Difference between revisions of "NanoPC-T4"

Revision as of 00:20, 3 August 2018

查看中文

1 Introduction

Overview

Front

Back

• The NanoPC-T4 is by far the smallest RK3399 based high-performance ARM board with popular ports and interfaces. Its software is fully open source. It is as small as 100 x 64 mm. It has 4GB LPDDR3 RAM, 16GB eMMC flash, onboard 2.4G & 5G dual-band WiFi module and a full standard M.2 PCIe interface which supports an NVME SSD high-speed hard drive. The NanoPC-T4 supports GPU and VPU acceleration and works with Android 7.1 and Lubuntu Desktop.

• The NanoPC-T4 has a MIPI-CSI dual camera interface, a MIPI-DSI and an eDP display interfaces, and an HDMI 2.0 interface. It has Type-C/DP, USB 3.0, USB2.0, MicroSD, Gbps Ethernet port, 3.5mm audio jack, infrared receiver, AD input, serial debug interface and a 40Pin RPi compatible connector.

• The RK3399 SoC has an internal Mali-T860 GPU which has powerful capabilities of processing 3D and HD H.265/H2.64 video streams. It supports dual camera inputs, dual ISP interface capable of doing image processing up to 13MPix/s. The NanoPC-T4 is a perfect platform for AI and deep learning applications. It can be widely used in advertisement machines, game machines, video conference applications, surveillance systems, clusters, VR/AR applications, machine vision applications 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, OpenVG1.1, 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, solfware power-down, RTC wake-up, system sleep mode
• RAM: Dual-Channel 4GB LPDDR3-1866
• 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, 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
• Audio Out: 3.5mm Dual channel headphone jack, or HDMI
• Audio In: Onboard microphone
• USB 2.0: 2 independent native USB 2.0 Host A interfaces
• USB 3.0: 1 native USB 3.0 Host A type interface
• USB Type-C: Supports USB3.0 Type-C and DisplayPort 1.2 Alt Mode on USB Type-C
• PCIe: One M.2 M-Key PCIe x4 socket, compatible with PCIe 2.1, Dual operation mode; Onboard M3 PCB nut for mounting M.2 2280 module
• microSD Slot x 1
• 40Pin GPIO Extension ports:
  • 3 X 3V/1.8V I2C, up to 1 x 3V UART, 1 X 3V SPI, 1 x SPDIF_TX, up to 8 x 3V GPIOs
  • 1 x 1.8V I2S, 3 x 1.8V GPIOs
• ADC: 3 x 1.8V ADC inputs, 5 Pin 2.54mm header
• Debug: one Debug UART, 4 Pin 2.54mm header, 3V level, 1500000bps
• Keys: PowerKey, Reset, MASKROM(BOOT), Recovery
• LED: 1 x power LED and 1 x GPIO Controlled LED
• IR reciver: Onboard IR reciver, Acceptes 38KHz carrier frequency
• RTC Battery: 2 Pin 1.27/1.25mm RTC battery input connector
• Cooling: two 2.5mm PCB nuts for mounting heat sink; 3 Pin 12V cooling fan interface with PWM
• Power supply: DC 12V/2A
• PCB: Ten Layer, 100 mm x 64 mm
• Ambient Operating Temperature: 0℃ to 80℃

3 Software Features

4 Diagram, Layout and Dimension

4.1 Layout

NanoPC-T4 Layout

• 40 Pin GPIO Pin Spec

Pin#	Assignment	Pin#	Assignment
1	VCC3V3_SYS	2	VCC5V0_SYS
3	I2C2_SDA(3V)	4	VCC5V0_SYS
5	I2C2_SCL(3V)	6	GND
7	GPIO1_A0(3V)	8	GPIO4_C1/I2C3_SCL(3V)
9	GND	10	GPIO4_C0/I2C3_SDA(3V)
11	GPIO1_A1(3V)	12	GPIO1_C2(3V)
13	GPIO1_A3(3V)	14	GND
15	GPIO1_A4(3V)	16	GPIO1_C6(3V)
17	VCC3V3_SYS	18	GPIO1_C7(3V)
19	SPI1_TXD/UART4_TX(3V)	20	GND
21	SPI1_RXD/UART4_RX(3V)	22	GPIO1_D0(3V)
23	SPI1_CLK(3V)	24	SPI1_CSn0(3V)
25	GND	26	GPIO4_C5/SPDIF_TX(3V)
27	I2C2_SDA(1.8V)	28	I2C2_SCL(1.8V)
29	I2S1_LRCK_RX(1.8V)	30	GND
31	I2S1_LRCK_TX(1.8V)	32	I2S_CLK(1.8V)
33	I2S1_SCLK(1.8V)	34	GND
35	I2S1_SDI0(1.8V)	36	I2S1_SDO0(1.8V)
37	GPIO3_D4(1.8V)	38	GPIO3_D5(1.8V)
39	GND	40	GPIO3_D6(1.8V)

