good.txt

L298N直流电机步进电机两用驱动器

#include<reg52.h>
#define uchar unsigned char

unsigned char N=0;
unsigned char X=5;	//占空比初始值为50%
unsigned char Y=3;

int a,b;

sbit P2_2=P2^2;//M1加速
sbit P2_3=P2^3;//M2减速

sbit P2_0=P3^0;//M1启动
sbit P2_1=P3^1;//M1停止

sbit PWMA=P3^7;
sbit PWMB=P3^6;

void del()  /*延时0.2秒*/
{
unsigned char i,j,k;
for(i=20;i>0;i--)
for(j=20;j>0;j--)
for(k=248;k>0;k--);
}


void scjs(void)interrupt 3
{
TH1=0XC6;
TL1=0x17;
if(P2_2==0)
{Y++;
del();
}		  
if(P2_3==0)
{Y--;
del();
}
switch(Y)
 {
 case 0: X=0;  break;
 case 1: X=5;  break;
 case 2: X=10; break;
 case 3: X=15; break;
 case 4: X=20; break;
 case 5: X=25; break;
 case 6: X=40; break;
 case 7: X=60; break;
 case 8: X=80; break;
 case 9: X=99; break;
 default:      break;
 }

b++;
}

main()
{
TMOD=0x00;
IE=0X88;
TH1=0XC6;
TL1=0X17;
TR0=1;
TR1=1;
a=0;
b=0;
while(1)
{
 PWMB=PWMA=1;
 while(1)
 {
 b=0;
 while(!b);
 if (N==X)
 PWMB=PWMA=0;
 if (N==100)break;
if(P2_0==0)//M1启动
         {
          P1=0X05;
          }
 if(P2_1==0)//M1停止
          {
           P1=0X0E;
          }
 
 N++;
 }
 N=0;
 }

}