test.c

一个用keil写的,动行在51单片机上的测试程序,在protes下仿真过.希望对初学者能有用.

#include <reg52.H>         
#define uint  unsigned int  
#define uchar unsigned char
sbit  pulse =P3^0;
sbit  dir   =P3^1;
sbit  enter =P2^3;
uint delay=20;         //脉冲频率
uint delay1=2000;      //脉冲间隔
uint unm=4000;         //脉冲数x2
main()
{
uint i,d;
 while(1)
 {
while(enter);
while(!enter);
dir=!dir;

 for(i=unm;i>0;i--)
 {
 for(d=delay;d>0;d--){};
pulse=!pulse;
 }

 }
}