基于51单片机的直流电机pwm闭环控制实验

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1、基于51单片机的直流电机PWM闭环控制实验   从光驱上拆了一个直流电机组件(这种服务器上用的光驱很难找)，有现成的码盘和光耦，给它配了一个板子很方便就成了我的直流电机的实验模块，再配上小键盘和显示模块，我的单片机闭环控制直流电机的一个实验装置就这样OK了。   先键入转速，按#键确认，开始启动电机，显示屏实时显示电机转速，可看到转速在所设数值上下摆动，最后稳定在20左右的摆幅。   其C语言程序如下：#include#defineDIGPORTP2#defineWORDPORTP0#defineKEYPORTP1#defineuin

2、tunsignedint#defineucharunsignedchar#defineuongunsignedlongsbitP_7=P3^7;bitOVER;uintk,dt;uongKEYNUM;ucharqu,NUM;voidDelay(uintms){            while(--ms);}voidtimer0(void)interrupt1using1{           TL0=-(10248%256);           TH0=-(10248%256);           NUM+=1;           if(NUM

3、>=10){             TR1=0;             TR0=0;             OVER=1;           }}uintCK(void){           uintnumber=0;           P_7=1;           OVER=0;NUM=0;           EA=1;ET0=1;           TH0=(10203/256);           TH0=(10203%256);           TH1=0;           TL1=0;           TMO

4、D=0x51;           TR0=1;           TR1=1;           Delay(dt);           P_7=0;           while(!OVER);           OVER=0;           number=TH1*256+TL1;           return(number);}voidDisplay_LED(uongnu){           uintii=0;           uongaa,bb;           uintxx[]={-0x10,-0x10,-0x

5、10,-0x10,-0x10,-0x10,-0x10,-0x10};           do           {             bb=nu/10;             aa=nu-bb*10;             xx[ii]=aa;             nu=bb;ii++;           }while(nu>0);           DIGPORT=0xf0;WORDPORT=0x30+xx[0];           DIGPORT=0xf1;WORDPORT=0x30+xx[1];           DIG

6、PORT=0xf2;WORDPORT=0x30+xx[2];           DIGPORT=0xf3;WORDPORT=0x30+xx[3];           DIGPORT=0x0f;WORDPORT=0x30+xx[4];           DIGPORT=0x1f;WORDPORT=0x30+xx[5];           DIGPORT=0x2f;WORDPORT=0x30+xx[6];           DIGPORT=0x3f;WORDPORT=0x30+xx[7];}voidgetkey(){       qu=0;k=0

7、;       KEYNUM=0;       do       {           switch(KEYPORT)           {             case0xbd:               KEYNUM=KEYNUM*10;               break;             case0xf6:                KEYNUM=KEYNUM*10+1;                break;             case0xf5:                KEYNUM=KEYNUM*1

8、0+2;                break;             case0xf3