropriate parameters to gst-launch-1.0.

11.1.2 Usage of gst-camera.sh

• Preview

gst-camera.sh --action preview

• Picture Taking

You can run the following command to take a picture and save it as a "1.jpg" file,

gst-camera.sh -a photo -o 1.jpg

• Preview and Record

You can run the following command to record video and save your video to a "1.ts" file. Hardware encoding is activated when it is recording video.

gst-camera.sh --action video -output 1.ts

• Show Complete Command

If you add the "--verbose yes" option it will show a complete gsteamer command.

gst-camera.sh --action video --output 1.ts --verbose yes

Here is the complete gsteamer command you will see:

gst-launch-1.0 rkisp num-buffers=512 device=/dev/video0 io-mode=1 ! \
    video/x-raw,format=NV12,width=1280,height=720,framerate=30/1 ! \
        mpph264enc ! queue ! h264parse ! mpegtsmux ! \
        filesink location=/tmp/camera-record.ts

• Preview dual camera

Connect two mipi cameras, or one mipi camera and one usb camera (tested only: Logitech C920 pro), call the following command：

dual-camera.sh

Note: It is recommended to test this on FriendlyDesktop.

11.1.3 gst-launch-1.0 parameter description

Preview camera on FriendlyDesktop：

gst-launch-1.0 rkisp device=/dev/video1 io-mode=4 ! video/x-raw,format=NV12,width=1280,height=720,framerate=30/1 ! rkximagesink

Important parameters

parameter	description
device	preview device(selfpath): /dev/video1 and /dev/video5, picture device(mainpath): /dev/video0 and /dev/video4, webcam device: /dev/video8
io-mode	1: memory map, 4:dmabuf
rkximagesink/glimagesink/kmssink	rkximagesink for FriendlyDesktop, kmssink for FriendlyCore, glimagesink for webcam on FriendlyDesktop

11.1.4 Access the camera in OpenCV

MIPI camera：

cv.VideoCapture('rkisp device=/dev/video1 io-mode=4 ! video/x-raw,format=NV12,width=640,height=480,framerate=30/1 ! videoconvert ! appsink', cv.CAP_GSTREAMER)

USB camera：

cv.VideoCapture('rkisp device=/dev/video8 io-mode=4 ! videoconvert ! video/x-raw,format=NV12,width=640,height=480,framerate=30/1 ! videoconvert ! appsink', cv.CAP_GSTREAMER)

Please refer to the sample code here for details：https://github.com/friendlyarm/install-opencv-on-friendlycore/tree/rk3399/examples

11.1.5 Camera application tutorial: Push video stream

Please refre this guide: How to setup RTMP server on NanoPC-T4

11.1.6 Reference resource

http://blog.iotwrt.com/media/2017/10/01/camera/ http://www.360doc.com/content/16/1019/17/496343_599664458.shtml

11.2 How to install and use docker

11.2.1 How to Install Docker

Run the following commands：

wget https://download.docker.com/linux/ubuntu/dists/bionic/pool/stable/arm64/containerd.io_1.2.6-3_arm64.deb
wget https://download.docker.com/linux/ubuntu/dists/bionic/pool/stable/arm64/docker-ce-cli_19.03.2~3-0~ubuntu-bionic_arm64.deb
wget https://download.docker.com/linux/ubuntu/dists/bionic/pool/stable/arm64/docker-ce_19.03.2~3-0~ubuntu-bionic_arm64.deb
sudo dpkg -i containerd.io_1.2.6-3_arm64.deb
sudo dpkg -i docker-ce-cli_19.03.2~3-0~ubuntu-bionic_arm64.deb
sudo dpkg -i docker-ce_19.03.2~3-0~ubuntu-bionic_arm64.deb

11.2.2 Test Docker installation

Test that your installation works by running the simple docker image:

git clone https://github.com/friendlyarm/debian-jessie-arm-docker
cd debian-jessie-arm-docker
./rebuild-image.sh
./run.sh

11.3 Using ffmpeg (video hardware decoding)

Both FriendlyCore and FriendlyDesktop systems are built-in ffmpeg, with bin file, static libraries, and header files, all stored in the /usr/ffmpeg-rkmp directory.
ffmpeg supports the RockChip MPP video decoder, for details, please refer to: https://trac.ffmpeg.org/wiki/HWAccelIntro

Test the decoding performance of 4K video:

/usr/ffmpeg-rkmp/bin/ffmpeg -benchmark -loglevel 48 -vcodec h264_rkmpp -i 4K-Chimei-inn-60mbps.mp4 -map 0:v:0 -f null -

The results are shown below:

To play the video, you can use the ffmpeg-based player mpv. The 4K video used for the above test can be found in the test-video directory of the network disk. The network address is http://dl.friendlyelec.com/nanopct4.

12 Connect NVME SSD High Speed Hard Disk

12.1 Detection of SSD

root@FriendlyELEC:~# cat /proc/partitions 
major minor  #blocks  name
   1        0       4096 ram0
 259        0  125034840 nvme0n1

If there is a nvme0n1 device node it means an SSD is recognized.

12.2 Partition of SSD

To mount an SSD under Linux we re-partition it as one section by running the following command:

(echo g; echo n; echo p; echo 1; echo ""; echo ""; echo w; echo q) | fdisk /dev/nvme0n1

If you want to re-partition it to multiple sections you can run "fdisk /dev/nvme0n1". For more detail about this command refer to the fdisk's manual.

12.3 Format Section to EXT4

After an SSD is successfully partitioned you can check its sections by running "cat /proc/partitions". The /dev/nvme0n1p1 section is used to store data:

root@FriendlyELEC:~# cat /proc/partitions
major minor  #blocks  name
 
   1        0       4096 ram0
 259        0  125034840 nvme0n1
 259        2  125033816 nvme0n1p1

The following command formats a section to ext4:

mkfs.ext4 /dev/nvme0n1p1

12.4 Auto Mount SSD on System Startup

Before we mount an SSD's section you need to know its Block ID. You can check it by running "blkid":

blkid /dev/nvme0n1p1
/dev/nvme0n1p1: UUID="d15c4bbf-a6c3-486f-8f81-35a8dbd46057" TYPE="ext4" PARTUUID="887628f0-01"

Add a "Block ID" to "/etc/fstab" and here is what it looks like

UUID=<Block ID> /media/nvme ext4 defaults 0 0

You need to replace <Block ID> with the UUID obtained by running "blkid". To mount the SSD in our example we made the "/etc/fstab" file as follows:

UUID=d15c4bbf-a6c3-486f-8f81-35a8dbd46057 /media/nvme ext4 defaults 0 0

We want to mount an SSD to "/media/nvme" but this directory doesn't exist. Therefore we create it and change its access right by running the following commands:

mkdir -p /media/nvme
chmod 777 /media/nvme

Run "mount" to check if the SSD is mounted successfully:

mount /media/nvme

You can reboot your board to check if your SSD will be automatically mounted:

reboot

12.5 Fan speed setting

The fan uses PWM to automatically adjust the speed. It determines the fan switch and the fan speed according to the current CPU temperature. If the current CPU temperature is not high, the fan will be turned off or rotated at a lower speed (reducing unnecessary environmental noise). ),
If you want the fan to start working immediately, you can use the following command to get the CPU running at high load immediately. This is one way to test if the fan works：

cpuburn

if you want to change the speed regulation behavior of the fan, please modify the following file:

/usr/bin/fa-fancontrol.sh # Entry, called by the pwm-fan.service service to control the fan in two ways, either by the kernel or by the user space by control the PWM.
/usr/bin/fa-fancontrol-direct.sh # Script to control the fan from user space by control the PWM to control the fan speed, etc. This script is called from the above script.

Need to cancel the boot automatically start the fan (such as you need to connect the other PWM device), please enter the following command：

systemctl stop pwm-fan
systemctl disable pwm-fan

Or delete the two files below：

/etc/systemd/system/pwm-fan.service
/etc/systemd/system/multi-user.target.wants/pwm-fan.service

12.6 Using 4G Module EC20 on Linux

Please see this article: How to use 4G Module on SOM-RK3399

13 Buildroot Linux

Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. It contains a boot-loader, kernel, rootfs, various libraries and utilities(e.g. qt, gstreamer, busybox etc).

FriendlyELEC's Buildroot is based on Rockchip's version which is made with linux-sdk and maintained with git. FriendlyELEC's version is synced with Rockchip's version;

• Rockchip's Buildroot: https://github.com/rockchip-linux/buildroot
  
• Buildroot's official site: https://buildroot.org

Here is what Buildroot for rockchip looks like

• 
• 

• 
• 

For a more detailed description of the Buildroot system, please refer to: Buildroot

14 Work with Lubuntu

See here: Lubuntu desktop 16.04 for RK3399
Using NVME SSD on Lubuntu: How to Initialize and Format New SSD And HDD

15 Work with Android 8.1

FriendlyElec provides a full Android8.1 BSP for SOM-RK3399. The source code is hosted at gitlab.com and is open source. The BSP supports GPU and VPU hardware acceleration.