• eDP Interface Pin Spec

Connector P/N: I-PEX-20455-030E

Pin#	Assignment	Description
1	GND	Signal ground
2	EDP_TX3N	eDP data lane 3 negative output
3	EDP_TX3P	eDP data lane 3 positive output
4	GND	Signal ground
5	EDP_TX2N	eDP data lane 2 negative output
6	EDP_TX2P	eDP data lane 2 positive output
7	GND	Signal ground
8	EDP_TX1N	eDP data lane 1 negative output
9	EDP_TX1P	eDP data lane 1 positive output
10	GND	Signal ground
11	EDP_TX0N	eDP data lane 0 negative output
12	EDP_TX0P	eDP data lane 0 positive output
13	GND	Signal ground
14	EDPAUXP	eDP CH-AUX positive differential output
15	EDPAUXN	eDP CH-AUX negative differential output
16	GND	Signal ground
17	VCC3V3_SYS	3.3V Power output for logic
18	VCC3V3_SYS	3.3V Power output for logic
19	I2C4_SDA	3V I2C data signal, Connect to touch panel
20	I2C4_SCL	3V I2C clock signal, Connect to touch panel
21	GPIO1_C4_TP_INT	3V interrupt input, Connect to the interrupt output of touch panel
22	GPIO1_B5_TP_RST	3V output for reseting touch panel, Connect to the reset input of touch panel
23	PWM0_BL	3V PWM output, for LCD backlight dimming
24	GPIO4_D5_LCD_BL_EN	3V output for turning on/off the LCD backlight
25	GND	Backlight ground
26	GND	Backlight ground
27	GND	Backlight ground
28	VCC12V0_SYS	12V Power output for Backlight Power
29	VCC12V0_SYS	12V Power output for Backlight Power
30	VCC12V0_SYS	12V Power output for Backlight Power

• MIPI-DSI Interface Pin Spec

0.5mm FPC connector

Pin#	Assignment	Description
1, 2, 3	VCC5V0_SYS	5V power output
4	GND	Return current path
5	I2C4_SDA	3V I2C data signal, Connect to touch panel
6	I2C4_SCL	3V I2C clock signal, Connect to touch panel
7	GND	Return current path
8	GPIO1_C4_TP_INT	3V interrupt input, Connect to the interrupt output of touch panel
9	GND	Return current path
10	PWM0_BL	3V PWM output, for LCD backlight dimming
11	GND	Return current path
12	GPIO4_D5_LCD_BL_EN	3V output for turning on/off the LCD backlight
13	GPIO4_D6_LCD_RST_H	3V output for reseting the LCD module
14	GPIO1_B5_TP_RST	3V output for reseting touch panel, Connect to the reset input of touch panel
15	GND	Return current path
16	MIPI_TX0_D3N	MIPI DSI negative differential data line transceiver output
17	MIPI_TX0_D3P	MIPI DSI positive differential data line transceiver output
18	GND	Return current path
19	MIPI_TX0_D2N	MIPI DSI negative differential data line transceiver output
20	MIPI_TX0_D2P	MIPI DSI positive differential data line transceiver output
21	GND	Return current path
22	MIPI_TX0_D1N	MIPI DSI negative differential data line transceiver output
23	MIPI_TX0_D1P	MIPI DSI positive differential data line transceiver output
24	GND	Return current path
25	MIPI_TX0_D0N	MIPI DSI negative differential data line transceiver output
26	MIPI_TX0_D0P	MIPI DSI positive differential data line transceiver output
27	GND	Return current path
28	MIPI_TX0_CLKN	MIPI DSI negative differential clock line transceiver output
29	MIPI_TX0_CLKP	MIPI DSI positive differential clock line transceiver output
30	GND	Return current path

• MIPI-CSI Interface Pin Spec

0.5mm FPC Connector

MIPI-CSI2 can be configured to MIPI-DSI

Pin#	MIPI-CSI1	MIPI-CSI2	Description
1	VCC5V0_SYS	VCC5V0_SYS	5V Power ouput
2	VCC5V0_SYS	VCC5V0_SYS	5V Power ouput
3	GND	GND	Return current path
4	VCC_CSI_AF2.8V	VCC_CSI_AF2.8V	2.8V Power for VCM
5	VCC_CSI_1.2V	VCC_CSI_1.2V	1.2V Power for image sensor core circuit
6	VCC1V8_CAM	VCC1V8_CAM	1.8V power for I/O circuit
7	VCC_CSI_2.8V	VCC_CSI_2.8V	2.8V power for image sensor analog circuit
8	VCC_CSI_1.0V	VCC_CSI_1.0V	1.0V Power for image sensor core circuit
9	I2C1_SCL	I2C2_SCL	1.8V I2C clock signal
10	I2C1_SDA	I2C2_SDA	1.8V I2C data signal
11	MIPI_CSI0_RST	MIPI_CSI1_RST	reset camera module
12	MIPI_CSI0_PWN	MIPI_CSI1_PWN	Power down camera module
13	GND	GND	Return current path
14	GPIO2_B3_CIF_CLKOUTA	GPIO2_B3_CIF_CLKOUTA	MCLK to camera module
15	GND	GND	Return current path
16	MIPI_RX0_D3P	MIPI_TX1/RX1_D3P	MIPI CSI positive differential data line transceiver output
17	MIPI_RX0_D3N	MIPI_TX1/RX1_D3N	MIPI CSI negative differential data line transceiver output
18	GND	GND	Return current path
19	MIPI_RX0_D2P	MIPI_TX1/RX1_D2P	MIPI CSI positive differential data line transceiver output
20	MIPI_RX0_D2N	MIPI_TX1/RX1_D2N	MIPI CSI negative differential data line transceiver output
21	GND	GND	Return current path
22	MIPI_RX0_D1P	MIPI_TX1/RX1_D1P	MIPI CSI positive differential data line transceiver output
23	MIPI_RX0_D1N	MIPI_TX1/RX1_D1N	MIPI CSI negative differential data line transceiver output
24	GND	GND	Return current path
25	MIPI_RX0_CLKP	MIPI_TX1/RX1_CLKP	MIPI CSI positive differential clock line transceiver output
26	MIPI_RX0_CLKN	MIPI_TX1/RX1_CLKN	MIPI CSI negative differential clock line transceiver output
27	GND	GND	Return current path
28	MIPI_RX0_D0P	MIPI_TX1/RX1_D0P	MIPI CSI positive differential data line transceiver output
29	MIPI_RX0_D0N	MIPI_TX1/RX1_D0N	MIPI CSI negative differential data line transceiver output
30	GND	GND	Return current path

