STM32 LCD HD44780 Push Button Control with 74HC165

Target

When pressing the SW1 button, the LCD display increases by one unit (for example, 00:00:00 -> 00:00:01, note that hours are displayed from 00-23, minutes and seconds are displayed from 00-59).

When the SW2 button is pressed, the LCD displays a decrease of one unit.

When button SW3 is pressed, LCD displays "00:00:00" again.

When pressing button SW4, LCD automatically counts up from the current time. When pressing SW1, SW2 or SW3, counting stops.

Demo

Library File: LCD.c

Source Code: main.c