第四章单片机程序.doc

4911#include #include #include main.hvoid main()system_init();while(1)P1 = 0x00;/* P1口：LED全亮 */void system_init(void)EA = 1;/* 总中断允许 */EX0 = 1;/* 允许外部中断0 */IT0 = 1;/* 设置外部中断0为边沿触发 */sbit spred=P00;sbit spyell=P01;sbit spgre=P02;sbit szred=P03;sbit szyell=P04;sbit szgre=P05;void Delay(unsigned int i)unsigned int j,k=0; for(k=0;ki;k+) for(j=0;j333;j+) _no