V直流电机H桥驱动电路及单片机C程序

1、24V直流电机H桥驱动电路及51单片机C程序一、原理图特别说明：CCP0、CCP1 = 00时，电机停止；为01时，电机正转，为10时，电机反转；11是绝对不允许的，为防止H桥共态导通，调试时需要特别注意！二、程序代码#include<STC12C52.h>/头文件#include<intrins.h>#define uint unsigned int#define uchar unsigned charsbit key1 = P23;/启动停止sbit key2 = P22;/正反转sbit key3 = P21;/UPsbit key4 = P20;/DOWNuch

2、ar run_flag; /0 停止；1 启动uchar direction_flag; /0 正转；1 反转uchar count; /加,减计数 key/=void status_initial(void);void PWM_initial(void);void delay_1us(uchar x);void delay_led(uchar x);void key_scan(void);void M_run(void);/=void main() /注：在程序里面，对两路PWM进行互锁，防止H桥电路共态导通！ /调试时，也要特别注意！status_initial();PWM_initial

3、();while(1)key_scan();M_run();void status_initial(void)/*CCAP0H = 0XFF;CCAP0L = 0XFF;/占空比为0% CCAP1H = 0XFF;CCAP1L = 0XFF;/占空比为0% */run_flag = 0;direction_flag = 0;count = 0;/-给定一个初始值，设定电机开机的初始转速?或者按下启动，up启动加速P1 = 0x00;/灯灭void PWM_initial(void)CCON = 0X00;CMOD = 0X02;/空闲模式下PCA计数器继续工作，使用系统时钟，禁止CCON的CF

4、位中断CCAPM0 = 0X42;/0100 0010 允许比拟器功能，允许CCP0脚用作脉宽调节输出CCAPM1 = 0X42;/同上，8位PWM，无中断CCAP0H = 0XFF;/PCA捕捉/比拟存放器-低八位和高八位-频率f = SYSclk/256CCAP0L = 0XFF;/工作于PWM模式，用于控制输出的占空比CCAP1H = 0XFF;/当存放器CL的值小于EPCnL，CCAPnL时，输出为低；当存放器CL的值等于或大于【EPCnL，CCAPnL】时，输出为高；CCAP1L = 0XFF;/当CL的值有FF变为00溢出时，EPCnH，CCAPnH的内容装载到EPCnL，CCAP

5、nL中/当EPCnL = 0及CCAPnL = 00H时，固定输出高/当EPCnL = 1及CCAPnL = FFH时，固定输出低CL = 0;/PCA的16位计数器-低八位和高八位CH = 0;CR = 1;/启动PCA定时器void delay_1us(uchar x)uchar i,j;for(i=0;i<x;i+)for(j=0;j<120;j+);void delay_led(uchar x)uchar i,j;j = x;while(j-)for(i=0;i<100;i+)/时间再调整_nop_();void key_scan(void)uchar temp;P2

6、 = 0xff;temp = P2;temp = temp|0x0f;if(temp=0x0f) /检测是否有按键按下/=启动 停止 key1if(key1=0)delay_1us(10);if(key1=0)if(run_flag=1)run_flag = 0;/stopelserun_flag = 1; /start/=正转 反转 key2if(key2=0)delay_1us(10);if(key2=0)if(direction_flag=1)direction_flag = 0;/正elsedirection_flag = 1;/反/=up key3if(key3=0)delay_1u

7、s(10);if(key2=0)if(count=0)count = 0;elsecount-;/=down key4if(key4=0)delay_1us(10);if(key2=0)if(count=255)count = 255;elsecount+;/=void M_run(void)uchar i,temp;if(run_flag=0)/stop/=不转CCAP0H = 0XFF;CCAP0L = 0XFF;/占空比为0% CCAP1H = 0XFF;CCAP1L = 0XFF;/占空比为0%/= led_display 不转，灯不亮temp = 0x00;P1 = temp;if(run_flag=1) /runtemp = 0xff;CY = 0;if(direction_flag=0)/正转CCAP0H = 0XFF;CCAP0L = 0XFF;/占空比为0% CCAP1H = count;CCAP1L = count;/= led_displayfor(i=0;i<8;i+)P1 = temp;temp = temp<<1;delay_led(count);if(direction_flag=1)/反转CCAP1H = 0XFF;CCAP1L =