可以实现按键的消抖，长按，短按，连续按的识别和其他功能！-Can achieve key debounce, press, press, continuous press identification, and other features!

This Program polls the button at RA3 and changes the state of RA5 after the press has been debounced. Use a 20 ms debounce period.-This Program polls the button at RA3 and changes the state of RA5 after the press has been debounced. Use a 20 ms deb