Reference circuit diagram of an Arduino-compatible LCD backpack is shown below. What follows next is information on how to use one of these inexpensive backpacks to interface with a microcontroller in ...

We’ll be using the STM32F042 as the target MCU, but other STM32 families are rather similar from an I2C perspective. We’ll also use CMSIS-style peripheral and register references.

HID-over-I2C could be a great boon to avoid occupying any of the USB ports and pull off stuff like having one of the Joysticks double as a improvised mouse. Assuming i can manage to figure out ...