Difference between revisions of "NanoPi 2"

Revision as of 03:29, 21 December 2017

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1 Introduction

Overview

Front

Back

• The NanoPi2 is a high performance ARM Board developed by FriendlyARM for Hobbysts, Makers and Hackers for IOT projects. It features the Samsung Cortex-A9 Quad Core S5P4418@1.4GHz SoC and 1G 32bit DDR3 RAM. It has built-in WiFi and Bluetooth which supports 802.11 b/g/n and Bluetooth 4.0. It boots Android and Debian from a TF card. It integrates an HDMI and LCD interface. Its adoption of the Raspberry Pi’s GPIO pin header makes it compatible with both Raspberry Pi’s external GPIO modules and Arduino’s shield boards. Its PCB dimension is 75 x 40 mm.

2 Features

• CPU: S5P4418, 1.4GHz
• RAM: 1GB DDR3
• Built in SDIO WiFi and Bluetooth module
• USB 2.0 Type A x 1
• Debug Serial Port/UART0 x 1
• microSD Slot x 2
• microUSB x 1: for data transmission and power input
• LCD Interface: 0.5 mm pitch SMT FPC seat, for full-color LCD (RGB: 8-8-8)
• HDMI: HDMI 1.4A, Type-A, 1080P60
• DVP Camera Interface: 0.5mm spacing FPC socket. It includes ITU-R BT 601/656 8-bit, I2C and IO
• GPIO: 2.54mm spacing 40pin, compatible with Raspberry Pi's GPIO. It includes UART, SPI, I2C, IO etc
• Button: User Button x 1, Reset Button x 1
• LED: LED for Power Indication x 1, User LED x 1
• PCB Dimension: 75 x 40mm
• Power: DC 5V/2A
• OS: Android, Debian

3 Diagram, Layout and Dimension

3.1 Layout

NanoPi 2 Layout

NanoPi 2 MicroSD

• GPIO Pin Spec

Pin#	Name	Pin#	Name
1	VDD_SYS_3.3V	2	VDD_5V
3	I2C0_SDA	4	VDD_5V
5	I2C0_SCL	6	DGND
7	UART4_RX/GPIOB28	8	UART3_TXD/GPIOD21
9	DGND	10	UART3_RXD/GPIOD17
11	UART4_TX/GPIOB29	12	GPIOB26
13	GPIOB30	14	DGND
15	GPIOB31	16	PWM2/GPIOC14
17	VDD_SYS_3.3V	18	GPIOB27
19	SPI0_MOSI/GPIOC31	20	DGND
21	SPI0_MISO/GPIOD0	22	PWM0/GPIOD1
23	SPI0_CLK/GPIOC29	24	SPI0_CS/GPIOC30
25	DGND	26	PWM1/GPIOC13
27	I2C1_SDA	28	I2C1_SCL
29	GPIOC8	30	DGND
31	SPI2_CLK/GPIOC9	32	GPIOC28
33	SPI2_CS/GPIOC10	34	DGND
35	SPI2_MOSI/GPIOC12	36	GPIOC7
37	SPI2_MISO/GPIOC11	38	ALIVEGPIO2
39	DGND	40	ALIVEGPIO3

• Debug Port CON1（UART0）

Pin#	Name
1	DGND
2	VDD_5V
3	TXD0
4	RXD0

• DVP Camera Interface Pin Spec

Pin#	Name
1, 2	VDD_SYS_3.3V
7,9,13,15,24	DGND
3	SCL0
4	SDA0
5	GPIOB14
6	GPIOB16
8,10	NC
11	VSYNC
12	HREF
14	PCLK
16-23	Data bit7-0

