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基于51控制的pwm調(diào)試直流電機(jī)
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/* 程序名：PWM直流電機(jī)調(diào)速 */
#include<reg51.h>
#define TH0_TL0 (65536-1000)//設(shè)定中斷的間隔時(shí)長(zhǎng)
unsigned char count0 = 50;//低電平的占空比
unsigned char count1 = 0;//高電平的占空比
bit Flag = 1;//電機(jī)正反轉(zhuǎn)標(biāo)志位,1正轉(zhuǎn)，0反轉(zhuǎn)
sbit Key_add=P2 ^ 0; //電機(jī)減速
sbit Key_dec=P2 ^ 1; //電機(jī)加速
sbit Key_turn=P2 ^ 2; //電機(jī)換向
sbit PWM1=P2^6;//PWM 通道 1，反轉(zhuǎn)脈沖
sbit PWM2=P2^7;//PWM 通道 2，正轉(zhuǎn)脈沖
unsigned char Time_delay;
/************函數(shù)聲明**************/
void Delay(unsigned char x);
void Motor_speed_high(void);
void Motor_speed_low(void);
void Motor_turn(void);
void Timer0_init(void);
/****************延時(shí)處理**********************/
void Delay(unsigned char x)
{
Time_delay = x;
while(Time_delay != 0);//等待中斷，可減少PWM輸出時(shí)間間隔
}
/*******按鍵處理加pwm占空比，電機(jī)加速**********/
void Motor_speed_high(void)
{
if(Key_add==0)
{
Delay(10);
if(Key_add==0)
{
count0 += 5;
if(count0 >= 100)
{
count0 = 100;
}
}
while(!Key_add);//等待鍵松開(kāi)
}
}
/******按鍵處理減pwm占空比，電機(jī)減速*****/
void Motor_speed_low(void)
{
if(Key_dec==0)
{
Delay(10);
if(Key_dec==0)
{
count0 -= 5;
if(count0 <= 0)
{
count0 = 0;
}
}
while(!Key_dec );
}
}
/************電機(jī)正反向控制**************/
void Motor_turn(void)
{
if(Key_turn == 0)
{
Delay(10);
if(Key_turn == 0)
{
Flag = ~Flag;
}
while(!Key_turn);
}
}
/***********定時(shí)器0初始化***********/
void Timer0_init(void)
{
TMOD=0x01; //定時(shí)器0工作于方式1
TH0=TH0_TL0/256;
TL0=TH0_TL0%256;
TR0=1;
ET0=1;
EA=1;
}
/*********主函數(shù)********************/
void main(void)
{
Timer0_init();
while(1)
{
Motor_turn();
Motor_speed_high();
Motor_speed_low();
}
}
/**************定時(shí)0中斷處理******************/
void Timer0_int(void) interrupt 1 using 1
{
TR0 = 0;//設(shè)置定時(shí)器初值期間，關(guān)閉定時(shí)器
TL0 = TH0_TL0 % 256;
TH0 = TH0_TL0 / 256 ;//定時(shí)器裝初值
TR0 = 1;
if(Time_delay != 0)//延時(shí)函數(shù)用
{
Time_delay--;
}
if(Flag == 1)//電機(jī)正轉(zhuǎn)
{
PWM1 = 0;
if(++count1 < count0)
{
PWM2 = 1;
}
else
PWM2 = 0;
if(count1 >= 100)
{
count1=0;
}
}
else //電機(jī)反轉(zhuǎn)
{
PWM2 = 0;
if(++count1 < count0)
{
PWM1 = 1;
}
else
PWM1 = 0;
if(count1 >= 100)
{
count1=0;
}
}
}
/************************************************
void Delay(unsigned char x)
{
Time_delay = x;
while(Time_delay != 0);//等待中斷，可減少PWM輸出時(shí)間間隔
}
Delay(10);
if(Time_delay != 0)//延時(shí)函數(shù)用
{
Time_delay--;
}
