Rock pi 4 Usage

Here are some instructions to use the card with rock pi 4:

1. Install Debian https://wiki.radxa.com/Rockpi4/Debian (u/p:rock/rock)
2. Install mraa library: https://wiki.radxa.com/Rockpi4/dev/libmraa
3. Turn on the I2C port sudo nano boot/hw_intfc.conf | turn on i2c7
4. Install build tools: sudo apt-get install build-essential python-pip python-dev python-smbus git
5. Get the repository: ~$ git clone https://github.com/SequentMicrosystems/ioplus-rpi.git
6. Because the rockpi use different I2C port than Raspberri Pi, change "/dev/i2c-1" with "/dev/i2c-7" in ioplus-rpi/src/comm.c
7. cd ioplus-rpi/
8. Install the ioplus command line interface: ~/ioplus-rpi$ sudo make install
9. Connect the card and test the software, ioplus -list should return the cards connected to the ROCK PI and ioplus will give you the list of the available commands