• RGB LCD Interface Pin Spec

Pin#	Name	Description
1, 2	VDD_5V	5V output, LCD power
11，20，29, 37，38，39，40, 45	DGND	ground
3-10	Blue LSB to MSB	RGB Blue
12-19	Green LSB to MSB	RGB Green
21-28	Red LSB to MSB	RGB Red
30	GPIOB25	available for users
31	GPIOC15	occupied by FriendlyARM one wire technology to recognize LCD models and control backlight and implement resistive touch, not applicable for users
32	XnRSTOUT Form CPU	low when system is reset
33	VDEN	signal the external LCD that data is valid on the data bus
34	VSYNC	vertical synchronization
35	HSYNC	horizontal synchronization
36	LCDCLK	LCD clock, Pixel frequency
41	SCL2	I2C2 clock signal, for capacitive touch data transmission
42	SDA2	I2C2 data signal, for capacitive touch data transmission
43	GPIOC16	interrupt pin for capacitive touch, used with I2C2
44	NC	not connected

Note

1. VDD_SYS_3.3V: 3.3V power output
2. VDD_5V: 5V power input/output. When the external device’s power is greater than the MicroUSB’s the external device is charging the board otherwise the board powers the external device. The input range is 4.7V ~ 5.6V
3. For more details refer to the document：NanoPi-2-1507-Schematic.pdf

3.2 Board Dimension

For more details please refer to the document:NanoPi-2-1507-Dimesions(dxf).zip

4 Get Started

4.1 Essentials You Need

Before starting to use your NanoPi2 get the following items ready

• NanoPi 2
• microSD Card/TFCard: Class 10 or Above, minimum 8GB SDHC
• microUSB power. A 5V/2A power is a must
• HDMI monitor or LCD
• USB keyboard and mouse
• A host computer running Ubuntu 16.04 64 bit system

4.2 TF Card We Tested

To make your NanoPi 2 boot and run fast we highly recommand you use a Class10 8GB SDHC TF card or a better one. The following cards are what we used in all our test cases presented here:

• SanDisk TF 8G Class10 Micro/SD TF card:

• SanDisk TF128G MicroSDXC TF 128G Class10 48MB/S:

• 川宇 8G C10 High Speed class10 micro SD card：

4.3 Make an Installation MicroSD Card

4.3.1 Under Windows

Get the following files from here:download link to download image files:

For LCD or HDMI output use the following files:
s5p4418-debian-sd4g.img.zip	Debian image files(there are two Debian files)
s5p4418-debian-sd4g.img.zip	Debian image files(there are two Debian files)
s5p4418-ubuntu-core-qte-sd4g.img.zip	Ubuntu core image files with Qt-Embedded 4.8.6 GUI
No display device connected, use the following files:
s5p4418-debian-sd4g-wifiap.img.zip	Debian image files (By default WiFi AP is started and users can login via VNC or SSH)
Flash Utility:
win32diskimager.rar	Windows utility. Under Linux users can use "dd"

• Uncompress these files. Insert an SD card(at least 4G) 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 NanoPi2 and power on (with a 5V/2A power source). If the green LED is on and the blue LED is blinking this indicates your NanoPi2 has successfully booted.
  

4.3.2 Under Linux Desktop

• 1) Insert your microSD card to your host PC running Ubuntu and check your SD card's device name

dmesg | tail

Search the messages output by "dmesg" for similar words like "sdc: sdc1 sdc2". If you can find them it means your SD card is recognized as "/dev/sdc". Or you can check that by commanding "cat /proc/partitions".

• 2) Download Firmware Package

git clone https://github.com/friendlyarm/sd-fuse_nanopi2.git
cd sd-fuse_nanopi2

• 3) Flash Android Firmware to MicroSD Card

su
./fusing.sh /dev/sdx

(Note: you need to replace "/dev/sdx" with the device name in your system) When you do “git clone” you have to hit “Y” within 10 seconds after it prompts you to download image files otherwise you will miss the download.