• M.2 PCIe Pin Spec

PCIe Gen 2.1 x4

M.2 Key M Connector for Socket 2/Socket 3 PCIe-based Module, such as PCIe SSD

Connector P/N: MDT-420-M-01002

Pin#	Assignment	Description	Pin#	Assignment	Description
1	GND	Return current path	2	VCC3V3_SYS	3.3V Power output
3	GND	Return current path	4	VCC3V3_SYS	3.3V Power output
5	PCIE_RX3_N	PCIe differential data input signals	6	N/C	no connection
7	PCIE_RX3_P	PCIe differential data input signals	8	N/C	no connection
9	GND	Return current path	10	N/C	no connection
11	PCIE_TX3N	PCIe differential data output signals	12	VCC3V3_SYS	3.3V Power output
13	PCIE_TX3P	PCIe differential data output signals	14	VCC3V3_SYS	3.3V Power output
15	GND	Return current path	16	VCC3V3_SYS	3.3V Power output
17	PCIE_RX2_N	PCIe differential data input signals	18	VCC3V3_SYS	3.3V Power output
19	PCIE_RX2_P	PCIe differential data input signals	20	N/C	no connection
21	GND	Return current path	22	N/C	no connection
23	PCIE_TX2N	PCIe differential data output signals	24	N/C	no connection
25	PCIE_TX2P	PCIe differential data output signals	26	N/C	no connection
27	GND	Return current path	28	N/C	no connection
29	PCIE_RX1_N	PCIe differential data input signals	30	N/C	no connection
31	PCIE_RX1_P	PCIe differential data input signals	32	N/C	no connection
33	GND	Return current path	34	N/C	no connection
35	PCIE_TX1N	PCIe differential data output signals	36	N/C	no connection
37	PCIE_TX1P	PCIe differential data output signals	38	DEVSLP/NC	internal pull up to VCC3V3_SYS with 10K
39	GND	Return current path	40	I2C2_SCL	1.8V I2C clock signal
41	PCIE_RX0_N	PCIe differential data input signals	42	I2C2_SDA	1.8V I2C data signal
43	PCIE_RX0_P	PCIe differential data input signals	44	GPIO2_A2_PCIE_ALERT#	1.8V GPIO signal
45	GND	Return current path	46	N/C	no connection
47	PCIE_TX0N	PCIe differential data output signals	48	N/C	no connection
49	PCIE_TX0P	PCIe differential data output signals	50	GPIO2_A4_PCIE_RESET#	1.8V GPIO signal
51	GND	Return current path	52	CLKREQ#/NC	internal pull down to GND with 0R
53	PCIE_REF_CLKN	differential reference clock out for PCIe peripheral	54	GPIO2_A3_PCIE_WAKE#	1.8V GPIO signal
55	PCIE_REF_CLKP	differential reference clock out for PCIe peripheral	56	N/C	no connection
57	GND	Return current path	58	N/C	no connection
59	Connector Key	Connector Key	60	Connector Key	Connector Key
60	Connector Key	Connector Key	61	Connector Key	Connector Key
62	Connector Key	Connector Key	63	Connector Key	Connector Key
64	Connector Key	Connector Key	65	Connector Key	Connector Key
66	Connector Key	Connector Key	67	N/C	no connection
68	RTC_CLKO_SOC	1.8V 32.768KHz clock output	69	N/C	no connection
70	VCC3V3_SYS	3.3V Power output	71	GND	Return current path
72	VCC3V3_SYS	3.3V Power output	73	GND	Return current path
74	VCC3V3_SYS	3.3V Power output	75	GND	Return current path

