Usage

2022-10-02

Introduct openwrt

Allwinnner V831 use Tina Linux, which is created from OpenWrt.

The OpenWrt is a Linux operating system targeting embedded devices. Visit official-website and official open repository for more details.

For V831 we use adb shell to control it. Connect otg interface marked on board with computer.

  • Fow Windows users, download the latest adb, add its path into system path and save it then use command adb shell to connect V831.
  • For linux we need to install adb first, then run command adb shell to connect V831.

Okpg package management

The opkg utility is the lightweight package manager used for upgrading the functionality of the system rather significantly by downloading and installing pre-made packages from package repositories.

  • opkg update # Update the updatable utility
  • opkg upgrade # Upgrade the upgradable utility
  • opkg list # list all utility
  • opkg install # install target utility
  • opkg remove # remove target utility

For example：

root@sipeed:/# opkg list 
MaixPy3 - 0.2.5-1
alsa-lib - 1.1.4.1-1
busybox - 1.27.2-3
busybox-init-base-files - 167-1612350358
ca-certificates - 20160104
curl - 7.54.1-1
dropbear - 2015.71-2
e2fsprogs - 1.42.12-1
eyesee-mpp-external - 1.0-1
eyesee-mpp-middleware - 1.0-1
eyesee-mpp-system - 1.0-1

Test screen

  • There is a flushing on screen after power on. this means the board is well working, and the flushing is caused by the system reset.

We can use command cat /dev/urandom > /dev/fb0 to test the screen.

Run python3

We can type python3 in adb shell to run python3 in interative mode on V831.

import platform
print(platform.uname())

Actual operation on 2022.07.06

   __   _
  / /  (_)__  __ ____ __ ------------------------
 / /__/ / _ \/ // /\ \ /  sipeed.com (Neptune)
/____/_/_//_/\_,_//_\_\  ------------------------

root@sipeed:/# python3
Python 3.8.5 (default, Jun 14 2022, 09:51:56)
[GCC 6.4.1] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import platform
>>> print(platform.uname())
uname_result(system='Linux', node='sipeed', release='4.9.118', version='#3242 PREEMPT Tue Jun 28 04:03:38 UTC 2022', 
machine='armv7l', processor='')

Test camera

We use MaixPy3 to test camera, let's run python3 first.

from maix import camera, display, image 
display.show(camera.capture())

If your screen doesn't display anything, make sure your mirror is the latest one and your drivers are correct.

ToolChain

Here is a toolchain for V831, it can be run in linux system.

MaixPy3

For this device we suggest you use [Maixpy3] to develop , and its English documents will come out soon.

SDK development

Now we have open V831 source sode here, use this https://github.com/Tina-Linux/tina-V83x if you need.