15.1 Connect MIPI Camera to SOM-RK3399

FriendlyElec developed a MIPI camera CAM1320 for board and it works under Android. You can use this camera to take pictures and record video. The operation is straightforward. You just need to connect the camera at your board's MIPI interface, boot your board to Android and start Android's camera app.

15.2 Use dual MIPI camera preview and video

Download the sample source code below from github and compile and run it：

git clone https://github.com/friendlyarm/Dual-Camera.git -b working-branch

After the application is installed, you need to Set Android permissions to make the demo run normally. The method is enter system ui: Settings -> Apps & notifications -> Dual Camera -> Permissions, Select the following permissions：

Camera
Microphone
Storage

The gui looks like this：

Click the "CAPTURE VIDEO" button on the gui to record the video (two cameras at the same time), and the video file will be saved to the following location.：/storage/emulated/0/Download/dualcamera_h264.mp4. Known issue：
Recorded video file will play faster than normal, may need to adjust some parameters of mediacodec.

15.3 Change system language

The default system language of Android system is English. For example, if we want to set it to Chinese, the steps are as follows: 1) Go to Android settings：Settings -> System -> Languages & Input -> Languages;
2）Click "Add a language", Select "简体中文", and then select "中国";
3) At this time, there will be two languages, Chinese and English. Drag the Chinese item to the top of the list. Note that if you are using a mouse, drag it by placing the mouse pointer on the right side of the list item. On the icon and then press the middle mouse button to drag;

15.4 Android8.1 hardware access

You can use the FriendlyThings SDK to access and control hardware resources on the motherboard in the Android App, such as Uart, SPI, I2C, GPIO and other interfaces. For details, please refer to the following two documents.：

• Android: FriendlyThings for Rockchip
• Android: FriendlyThings APIs

15.5 Android Neural Networks SDK Sample

Android8.1 BSP comes pre-installed with Rockchip's Android NN SDK for Android 8.1, supporting GPU acceleration.。
Sample program for Android NN pre-installed in the Android8 firmware we provide：TfLiteCameraDemo，This is a MobileNet classifier demo using Rockchip AndroidNN GPU acceleration，The camera module is required to be connected to the motherboard during operation. The USB camera and CSI camera are supported，The sample program is launched by clicking the "TfLiteCameraDemo" icon on the home page. The running effect is as follows：


For a detailed description of the Android NN SDK, you can refer to this document：[RK3399_Android8.1_AndroidNN_SDK_V1.0_20180605发布说明.pdf]
TfLiteCameraDemo sample source code download link：[TfLiteCameraDemo source code]

15.6 Using the adb

1. The first time you start the system, if you need to change the system files, you need to turn off security verification (note: apk installation does not need to be closed), and restart after turning off security verification

adb root
adb disable-verity
adb reboot

2. After restarting, get root and remount /system to enable write permissions

adb root
adb remount

3. Upload a file

adb push example.txt /system/

15.7 HDMI resolution and overscan setting

If an HDMI display device is connected, go to Android Settings -> Display -> Advanced -> HDMI & Rotation to set it up.

HDMI Resolution	The default is Auto, you can manually set the display resolution, up to 4K resolution
Screen Zoom	click the four arrow buttons in the middle to adjust the zoom
Display Rotation	for horizontal and vertical screen switching

15.8 Screen rotation

go to Android Settings -> Display -> Advanced -> HDMI & Rotation to set it up.

Use the following command in shell to test screen rotation (Settings not saved)：

wm rotation 90

15.9 Hide Navigation bar

Enter Settings -> Accessibility, Turn on immersive mode, and then open an Android application, For example: Lightning, it will be in full screen mode.

15.10 Switch audio output channel

You can configure the audio output to the HDMI or headphone jack, Setting interface entry method: Android Settings -> Accessibility -> Force audio output. If the Force audio output menu item is gray, that is, it is in an unselectable state, the hardware you are using will automatically detect the headphone plug-in status and automatically switch the audio channel without setting.

15.11 Adjust the volume of the recording

1) First use the amix command to adjust the volume of the recording through the serial port or the adb shell with root privileges, for example:

Amix "IN2 Boost"
Amix "ADC Capture Volume"

The above command is used to view the current settings.
2) After debugging, modify the value of the corresponding configuration item in the rt5651_main_mic_capture_controls array in the hardware/rockchip/audio/tinyalsa_hal/codec_config/rt5651_config.h file, compile the Android source code and test it.

15.12 Custom logo and boot animation

15.12.1 On/Off

Change:
BOOT_SHUTDOWN_ANIMATION_RINGING := false
to:
BOOT_SHUTDOWN_ANIMATION_RINGING := true
in device/rockchip/common/BoardConfig.mk file.

15.12.2 Boot animation

Create or replace the following files in the Android source code directory：
kernel/logo.bmp
kernel/logo_kernel.bmp
device/rockchip/common/bootshutdown/bootanimation.zip

15.12.3 Shutdown animation

Create or replace the following files in the Android source code directory：
device/rockchip/common/bootshutdown/shutdownanimation.zip

15.12.4 How to make animation

Please refre to：http://blog.sina.com.cn/s/blog_4960586c0100vu5v.html

15.13 Remove Google Framework

If you don't need to use the google service, you can delete the Google framework to save system resources by deleting the following directory in the Android source code and recompiling Android:
vendor/google

15.14 Navigate Android with Remote Control

The SOM-RK3399 supports the FriendlyARM RC-100 remote control under Android. To get a better experience your can connect your T4 to an HDMI monitor and navigate Android.


Here is a table for the remote control's keys and corresponding functions:

Key	Function
Up	Navigate - Up
Down	Navigate - Down
Left	Navigate - Left
Right	Navigate - Right
OK	Confirm
-	Volume -
+	Volume +
Mute	Mute
Menu	Android Menu
Home	Android Home
Return	Android Return
F1	Pull-Down Android Message Bar
F2	Android Screenshot
F3	Switch between mouse and key

15.15 Work with USB Camera to Take Pictures and Record Video

FriendlyELEC's Android system supports picture taking and video recording with a USB camera, Android's camera app has these functions. When you use the app to take pictures or record video you need to be aware of the following two things:
1) Make sure your camera's resolution works. We suggest you try a camera with a lower CIF resolution first. If it works you may switch to a camera with a higher resolution:
;
2）A USB camera cannot work simultaneously with a MIPI camera. Plug and play is not supporter for camera modules. After you connect a camera to a board you need to reboot your board to enable the camera.

Here are the camera modules we tested: Logitech C270 and LogitechC922 PRO
In our test the resolution was 1080P when we used a Logitech C922 PRO to take pictures or record video.

15.16 Using 4G Module EC20 on Android

15.16.1 Hardware Setup

Connect an EC20 module to a USB to miniPCIe board and connect the board to an ARM board's USB Host. Here is a hardware setup:

Power on the board and you will be able to surf the internet with the 4G module like using an Android phone.

15.16.2 Activate EC20's GPS Functions

By default GPS functions are disabled in Android. If GPS functions are enabled in Android but no GPS module is detected Android will continuously output log messages. After an EC20 module is connected you can enable GPS functions.
To enable the GPS functions open the "vendor/quectel/ec20/BoardConfigPartial.mk" file and change the following line:

BOARD_HAS_GPS := false

to

BOARD_HAS_GPS := true

and recompile Android。

15.17 Using SSD on Android

15.17.1 Step1: Format SSD as ext4

These steps need to be operated under the LINUX system.

For the convenience of operation, please switch to the root user with the following command on the terminal:

su -

The default password for the root user is fa.

15.17.1.1 Detection of SSD

root@FriendlyELEC:~# cat /proc/partitions 
major minor  #blocks  name
   1        0       4096 ram0
 259        0  125034840 nvme0n1

If there is a nvme0n1 device node it means an SSD is recognized.

15.17.1.2 Partition of SSD

To mount an SSD under Linux we re-partition it as one section by running the following command:

(echo o; echo n; echo p; echo 1; echo ""; echo ""; echo w; echo q) | fdisk /dev/nvme0n1

If you want to re-partition it to multiple sections you can run "fdisk /dev/nvme0n1". For more detail about this command refer to the fdisk's manual.

15.17.1.3 Format partition to EXT4

After an SSD is successfully partitioned you can check its partitions by running "cat /proc/partitions". The /dev/nvme0n1p1 partition is used to store data:

root@FriendlyELEC:~# cat /proc/partitions
major minor  #blocks  name
 
   1        0       4096 ram0
 259        0  125034840 nvme0n1
 259        2  125033816 nvme0n1p1

The following command formats a section to ext4:

mkfs.ext4 /dev/nvme0n1p1 -L SSD

15.17.2 Step2: Auto Mount SSD on Android System Startup

Android will automatically mount the SSD as an external storage device. No additional settings are required. Open the built-in Files application of Android and you can see that the SSD device is mounted：

third-party software can recognize SSDs normally.

