爆改直流电机，DA转换器

main.c

#include <REGX52.H>
#include "Delay.h"
#include "Timer0.h"sbit DA=P2^1;unsigned char Counter,Compare;	//计数值和比较值，用于输出PWM
unsigned char i;void main()
{Timer0_Init();while(1){for(i=0;i<100;i++){Compare=i;			//设置比较值，改变PWM占空比Delay(10);}for(i=100;i>0;i--){Compare=i;			//设置比较值，改变PWM占空比Delay(10);}}
}void Timer0_Routine() interrupt 1
{TL0 = 0x9C;		//设置定时初值TH0 = 0xFF;		//设置定时初值Counter++;Counter%=100;	//计数值变化范围限制在0~99if(Counter<Compare)	//计数值小于比较值{DA=1;		//输出1}else				//计数值大于比较值{DA=0;		//输出0}
}

Delay.c

void Delay(unsigned int xms)
{unsigned char i, j;while(xms--){i = 2;j = 239;do{while (--j);} while (--i);}
}

Delay.h

#ifndef __DELAY_H__
#define __DELAY_H__void Delay(unsigned int xms);#endif

Timer0.c

#include <REGX52.H>/*** @brief  定时器0初始化，100us@12.000MHz* @param  无* @retval 无*/
void Timer0_Init(void)
{TMOD &= 0xF0;		//设置定时器模式TMOD |= 0x01;		//设置定时器模式TL0 = 0x9C;		//设置定时初值TH0 = 0xFF;		//设置定时初值TF0 = 0;		//清除TF0标志TR0 = 1;		//定时器0开始计时ET0=1;EA=1;PT0=0;
}/*定时器中断函数模板
void Timer0_Routine() interrupt 1
{static unsigned int T0Count;TL0 = 0x9C;		//设置定时初值TH0 = 0xFF;		//设置定时初值T0Count++;if(T0Count>=1000){T0Count=0;}
}
*/

Timer0.h

#ifndef __TIMER0_H__
#define __TIMER0_H__void Timer0_Init(void);#endif