NanoPC-T4
From FriendlyELEC WiKi
Contents
1 Introduction
- 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:
- 1 X 3V/1.8V I2C, up to 2 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
- 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 UART2B_TX(3V) 9 GND 10 UART2B_RX(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.
- Notes
- The Power Jack is the only power input port. All power pins at other ports are output.
- How to make T4 start automatically when power is plugged in
- 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 14.04 64 bit system or Windows 7
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.
| Image Files | |
| rk3399-eflasher-YYYYMMDD-full.img.zip | Image for SD card, which is flashed to an SD card. This card can then be used to flash an Android or Lubuntu image to eMMC |
| android-nougat-images.tgz | Android 7.1.2 Image |
| lubuntu-desktop-images.tgz | Lubuntu desktop image with X Window |
| Flash Utility: | |
| win32diskimager.rar | Windows utility. Under Linux users can use "dd" |
| AndroidTool_Release_v2.42.7z | A Windows utility provided by Rockchip for flashing an image to eMMC. It needs to be used together with a Type-C cable. |
| DriverAssitant_v4.5.tgz | A Windows USB driver provided by Rockchip. When you flash an image with AndroidTool you need to install this driver. |
| Linux_Upgrade_Tool_1.27.rar | A Linux utility provided by Rockchip for flashing an image to eMMC. It needs to be used together with a Type-C cable. |
5.3.2 Flash Image to eMMC with eflasher
- Get a 8G SDHC card;
- Download the "rk3399-eflasher-YYYYMMDD-full.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 to eMMC with AndroidTool
- 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.
- 可根据Android开发工具手册.pdf，导入分区配置即固件中的parameter.txt，然后指定各分区的烧写文件路径，如下图所示:
- 连接好12V/2A的DC接口电源及HDMI显示设备，连接Type-C数据线到PC，按住Recovery键再长按(1.5秒以上)Power键开机，AndroidTools会显示“发现一个LOADER设备”
a) 如果eMMC没有烧写过系统或eMMC的系统被擦除或损坏则会显示为MASKROM设备; b) 您也可以按住BOOT键再长按Power键开机，同时持续按住BOOT键5秒以上强制进入MASKROM模式; c) 如果显示“没有发现设备”，请先检查是否已成功安装驱动，检查Type-C数据线然后按上述方法重新开机，或按住Recovery键再按Reset键; d) 另外，如果已成功启动系统，可通过串口、adb或ssh等方式在板子上运行reboot loader重启板子并进入LOADER模式。
- 点击执行即可下载固件到eMMC，请耐心等待，烧写成功结束后将自动重启。
5.3.4 使用Linux_Upgrade_Tool
这是Rockchip提供的Linux下的命令行工具，用于通过Type-C数据线来升级eMMC中的固件，同时还提供了如擦除eMMC、直接读/写eMMC等功能。
- 安装upgrade_tool: 下载Linux_Upgrade_Tool_1.27.rar后解压即可获得upgrade_tool，然后复制并设置权限
sudo cp upgrade_tool /usr/local/sbin sudo chown root:root /usr/local/sbin/upgrade_tool sudo chmod 0755 /usr/local/sbin/upgrade_tool
- 根据自己的需要下载images-for-eflasher下的系统固件并解压，如Lubuntu的固件文件是lubuntu-desktop-images.tgz
- 参考“使用AndroidTool”，启动板子并进入LOADER或MASKROM模式;
- 运行以下命令即可烧写Lubuntu系统并重启:
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
- 如果想烧写Android 7到eMMC，可下载固件文件并解压后运行以下命令:
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
如果固件中的MiniLoaderAll.bin版本不同，或烧写与eMMC中不同的系统，则可能会遇到无法成功启动的情况，需要擦除eMMC。
先启动板子并进入LOADER，运行以下命令可删除eMMC，如程序显示"Download Boot Start"后超过10s无变化可按Reset键，然后再运行一次以下命令。
sudo upgrade_tool EF MiniLoaderAll.bin擦除成功结束后将显示"Erase flash ok."
6 如何编译系统
6.1 搭建编译环境
搭建编译Android的环境建议使用64位的Ubuntu 16.04，安装需要的包即可。
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
更多说明可查看 https://source.android.com/source/initializing.html 。
6.2 安装交叉编译器
6.2.1 安装aarch64-linux-gcc 6.4
首先下载并解压编译器:
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/
然后将编译器的路径加入到PATH中，用vi编辑vi ~/.bashrc，在末尾加入以下内容：
export PATH=/opt/FriendlyARM/toolchain/6.4-aarch64/bin:$PATH export GCC_COLORS=auto
执行一下~/.bashrc脚本让设置立即在当前shell窗口中生效，注意"."后面有个空格：
. ~/.bashrc这个编译器是64位的，不能在32位的Linux系统上运行，安装完成后，你可以快速的验证是否安装成功：
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)
