C51直流电机PWM测速源程序

#include <reg51.h> #include <math.h> #define uchar unsigned char #define uint unsigned int #define ON 0 #define OFF 1 sbit PWM=P3^5; sbit MP=P3^4; bit FLAG=0; uchar code dispbit[6]= { 0x20,0x10,0x08,0x04,0x02,0x01 } ; uchar code seg[]= { 0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90 } ; //0,1,2,3,4,5,6,7,8,9 uchar disbuf[6]= { 0,0,0,0,10,10 } ; uint temp[6]; uint discount=0; uint timecount=0; //定时的次数 uint T0count=0; uint hus=0; uint k=60; uint Vc; uint Vs; uint tm=3000; uint x; void t0_serv()interrupt 1 { T0count++; } void t1_serv()interrupt 3 { PWM=1; TH1=(65536-tm)/256; TL1=(65536-tm)%256; hus++; if(hus==tm) { PWM=0; TH1=(25536+tm)/256; TL1=(25536+tm)%256; } timecount++; if(timecount==250) { //FLAG=1; TR0=0; hus=0; timecount=0; Vc=T0count*65536+TH0*256+TL0; Vs=144; if(abs(Vc-Vs)>5) { tm=abs(k*(Vc-Vs)); T0count=0; TR0=1; TR1=1; ET0=1; ET1=1; EA=1; } FLAG=1; TR0=0; timecount=0; } P0=dispbit[discount]; P1=seg[disbuf[discount]]; discount++; if(discount==6) { discount=0; } } void main() { uint i; TMOD=0x15; TH0=0; TL0=0; TH1=(65536-tm)/256; TL1=(65536-tm)%256; TR0=1; TR1=1; ET0=1; ET1=1; EA=1; while(1) { if(FLAG==1) { FLAG=0; x=T0count*65536+TH0*256+TL0; for(i=0;i<6;i++) { temp[i]=0; } i=0; while(x/10) { temp[i]=x%10; x=x/10; i++; } temp[i]=x; for(i=0;i<6;i++) { disbuf[i]=temp[i]; } timecount=0; T0count=0; TH0=0; TL0=0; T0count=0; TR0=1; } } }