• 4) Flash Debian Firmware to MicroSD Card

./fusing.sh /dev/sdx debian

4.3.3 Extend NanoPi 2's TF Card Section

4.3.3.1 For Debian

• Run the following commands on a PC host's terminal:

sudo umount /dev/sdx? 
sudo parted /dev/sdx unit % resizepart 2 100 unit MB print
sudo resize2fs -f /dev/sdx2

4.3.3.2 For Android

• Run the following commands on a PC host's terminal:

sudo umount /dev/sdx?
sudo parted /dev/sdx unit % resizepart 4 100 resizepart 7 100 unit MB print
sudo resize2fs -f /dev/sdx7

(Note: you need to replace "/dev/sdx" with the device name in your system)

4.3.4 LCD/HDMI Resolution

When the system boots our uboot will check whether it is connected to an LCD or an HDMI monitor. If it recognizes an LCD it will configure its resolution. Our uboot defaults to the HDMI 720P configuration.
If you want to modify the LCD resolution you can modify file "arch/arm/plat-s5p4418/nanopi2/lcds.c" in the kernel and recompile it.
If your NanoPi 2 connects an HDMI monitor and it runs Android it will automatically set the resolution to an appropriate HDMI mode by checking the "EDID". If your NanoPi 2 connects an HDMI monitor and it runs Debian by default it will set the resolution to HDMI 720P. If you want to modify the resolution to 1080P modify your kernel's configuration as explained above.

4.4 Update Image Files in MicroSD Card From PC Host

If you want to make some changes to the image files in your MicroSD card follow steps below otherwise you can skip this section.
Insert your MicroSD card into a PC host running Linux, mount the boot and rootfs sections of the SD card and follow the steps below:

1) If you want to change your kernel command line parameters you can do it via the fw_setevn utility under "sd-fuse_nanopi2/tools"
Check the current Command Line:

cd sd-fuse_nanopi2/tools
./fw_printenv /dev/sdc | grep bootargs

Android 5.1.1_r6 starts SELinux. By default it is enforcing. You can change it this way:

./fw_setenv /dev/sdc bootargs XXX androidboot.selinux=permissive

This will set it to "permissive". The "XXX" stands for the original bootargs' value.

2) Update Kernel
Our customized uboot will check the LCD type when it boots.
For a non-Android OS If it recognizes an LCD connected to the NanoPi2 it will load "uImage" from "boot" otherwise it will load "uImage.hdmi"
For Android it doesn't make any difference which display device it detected. You can use your generated uImage to replace the existing one under "boot".
For Debian if your generated kernel is for an LCD you need to replace the existing uImage or if your kernel is for an HDMI monitor you need to replace the existing uImage.hdmi .

4.5 Run Android or Debian

Insert a MicroSD card with Android image files into your NanoPi2, connect the NanoPi2 to an HDMI monitor and a 5V/2A power source the NanoPi2 will be automatically powered on. If you can see the blue LED flashing it means your board is working and you will see Android loading on the HDMI monitor. If at the same time you connect your NanoPi2 to a PC running Ubuntu and Minicom via a serial cable you will see system messages output to the PC’s minicom terminal. Under Debian the password for "root" is "fa".

4.6 Login Debian via VNC or SSH

If your NanoPi 2 is not connected to a display device and it runs the "-wifiap.img" image file you can login to your NanoPi2 at "nanopi2-wifiap" from another device via WIFI. The password for that AP is "123456789". After you successfully connect to your NanoPi2 you can go to this link here to download and install a "VNC Viewer". To login to the NanoPi2 via VNC you need to set the IP address and port to 192.168.8.1:5901 and its default password is "fa123456". Here is a screenshot which shows how it looks like when users login to the NanoPi2 from an iPhone via VNC:

You can login via "SSH -l root 192.168.8.1" too and the default password for "root" is "fa".
To make SSH session run faster turn off the WiFi's power saving mode by using the following command:

iwconfig wlan0 power off

5 Working with Debian

5.1 连接无线网络

Debian系统使用NetworkManager来管理网络。
在Debian的桌面环境下，点击桌面任务栏右下角的网络图标，会弹出 NetworkManger 的菜单，列出当前的网络连接状态，如果有WiFi网络，会列出周边的无线热点，如下图所示：

你可以点击菜单上的无线热点，即可连接到该热点，如果热点是加密的，会弹出密码输入框提示你输入密码。
想进一步了解网络连接相关的内容，可参考这个页面：NetworkManager。