• ADC interface Pin Spec

ADC input rang : 0~1.8V

Pin#	Assignment
1	GND
2	VCC_1V8
3	ADC_IN0
4	ADC_IN2
5	ADC_IN3

• Cooling Fan interface Pin Spec

Connector P/N: BM03B-GHS-TBT

Pin#	Assignment	Description
1	GND	0V
2	12V	12V output ,controlled by GPIO4_C6/PWM1
3	GPIO2_A6_FAN_TACH	connect to tachometer output signal , or float

• Debug UART Pin Spec

3V level signals, 1500000bps

Pin#	Assignment	Description
1	GND	0V
2	VCC5V0_SYS	5V power output
3	UART2DBG_TX	output
4	UART2DBG_RX	intput

• Power Jack

• DC-12V/2A IN, 5.5*2.1mm Power Jack

• Power Key

Plug in 12V power at power jack, then press the Power Key ( > 0.5s ) to boot NanoPC-T4.

• USB Port

USB Type-C port has 2A overcurrent protection.

USB 3.0 port has 2A overcurrent protection.

Two USB 2.0 host port share 2A overcurrent protection.

• BOOT Key

Press BOOT key to prevent the board from eMMC booting, making the board enter MASKROM mode.

• RTC

RTC backup current is 27uA.

Connector P/N: Molex 53398-0271

Notes

1. The Power Jack is the only power input port. All power pins at other ports are output.
2. How to make T4 start automatically when power is plugged in
3. For more details refer to the document: NanoPC-T4-1802-Schematic.pdf

4.2 Board Dimension

For more details refer to the CAD document: NanoPC-T4_1802_Drawing(dxf).zip

5 Get Started

5.1 Essentials You Need

Before starting to use your NanoPC-T4 get the following items ready

• NanoPC-T4
• 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 Debug with Serial Pins

If you want to get T4's boot messages or access T4 remotely you can operate it by using its serial pins.

• Get a USB to serial adapter and connect it to a T4:

Pin#	T4's Serial Pins	USB to Serial Board
1	GND	GND
2	VCC5V0_SYS	NC (Not Connected) Note: if this is a FriendlyElec's Matrix USB2UART you need to turn off the "5V ON/OFF"
3	UART2DBG_TX	RX
4	UART2DBG_RX	TX

• If you connect a USB to Serial adapter to a PC running Linux it will usually be recognized as ttyUSB0. To find out the device name, run the following commands:

 dmesg | grep ttyUSB
 ls -l /dev/ttyUSB*

• On a PC running Linux install and run minicom, and set its configuration as follows(1500000 Bps, 8N1, N)

 sudo apt-get install minicom
 minicom -s

Note: RK3399's debug serial interface's default baud rate is 1500000. Some adapter may not be able to run at this rate. You need to find a working adapter.

5.3 Flash Image to eMMC

As for a RK3399 based ARM board developed by FriendlyELEC there are three ways to flash an image to eMMC:

• Use eflasher to make a bootable SD card and flash an image to eMMC with this card
• Use a Windows' utility "AndroidTool_Release_v2.42" provided by Rockchip to flash an image to eMMC with a Type-C cable
• Use a Linux utility Linux_Upgrade_Tool_1.27 provided by Rockchip to flash an image to eMMC with a Type-C cable

If you are not familiar with the two utilities provided by Rockchip or you don't have a Type-C cable we suggest you try the first method.

5.3.1 Download Image and Utilities

Visit download link to download image files and utilities.

5.3.2 Flash Image to eMMC with eflasher and SD card

• Get a 8G SDHC card;
• Download the "rk3399-eflasher-YYYYMMDD-XXXX.img.zip" and "win32diskimager" and extract them on a Windows PC;
• Run the "win32diskimager" utility as administrator, select your TF card, wanted file and click on "Write" to start flash the image to your TF card;
• After it is done take out the TF card and insert it to your T4's microSD slot;
• Connect a 12V/2A DC power cord and an HDMI monitor to your T4, press and hold the Power button for at least 1.5 seconds and you will see the PWR led is on and the image on SD card is booted. Around 15 seconds later the HDMI monitor will display a Window;
• Select your wanted OS with a USB mouse and click on "Next" to continue;
• After flashing is done press and release the Power button to shut down the system. After the PWR is off take out the TF card. Press and hold the Power button for at least 1.5 seconds the image will be booted from eMMC.

5.3.3 Flash Image under Windows with Type-C Cable

Visit download link to download Windows utilities and image files:

Here are the steps:

• Download DriverAssitant_v4.5.tgz, extract it and install it on a Windows PC;
• Download your wanted image from images-for-eflasher and extract it. For example the image for Android 7 is "android-nougat-images.tgz". You can ignore the "idbloader.img" and "info.conf" files.
• Download AndroidTool_Release_v2.42.7z, extract it and run AndroidTool.exe as administrator.
• Import a parameter.txt for sections and configure a file for each section if needed:

• Connect a 12V/2A DC power cord and an HDMI monitor to your T4, connect your T4 to a PC with a Type-C cable. Press and hold the Recovery button and the Power button for at least 1.5 seconds AndroidTools will prompt that a LOADER device is found

a) If eMMC hasn't been flashed with an image or the image inside is removed or damaged this eMMC will be recognized as a MASKROM device;
b) You can hold both the BOOT button and the Power button for at least 5 seconds to force the board to enter the MASKROM mode;
c) If your system shows "no device is found" you need to check if you have installed a driver or if your Type-C cable works and then try it again;
d) If your system is booted successfully you can run "reboot loader" on your board via adb or SSH and force your board to enter the LOADER mode.

