L298N驱动电机不转，救命！！

只看该作者 · 2009-9-17 16:32

我用是上面那个图，STC12系列单片机，写了程序电机就是不转，高手分析下什么原因，程序如下！
#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
uchar num,temp;
sbit N1=P3^4;
sbit N2=P3^5;
sbit N3=P3^6;
sbit N4=P3^7;
sbit PWM1=P1^2;
sbit PWM2=P1^4;
void init()
{
TMOD=0x11;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
EA=1;
ET0=1;
ET1=1;
TR0=1;
TR1=1;
N1=1;
N2=0;
N3=1;
N4=0;
}
void main()
{
init();
while(1)
{
  if(num==20)
  {
num=0;
PWM1=~PWM1;
  }
  if(temp==20)
  {
temp=0;
PWM2=~PWM2;
  }
}
}
void time0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
num++;
}
void time1() interrupt 3
{
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
temp++;
}