5.2 配置Wi-Fi无线热点

先执行以下命令，默认情况下如果系统中安装了NetworkManager，会提示你先卸载NetworkManager：

sudo turn-wifi-into-apmode yes

卸载NetworkManager完成后，按提示重启开发板。
重启后，再执行上面的命令一次，这次会提示你输入WiFi热点的名称和密码，按提示操作即可。

操作成功后，你可以在电脑上搜索并连接热点，然后通过192.168.8.1这个地址来登录开发板:

ssh root@192.168.8.1

在提示输入密码时，输入预设的密码fa，即可登入。

为了保证ssh的流畅，我们用以下命令关闭wifi的省电模式:

sudo iwconfig wlan0 power off

WiFi工作模式可通过以下命令查询：

sudo cat /sys/module/bcmdhd/parameters/op_mode

输出为数字2则表示当前处于无线热点模式，要切换回普通的Station模式，输入如下命令：

sudo turn-wifi-into-apmode no

5.3 Bluetooth

Click on the bluetooth icon on right bottom of the GUI a menu will pop up:
Make discoverable enables the NanoPi2 to be searched for by other bluetooth devices;
Devices... opens a search window and searches for nearby bluetooth devices(Note: the "Make discoverable" property needs to be enabled on those nearby devices):
Send Files to Device...enables the NanoPi2 to send files to another bluetooth device which is a pair of the NanoPi2.

5.4 Install Debian Packages

We provide a Debian Jessie image. You can install Jessie's packages by commanding "apt-get". If this is your first installation you need to update the package list by running the following command:

apt-get update

You can install your preferred packages. For example if you want to install an FTP server you can do this:

apt-get install vsftpd

Note: you can change your download server by editting "/etc/apt/sources.list". You can get a complete server list from [1]. You need to select the one with "armhf".

5.5 HDMI Audio Output/3.5mm Audio Jack Output Under Debian

By default our Debian system's HDMI output doesn't have audio output. To enable the HDMI audio output you need to install the alsa packages
Firstly, make sure your board runs our latest Debian image and is connected to the internet:
After your board is powered up run the following commands:

apt-get update
apt-get install libasound2
apt-get install alsa-base
apt-get install alsa-utils

After the installation is done copy a ".wav" audio file to your NanoPi 2, connect your NanoPi 2 to an HDMI monitor and play it by using the following command:

aplay music.wav

6 Make Your Own OS Image

6.1 Setup Development Environment

6.2 Install Cross Compiler

Download the compiler package:

git clone https://github.com/friendlyarm/prebuilts.git
sudo mkdir -p /opt/FriendlyARM/toolchain
sudo tar xf prebuilts/gcc-x64/arm-cortexa9-linux-gnueabihf-4.9.3.tar.xz -C /opt/FriendlyARM/toolchain/

Then add the compiler's directory to "PATH" by appending the following lines in "~/.bashrc":

export PATH=/opt/FriendlyARM/toolchain/4.9.3/bin:$PATH
export GCC_COLORS=auto

Execute "~/.bashrc" to make the changes take effect. Note that there is a space after the first ".":

. ~/.bashrc

This compiler is a 64-bit one therefore it cannot be run on a 32-bit Linux machine. After the compiler is installed you can verify it by running the following commands:

arm-linux-gcc -v
Using built-in specs.
COLLECT_GCC=arm-linux-gcc
COLLECT_LTO_WRAPPER=/opt/FriendlyARM/toolchain/4.9.3/libexec/gcc/arm-cortexa9-linux-gnueabihf/4.9.3/lto-wrapper
Target: arm-cortexa9-linux-gnueabihf
Configured with: /work/toolchain/build/src/gcc-4.9.3/configure --build=x86_64-build_pc-linux-gnu
--host=x86_64-build_pc-linux-gnu --target=arm-cortexa9-linux-gnueabihf --prefix=/opt/FriendlyARM/toolchain/4.9.3
--with-sysroot=/opt/FriendlyARM/toolchain/4.9.3/arm-cortexa9-linux-gnueabihf/sys-root --enable-languages=c,c++
--with-arch=armv7-a --with-tune=cortex-a9 --with-fpu=vfpv3 --with-float=hard
...
Thread model: posix
gcc version 4.9.3 (ctng-1.21.0-229g-FA)

