用stc 89C52单片机实现键盘控制28BYJ-48步进电机的启停 加减速，正反转，驱动是ULN2003，求助高手程序

Question

求助啊！！！

Answer 1

#include<reg52.h>
#define uchar unsigned signed
sbit jia_key=P3^6;
sbit jian_key=P3^7;
sbit zf_key=P3^5;
bit flag=0;
uchar codetable[]={0x01,0x02,0x04,0x08,0x08,0x04,0x02,0x01};
uchar num,qidong,PWM,table_begin;
void delay(uchar 1)
{
uchar j,k;
for(j=i;j>0;j--)
for(k=125;k>0;k--);
}
void key()
{
if(jia_key==0)
{
delay(5);
if(jia_key==0)
{
num++;
if(num==4)num=3;
while(jia_key==0);
}
}
if(jian_key==0)
{
delay(5);
if(jian_key==0)
if(num!=0)
num--;
else
num=0;
while(jian_key==0);
}
}
if(zf_key==0)
{
delay(5);
if(zf_key==0)
{
flag=-flag;
while(zf_key==0);
}
}
}
void qidong()
{
uchar i,j;
switch(num)
{
case 0:PWM=5;break;

case 1:PWM=4;break;
case 2:PWM=3;break;
case 3:PWM=2;break;
}

if(flag==0)
table_begin=0;
else

table_begin=4;

for(i=table_begin;i<4+table_begin;i++)

{
P1=table[i];
for(j=0;j<PWM;j++)

delay(10);

}
}
void main()
{
while(1)

{
key();

qidong();
}

}