單片機(jī)測(cè)量電壓的程序

1、主要程序如下：#include "stc15.h"#define FOSC 11059200L /系統(tǒng)頻率#define BAUD 115200 /串口波特率sbit P23 =P23; sbit P22 =P22;sbit P21 =P21;unsigned char dataH,dataL;unsigned int Volut,Shangxian,Xiaxian;unsigned char Recieve4;unsigned char i=0,m=0;unsigned char time0count;unsigned char qian,bai,shi,ge;bit t

2、hflag=0;void SendData(unsigned char dat) SBUF = dat; /寫(xiě)數(shù)據(jù)到UART數(shù)據(jù)寄存器while(TI=0);TI=0;void SendString(char *s) while (*s) /檢測(cè)字符串結(jié)束標(biāo)志 SendData(*s+); /發(fā)送當(dāng)前字符 void ClearAll(unsigned char *p) char n; for(n=0;n<5;n+) *p+=' 'void delay(int z) int x,y; for(x=z;x>0;x-) for(y=10000;y>0;y-);/*-

3、*/void main(void) P21=1; /初始化LED21滅 P22=1; /初始化LED22滅 Shangxian=500; Xiaxian=100;/SCON = 0x50; /8位可變波特率 AUXR = 0x40; /定時(shí)器1為1T模式TMOD = 0x00; /定時(shí)器1為模式0(16位自動(dòng)重載)TL1 = (65536 - (FOSC/4/BAUD); /設(shè)置波特率重裝值 TH1 = (65536 - (FOSC/4/BAUD)>>8;TR1 = 1; /定時(shí)器1開(kāi)始啟動(dòng) ES = 1; /使能串口中斷/ ADC_CONTR|=0X80;delay(1);P1A

4、SF=0x04; /P12為模擬量輸入口ADC_CONTR=0x82;CLK_DIV|=0x20;delay(1);/TH0= (65536-50000)/256; /定時(shí)50msTL0= (65536-50000)%256; /定時(shí)50msTR0=1;/使能定時(shí)器0ET0= 1;/使能定時(shí)器0中斷time0count=0;EA = 1; /開(kāi)總中斷/ while(1) if(thflag)thflag=0;ADC_CONTR|=0X08;/啟動(dòng)轉(zhuǎn)換while(!(ADC_CONTR&0x10);ADC_CONTR&=0xE7; /轉(zhuǎn)換結(jié)束標(biāo)志位清零dataL=ADC_RESL

5、;dataH=ADC_RES&0x03;Volut=(dataH*256+dataL); qian =Volut/1000 +48;bai=Volut/100%10+48;shi=Volut/10%10+48;ge=Volut%10+48;SendData(qian); SendData(bai);SendData(shi); SendData(ge);SendData(' '); /*-定時(shí)器0 中斷服務(wù)程序-*/ void T0_ISR (void) interrupt 1 i=0; thflag=1; time0count+; if(time0count=10)

6、P23=P23;time0count=0; if(Volut>Shangxian) P21=P21; else if(Volut<Xiaxian) P22=P22; else P21=1;P22=1; /*-UART 中斷服務(wù)程序-*/void Uart() interrupt 4 if (RI) RI=0; Recievem=SBUF; m+; if(m=4) unsigned int tempp=(Recieve1-48)*100+(Recieve2-48)*10+(Recieve3-48); if(Recieve0='r') Shangxian=tempp; SendString("n設(shè)置上限為：");SendData(Recieve1);SendData(Recieve2);SendData(Recieve3);SendData('n'); if(Recieve0='d') Xiaxian=tempp; SendString("n設(shè)置下限為：")