6.3 Compile U-Boot

Download the U-Boot source code and compile it. Note that the github's branch is nanopi2-lollipop-mr1:

git clone https://github.com/friendlyarm/uboot_nanopi2.git
cd uboot_nanopi2
git checkout nanopi2-lollipop-mr1
make s5p4418_nanopi2_config
make CROSS_COMPILE=arm-linux-

After your compilation succeeds a u-boot.bin will be generated. If you want to test it flash it to your installation MicroSD card via fastboot. Here is how you can do it:
1) On your PC host run "sudo apt-get install android-tools-fastboot" to install the fastboot utility
2) Connect your NanoPi2 to your PC host via a serial cable (e.g. PSU-ONECOME). Press the enter key within two seconds right after you power on your NanoPi 2 and you will enter uboot's command line mode:
3) After type "fastboot" and press "enter" you will enter the fastboot mode:
4) Connect your NanoPi2 to this PC host via a microUSB cable and type in the following command to flash u-boot.bin:

fastboot flash bootloader u-boot.bin

Warning: you cannot update this MicroSD card by commanding "dd". This command will cause trouble when booting the NanoPi2.

6.4 Prepare mkimage

You need the mkimage utility to compile a U-Boot source code package. Make sure this utility works well on your host before you start compiling a uImage.
You can install this utility by either commanding "sudo apt-get install u-boot-tools" or following the commands below:

cd uboot_nanopi2
make CROSS_COMPILE=arm-linux- tools
sudo mkdir -p /usr/local/sbin && sudo cp -v tools/mkimage /usr/local/sbin

6.5 Compile Linux kernel

6.5.1 Compile Kernel

• Download Kernel Source Code

git clone https://github.com/friendlyarm/linux-3.4.y.git
cd linux-3.4.y
git checkout nanopi2-lollipop-mr1

The NanoPi2's kernel source code lies in the "nanopi2-lollipop-mr1" branch.

• Compile Android Kernel

make nanopi2_android_defconfig
touch .scmversion
make uImage

• Compile Debian Kernel

make nanopi2_linux_defconfig
touch .scmversion
make uImage

After your compilation succeeds a uImage will be generated in the "arch/arm/boot/uImage" directory. This kernel is for an HDMI monitor. You can use it to replace the existing uImage.hdmi
If you want to generate a kernel for an LCD you can do it this way:

touch .scmversion
make nanopi2_linux_defconfig
make menuconfig
  Device Drivers -->
    Graphics support -->
      Nexell Graphics -->
        [*] LCD
        [ ] HDMI
make uImage

After your compilation succeeds a uImage will be generated for an HDMI monitor. You can use it to replace the existing uImage.

6.5.2 Compile Kernel Modules

Android contains kernel modules which are in the "/lib/modules" directory in the system section. If you want to add your own modules to the kernel or you changed your kernel configurations you need to recompile these new modules.
Compile Original Kernel Modules:

cd linux-3.4.y
make CROSS_COMPILE=arm-eabi- modules

Here we have two new modules and we can compile them by following the commands below:

cd /opt/FriendlyARM/s5p4418/android
./vendor/friendly-arm/build/common/build-modules.sh

The "/opt/FriendlyARM/s5p4418/android" directory points to the top directory of Android source code. You can get more details by specifying option "-h".
After your compilation succeeds new modules will be generated

6.6 Compile Android

• Install Cross Compiler

Install 64 bit Ubuntu 16.04 on your PC host.

sudo apt-get install bison g++-multilib git gperf libxml2-utils make python-networkx zip
sudo apt-get install flex libncurses5-dev zlib1g-dev gawk minicom

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

• Download Source Code

You need to use repo to get the Android source code. Refer to https://source.android.com/source/downloading.html 。

mkdir android && cd android
repo init -u https://github.com/friendlyarm/android_manifest.git -b nanopi2-lollipop-mr1
repo sync

The "android" directory is the working directory.