15.18 Fan speed setting

The fan uses PWM to achieve automatic speed regulation. It determines the fan switch and the fan speed according to the current CPU temperature. If the current CPU temperature is not high, the fan will be turned off or rotated at a lower speed (reducing unnecessary environment). Noise), if you want to change the fan's speed behavior, please modify the following files in the Android bsp source code：

device/rockchip/rk3399/nanopc-t4/pwm_fan.sh

Need to cancel the boot automatically start the fan (such as you need to connect other PWM devices), please modify the following files in the Android bsp source code：

device/rockchip/rk3399/init.rk3399.rc

After modifying the source code, you need to recompile Android.

16 Work with Android7.1

See here: Android7

17 How to Compile

17.1 Setup Development Environment

17.1.1 Method 1: Using docker to cross-compile

Please refre to docker-cross-compiler-novnc

17.1.2 Method 2: Setup build environment on the host machine

17.1.2.1 Install required packages

Install and run requirements ubuntu 20.04, install required packages using the following commands:

sudo apt-get -y update
sudo apt-get install -y sudo curl
sudo bash -c \
  "$(curl -fsSL https://raw.githubusercontent.com/friendlyarm/build-env-on-ubuntu-bionic/master/install.sh)"

The following cross-compilers will be installed:

Version	Architecture	Compiler path	Purpose
4.9.3	armhf	/opt/FriendlyARM/toolchain/4.9.3	Can be used to build 32-bit ARM applications
6.4	aarch64	/opt/FriendlyARM/toolchain/6.4-aarch64	Can be used to build kernel 4.4
11.3	aarch64	/opt/FriendlyARM/toolchain/11.3-aarch64	Can be used to build kernel 4.19 or higher and U-Boot

17.1.2.2 Setting the compiler path

Based on the table in the previous section, select the appropriate version of the compiler and add the compiler's path to PATH. For example, if you want to use the 11.3 cross-compiler, edit ~/.bashrc using vi and add the following content to the end:

export PATH=/opt/FriendlyARM/toolchain/11.3-aarch64/bin:$PATH
export GCC_COLORS=auto

Run the ~/.bashrc script to make it effective in the current commandline. Note: there is a space after ".":

. ~/.bashrc

To verify if the installation was successful：

$ aarch64-linux-gcc -v
Using built-in specs.
COLLECT_GCC=aarch64-linux-gcc
COLLECT_LTO_WRAPPER=/opt/FriendlyARM/toolchain/11.3-aarch64/libexec/gcc/aarch64-cortexa53-linux-gnu/11.3.0/lto-wrapper
Target: aarch64-cortexa53-linux-gnu
Configured with: /home/cross/arm64/src/gcc/configure --build=x86_64-build_pc-linux-gnu --host=x86_64-build_pc-linux-gnu --target=aarch64-cortexa53-linux-gnu --prefix=/opt/FriendlyARM/toolchain/11.3-aarch64 --exec_prefix=/opt/FriendlyARM/toolchain/11.3-aarch64 --with-sysroot=/opt/FriendlyARM/toolchain/11.3-aarch64/aarch64-cortexa53-linux-gnu/sysroot --enable-languages=c,c++ --enable-fix-cortex-a53-843419 --with-arch=armv8-a+crypto+crc --with-cpu=cortex-a53 --with-pkgversion=ctng-1.25.0-119g-FA --with-bugurl=http://www.friendlyelec.com/ --enable-objc-gc --enable-__cxa_atexit --disable-libmudflap --disable-libgomp --disable-libssp --disable-libquadmath --disable-libquadmath-support --disable-libsanitizer --disable-libmpx --with-gmp=/home/cross/arm64/buildtools --with-mpfr=/home/cross/arm64/buildtools --with-mpc=/home/cross/arm64/buildtools --with-isl=/home/cross/arm64/buildtools --enable-lto --enable-threads=posix --disable-libstdcxx-pch --enable-clocale=gnu --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-indirect-function --enable-gnu-unique-object --enable-default-pie --enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin --enable-gold --with-libintl-prefix=/home/cross/arm64/buildtools --disable-multilib --with-local-prefix=/opt/FriendlyARM/toolchain/11.3-aarch64/aarch64-cortexa53-linux-gnu/sysroot --enable-long-long --enable-checking=release --enable-link-serialization=2
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 11.3.0 (ctng-1.25.0-119g-FA)

17.2 Build Openwrt/Friendlywrt

17.2.1 Download Code

Two versions are available, please choose as required:

17.2.1.1 FriendlyWrt 21.02

mkdir friendlywrt21-rk3399
cd friendlywrt21-rk3399
git clone https://github.com/friendlyarm/repo --depth 1 tools
tools/repo init -u https://github.com/friendlyarm/friendlywrt_manifests -b master-v21.02 \
        -m rk3399.xml --repo-url=https://github.com/friendlyarm/repo  --no-clone-bundle
tools/repo sync -c  --no-clone-bundle

17.2.1.2 FriendlyWrt 23.05

mkdir friendlywrt23-rk3399
cd friendlywrt23-rk3399
git clone https://github.com/friendlyarm/repo --depth 1 tools
tools/repo init -u https://github.com/friendlyarm/friendlywrt_manifests -b master-v23.05 \
        -m rk3399.xml --repo-url=https://github.com/friendlyarm/repo  --no-clone-bundle
tools/repo sync -c  --no-clone-bundle

17.2.2 First compilation step

./build.sh rk3399.mk  # or rk3399-docker.mk

All the components (including u-boot, kernel, and friendlywrt) are compiled and the sd card image will be generated, then execute the following command to generate the image file for installing the system into the emmc:

./build.sh emmc-img

After making changes to the project, the sd card image needs to be repackaged by running the following command:

./build.sh sd-img

17.2.3 Secondary compilation steps

cd friendlywrt
make menuconfig
rm -rf ./tmp
make -j${nproc}
cd ../
./build.sh sd-img
./build.sh emmc-img

17.2.4 Build u-boot only

./build.sh uboot

17.2.5 Build kernel only

./build.sh kernel

17.2.6 Build friendlywrt only

./build.sh friendlywrt

Or go to the friendlywrt directory and follow the standard openwrt commands. If you get an error with the above command, try using the following command to compile in a single thread:

cd friendlywrt
make -j1 V=s

17.3 Build Buildroot

please refer to: Buildroot

17.4 Build Other Linux

17.4.1 Kernel and u-boot versions

Operating System	Kernel Version	U-boot version	Cross-compiler	Partition type	Packaging Tool	Kernel branch	Kernel configuration	U-boot branch	U-boot configuration
lubuntu	linux v4.4.y	u-boot v2014.10	6.4-aarch64	MBR	sd-fuse	nanopi4-linux-v4.4.y	nanopi4_linux_defconfig	nanopi4-v2014.10_oreo	rk3399_defconfig
friendlycore-arm64
friendlydesktop-arm64
eflasher
buildroot	linux v4.19.y	u-boot v2017.09	11.3-aarch64	GPT	sd-fuse	nanopi4-v4.19.y	nanopi4_linux_defconfig	nanopi4-v2017.09	nanopi4_defconfig
ubuntu-focal-desktop-arm64
debian-bullseye-desktop-arm64
debian-bullseye-minimal-arm64
friendlycore-focal-arm64
debian-bookworm-core-arm64
ubuntu-noble-core-arm64
openmediavault-arm64	linux v6.1.y	u-boot v2017.09	11.3-aarch64	GPT	sd-fuse	nanopi-r2-v6.1.y	nanopi4_linux_defconfig
friendlywrt21				GPT			nanopi4_linux_defconfig +friendlywrt.config
friendlywrt21-docker
friendlywrt23
friendlywrt23-docker

• Kernel git repo：https://github.com/friendlyarm/kernel-rockchip
• U-boot git repo：https://github.com/friendlyarm/uboot-rockchip
• The cross-compile toolchain is located in the path: /opt/FriendlyARM/toolchain/
• The SD-Fuse is a helper script to make bootable SD card image.
• Click on MBR and GPT in the table to view the partition layout (configuration file) for each system.

