51单片机步进电机旋转角度控制

原创

于 2014-11-01 21:23:08 发布 · 1w 阅读

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CC 4.0 BY-SA版权

本文详细介绍了如何利用51单片机的库函数，实现步进电机的精确旋转角度控制，通过循环左移技术，确保电机按照预设角度稳定转动，为单片机控制电机应用提供了基础教程。

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#include <reg52.h>

typedef unsigned char uchar;
typedef unsigned int uint;
typedef unsigned long ulong;

uchar code beatCode[8] = {
    0xE, 0xC, 0xD, 0x9, 0xB, 0x3, 0x7, 0x6
};
ulong beats = 0;
uchar T0RH = 0, T0RL = 0;

void turnMotor(ulong angle){
    EA = 0;
    beats = angle * 4076 / 360;
    EA = 1;
}

void setTimer0(uint ms){
    ulong tmp;
    tmp = 11059326 / 12;
    tmp = tmp * ms / 1000;
    tmp = 65536 - tmp;
    tmp += 28;
    T0RL = tmp;
    T0RH = tmp>>8;
}

void interruptTimer0() interrupt 1{
    static uchar index = 0;
    TH0 = T0RH;
    TL0 = T0RL;
    if(beats){
        uchar tmp = P1;
        tmp &= 0xF0;
        tmp |= beatCode[index];
        P1 = tmp;
        index = ++index & 0x07;
        beats--;
    }
    else{
        P1 |= 0x0F;
    }
}

void main(){
    EA = 1;
    TMOD = 0x01;
    setTimer0(2);
    TH0 = T0RH;
    TL0 = T0RL;
    ET0 = 1;
    TR0 = 1;
    turnMotor(2 * 360 + 180);
    while(1);
}