• Compile System Package

source build/envsetup.sh
lunch aosp_nanopi2-userdebug
make -j8

After your compilation succeeds an image will be generated in the "out/target/product/nanopi2/" directory.

7 Connect NanoPi 2 to External Modules

7.1 Connect NanoPi 2 to USB Camera(FA-CAM202)

• In this usecase the NanoPi 2 runs Debian. If you connect your NanoPi 2 to our LCD after Debain is fully loaded click on "other"-->"xawtv" on the left bottom of the GUI and the USB Camera application will be started. After enter "welcome to xawtv！" click on "OK" to start exploring.

For more details about this USB camera refer to this link

7.2 Connect NanoPi 2 to CMOS 5M-Pixel Camera

• In this usecase the NanoPi 2 runs Android5.1. If you connect your NanoPi 2 to our LCD after Android is fully loaded click on the "Camera" icon the application will be started.

For more details about the CAM500A camera refer to this link

7.3 Use OpenCV to Access USB Camera

• The full name of "OpenCV" is Open Source Computer Vision Library and it is a cross platform vision library.
• When the NanoPi 2 runs Debian users can use OpenCV APIs to access a USB Camera device
  

Here is a guideline on how to use OpenCV with C++ on the NanoPi 2
1. Preparations

---Firstly you need to make sure your NanoPi 2 is connected to the internet. 
   Login to your NanoPi 2 via a serial terminal or SSH. After login type in your username(root) and password(fa):
---Run the following commands:

#apt-get update
 (The OS images we provide for the NanoPi 2 by default have the vi utility. However we suggest you install the vim utility)
#apt-get install vim
#apt-get install libcv-dev libopencv-dev

2. Make sure your USB camera works with the NanoPi 2. You can test your camera with NanoPi 2's camera utility.

3. Check your camera device:

#ls /dev/video + "Tab" key (This lists available USB camera devices. )

4. OpenCV's code sample:

#cd /home/fa
#vim test.cpp

#include "opencv2/opencv.hpp"
 
using namespace cv;
 
int main(int, char**)
{
    VideoCapture cap(0); // open the default camera
    if(!cap.isOpened())  // check if we succeeded
        return -1;
 
    Mat edges;
    namedWindow("edges",1);
    for(;;)
    {
        Mat frame;
        cap >> frame; // get a new frame from camera
        cvtColor(frame, edges, CV_BGR2GRAY);
        GaussianBlur(edges, edges, Size(7,7), 1.5, 1.5);
        Canny(edges, edges, 0, 30, 3);
        imshow("edges", edges);
        if(waitKey(30) >= 0) break;
    }
    // the camera will be deinitialized automatically in VideoCapture destructor
    return 0;
}

Compile the code sample:

#g++ test.cpp -o test -lopencv_core -lopencv_highgui -lopencv_imgproc

If it is compiled successfully a "test" executable will be generated:

5. Connect NanoPi 2 to USB Keyboard & Run the Following Command:

#./test

This is what you expect to observe:

7.4 Connect NanoPi 2 to Matrix GPS Module

• The Matrix-GPS module is a small GPS module with high performance. It can be used in navigation devices, four-axle drones and etc.
• The Matrix-GPS module uses serial communication. When the NanoPi 2 is connected to the Matrix GPS module, after the NanoPi 2 is powered up type in the following command in a terminal or click on the xgps icon it will be started.

$su - fa -c "DISPLAY=:0 xgps 127.0.0.1:9999"

• Or on the Debian GUI start the LXTerminal, type in "xgps" and enter it will be started too.

For more details about this GPS module refer to this link
Refer to the following diagram to connect the NanoPi 2 to the Matrix-GPS:

Connection Details:

7.5 Connect NanoPi 2 to I2C Device

• The Matrix-I2C_LCD1602_Keypad module is an easy-to-use display module based on the LCD1602. This module integrates the LCD1602 and the MCP23017 module. It has five programmable keys which allow users to control the LCD1602's display and external devices connected to the module.
• The MCP23017 communicates through I2C interface. You can learn how the NanoPi 2 communicates to an I2C device by studying this module.