17.4.2 Build kernel linux-v4.4.y

This section applies to the following operating systems:

lubuntu

eflasher

friendlydesktop-arm64

friendlycore-arm64

Clone the repository to your local drive then build:

git clone https://github.com/friendlyarm/kernel-rockchip --single-branch --depth 1 -b nanopi4-linux-v4.4.y kernel-rockchip
cd kernel-rockchip
export PATH=/opt/FriendlyARM/toolchain/6.4-aarch64/bin/:$PATH
touch .scmversion
# Load configuration
make ARCH=arm64 CROSS_COMPILE=aarch64-linux- nanopi4_linux_defconfig
# Optionally, if you want to change the default kernel config
# make ARCH=arm64 CROSS_COMPILE=aarch64-linux- menuconfig  
# Start building kernel
make ARCH=arm64 CROSS_COMPILE=aarch64-linux- nanopi4-images -j$(nproc)
# Start building kernel modules
mkdir -p out-modules
make ARCH=arm64 CROSS_COMPILE=aarch64-linux- INSTALL_MOD_PATH="$PWD/out-modules" modules -j$(nproc)
make ARCH=arm64 CROSS_COMPILE=aarch64-linux- INSTALL_MOD_PATH="$PWD/out-modules" modules_install
KERNEL_VER=$(make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 kernelrelease)
rm -rf $PWD/out-modules/lib/modules/${KERNEL_VER}/kernel/drivers/gpu/arm/mali400/
[ ! -f "$PWD/out-modules/lib/modules/${KERNEL_VER}/modules.dep" ] && depmod -b $PWD/out-modules -E Module.symvers -F System.map -w ${KERNEL_VER}
(cd $PWD/out-modules && find . -name \*.ko | xargs aarch64-linux-strip --strip-unneeded)

After the compilation, the following files will be generated:

kernel.img

resource.img

The kernel modules are located in the out-modules directory

Run your build:
Please refre to #Running the build

17.4.3 Build u-boot v2014.10

This section applies to the following operating systems:

lubuntu

eflasher

friendlydesktop-arm64

friendlycore-arm64

Clone the repository to your local drive then build:

git clone https://github.com/friendlyarm/uboot-rockchip --single-branch --depth 1 -b nanopi4-v2014.10_oreo
cd uboot-rockchip
export PATH=/opt/FriendlyARM/toolchain/6.4-aarch64/bin/:$PATH
make CROSS_COMPILE=aarch64-linux- rk3399_defconfig
make CROSS_COMPILE=aarch64-linux-

After the compilation, the following files will be generated:

uboot.img

trust.img

rk3399_loader_v1.22.119.bin (aka MiniLoaderAll.bin)

Installing the u-boot:
Please refre to #Running the build

17.4.4 Build kernel linux-v4.19.y

This section applies to the following operating systems:

ubuntu-focal-desktop-arm64

debian-bullseye-desktop-arm64

debian-bullseye-minimal-arm64

friendlycore-focal-arm64

ubuntu-noble-core-arm64

debian-bookworm-core-arm64

buildroot

Clone the repository to your local drive then build:

git clone https://github.com/friendlyarm/kernel-rockchip --single-branch --depth 1 -b nanopi4-v4.19.y kernel-rockchip
cd kernel-rockchip
export PATH=/opt/FriendlyARM/toolchain/11.3-aarch64/bin/:$PATH
touch .scmversion
# Configuring the Kernel
# Load default configuration
make ARCH=arm64 CROSS_COMPILE=aarch64-linux- nanopi4_linux_defconfig
# Optionally, load configuration for FriendlyWrt
# make ARCH=arm64 CROSS_COMPILE=aarch64-linux- nanopi4_linux_defconfig friendlywrt.config
# Optionally, if you want to change the default kernel config
# make ARCH=arm64 CROSS_COMPILE=aarch64-linux- menuconfig
# Start building kernel
make ARCH=arm64 CROSS_COMPILE=aarch64-linux- nanopi4-images -j$(nproc)
# Start building kernel modules
mkdir -p out-modules
make ARCH=arm64 CROSS_COMPILE=aarch64-linux- INSTALL_MOD_PATH="$PWD/out-modules" modules -j$(nproc)
make ARCH=arm64 CROSS_COMPILE=aarch64-linux- INSTALL_MOD_PATH="$PWD/out-modules" modules_install
KERNEL_VER=$(make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 kernelrelease)
rm -rf $PWD/out-modules/lib/modules/${KERNEL_VER}/kernel/drivers/gpu/arm/mali400/
[ ! -f "$PWD/out-modules/lib/modules/${KERNEL_VER}/modules.dep" ] && depmod -b $PWD/out-modules -E Module.symvers -F System.map -w ${KERNEL_VER}
(cd $PWD/out-modules && find . -name \*.ko | xargs aarch64-linux-strip --strip-unneeded)

After the compilation, the following files will be generated:

kernel.img

resource.img

The kernel modules are located in the out-modules directory

Run your build:
Please refre to #Running the build

17.4.5 Build kernel linux-v6.1.y

This section applies to the following operating systems:

friendlywrt21

friendlywrt21-docker

friendlywrt23

friendlywrt23-docker

openmediavault-arm64

Clone the repository to your local drive then build:

git clone https://github.com/friendlyarm/kernel-rockchip --single-branch --depth 1 -b nanopi-r2-v6.1.y kernel-rockchip
cd kernel-rockchip
export PATH=/opt/FriendlyARM/toolchain/11.3-aarch64/bin/:$PATH
touch .scmversion
# Configuring the Kernel
# Load default configuration
make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 nanopi4_linux_defconfig
# Optionally, load configuration for FriendlyWrt
# make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 nanopi4_linux_defconfig friendlywrt.config
# Optionally, if you want to change the default kernel config
# make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 menuconfig
# Start building kernel
make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 -j$(nproc)
# Start building kernel modules
mkdir -p out-modules && rm -rf out-modules/*
make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 INSTALL_MOD_PATH="$PWD/out-modules" modules -j$(nproc)
make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 INSTALL_MOD_PATH="$PWD/out-modules" modules_install
KERNEL_VER=$(make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 kernelrelease)
[ ! -f "$PWD/out-modules/lib/modules/${KERNEL_VER}/modules.dep" ] && depmod -b $PWD/out-modules -E Module.symvers -F System.map -w ${KERNEL_VER}
(cd $PWD/out-modules && find . -name \*.ko | xargs aarch64-linux-strip --strip-unneeded)

Pack the kernel.img and resource.img:

wget https://raw.githubusercontent.com/friendlyarm/sd-fuse_rk3399/kernel-6.1.y/tools/mkkrnlimg && chmod 755 mkkrnlimg
wget https://raw.githubusercontent.com/friendlyarm/sd-fuse_rk3399/kernel-6.1.y/tools/resource_tool && chmod 755 resource_tool
wget https://raw.githubusercontent.com/friendlyarm/sd-fuse_rk3399/kernel-6.1.y/prebuilt/boot/logo.bmp
wget https://raw.githubusercontent.com/friendlyarm/sd-fuse_rk3399/kernel-6.1.y/prebuilt/boot/logo_kernel.bmp
./mkkrnlimg arch/arm64/boot/Image kernel.img
mkdir kernel-dtbs
cp -f arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dtb kernel-dtbs/rk3399-nanopi4-rev09.dtb
cp -f arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dtb kernel-dtbs/rk3399-nanopi4-rev0a.dtb
cp -f arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4se.dtb kernel-dtbs/rk3399-nanopi4-rev0b.dtb
cp -f arch/arm64/boot/dts/rockchip/rk3399-nanopc-t4.dtb kernel-dtbs/rk3399-nanopi4-rev00.dtb
./resource_tool --dtbname kernel-dtbs/*.dtb logo.bmp logo_kernel.bmp

After the compilation, the following files will be generated:

kernel.img

resource.img

The kernel modules are located in the out-modules directory

Run your build:
Please refre to #Running the build

17.4.6 Build u-boot v2017.09

This section applies to the following operating systems:

ubuntu-focal-desktop-arm64

debian-bullseye-desktop-arm64

debian-bullseye-minimal-arm64

friendlycore-focal-arm64

ubuntu-noble-core-arm64

debian-bookworm-core-arm64

buildroot

Clone the repository to your local drive then build:

git clone https://github.com/friendlyarm/rkbin --single-branch --depth 1 -b friendlyelec
git clone https://github.com/friendlyarm/uboot-rockchip --single-branch --depth 1 -b nanopi4-v2017.09
export PATH=/opt/FriendlyARM/toolchain/11.3-aarch64/bin/:$PATH
cd uboot-rockchip/
./make.sh nanopi4

After the compilation, the following files will be generated:

uboot.img

trust.img

rk3399_loader_v1.24.126.bin (aka MiniLoaderAll.bin)

Run your build:
Please refre to #Running the build

17.4.7 Running the build

17.4.7.1 Install to target board

17.4.7.1.1 MBR partition

This section applies to the following operating systems:

lubuntu

eflasher

friendlydesktop-arm64

friendlycore-arm64

The MBR partitioning is only used by the Linux v4.4 kernel. You can check the partition layout by clicking on this link: partmap. To write an image file, you can use the dd command. For example, in the parameter.template file, "0x00014000@0x00014000(kernel)" specifies that the kernel partition starts at 0x00014000, which is equivalent to 81920 in decimal. Therefore, the dd command should be as follows:

dd if=kernel.img of=/dev/mmcblk0 seek=81920

17.4.7.1.2 GPT partition

This section applies to the following operating systems:

ubuntu-focal-desktop-arm64	debian-bookworm-core-arm64	debian-bullseye-desktop-arm64	debian-bullseye-minimal-arm64
friendlycore-focal-arm64	ubuntu-noble-core-arm64	friendlywrt21-kernel4	buildroot
friendlywrt21	friendlywrt21-docker	friendlywrt23	friendlywrt23-docker

