L298N直流步进电机驱动直流电机程序

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int

sbit INPUT1 = P1^0;         //控制口

sbit INPUT2 = P1^1;
sbit INPUT3 = P1^2;
sbit INPUT4 = P1^3;

sbit ENA = P1^4;             //产生PWM波

sbit ENB = P1^5;

uint MA=0,MB=0;
uint SpeedA=20;                //50%占空比

uint SpeedB=20;

void delay(uint z) {
    uint x,y;
    for(x=z;x>0;x--)
        for(y=125;y>0;y--);
}

void main(void)
{
     L298N_init();
    while(1){}
}



void L298N_init(void)
{
    delay(1000)    ;
    delay(1000)    ;

    INPUT1=1;    INPUT2=0;
    INPUT3=1;    INPUT4=0;    //电机停此


    TH0 = 0xF4;
    TL0 = 0x48;
    TH1 = 0xF4;
    TL1 = 0x48;
    TMOD = 0x11;
    TR0 = 1;
    TR1 = 1;
    ET0 = 1;
    ET1 = 1;
    EA = 1;
}

void time0_int() interrupt 1 using 1
{
    TR0=0;
    TH0=0xF4;
    TL0=0x48;
    MA++;

    if(MA< SpeedA){            //占空比

     ENA = 1;
    }
    else ENA = 0;

    if(MA == 40){
     MA = 0;
    }
    TR0 = 1;
}

void time1_int() interrupt 3 using 1
{
    TR1=0;
    TH1=0xF4;
    TL1=0x48;
    MB=MB + 1;
    if(MB < SpeedB){
     ENB=1;
    }
    else ENB = 0;
    if(MB == 40){
     MB = 0;
    }
    TR1 = 1;
}