rock pi s 操作外设

3308 开发板配套镜像当中，没有直接加载外设的操作接口 uart I2C pwm ，不能像RK其他系列直接更改/boot/config.txt直接启用外设。

需要用到libmraa 控制。

Libmraa on ROCK Pi S This guide describes how to use libmraa on ROCK Pi S. Install essential packages Package libmraa is in the Radxa APT bionic-stable and buster-stable repositories. Execute the following commands to add Radxa APT rock@rockpis:~$ export DISTRO=bionic-stable # for Bionic or Get the pub key rock@rockpis:~$ wget -O - apt.radxa.com/buster-testing/public.key | sudo apt-key add - Install essential packages: rock@rockpis:~$ sudo apt-get update rock@rockpis:~$ sudo apt-get install -y rockchip-overlay libmraa # libmraa version: >=0.4 rock@rockpis:~$ sudo apt-get install -y linux-4.4-rock-pi-s-latest # ROCK Pi S kernel version: >= 4.4.143-47 Install compiler: rock@rockpis:~$ sudo apt install -y build-essential

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