The idea of single chip microcomputer time-sharing control

WRKO

The idea of single chip microcomputer time-sharing control [Copy link]

I saw a post about the time-sharing idea of MCU but I don't quite understand it. For example, in the main function, the scanning program, xianshi represents the digital tube, and wei represents the key. Can you briefly explain the function of this time-sharing scanning? Thank you very much! I tried to remove this part of the scanning program, but the digital tube will not display when the key is pressed.

tiankai001

The scan function sends the data to be displayed to the corresponding port. If you remove it, it will not be displayed.

邱海涛qht

Your program is a sequential structure placed in a large loop, and it cannot be said to be time-sharing scanning. When the program is executed, the display scan is executed first and then the key scan is executed. It’s just that the microcontroller executes it faster, so it feels like it is being performed simultaneously.