• Click on "Run" to download your wanted image to eMMC. A while later after the image is flashed successfully your board will be rebooted automatically.

5.3.4 Flash Image to eMMC under Linux with Type-C Cable

Visit download link to download Windows utilities and image files

Linux_Upgrade_Tool is a Linux utility provided by Rockchip. You need to use it together with a Type-C cable. It can be used to install an image to eMMC, delete image files from eMMC, read from and write to eMMC and etc.

• Install upgrade_tool: download Linux_Upgrade_Tool_1.27.rar, extract it and set upgrade_tool's access right

 sudo cp upgrade_tool /usr/local/sbin
 sudo chown root:root /usr/local/sbin/upgrade_tool
 sudo chmod 0755 /usr/local/sbin/upgrade_tool

• Download your wanted image from images-for-eflasher and extract it. For example the image for Lubuntu is "lubuntu-desktop-images.tgz".
• Refer to the steps in "Flash Image to eMMC with AndroidTool" to boot your board and force it to enter either LOADER or MASKROM mode;
• Run the following commands to flash Lubuntu to eMMC and reboot your board:

 sudo upgrade_tool ul MiniLoaderAll.bin
 sudo upgrade_tool di -p parameter.txt
 sudo upgrade_tool di uboot uboot.img
 sudo upgrade_tool di trust trust.img
 sudo upgrade_tool di resource resource.img
 sudo upgrade_tool di kernel kernel.img
 sudo upgrade_tool di boot boot.img
 sudo upgrade_tool di rootfs rootfs.img
 sudo upgrade_tool RD

• If you want to flash Android 7 to eMMC you can download and extract its image file and run the following commands:

 sudo upgrade_tool ul MiniLoaderAll.bin
 sudo upgrade_tool di -p parameter.txt
 sudo upgrade_tool di uboot uboot.img
 sudo upgrade_tool di trust trust.img
 sudo upgrade_tool di misc misc.img
 sudo upgrade_tool di resource resource.img
 sudo upgrade_tool di kernel kernel.img
 sudo upgrade_tool di boot boot.img
 sudo upgrade_tool di recovery recovery.img
 sudo upgrade_tool di system system.img
 sudo upgrade_tool RD

If the image's MiniLoaderAll.bin has a different version or the image you want to flash to eMMC is different from the image that already exists in eMMC you need to delete the image file in eMMC and then flash your new image to it.
Boot your board and enter the LOADER mode, run the following commands to delete the image in eMMC. If a prompt shows "Download Boot Start" and it lasts for 10 seconds you need to press the Reset button and run the following commands again.

 sudo upgrade_tool EF MiniLoaderAll.bin

If it succeeds you will see a prompt showing "Erase flash ok."

5.4 Boot from SD Card

Get the following files from here download link:

• Get a 8G SDHC card and backup its data if necessary.
  

• Uncompress these files. Insert an SD card(at least 8G) into a Windows PC and run the win32diskimager utility 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.
  
• Insert this card into your board's boot slot and power on, If the PWR LED is on and LED1 is blinking this indicates your board has successfully booted.
  

6 Work with Android7

rk3399-android7-home

rk3399-android7-icons

FriendlyElec provides a full Android7.1 BSP for NanoPC-T4. The source code is hosted at gitlab.com and is open source. The BSP supports GPU and VPU hardware acceleration.

6.1 Navigate Android with Remote Control

The NanoPC-T4 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

6.2 Connect MIPI Camera to T4

FriendlyElec developed a MIPI camera CAM1320 for NanoPC-T4 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 NanoPC-T4's MIPI interface, boot your T4 to Android and start Android's camera app.

The NanoPC-T4 has two MIPI interfaces: one front camera and the other rear camera:

Interface	Camera Type(front or rear)
MIPI-CSI1	Android rear camera
MIPI-CSI2	Android front camera

6.3 Set HDMI Display

If your board is connected to an HDMI monitor and it runs Android you can go to "Settings -> Display -> HDMI" to make your setting.

HDMI Resolution	By default it is "Auto". You can set its resolution up to 4K
Screen Zoom	There will be four arrows you can click on to zoom in/out
HDMI Rotation	Set it landscape or portrait.

6.4 Rotate Display

Enter Android's Settings -> Display -> HDMI -> HDMI Rotation. It supports both landscape and portrait.