The OS uses GPT partitions by default which is using the Linux v4.19 and Linux v5.15 kernel, you can use the dd command, but be careful to choose the right output device:

• The SD/TF Card device node: /dev/mmcblk0
  
• The eMMC device node: /dev/mmcblk2
  

The following is an example of how to update the kernel to eMMC:
Use the 'parted' command to view the partition layout:

parted /dev/mmcblk2 print

Sample outputs:

Model: MMC BJTD4R (sd/mmc)
Disk /dev/mmcblk2: 31.3GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
 
Number  Start   End     Size    File system  Name      Flags
 1      8389kB  12.6MB  4194kB               uboot
 2      12.6MB  16.8MB  4194kB               trust
 3      16.8MB  21.0MB  4194kB               misc
 4      21.0MB  25.2MB  4194kB               dtbo
 5      25.2MB  41.9MB  16.8MB               resource
 6      41.9MB  83.9MB  41.9MB               kernel
 7      83.9MB  134MB   50.3MB               boot
 8      134MB   2500MB  2366MB  ext4         rootfs
 9      2500MB  31.3GB  28.8GB  ext4         userdata

as shown above, the resource partition is located at 5 and the kernel partition is located at 6. Use the dd command to write the resource.img and kernel.img files to these partitions, the commands are as follows:

dd if=resource.img of=/dev/mmcblk2p5 bs=1M
dd if=kernel.img of=/dev/mmcblk2p6 bs=1M

If you want to update u-boot:

dd if=uboot.img of=/dev/mmcblk2p1 bs=1M

To update new driver modules, copy the newly compiled driver modules to the appropriate directory under /lib/modules.

17.4.7.2 Packaging and creating an SD image

To create a new OS image file, you need to use the "sd-fuse" packaging tool.

"sd-fuse" is a collection of scripts that can be used to create bootable SD card images for FriendlyElec boards. Its main features include:

• Creation of root filesystem images from a directory
  
• Building of bootable SD card images
  
• Simple compilation of kernel, U-Boot, and third-party drivers
  

Please click on the following link to find out more:

Kernel version	Packaging Tool
linux v4.4.y	sd-fuse
linux v4.19.y	sd-fuse_rk3399/kernel-4.19
linux v6.1.y	sd-fuse_rk3399/kernel-6.1.y

17.4.7.3 USB flashing

Note: kernel v4.4.y is not supported

17.4.7.3.1 Linux

Reboot the board and enter loader mode with the following command:

sudo reboot loader

To flash U-Boot and kernel using the "upgrade_tool_v2.17_for_linux" tool, please use the following command:

sudo upgrade_tool di -k kernel.img
sudo upgrade_tool di -re resource.img
sudo upgrade_tool di -u uboot.img
sudo upgrade_tool RD

Note: "upgrade_tool" is a command-line tool provided by Rockchip for Linux operating systems (Linux_Upgrade_Tool).

17.5 Build the code using scripts

17.5.1 Download scripts and image files

git clone https://github.com/friendlyarm/sd-fuse_rk3399.git -b kernel-4.19
cd sd-fuse_rk3399
wget http://112.124.9.243/dvdfiles/RK3399/images-for-eflasher/friendlycore-focal-arm64-images.tgz
tar xvzf friendlycore-focal-arm64-images.tgz

17.5.2 Compile the kernel

Download the kernel source code and compile it. the relevant image files in the friendlycore-focal-arm64 directory will be automatically updated, including the kernel modules in the file system:

git clone https://github.com/friendlyarm/kernel-rockchip --depth 1 -b nanopi4-v4.19.y kernel-rk3399
KERNEL_SRC=$PWD/kernel-rk3399 ./build-kernel.sh friendlycore-focal-arm64

17.5.3 Compile the kernel headers

git clone https://github.com/friendlyarm/kernel-rockchip --depth 1 -b nanopi4-v4.19.y kernel-rk3399
MK_HEADERS_DEB=1 BUILD_THIRD_PARTY_DRIVER=0 KERNEL_SRC=$PWD/kernel-rk3399 ./build-kernel.sh friendlycore-focal-arm64

17.5.4 Compile the uboot

Download the uboot source code and compile it. the relevant image files in the friendlycore-focal-arm64 directory will be automatically updated:

git clone https://github.com/friendlyarm/uboot-rockchip --depth 1 -b nanopi4-v2017.09
UBOOT_SRC=$PWD/uboot-rockchip ./build-uboot.sh friendlycore-focal-arm64

17.5.5 Generate new image

Repackage the image file in the friendlycore-focal-arm64 directory into sd card image:

./mk-sd-image.sh friendlycore-focal-arm64

After the command is completed, the image is in the out directory, you can use the dd command to make the SD boot card, for example:

dd if=out/rk3399-sd-friendlycore-focal-4.19-arm64-YYYYMMDD.img of=/dev/sdX bs=1M

17.6 Building AOSP from source

17.6.1 Hardware and Software Requirements

• Your computer should have at least 16GB of RAM and 300GB of disk space. We recommend using a machine with 32GB of RAM and a large-capacity, high-speed SSD, and we do not recommend using virtual machines.
• If you encounter compilation errors, they may be caused by problems with the compilation environment. We recommend using the following Docker container for compilation: docker-cross-compiler-novnc.

17.6.2 Compile Android10

17.6.2.1 Download Android10 Source Code

There are two ways to download the source code:

• repo archive file on netdisk

Netdisk URL: Click here
File location on netdisk："07_Source codes/rk3399-android-10.git-YYYYMMDD.tar.xz" (YYYYMMDD means the date of packaging)
After extracting the repo package from the network disk, you need to execute the sync.sh script, which will pull the latest code from gitlab:

tar xf "/path/to/netdisk/07_Source codes/rk3399-android-10.git-YYYYMMDD.tar.xz"
cd rk3399-android-10
./sync.sh

• git clone from gitlab

SOM-RK3399 source code is maintained in gitlab, You can download it by running the following command:

git clone --recursive https://gitlab.com/friendlyelec/rk3399-android-10.git -b main

Note: If the following error "error: unknown option `recurse-submodules'" appears, please upgrade git to v2.0.0 or above.

17.6.2.2 Generate Image File

You can compile an Android source code and generate an image file (non-root user is recommended):

cd rk3399-android-10
./build-nanopc-t4.sh -F -M

If you need to include google apps, you need to set an environment variable and then compile, as shown below:

cd rk3399-android-10
export INSTALL_GAPPS_FOR_TESTING=yes
./build-nanopc-t4.sh -F -M

17.6.2.3 Make OTA Packages

If you need the support of A/B (Seamless) System Updates, you need to do the following:
a) Build your own update server for http download of update files;
b) Customize the Updater application, the code is located in packages/apps/Updater, let it connect and download file from your server;
c) Use the quick compilation script parameter -O or --ota to compile OTA Packages, as shown below:

cd rk3399-android-10
./build-nanopc-t4.sh -F -O -M

After the compilation is successfully completed, the OTA update related packages are located in the directory: rockdev/otapackage/ ，Please do not delete this directory.
After you have made some changes, compiling again with the parameter -O will generate ota-update-XXXXXXXX.zip, which is an incremental update package.
OTA Packages decides whether to generate incremental update package according to BUILD_NUMBER, for details, please refer to build-nanopc-t4.sh.
To disable the A/B feature, you can refer to the following to modify device/rockchip/rk3399/nanopc-t4/BoardConfig.mk, and then recompile uboot and android:

BOARD_USES_AB_IMAGE := false

17.6.2.4 Update System with New Image

After compilation is done a new image file will be generated in the "rockdev/Image-nanopc_t4/" directory under Android 10's source code directory. You can follow the steps below to update the OS in SOM-RK3399:
1) Insert an SD card which is processed with EFlasher to an SD card reader and insert this reader to a PC running Ubuntu. The SD card's partitions will be automatically mounted;
2) Copy all the files under the "rockdev/Image-nanopc_t4/" directory to the SD card's android10 directory in the "FRIENDLYARM" partition;
3) Insert this SD card to SOM-RK3399 and reflash Android
When flashing Android 10, EFlasher requires v1.3 or above. When flashing with Type-C, please use the tool AndroidTool v2.71 or Linux_Upgrade_Tool v1.49 provided by Rockchip.

