LED_key_or_interrupt_control.rar_LED

#include <reg51.h> #define uchar unsigned char //宏定义用uchar 代替 unsigned char uchar array_LED[] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01};//0--7--0(循环显示) uchar one_sec, cp; /*******************Timer0中断服务函数**********************/ void timer0_isr(void) interrupt 1 { TH0 = 0xf8; //重新附初值 TL0 = 0x2f; //重新附初值 cp++; if(cp >= 250) //半秒加一次 { cp = 0; one_sec++; } if(one_sec == 15)one_sec = 0; P0 = array_LED[one_sec]; } /***********************中断初始化函数**********************/ void timer0_init(void) { TMOD = 0x01; //中断方式1 TH0 = 0xf8; TL0 = 0x2f; //对机器脉冲计数，2000个计满溢出引发中断 EA = 1; //开总中断 ET0 = 1; //开T0中断 TR0 = 1; //启动定时器T0 } void main(void) { timer0_init(); while(1); }