step36.c

来自「不少单片机C代码」· C语言 代码 · 共 41 行

#include <reg51.h>
#define  DL 50
#define  DR 0
#define uchar unsigned char
#define uint  unsigned int
uchar idata plus[7]={0x01,0x03,0x02,0x06,0x04,0x05,0x00};
uchar idata minu[7]={0x01,0x05,0x04,0x06,0x02,0x03,0x00};
uchar  k=0;
uchar idata *x;

void control(cf,n)
bit cf;
uint n;
{ uint i;
  if(cf==0) x=&plus[0];
  else  x=&minu[0];
  TMOD=0x01;
  TH0=(65536-DL*500)/256;
  TL0=(65536-DL*500)%256;
  TR0=1;ET0=1;EA=1;
  for(i=0;i<n;i++) { 
    while(k==0);
    k=0;
  }
}
 
void delay(void) interrupt 1 using 1
{ 
  P1=*x++;
  if(*x==0) x=x-6;
  TH0=(65536-DL*500)/256;
  TL0=(65536-DL*500)%256;
  k=1;
}

void main(void)
{
  if (DR==0) control(0,10);
  else control(1,10);
}