17.6.3 Compile Android8.1

17.6.3.1 Download Android8.1 Source Code

There are two ways to download the source code:

• repo archive file on netdisk

Netdisk URL: Click here
File location on netdisk：sources/rk3399-android-8.1.git-YYYYMMDD.tgz (YYYYMMDD means the date of packaging)
After extracting the repo package from the network disk, you need to execute the sync.sh script, which will pull the latest code from gitlab:

tar xvzf /path/to/netdisk/sources/rk3399-android-8.1.git-YYYYMMDD.tgz
cd rk3399-android-8.1
./sync.sh

• git clone from gitlab

SOM-RK3399 source code is maintained in gitlab, You can download it by running the following command:

git clone https://gitlab.com/friendlyelec/rk3399-android-8.1 --depth 1 -b master

17.6.3.2 Generate Image File

You can compile an Android source code and generate an image file:

cd rk3399-android-8.1
./build-nanopc-t4.sh -F -M

17.6.3.3 Update System with New Image

After compilation is done a new image file will be generated in the "rockdev/Image-nanopc_t4/" directory under Android 8.1's source code directory. You can follow the steps below to update the OS in SOM-RK3399:
1) Insert an SD card which is processed with EFlasher to an SD card reader and insert this reader to a PC running Ubuntu. The SD card's partitions will be automatically mounted;
2) Copy all the files under the "rockdev/Image-nanopc_t4/" directory to the SD card's android8 directory in the "FRIENDLYARM" partition;
3) Insert this SD card to SOM-RK3399 and reflash Android
Here is an alternative guide to update OS: sd-fuse_rk3399

17.6.4 Compile Android7

17.6.4.1 Download Android7 Source Code

There are two ways to download the source code:

• repo archive file on netdisk

Netdisk URL: Click here
File location on netdisk：sources/rk3399-android-7.git-YYYYMMDD.tgz (YYYYMMDD means the date of packaging)
After extracting the repo package from the network disk, you need to execute the sync.sh script, which will pull the latest code from gitlab:

tar xvzf /path/to/netdisk/sources/rk3399-android-7.git-YYYYMMDD.tgz
cd rk3399-nougat
./sync.sh

• git clone from gitlab

SOM-RK3399 source code is maintained in gitlab, You can download it by running the following command:

git clone https://gitlab.com/friendlyelec/rk3399-nougat --depth 1 -b nanopc-t4-nougat

17.6.4.2 Generate Image File

You can compile an Android7 source code and generate an image file:

cd rk3399-nougat
./build-nanopc-t4.sh -F -M

17.6.4.3 Update System with New Image

After compilation is done a new image file will be generated in the "rockdev/Image-nanopc_t4/" directory under Android7's source code directory. You can follow the steps below to update the OS in SOM-RK3399:
1) Insert an SD card which is processed with EFlasher to an SD card reader and insert this reader to a PC running Ubuntu. The SD card's partitions will be automatically mounted;
2) Copy all the files under the "rockdev/Image-nanopc_t4/" directory to the SD card's android8 directory in the "FRIENDLYARM" partition;
3) Insert this SD card to SOM-RK3399 and reflash Android
Here is an alternative guide to update OS: sd-fuse_rk3399

18 Using On-Board Hardware Resources

18.1 Access Serial Interface

For now only UART4 is available for users:

Serial Interface	Serial Device
UART0	Used by Bluetooth
UART1	Used by Gbps Ethernet
UART2	Used by Serial Debug Port
UART3	Used by Gbps Ethernet
UART4	Available, device name is /dev/ttyS4 (note: this is only applicable for ROM released after 20180618)

19 Backup rootfs and create custom SD image (to burn your application into other boards)

19.1 Backup rootfs

Run the following commands on your target board. These commands will back up the entire root partition:

sudo passwd root
su root
cd /
tar --warning=no-file-changed -cvpzf /rootfs.tar.gz \
    --exclude=/rootfs.tar.gz --exclude=/var/lib/docker/runtimes \
    --exclude=/etc/firstuser --exclude=/etc/friendlyelec-release \
    --exclude=/usr/local/first_boot_flag --one-file-system /

Note: if there is a mounted directory on the system, an error message will appear at the end, which can be ignored.

19.2 Making a bootable SD card from a root filesystem

Run the following script on your Linux PC host, we'll only mention "debian-bullseye-desktop-arm64 os" for brevity, but you can apply the same process for every linux OS.

su root
git clone https://github.com/friendlyarm/sd-fuse_rk3399 --single-branch -b kernel-4.19
cd sd-fuse_rk3399
tar xvzf /path/to/netdrive/03_Partition\ image\ files/debian-bullseye-desktop-arm64-images.tgz
tar xvzf /path/to/netdrive/03_Partition\ image\ files/emmc-eflasher-images.tgz
scp pi@BOARDIP:/rootfs.tar.gz /rootfs.tar.gz
mkdir rootfs
tar xvzfp rootfs.tar.gz -C rootfs --numeric-owner --same-owner
./build-rootfs-img.sh rootfs debian-bullseye-desktop-arm64
./mk-sd-image.sh debian-bullseye-desktop-arm64
./mk-emmc-image.sh debian-bullseye-desktop-arm64 autostart=yes

20 Configuring kernel command line parameters (only support for kernel4.4)

20.1 eMMC Boot

Here are the steps:
Make an eflahser bootable SD card (use the firmware file starting with rk3xxxx-eflasher-)，
Insert the SD card into your computer, go to the SD card's OS-related directory, and edit the file parameter.txt, which is a text file containing command-line parameters，
Then boot from the SD card and burn the system to the eMMC.

20.2 SD Boot

To modify the command line parameters of the SD card, you need to repackage the SD card image file,
you can use the sd-fuse script we provide to assist packaging:

git clone https://github.com/friendlyarm/sd-fuse_rk3399.git -b master --single-branch
cd sd-fuse_rk3399
tar xvzf /path/to/netdrive/03_Partition\ image\ files/friendlydesktop-arm64-images.tgz
tar xvzf /path/to/netdrive/03_Partition\ image\ files/emmc-flasher-images.tgz
vim friendlydesktop-arm64/parameter.txt   # Edit command-line parameters
./mk-sd-image.sh friendlydesktop-arm64    # Repackage sd image file
./mk-emmc-image.sh friendlydesktop-arm64  # Repackage sd-to-emmc image file

21 Common Linux-based operating system operations

21.1 Using ADB on Linux Systems

21.1.1 Enabling ADB in Buildroot System

Enable on Startup

mv /etc/init.d/K50usbdevice.sh /etc/init.d/S50usbdevice.sh
reboot

Enable Temporarily

usbdevice-wrapper start

21.1.2 Enabling ADB in Ubuntu and Debian Systems

Enable on Startup

sudo systemctl enable usbdevice
sudo reboot

Enable Temporarily

usbdevice-wrapper start

21.1.3 How to Connect

When using ADB, the port connected to the computer is the same as the USB flashing port.

21.2 Install Kernel Headers

To install the .deb file located in the /opt/archives directory:

sudo dpkg -i /opt/archives/linux-headers-*.deb

To download and update the kernel header files online:

wget http://112.124.9.243/archives/rk3399/linux-headers-$(uname -r)-latest.deb
sudo dpkg -i ./linux-headers-latest.deb

You can visit http://112.124.9.243/archives/rk3399 to see which kernel deb packages are available.

21.3 Setting Kernel Boot Parameters (eMMC Only)

Flash the firmware file XXXX-eflasher-multiple-os-YYYYMMDD-30g.img.gz to a TF card, then insert the TF card into your computer. Windows will usually recognize the TF card partition automatically (formatted as exFAT). For Linux or Mac users, manually mount the first partition of the TF card. Assuming the TF card’s device name is /dev/sdX, mount /dev/sdX1.

Edit the info.conf configuration file in the OS directory on the TF card, adding the bootargs-ext parameter. For example:

bootargs-ext=rockchipdrm.fb_max_sz=2048

To remove a specified parameter, set it to empty. For example, to remove the userdata parameter:

bootargs-ext=userdata=

After editing, use this TF card to flash the system to eMMC.

To set kernel boot parameters during the creation of a mass production card, refer to the following script (example for RK3588): https://github.com/friendlyarm/sd-fuse_rk3588/blob/kernel-6.1.y/test/test-custom-bootargs.sh

22 More OS Support

22.1 DietPi

DietPi is a highly optimised & minimal Debian-based Linux distribution. DietPi is extremely lightweight at its core, and also extremely easy to install and use.
Setting up a single board computer (SBC) or even a computer, for both regular or server use, takes time and skill. DietPi provides an easy way to install and run favourite software you choose.
For more information, please visit this link https://dietpi.com/docs/.

