HD44780 I2C Library for STM32
I've implemented a library based on Arduino Liquid Crystal I2C Library and STM32 HAL driver.
I used PCF8574A expander IC and its address was 0x3F.
If you use a different PCF8574x series, You may have to change I2C address.
As I didn't test all of functions, You may experience some flaws while you're testing.
Reference: https://github.com/johnrickman/LiquidCrystal_I2C
https://blog.naver.com/eziya76/221484861357
eziya/STM32_HAL_I2C_HD44780
HD44780 I2C library based on Arduino LiquidCrystal library & STM32 HAL driver.
C