For more details about the Matrix - I2C LCD1602 Keypad refer to this link
Refer to the following diagram to connect the NanoPi 2 to the Matrix-I2C_LCD1602_Keypad:

Connection Details:

7.6 Connect NanoPi 2 to SPI Device

• The Matrix-2'8_SPI_Key_TFT module is a 2.8" TFT LCD module. It uses the ST7789S IC and the XPT2046 resistive IC. The LCD's resolution is 320 * 240 and communicates via SPI. It has three programmable user keys.

For more details about the Matrix-2'8_SPI_Key_TFT SPI module refer to this link
Refer to the following diagram to connect the NanoPi 2 to the Matrix-2'8_SPI_Key_TFT module:

Connection Details

8 Android Hardware Access

FriendlyElec developed a library called “libfriendlyarm-hardware.so”, for android developer to access the hardware resources on the development board in their android apps, the library is based on Android NDK.
Accessible Modules：

• Serial Port
• PWM
• EEPROM
• ADC
• LED
• LCD 1602 (I2C)
• OLED (SPI)

Accessible Ports：

• GPIO
• Serial Port
• I2C
• SPI

Please refer to the following url for details：

• Homepage: http://wiki.friendlyarm.com/wiki/index.php/Android_Hardware_Access
• Examples: https://github.com/friendlyarm/AndroidHardwareAccess
• Guide to API in Chinese: https://github.com/friendlyarm/AndroidHardwareAccess/blob/master/友善电子Android硬件开发指南.pdf

9 More OS Support

9.1 Ubuntu-Core

Ubuntu Core with Qt-Embedded is a light Linux system without X-windows. It uses the Qt-Embedded's GUI and is popular in industrial and enterprise applications. Besides the regular Ubuntu core's features our Ubuntu-Core has the following additional features:

• it supports our LCDs with both capacitive touch and resistive touch(S700, X710, S70)
• it supports WiFi
• it supports Ethernet
• it supports Bluetooth and has been installed with bluez utilities
• it supports audio playing

For more details refer to Ubuntu Core with Qt-Embedded.

9.2 Kali

• Go to this link [2] to download the image files
• Prepare an 8G High Speed MicroSD card, insert it into a Linux host and do "sudo fdisk -l" to check its device name, i.e. "/dev/sd*"
• Copy the image files to the card by running the following commands as root:

xzcat kali-2.0-nanopi2.img.xz | dd of=<YOURDEVICE> bs=1m

• After it is done you can boot your NanoPi 2 with this card.

Note: this is offered by Kali and FriendlyARM doesn't provide technical support for it.

9.3 Deepin15 ARM

• Go to this link [3] to download the image files
• Uncompress the file and you will get a 16g.img file which is the image file for MicroSD card.

tar -xf deepin15_nanopi2_armhf_16g.tar.gz

• Prepare an 16G High Speed MicroSD card, insert it into a Linux host and do "sudo fdisk -l" to check its device name, i.e. "/dev/sd*"
• Flash the image files to the card by running the following command as root(in our case our card was recognized as "/dev/sdc"):

sudo dd if=16g.img of=/dev/sdc

(This process takes a while which can be up to one hour)

• After it is done you can boot your NanoPi 2 with this card

Notes:
1. The password for login name "deepin" is "deepin". The password for login name "root" is "admin".
2. The initial booting of Deepin15 takes a relative long time for it generates some configuration files.
3. If WiFi is activated in your system booting might take longer. In this case wait for the sound and wifi icons on the right bottom of the GUI to appear before you start any action.

    ARM code: http://packages.deepin.com/armhf/
    NanoPi 2 Image: http://cdimage.deepin.com/armhf/15/beta1.0/
    NanoPi 2 Image Installation Instruction; http://bbs.deepin.org/forum.php?mod=viewthread&tid=36670
    Forum for Migrating Deepin15 to ARM: http://bbs.deepin.org/

Note: this is offered by the Deepin15 team and FriendlyARM doesn't provide technical support for it.

