128. STM32CubeIDE Multiple 74HC595 8-Bit Shift Registers with STM32 F103C8T6
Get up to 32 GPO Output pins from only 3 GPIO pins
Video about only one 74HC595 is here • 126. STM32CubeIDE 74HC595 8-Bit Shift...
Code and Instructions are at https://www.micropeta.com/video128