GitHub repository: quychu/stm32-lcd-nhd0420-driver
Description: This is a lightweight C driver for controlling the **NHD-0420H1Z 20x4 LCD display** via 4-bit parallel interface using **STM32 HAL**.   It is fully compatible with **HD44780/ST7066U controllers**, supports standard instructions, and has been tested on **STM32H7 (CM7)**.