7 Work with FriendlyCore

7.1 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;

7.2 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 NanoPC-T4：

• 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

7.3 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:

7.4 Develop Qt Application

The Qt 5.10.0 FriendlyELEC ported for RK3399 supports the following plug-ins:KMS, EGLFS and XCB. All these three plug-ins support OpenGL ES and GPU hardware acceleration but in different ways:

• KMS - it calls Linux kernel's DRM interface to display
  
• EGLFS - it calls OpenGL ES interface to display
  
• XCB - it runs on X11 server and is integrated in X11 windows system
  

Three plug-ins support different Qt features and here is a table:

Plug-in	OpenGL ES	QtWebEngine	QtMultimedia	Video Playing with Hardware Decoding	Different Display
KMS	Yes	No	Yes	No	Yes
EGLFS	Yes	No	Yes	No	No
XCB	Yes	Yes	Yes	Yes	Yes

We recommend to use KMS or XCB.

FriendlyCore has four scripts for setting Qt environmental variables for users and here is a table:

Script	Comment
/usr/bin/setqt5env-kms	set kms' environmental variables
/usr/bin/setqt5env-eglfs	set eglfs' environmental variables
/usr/bin/setqt5env-xcb	set xcb's environmental variables
/usr/bin/setqt5env-nogui	set environmental variables for a system without a Qt GUI

For instance, if you want to use KMS to display you can run the following commands:

. setqt5env-kms
./apps

(Note:there is a space between '.' and 's')

7.4.1 Setup Qt Development Envronment

FriendlyELEC developed two methods for RK3399 to cross-compile a Qt program:

• 1:Use Docker. For more details you can refer to github :http://github.com/friendlyarm/friendlyelec-ubuntu18-docker
• 2:Setup a local cross-compiler. You need to run a Ubuntu 18.04 64-bit OS and you can refer to :How to Build and Install Qt Application for FriendlyELEC Boards/zh

7.4.2 Qt Demo

FriendlyCore has several Qt demo programs:

• Qt QML: CinematicExperience

CinematicExperience is a utility for selecting a video file and it is developed with Qt QML.
This demo uses Qt QML's various features and runs very smoothly on RK3399. This performance is achieved by hardware and software optimization.
You can start it in a commandline utility by running the following commands:

cd /opt/Qt5_CinematicExperience
./run.sh

Here is what it looks like:

• QQt WebEngine: web browser

Qt WebEngine uses Chromium and supports HTML5.
You can start it by running the following commands:

cd /opt/qt5-brower
./run.sh

Here is what it looks like:

Note:Qt WebEngine depends on the Xcb plug-in.

• Qt Different Display

This demo shows that when a board is connected to an HDMI monitor and an eDP LCD these two devices display differently. You can start it by running the following commands:

cd /opt/qt5-multi-screen-demo
./run.sh

Here is what it looks like:

• Qt Multimedia: qt5-player with hard decoding

The qt5-player works with Rockchip's gstreamer plug-in and supports 4K video playing. Since Rockchip's plug-in only supports output images to an X11 window the qt5-player needs to use XCB for display.
You can start the demo by running the following commands:

cd /opt/qt5-player
./run.sh

Here is what it looks like. You can set it to display in full-screen and adjust the voice's volume:

• Qt WebGL demo: nmapper

Qt WebGL allows you to remotely access a Qt program running on your board.
Before you run the demo you need to connect your board to the internet and run the following commands:

cd /opt/qt5-nmapper
./run-with-webgl.sh

You can open a browser on another device, type the IP address of your board on the browser's address bar, enter and you will be able to see a Qt GUI. Here is what it looks like:

• Qt VNC demo: Smart home applicance GUI

Qt VNC allows you to run a program as a VNC Server on your board and you can access the program from a VNC client on another device. This program can be developed with either QtWidgets or QML.
You can start it by running the following commands:

cd /opt/qt5-smarthome
./run-with-vnc.sh

Start a VNC viewer on a smart phone or mobile device and type your board's IP address and port number 5900. For instance if your board's IP address is 192.168.1.100 you can type "192.168.1.100:5900", enter and you will see the following GUI:

7.4.3 Play with Dual Cameras under Qt

This sample shows how to connect dual cameras to the board and play with them. Before run the sample make sure you connect dual cameras and an LCD to your board. In general popular UVC cameras should work however we suggest users use the following modules which we have tested:

Index	Model
1	Logitech C270
2	Logitech C270i
3	Logitech C922 Pro

Run the following commands:

cd /opt/dual-camera
./run.sh

Here is what you expect to observe:

7.5 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.

7.6 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

7.7 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

7.8 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.

7.9 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。

7.10 WiringPi and Python Wrapper

• WiringPi for RK3399
• WiringPi-Python for RK3399

7.11 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

7.12 Modify timezone

For exampe, change to Shanghai timezone:

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

7.13 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.

7.14 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

8 Work with Lubuntu

8.1 Introduction to Lubuntu

Arduino

Website

Website

LUbuntu is a light-weighted Ubuntu desktop system. It is based on LXDE and has the following features:
    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 & neat － its desktop is based on GTK+ 2 and 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.

The Lubuntu Desktop has been optimized for adopting Mali GPU. It has driver support for X.org and supports Hardware Cursor, OpenGL acceleration and etc.

