附件A 源程序
#include <reg52.h>
sbit p00 = P0^0;
sbit p01 = P0^1;
sbit p02 = P0^2;
unsigned char code Forward[4]={0xFC,0xF9,0xF3,0xF6};//正轉表格
unsigned char code Return[8]={0xF7,0xF3,0xFB,0xF9,0xFD,0xFC,0xFE,0xF6};//反轉表格
void delay(unsigned int i)//延時
{while(--i);}
/*********** 步進電機正轉P0口的第三口，P0^2***********************/
void turnfor(void)
{unsigned char i;
while(1)
{
if(p00 == 0)
{delay(1000);
if(p00 == 0)
break;
}
if(p01 == 0)
{
if(p01 == 0)
break;
}
for(i = 0; i < 4; i++)
{
P1 = Forward[i];
delay(2000);
}
}
}
/********************步進電機反轉 P0口的第二口，P0^1*********************/
void retur(void)
{
unsigned char i;
while(1)
{
if(p00 == 0)
{
delay(1000);
if(p00 == 0)
break;
}
if(p02 == 0)
{delay(1000);
if(p02 == 0)
break;
}
for(i = 0; i < 8; i++)
{P1 = Return[i];
delay(2000);
}
}
}
/*****************步進電機停止轉動 P0口的第一口，P0^0*******************/
void stop(void)
{
while(1)
{
if(p01 == 0)
{
delay(1000);
if(p01 == 0)
break;
}
if(p02 == 0)
{if(p02 == 0)
break;
}
}
}
/************************步進電機轉動主函數*******************************/
void Main(void)
{stop();
while(1)
{if(p00 == 0)
{delay(1000);
if(p00 == 0)
stop();
}
if(p01 == 0)
{delay(1000);
if(p01 == 0)
retur();
}
if(p02 == 0)
{delay(1000);
if(p02 == 0)
turnfor();
}
}
}
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