10 NanoPi 2 with Python

• You can write Python code to control Compact Kit[4]

11 FAQ

• Common Issues

Where to download image files?	The NanoPi 2 has a wiki site which has all the necessary information and details about everything. Its link is :http://wiki.friendlyarm.com/wiki/index.php/NanoPi_2
After the board is powered on the blue LED is not on	1. The power is not enough or instable. A 5V/2A power is a must; 2. The TF card is not a high speed one. Use an 8G (or above) microSD Card/TFCard, Class 10 (or Above); 3. Try our latest image files; 4. Contact our techsupport at techsupport@friendlyarm.com
After the board is powered on the blue LED is on but not blinking	1. The power is not enough or instable. A 5V/2A power is a must; 2. The TF card is not a high speed one. Use an 8G (or above) microSD Card/TFCard, Class 10 (or Above); 3. Try our latest image files
When the board doesn’t connect any display device it can boot normally and output system messages to the serial port. However when it connects an LCD the LCD doesn’t display anything or reboots frequently before it fully loads an OS.	1. The power is not enough or instable. A 5V/2A power is a must; 2. Check whetherthe FPC cable is properly connected or whether it is broken or not; 3. Connect the board to a PC via a serial cable and check whether the LCD is recognized by the board.
When the board doesn’t connect an LCD it can boot normally and output system messages to the serial port. However when it connects an HDMI monitor the monitor doesn’t display anything	1. You can try connecting your board to a monitor with DVI interface with an HDMI to DVI cable 2. Use a monitor which has an HDMI interface
When the board runs Debian HDMI doesn’t have audio output	Our Debian system currently doesn’t support HDMI audio because we didn’t include HDMI’s audio package
When the board runs Android HDMI doesn’t support volume control.	Our Android system currently doesn’t support HDMI’s volume control. Users can adjust it via a remote control

12 Source Code and Image Files Download Links

• Image File: [5]
• Source Code: [6]

13 Resources

• 《创客秘籍》Hacker's Book in Chinese by FriendlyARM
• 《创客秘籍-02》Hacker's Book-02 in Chinese by FriendlyARM
• SEC_Users_Manual_S5P4418_Users_Manual_Preliminary([7])
• Schematic (NanoPi-2-1507-Schematic.pdf)
• Dimensions (NanoPi-2-1507-Dimesions(dxf).zip)
• SOC Datasheet (Pi2_SOC_DS_0.1.pdf)
• AP6212 Datasheet (AP6212_V1.1_09022014.pdf)
• NanoPi2-Component-bot ([8])
• NanoPi2-Component-top ([9])
• External Modules and Development Documents:
  • Button Module
  • LED Module
  • Analog to Digital Converter
  • Relay Module
  • 3 Axis Digital Accelerometer
  • 3 Axis Digital Compass
  • Temperature Sensor
  • Temperature and Humidity Sensor
  • Buzzer Module
  • Joystick Module
  • I2C(PCF8574)+LCD1602
  • Sound Sensor Module
  • Ultrasonic Ranger

14 External Links

• Kali Linux's Image for NanoPi 2
• How to setup Qt development environment for NanoPi 2 & NanoPi 2 Fire

15 Update Log

15.1 Dec-01-2015

• Released Android 5.1.1_r6. The source code has been pushed to https://github.com/friendlyarm
• 4.2.1: Combined originally individual HDMI image and LCD image to one
• 4.3: Updated steps on how to make changes in image files in SD card
• 6: Updated code branch to "nanopi2-lollipop-mr1"
• 6.4.2: Added Debian uImage that supports LCD

15.2 Jan-29-2016

• Add 9 More OS Support

15.3 Feb-02-2016

• Add 9.1 UbuntuMate
• Add 11 External Links

15.4 Mar-17-2016

• Updated Kali, UbuntuMate and Deepin15 download links

15.5 Mar-18-2016

• Modified section 4.3.1
• Added sections 10, 11 and 12

15.6 Mar-29-2016

• Corrected expression errors

15.7 Apr-07-2016

• Added sections 5.5, 7.4, 7.5, 7.6 and 8.1