I added more modules to the HAL layer. The Hitachi LCD driver is now in a stable state. It uses a
MCP23008 chip-based backend to reduce the number of wires required to access the display.
This demo uses a number of Adafruit boards and components:
- Adafruit Feather M0 (any type)
- Adafruit I2C / SPI character LCD backpack
- Or just use an MCP23008 IO chip directly.
- Adafruit LCD 20×4
- Any LCD with a Hitachi HD44780 compatible chip will work.
You will find all the firmware files in the following repositories. The demo repository includes all required dependencies using submodules.
After installing the firmware on the board, just connect a USB cable and start a terminal on the computer. The firmware waits for the serial connection. A shell with command prompt is displayed in the terminal.
help to get a list of supported commands. Some of them take additional arguments.
The HAL system provides a complete framework for firmware development. It is still in an early stage, but already provides concepts and tools which can be useful for productive projects. This demo illustrates a number of these features.
If you have any questions, missing some information, or simply wish to provide feedback, feel free to comment below!