Introduction - If you have any usage issues, please Google them yourself
Completion time using MCU timer functions, Timer 0 interrupt timer interrupt routine once every 0.01s, and as a counter, set the timer interrupt 1 second count initial value of 100, an interrupt for each interrupt initial count minus 1, when reduced to 0, then the 1s to, plus a second variable, then Similarly, to determine whether the clock 1min, 1h and then determine whether to