8.2 Lubuntu Default User Account

Non-root User:

   User Name: pi
   Password: pi

Root:

   User Name: root
   Password: fa

8.3 OpenGL ES

Open a command line utility and run the following command:

glmark2-es2

8.4 Video Playing with Hardware Decoding

8.4.1 Video Playing with Qt Player

Lubuntu is preinstalled with Qt5-Player which has Rockchip's gstreamer plug-in and supports playing 4K video stream. Here are the steps to start it:
On Lubuntu's main window open "Other" and click on Qt5-Player

Here is how this player looks like. It can display in full screen. You can adjust its volume:

8.4.2 Video Playing with Commandline Utility

Open a commandline utility and type the following command:

gst-player.sh

Your selected video file will be played in Overlay and its voice will be output to the earphone. You can use "which gst-player.sh" to locate this script and customize it.

8.5 eDP LCD Rotation

If your board is connected to an eDP LCD and you want to rotate its display by 90/180/270 degrees you can do it with "xrotate.sh". You can run the following command as root to rotate its display by 90 degrees clockwise. It will start the lightdm service to make it effective:

sudo xrotate.sh -m UD -r

You can get more details by running "xrotate -h".
However this command cannot rotate HDMI display. If you want to rotate HDMI display you may need to make changes in "/etc/X11/xorg.conf"

8.6 Connect USB Camera to T4

Connect a USB camera (e.g. Logitech C270) to T4, start Lubuntu, enter the "Other" menu, start "xawtv" and you will be able to preview with the camera.

8.7 5G WiFi

Click on the network icon on top right of the Lubuntu GUI, select a WiFi hotspot and proceed with prompts.

8.8 Develop Qt Application

Lubuntu has Qt 5.10.0 which can be used to develop an X11 application. For details about SDK download and compilation refer to :How to Build and Install Qt Application for FriendlyELEC Boards

8.9 Connect NVME SSD High Speed Hard Disk to T4

Connect a NVME SSD hard disk to NanoPC-T4's M.2 interface, initialize and automatically mount the SSD by running the following commands. Before proceed turn off your T4 and connect an SSD to your T4. Power on your T4 and open a command line utility(go to top left of the GUI and enter System Tools -> LXTerminal) or SSH to your T4.

We suggest you switch to "root" by running the following command:

su -

The password for "root" is "fa".

8.9.1 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 by T4.

8.9.2 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.

8.9.3 Format Section to EXT4

After an SSD is successfully partitioned you can check its sections by running "cat /proc/partitions". The image provided treats a PCIe nvme device's sections as an eMMC's sections you will find that an SSD has some small sections.

We can check the "blocks" column and the biggest section is available for users. The /dev/nvme0n1p7 section is used to store data:

root@FriendlyELEC:~# cat /proc/partitions 
major minor  #blocks  name
   1        0       4096 ram0
 259        0  125034840 nvme0n1
 259        1       4096 nvme0n1p1
 259        2       4096 nvme0n1p2
 259        3       4096 nvme0n1p3
 259        4      12288 nvme0n1p4
 259        5      32768 nvme0n1p5
 259        6      32768 nvme0n1p6
 259        7  124932440 nvme0n1p7

The following command formats a section to ext4:

mkfs.ext4 /dev/nvme0n1p7

8.9.4 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/nvme0n1p7
/dev/nvme0n1p7: UUID="13fb682e-ef40-4c71-b98b-3d17403e1205" TYPE=“ext4"

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=13fb682e-ef40-4c71-b98b-3d17403e1205 /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 /media/nvme
chmod 777 /media/nvme

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

mount /media/nvme

You can reboot your T4 to check if your SSD will be automatically mounted:

poweroff

Reboot your T4, if you can see the following screen your SSD is mounted successfully:

8.9.5 SSD Read & Write

You can test SSD read and write speed. In our test we used a LITEON T10 120GB SSD. Different SSDs may have different results.

Write to SSD:

# dd if=/dev/zero of=/media/nvme/deleteme.dat bs=32M count=128
128+0 records in
128+0 records out
4294967296 bytes (4.3 GB, 4.0 GiB) copied, 12.5671 s, 342 MB/s

Read from SSD:

# dd if=/media/nvme/deleteme.dat of=/dev/zero bs=32M count=128
128+0 records in
128+0 records out
4294967296 bytes (4.3 GB, 4.0 GiB) copied, 6.72943 s, 638 MB/s

9 Make Your Own OS Image

9.1 Setup Development Environment

If you want to compile an Android image we suggest you use a PC running a 64-bit Ubuntu 16.04.

sudo apt-get install bison g++-multilib git gperf libxml2-utils make python-networkx zip
sudo apt-get install flex curl libncurses5-dev libssl-dev zlib1g-dev gawk minicom
sudo apt-get install openjdk-8-jdk
sudo apt-get install exfat-fuse exfat-utils device-tree-compiler liblz4-tool

For more details refer to https://source.android.com/source/initializing.html 。

9.2 Install Cross Compiler

9.2.1 Install aarch64-linux-gcc 6.4

Download and extract compiler:

git clone https://github.com/friendlyarm/prebuilts.git
sudo mkdir -p /opt/FriendlyARM/toolchain
sudo tar xf prebuilts/gcc-x64/aarch64-cortexa53-linux-gnu-6.4.tar.xz -C /opt/FriendlyARM/toolchain/

