vol_test.rar_51 电压_单片机电压表_数码管 电压_数码管电压表

#include<reg51.h> #include<intrins.h> #define FOSC 18432000L #define BAUD 9600 typedef unsigned char BYTE; typedef unsigned int WORD; sfr ADC_CONTR = 0XBC; sfr ADC_RES = 0XBD; sfr ADC_LOW2 = 0XBE; sfr P1ASF = 0X9D; BYTE sh[3]="0",RES,ch; WORD t; BYTE code shu[]={0XC0,0XF9,0XA4,0XB0,0X99,0X92,0X82,0XF8,0X80,0X90}; BYTE code shu_zs[]={0X40,0X79,0X24,0X30,0X19,0X12,0X02,0X78,0X00,0X10}; #define ADC_POWER 0X80 #define ADC_FLAG 0X10 #define ADC_START 0X08 #define ADC_SPEEDLL 0X00 #define ADC_SPEEDL 0X20 #define ADC_SPEEDH 0X40 #define ADC_SPEEDHH 0X60 void InitADC(); void display(); sbit P27=P2^7; sbit P26=P2^6; sbit P25=P2^5; void delayus(WORD i) { while(i--); } void display() // 数码管显示 { float ADC_value; WORD value; ADC_value=RES*5/256; value=ADC_value*100; sh[0]=value/100; sh[1]=value%100/10; sh[2]=value%10; P2=0xFE; //整数部分 P0=shu_zs[sh[0]]; delayus(200); P2=0xFD; //第一位小数 P0=shu[sh[1]]; delayus(200); P2=0xFB; //第二位小数 P0=shu[sh[2]]; delayus(200); } void main() { InitADC(); IE=0XA0; while(1) display(); } void adc_isr() interrupt 5 using 1 { ADC_CONTR=0X00; t++; if(t==30000) { t=0; RES=ADC_RES; } ch=0; ADC_CONTR = ADC_POWER | ADC_SPEEDLL | ADC_START | ch; } void InitADC() { P1ASF = 0XFF; ADC_RES = 0; ADC_CONTR = 0X00|ADC_POWER | ADC_SPEEDLL | ADC_START | ch; delayus(10000); }