电子设计与单片机应用实训教程代码第十二章

1：简单的单向电动机控制（单片机）：#include<reg52.h> //头文件sbitIN1=P2^3; //电动机控制口为P2^3intnum=0;voidInit();intmain(){ Init(); while(1)}voidInit() //定时器初始化函数{ TMOD=0x01; //定时器0以模式1工作 TH0=(65536-100)/256; TL0=(65536-100)%256; EA=1; ET0=1; TR0=1;}voidTimer_0(void)interrupt1{ TH0=(65536-100)/256; TL0=(65536-100)%256; num++; if(num<=10)//占空比的设定，此处为50% IN1=1; else IN1=0; if(num>20) //周期 num=0;}2：控制电动机的正/反转（单片机）：#include<reg52.h>#defineucharunsignedchar#defineuintunsignedintsbitA1=P2^4;sbitA2=P2^5;sbitB1=P2^6;sbitB2=P2^7;ucharjsa=0,jsb=0,sd=0,key=0,zf=0,off=0,PWM_bai=0,PWM_shi=0,PWM_ge=0;uintus_1X=0,PWM_jsa=0,PWM_jsb=0;voidT0_time()interrupt1{ TH0=(65536-1)/256; //1us加一次TL0=(65536-1)%256; //2KHz us_1X++; if(us_1X>500) //定时器清空，重新开始 us_1X=0; } ucharcodetable1[]= //数码管显示{0x3f, //00x06,0x5b,0x4f,0x66,0x6d, //1-50x7d,0x07,0x7f,0x6f //6-9};voiddelay(ucharx){uchari,j;for(i=x;i>0;i--)for(j=110;j>0;j--);}voidPWM_xs(){ if(sd==0){ PWM_bai=jsa/100; PWM_shi=jsa/10%10; PWM_ge=jsa%10;}if(sd==1){PWM_bai=jsb/100;PWM_shi=jsb/10%10;PWM_ge=jsb%10;} P1=0xfb; //数码管显示 P0=table1[PWM_bai]; delay(1); P1=0xfd; P0=table1[PWM_shi]; delay(1);P1=0xfe; P0=table1[PWM_ge]; delay(1);}voidjianpan() //矩阵键盘{uchartemp;P3=0xfe;temp=P3;temp=temp&0xfc;if(temp!=0xfc){delay(20);temp=P3;temp=temp&0xfc;if(temp!=0xfc){temp=P3;switch(temp){ case0xfa: if(sd==0) {jsa=jsa+10; if(jsa>100) jsa=0; } if(sd==1) { jsb=jsb+10; if(jsb>100) jsb=0; } break; case0xf6: sd++; off=1;break;}while(temp!=0xfc) //松手检测{temp=P3;temp=temp&0xfc;}}}P3=0xfd;temp=P3;temp=temp&0xfc;if(temp!=0xfc){delay(20);temp=P3;temp=temp&0xfc;if(temp!=0xfc){temp=P3;switch(temp){ case0xf9: key++;break; case0xf5: zf++; if(zf>2) zf=1; off=0;break;} while(temp!=0xfc) //松手检测{temp=P3;temp=temp&0xfc;}}}}voidmain(){ TMOD=0X01; TH0=(65536-1)/256; TL0=(65536-1)%256; EA=1; //定时器开启 ET0=1; TR0=1; while(1) { jianpan(); PWM_xs(); if(key==2) { P1=0xff; jsa=0,jsb=0,sd=0,key=0,zf=0,off=0,PWM_bai=0,PWM_shi=0,PWM_ge=0; us_1X=0,PWM_jsa=0,PWM_jsb=0; } PWM_jsa=jsa*5; PWM_jsb=jsb*5; if(key==1) P0=0xff; while(key==1) { jianpan(); while(key==1&&zf==1) { jianpan(); if(off==1) { P1=0xff; } if(off==0) { A2=0; B2=0; if(us_1X>=0&&us_1X<PWM_jsa) //0%-PWM_jsa高电平 A1=1; if(us_1X>PWM_jsa&&us_1X<=500) //PWM_jsa-100%低电平 A1=0; if(us_1X>=0&&us_1X<PWM_jsb) //0%-PWM_jsb高电平 B1=1; if(us_1X>PWM_jsb&&us_1X<=500) //PWM_jsb-100%低电平 B1=0; } }while(key==1&&zf==2) { jianpan(); if(off==1) { P1=0xff; } if(off==0) { A1=0; B1=0; if(us_1X>=0&&us_1X<PWM_jsa) //0%-PWM_jsa高电平 A2=1; if(us_1X>PWM_js