DietPi supports many of the NanoPi board series, you may download the image file from here:

• https://dietpi.com/docs/hardware/#nanopi-series-friendlyarm
  

23 Link to Rockchip Resources

• Link to Rockchip's resources: https://gitlab.com/friendlyelec/rk3399-nougat/tree/nanopc-t4-nougat/RKDocs
• RK3399 datasheet V2.1
• RK3399TRM V1.4

24 Schematic, PCB CAD File

• SOM-RK3399_1904_Schematic.pdf
• SOM-RK3399_1904_dxf.zip
• SOM-RK3399_Dev_Kit_1904_Schematic.pdf
• SOM-RK3399_Dev_Kit_1904_dxf.zip

25 Update Log

25.1 2024-04-21

25.1.1 OpenMediaVault

• Update to 7.0.5-1
• Update to Debian12

25.2 2024-03-15

25.2.1 Ubuntu focal desktop

• Fix the bluetooth issue

25.3 2024-01-31

25.3.1 Debian/Ubuntu/FriendlyCore/Buildroot

• Add adb support

25.4 2023-12-01

25.4.1 FriendlyWrt

• Update to kernel 6.1.63
• Update to openwrt-23.05.2

25.5 2023-10-31

25.5.1 Add a new system

• Add NAS system OpenMediaVault, base on Debian 11 with kernel 6.1

25.5.2 Debian Core/FriendlyCore-Lite-Core

• Update to kernel 6.1

25.5.3 FriendlyWrt

• Update to kernel 6.1
• Update to openwrt-23.05

25.6 2023-07-01

25.6.1 Debian11

• Update to the latest Rockchip sdk version, improve xserver and video playback performance
• Fix some known issues

25.7 2023-05-26

25.7.1 FriendlyWrt

• Updated v22.03 to openwrt-22.03.5
• Updated v21.02 to openwrt-21.02.7

25.8 2023-05-21

25.8.1 Debian11:

• Update to Rockchip sdk version linux-5.10-gen-rkr4
• Switch desktop to LXDE

25.9 2023-04-26

25.9.1 FriendlyWrt：

• Upgrade v22.03 to openwrt-22.03.4
• Upgrade v21.02 to openwrt-21.02.6

25.10 2023-02-10

25.10.1 Added Debian11

There are three versions:

• Debian11 Core: Command-line only
• Debian11 Minimal: With Xfce desktop, lite version
• Debian11 Desktop: With Xfce desktop, full version

25.11 2023-01-09

25.11.1 FriendlyCore：

• optimized the systemd service

25.12 2022-12-04

25.12.1 FriendlyWrt：

• Fix the issue that the storage space cannot be expanded
• Improve stability of the eMMC Tools

25.13 2022-09-06

25.13.1 FriendlyWrt：

• Improved eMMC read performance of NanoPi-R4SE
• Added Fullcone NAT support
• upgrade to 22.03.0
• Fix NanoPC-T4 eMMC stability issue

25.14 2022-08-19

25.14.1 Lubuntu/Android8/FriendlyDesktop：

• Add support for 7" screen HD703E
• Fixed FriendlyDesktop not booting from eMMC

25.14.2 Buildroot：

• Fix the issue of Som-RK3399 not loading WiFi module automatically

25.15 2022-08-03

25.15.1 FriendlyWrt：

• Upgrade FriendlyWrt to the latest version 22.03-rc6
• Fixed the problem that the R4S/R4SE may not recognize the pcie device (lan port) after a soft reboot (small probability)
• Fixed the issue where the R4SE status led did not reflect the burn progress when burning the system to eMMC
• Firewall settings adjustment: single-port devices (e.g. NanoPi-T4/NanoPi-M4) are set to allow WAN inbound traffic by default for easy web configuration, while multi-port devices are still denied WAN inbound traffic by default
• Updated FriendlyWrt firmware with 4.19 kernel to match FriendlyWrt 21.02 docker with 5.15 kernel

25.16 2022-07-27

25.16.1 FriendlyWrt:

• Beta version 22.03-rc3 is available, you can choose according to your package requirements, stable version 21.02.3 is recommended.
• Both docker and non-docker versions are available, all features are the same except for docker.
• Improved compatibility issues with third-party packages
• Added support for "Soft Factory Reset" function
• Added web-based tool eMMC-Tools, support install FriendlyElec and some third party firmware to eMMC, besides raw-image also support rockchip package format firmware
• Other details: default timezone setting to Shanghai, new NAS category menu, remove lcd2usb, improve security settings, tune sysctl parameters, fix docker firewall settings, etc.
• Add support for new hardware model: NanoPi-R4SE

25.17 2022-07-04

25.17.1 Debian 10(buster) Desktop (New)

• Uses LXDE as default desktop
• Pre-installed mpv, smplayer and chromium brower
• Supports hardware acceleration

25.18 2021-12-02

• Fixed the issue that some sd cards would cause the reboot command and watchdog not work (updated uboot v2017.09)

25.19 2021-10-29

25.19.1 FriendlyWrt：

• FriendlyWrt has been updated to the official stable version 21.02.1, features are basically the same as 19.07.5, support docker, usb wifi, etc.

25.19.2 Friendlycore-Focal

• Updated rockchip's video encoding/decoding (mpp) support
• Updated camera support, integrated rkisp_3A_server, after running it camera preview can use v4l2src directly, usage examples are as follows:

     rkisp_3A_server --mmedia /dev/media0 &
     gst-launch-1.0 v4l2src device=/dev/video1 io-mode=4 ! \
       video/x-raw,format=NV12,width=1280,height=720,framerate=30/1 ! queue ! kmssink

• Fix the issue that gst-camera.sh previews HDMI IN with errors

25.20 2021-08-31

25.20.1 FriendlyWrt：

• Upgraded kernel to 5.10.60
• Add a high-speed 5G USB WiFi support, the network card model is Comfast CF-WU782AC V2, the chip model is MediaTek MT7662
• Improved USB WiFi compatibility
• Improved PWM fan support, fan controlled by kernel drive, temperature control support（Please search for "PWM fans" on the R4S WiKi page for details)
• Improved stability on first boot (previous version, bpfilter error occurred in some cases on first boot)

25.21 2021-03-11

25.21.1 FriendlyWrt：

• Update FriendlyWrt's kernel to 5.10

25.22 2020-12-24

25.22.1 FriendlyWrt:

• FriendlyWrt has been updated to the official stable version 19.07.5

25.23 2020-12-17

25.23.1 FriendlyWrt:

1) FriendlyWrt provides two versions, using 4.19 kernel and 5.4 kernel, 5.4 is for R4S, other models please use 4.19 version
2) Improve the compatibility of the software package

25.23.2 FriendlyCore/FriendlyDesktop:

Update wiringPi to support more pins

25.24 2020-10-27

• Add new OS: FriendlyCore 20.04：

1) Linux kernel version: 4.19.111
2) Base on Ubuntu 20.04, keep the original features of FriendlyCore such as Qt5, OpenCV, WiringPi, etc. ffmpeg/mpv is not currently supported
3) U-Boot version: 2017.09
4) Integrate Rockchip's latest GPU, video codec, and Camera support

25.25 2020-09-27

25.25.1 Android 10:

• Add Supported for A/B (Seamless) System Update

25.26 2020-09-16

• Android 10：

1) Update SDK to Rockchip android-10.0-mid-rkr9
2) HDMI enable more resolution options
3) Fix the problem of no display on DisplayPort
4) Update the Bluetooth firmware to fix the issue that the NanoPi M4B cannot enable Bluetooth
5) Fix the logo display issue

• FriendlyCore/FriendlyDesktop：

1) Update the Bluetooth firmware and fix the issue that the Bluetooth firmware was not successfully loaded
2) Update bcmdhd driver to 1.579.77.41.22
3) Fixed the issue that the permissions of the /tmp/ directory were modified to read-only

25.27 2020-08-17

1) Optimized the steps and stability of installing the system through typc-c. AndroidTool and configuration files are preset for each system's compressed package, and there is no need to manually load files (Note: When changing the OS type in EMMC, you still need to wipe In addition to Flash, then burn the new OS);
2) Fixed the issue that the FriendlyWrt serial port could not be logged in;

25.28 2020-07-10

• Android 10：

1) Enable HDMI IN audio input and headphone port audio output by default for SOM-RK3399
2) Added support for 2 USB cameras to work together, Camera application can switch the front/rear camera preview
3) Pre-installed browser Chrome and input method Gboard

25.29 2020-06-23

• Add new OS: Android 10, the main features are as follows:

1) base on android-10.0-mid-rkr8：
- AOSP: android-10.0.0_r32
- Linux version 4.19.111
- U-Boot 2017.09
2) Support MIPI-CSI camera and USB camera
3) Support HDMI IN video input
4) Built-in Google Play
5) Built-in Lightning Browser
6) Enabled dynamic partitions
7) Built-in FriendlyThings demo
8) Built-in Quectel EC20 driver
9) Support RC-100 infrared remote control
10) Provides Settings to automatically hide navigation bars
11) Update tools:AndroidTool_Release_v2.71.zip,Linux_Upgrade_Tool_v1.49.zip

• Android8：

Provides Settings to automatically hide navigation bars

25.30 2020-03-24

1) Update Android8.1_SDK to Rockchip official version v8.32_20200218
2) Upgrade OpenCV to 4.2
3) Upgrade OpenWrt to 19.07.1
4) DDR loader updated to 1.24, support multiple frequency set points
5) Improved camera driver stability
6) Optimization of kernel stability

