Purpose: To control the delay through the timer interrupt to reverse the state of the first LED
The circuit diagram of the development board MUC and LED module is as follows:
For the key points about timers and counters, please refer to: https://blog.csdn.net/cax1165/article/details/86659302
For the key points about interruption, please refer to: https://blog.csdn.net/cax1165/article/details/86633086
#include #define uc unsigned char sbit led=P2^0; void timeint0() { TMOD=0X01; //Working mode TH0=0XFC; //Timing 1ms TL0=0X18; //timing 1ms TR0=1;//control ET0=1; //Timer 0 interrupt request EA=1; //Total interrupt } void time0int () interrupt 1 //Note the interrupt number { static int i=0;//Note the use of static variables! TH0=0XFC; //Timer reset TL0=0X18; //Timer reset i++; if(i==1000) //1000 1ms make up 1s { i=0; led=~led; //led state inversion } } void main() { timeint0(); while(1); }
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