Add the compiler's path to the PATH variable by appending the following lines to the "~/.bashrc" file:

export PATH=/opt/FriendlyARM/toolchain/6.4-aarch64/bin:$PATH
export GCC_COLORS=auto

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

. ~/.bashrc

This is a 64-bit compiler and cannot be run on a 32-bit Linux. After installation is done you can verify it by running the following commands:

aarch64-linux-gcc -v
Using built-in specs.
COLLECT_GCC=aarch64-linux-gcc
COLLECT_LTO_WRAPPER=/opt/FriendlyARM/toolchain/6.4-aarch64/libexec/gcc/aarch64-cortexa53-linux-gnu/6.4.0/lto-wrapper
Target: aarch64-cortexa53-linux-gnu
Configured with: /work/toolchain/build/aarch64-cortexa53-linux-gnu/build/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/6.4-aarch64
--with-sysroot=/opt/FriendlyARM/toolchain/6.4-aarch64/aarch64-cortexa53-linux-gnu/sysroot --enable-languages=c,c++
--enable-fix-cortex-a53-835769 --enable-fix-cortex-a53-843419 --with-cpu=cortex-a53
...
Thread model: posix
gcc version 6.4.0 (ctng-1.23.0-150g-FA)

9.3 Compile Android7 Source Code

9.3.1 Download Android7 Source Code

All the NanoPC-T4's source code is hosted at gitlab, you can download it by running the following commands:

git clone https://gitlab.com/friendlyelec/rk3399-nougat.git

9.3.2 Compile & Make Image File

Compile Android7 by running the following commands:

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

9.3.3 Update Image File

After compilation is done an image file will be generated under Android7's "rockdev/Image-nanopc_t4/" directory. Update the image file on T4 by running the following commands:
1) Insert a bootable SD card with EFLASHER to a card adapter and insert this adapter to a host PC and the SD card's sections will be automatically mounted;
2) Copy all the files under "rockdev/Image-nanopc_t4/" to the "nougat" directory of this SD card's FRIENDLYARM section;
3) Insert this SD card to your NanoPC-T4 and reinstall Android;

9.4 Compile Lubuntu Kernel

9.4.1 compile Linux kernel

git clone https://github.com/friendlyarm/kernel-rockchip --depth 1 -b nanopi4-linux-v4.4.y
cd kernel-rockchip
make ARCH=arm64 nanopi4_linux_defconfig
make ARCH=arm64 nanopi4-images

9.4.2 Update Lubuntu Kernel

To update the kernel you need to use the Linux_Upgrade_Tool_1.27.rar utility. Refer to the aforementioned sections on how to use this utility.

9.5 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)

10 More OS Support

10.1 DietPi_NanoPCT4-ARMv8-Stretch

DietPi is a light-weighted system. Its image file can be as small as 345M bytes. It takes much less resources. It has a DietPi-RAMlog utility. These features allow users to exploit its huge potentials.
FriendlyElec doesn't provide technical support for DietPi.

Here are some steps to boot a DietPi:

• Download DriverAssitant_v4.5.tgz, extract it and install it on a Windows PC;
• Download DietPi_NanoPCT4-ARMv8-Stretch DietPi_NanoPCT4-ARMv8-Stretch, extract it, enter "Image_and_Tools" and run "AndroidTool.exe" as administrator
• It is assumed that the section configuration(parameter.txt) is imported and here is a table:

• Connect a 12V/2A DC power cord and an HDMI monitor to your T4, connect your T4 to a PC with a Type-C cable. Press and hold the Recovery button and the Power button for at least 1.5 seconds AndroidTools will prompt that a LOADER device is found

a)If eMMC hasn't been flashed with an image or the image inside is removed or damaged this eMMC will be recognized as a MASKROM device;
b)You can hold both the BOOT button and the Power button for at least 5 seconds to force the board to enter the MASKROM mode;
c)If your system shows "no device is found" you need to check if you have installed a driver or if your Type-C cable works and then try it again;
d)If your system is booted successfully you can run "reboot loader" on your board via adb or SSH and force your board to enter the LOADER mode.

• Click on "Run" to download your wanted image to eMMC. A while later after the image is flashed successfully your board will be rebooted automatically.
  

Login User Name:root
Password:dietpi

10.2 WiFi

By default WiFi is not enabled. You can enable WiFi by running "dietpi-config". dietpi-config

   --> Network Options:Adapters 
       --> WiFi  Change Wireless Network Settings
           --> Scan  Scan and Connect

Select a WiFi hotspot, type its password and connect

11 Link to Rockchip Resources

• Link to Rockchip's resources: https://gitlab.com/friendlyelec/rk3399-nougat/tree/nanopc-t4-nougat/RKDocs
• RK3399 datasheet V1.6
• RK3399TRM V1.4

12 Update Log

12.1 June-19-2018

• Released English version

12.2 July-5-2018

• Updated section 5.3
• Added sections 7, 9.2 and 10

12.3 July-27-2018

• Updated section 5.3
• Added sections 9.5 and 9.8

12.4 July-29-2018

• Updated section 6.2
• Added sections 7.4, 8.4 and 9.4