简单的定时中断（1s）

最新推荐文章于 2024-11-14 11:26:02 发布

原创最新推荐文章于 2024-11-14 11:26:02 发布 · 1.4k 阅读

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#include <reg51.h>

sbit LATCH_seg = P2^1;
sbit LATCH_bit = P2^2;
unsigned char sec;
unsigned char LED[16]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void main() 
{
    TMOD = 0x01;
    TH0 = 0x3c;
    TL0 = 0xb0;
    ET0 = 1;
    EA = 1;
    TR0 = 1;

    while(1)
    {
       P0 = 0xfe;  
       LATCH_bit=1;     
       LATCH_bit=0;
	 

       P0 =  LED[sec]; 
       LATCH_seg = 1;
       LATCH_seg = 0;
			 
			 if(sec == 9)
			 {
			     sec = 0;
			 }
    }
	}

void ISR_T0() interrupt 1
{
    unsigned char i;
		
		EA = 0;
    TH0 = 0x3c;
		TL0 = 0xb0;
		i++;
		
		if(i == 20)
		{
		    sec++;
				i = 0;
		}
		EA = 1;
}