25.31 2019-12-27

• FriendlyCore/FriendlyDesktop：

1) Pre-installed wiringPi for python3, non-root users can access hardware resources such as gpio
2) Fixed virtual env permissions for pi user
3) Fixed /tmp directory permissions
4) Updated kernel configuration, improved docker compatibility

• FriendlyWrt：

Upgrade to OpenWrt r19-snapshot 64bit, support Docker CE

• eflasher：

1) Supports flashing only some files, such as updating only the kernel and uboot in emmc
2) Added gui option to disable overlay filesystem
3) Add command line parameters to achieve one-click installation without interaction
4) Fix the issue that the same mac address will appear on different devices after backup and restore image
5) UI interface can now be configured with title, hide interface menus and buttons

25.32 2019-09-26

• FriendlyCore/FriendlyDesktop：

Fix Qt5 demo touch screen related issue

25.33 2019-09-03

• Android 8.1：

1) Upgrade Android8.1_SDK to Rockchip v8.20_20190801 (Kernel: 4.4.167)
2) Increase the recording volume by 15dB
3) Fixed an issue where some HDMI display scales were not displayed correctly
4) USB Host: Enable DWC3's AutoRetry feature to improve the stability of some USB3.0 industrial cameras

• FriendlyCore/FriendlyDesktop：

1) Merge the official kernel update and upgrade the kernel to 4.4.179
2) USB Host: Enable DWC3's AutoRetry feature to improve the stability of some USB3.0 industrial cameras
3) Fixed HDMI IN issue

• Buildroot：

1) Upgrade Buildroot's version to Rockchip_v2.2.0_20190628
2) Merge the official kernel update and upgrade the kernel to 4.4.179
3) Fix bluetooth issue

25.34 2019-07-18

• FriendlyCore/FriendlyDesktop/Lubuntu：

1) Modify SDIO's maximum frequency to 150M to improve Wi-Fi performance
2) Fixed some unrecognized problems with NVMe M.2 SSDs, improving compatibility

• Android 8

1) Modify SDIO's maximum frequency to 150M to improve Wi-Fi performance
2) Bluetooth BLE enabled

25.35 2019-06-25

Linux(Ubuntu 16.04/18.04) uses OverlayFS to enhance filesystem stability.

25.36 2019-05-23

• Ubuntu 18.04(FriendlyCore, FriendlyDesktop)：

1) Fix the Pulseaudio issue
2) Fix the Bluetooth issue

25.37 2019-05-11

• Android 8.1:

1) Added support for PWM fan, support fan speed control
2) Add SSD support (Note: SSD partition needs to be ext4 format)

• FriendlyCore, FriendlyDesktop:

1) Kernel version updated to v4.4.167
2) the isp driver of the camera is upgraded from cif_isp10 to rk_isp1, supporting dual mipi cameras to work at the same time
3) OpenCV is upgraded to the latest version 4.1, supporting dual mipi camera and USB camera (logitech C920)
4) 4G network support is added to the Linux system (module: Quectel EC20)
5) Add Aanopc-t4 PWM fan support

• EFlasher system:

1) Reduced file system size
2) The network configuration is changed from DHCP to static IP address (192.168.1.231)

25.38 2019-03-08

• Add Buildroot project：

Add Buildroot Linux system, based on Rockchip original RK3399 Linux SDK, project open source, please refer to the details：Buildroot

• Android 8.1 update is as follows:

1) Optimized LCD and HDMI screen rotation settings, support for command line operations (command: wm rotation 90)
2) Fix the problem that the microphone cannot sound after forcing the audio output to the headphones

• FriendlyCore, FriendlyDesktop, Lubuntu is updated as follows:

1) Kernel version updated to v4.4.154
2) Docker support
3) Kernel configuration items are optimized to enable more features and device drivers
4) Fixed an issue where USB WiFi could not be used
5) Fix the stability problem of ISP camera

25.39 2018-12-19

• Android 8.1 update is as follows:

1) Update the AOSP source version to Android8.1-SDK v5.00-20181109
2) Add HDMI resolution and HDMI overscan setting UI
3) Add audio output settings, you can set the default output to headphones or HDMI
4) Add OV13850 and wide dynamic OV4689 camera support

• FriendlyCore is updated as follows:

1) Added OV13850 and wide dynamic OV4689 camera support
2) Added ffmpeg support, provides static libraries and header files, supports 4K hardware decoding (does not support hardware encoding)
3) Added mpv player, supports 4K hardware decoding

• FriendlyDesktop is updated as follows:

1) Added OV13850 and wide dynamic OV4689 camera support
2) Add Chrome-browser browser, support web page 1080P hardware decoding, support WebGL
3) Added ffmpeg support, provides static libraries and header files, supports 4K hardware decoding (does not support hardware encoding)
4) Fix the volume adjustment Issue
5) Set the audio output channel to HDMI by default (can be modified by /etc/pulse/default.pa)
6) Optimize the local player, associated with the mp4 file
7) Automatically enable swap partitioning for NEO4
8) Fix the issue of hostapd related issues
9) Adjust DPMS settings, turn off automatic sleep by default

• Lubuntu updated as follows:

1) Added OV13850 and wide dynamic OV4689 camera support
2) Add Chrome-browser browser, support web page 1080P hardware decoding, support WebGL
3) Set the audio output channel to HDMI by default (can be modified by /etc/asound.conf)
4) Optimize the local hard disk player, associated with the local mp4 file, double-click the local video to start the local hard disk player playback (only mp4 files are supported)
5) Fixed some issues regarding the package error reported in the previous version
6) Adjust DPMS settings, turn off automatic sleep by default

25.40 2018-11-12

• Android 8.1 update is as follows:

1) Add support for USB-C display
2) Add support for 4G network, the model number of the support module is: Quectel EC20
3) Add Android hardware access library FriendlyThing for programming various hardware resources under Android, such as Uart, SPI, I2C, GPIO, etc.
4) Optimize kernel configuration to improve PCIe performance, and connect NVME SSD will have a large performance improvement
5) Integrate the Google Play app store
6) Improve the underlying support of the camera so that it can automatically adapt to vertical screen (HD702E) and landscape (HDMI)
7) Fix the problem that the partition table is abnormal when Android8 is connected to NVME SSD and Android8 cannot be started.

• Android 7.1 update is as follows:

1) Add support for 4G network, the model number of the support module is: Quectel EC20
2) Add Android hardware access library FriendlyThing for programming various hardware resources under Android, such as Uart, SPI, I2C, GPIO, etc.
3) Optimize kernel configuration to improve PCIe performance, and connect NVME SSD will have a large performance improvement
4) Improve the underlying support of the camera so that it can automatically adapt to vertical screen (HD702E) and landscape (HDMI)
5) Fix the problem that the partition table is abnormal when Android8 is connected to NVME SSD and Android8 cannot be started.

• FriendlyCore and FriendlyDesktop are updated as follows:

1) Added support for OV13850 camera, provides gsteamer plugin to support ISP
2) Add WiringPi support for C language programming to access hardware resources such as GPIO
3) Added WiringPi-Python support for Python programming access to hardware resources such as GPIO
4) Optimize kernel configuration to improve PCIe performance, and connect NVME SSD will have a large performance improvement

25.41 2018-09-21

• Added support for an eDP screen
• Linux has enabled PCI-E to Sata function (AHCI SATA support)
• SquashFS under Linux enables LZO/XZ/ZSTD compression support

25.42 2018-09-05

• Add new OS: Android 8.1, the main features are as follows:

1) Support 2 CAM1320 (OV13850) at the same time, you can choose to switch between before and after camera use
2) Support USB camera (1 way, can not be used simultaneously with CAM1320)
3) Support AndroidNN GPU acceleration solution, which provides general acceleration support for AI related applications developed with AndroidNN API
4) Integrate the Tensorflow Lite item identification demo provided by Rockchip: TfLiteCameraDemo (connect CAM1320 or USB camera before starting)
5) Integrated Lightning is the default browser application (Note: Android official does not provide Browser application by default)
6) Support RC-100 infrared remote control, support pull-down notification bar, screen capture
7) Support Android full disk encryption function, system partition has Verity enabled, when using adb, adb root; adb disable-verity command disable Verity
8) Support MTP function, after connecting Type-C, you can enter Settings -> Connected devices -> USB to select the corresponding function
9) Upgrade the kernel version to 4.4.126
10) Update the AOSP source to the version android-8.1.0_r41 and update the August security patch

• FriendlyCore adds Qt dual camera sample program: the example is located in /opt/dual-camera directory, run by run.sh (two USB cameras must be connected before starting, it is recommended to use Logitech C270 or Logitech C922 camera)
  
• FriendlyDesktop defaults to HDMI resolution of 1080P