This tutorial has SPI, I2C, PWM, GPIO, ADC, and UART. Its in Python, but it almost exclusively uses the sysfs interface, so porting it to C, or the language of

This tutorial has SPI, I2C, PWM, GPIO, ADC, and UART. Its in Python, but it almost exclusively uses the sysfs interface, so porting it to C, or the language of your choice, should be very simple. https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/ https://learn.adafruit.com/setting-up-io-python-library-on-b... I think they also have a similar library for the RPi.