基于ADC0809和51单片机的5路电压采集器

/*--------------------------------------------------------------------------------------------------------------- * @file: adc.c * @brief: ADC0809驱动模块和转换模块 * @details: * @author: lfy * @date: 2014/06/26 * @version: adc * @par copyright: *-----------------------------------------------------------------------------------------*/ /* * 硬件连接: * ADDA ADDB ADDC---P0^4~~P0^6; * ALE和START---P0^0; * EOC----P0^2; * OE---P0^3; * CLK---P0^0; * * */ #include "include.h" sbit CLK=P0^0; sbit START=P0^1; sbit EOC=P0^2; sbit OE=P0^3; sbit ADA=P0^4; sbit ADB=P0^5; sbit ADC=P0^6; unsigned char Value=0; /*记录每次按键时候采集到的某路的AD转换的值*/ unsigned char Cnt=0;/*记录是第几路AD转换*/ unsigned int All_Value=0;/*统计总共五次转换的和*/ /*------------------------------------ * Name: void Inter_Init(void) * Desprition: 定时器0和定时器1的初始化,定时器0提供80us的周期方波信号作为ADC的CLK,定时器1提供50ms的AD转换频率 * In: * Out: * Author: lfy * Date: 2014/06/26 *------------------------------------*/ void Inter_Init(void) { ET0=1; ET1=1; /*定时器0以方式二自动重装产生40us的脉冲作为ADC的CLK,定时器1作为ADC转换频率为50ms转换一次*/ TMOD=0x12; TH0=0xd8; TL0=0xd8; TH1=0x3c; TL1=0xaf; TR0=1; TR1=1; EA=1; } /*------------------------------------ * Name: void Disp_ADCResult(unsigned char val) * Desprition: * In: 最近一次AD转换结果或者是中值滤波的结果 * Out:显示当前AD值 * Author: lfy * Date: 2014/06/15 *------------------------------------*/ void Disp_ADCResult(unsigned char val) { char str[11]={0}; float tmp; unsigned int i=0,j=0; str[0]=Cnt+0x30;/*='1'*/ str[1]=':'; str[2]=' '; tmp=val*0.0196;/*除法改为乘法,0，0196=5/255 */ i=tmp*10000; j=i/10000; j+=0x30; str[3]=j;/*取第一位,及个位*/ str[4]='.'; j=i/1000%10;/*小数点第一位*/ j+=0x30; str[5]=j; j=i/100%10; j+=0x30; str[6]=j; j=i/10%10; j+=0x30; str[7]=j; j=i%10; j+=0x30; str[8]=j; str[9]='v'; str[10]='\0'; LCD_WriteStr(0 , 0 , str); } /*------------------------------------ * Name: void CarryOnceAD(void) * Desprition: 每50ms执行一次AD转换,每次按键时获取最近一次采集的AD转换的结果 * In: * Out: AD转换之后的8位无符号字符数据(未处理) * Author: lfy * Date: 2014/06/26 *------------------------------------*/ void CarryOnceAD(void) { ADA=Cnt&0x04; ADB=Cnt&0x02; ADC=Cnt&0x01; START=0; START=1; Delayms(5); START=0; Delayms(1); //while(!EOC); OE=1; Value=P2; OE=0; } void ET0_Inter() interrupt 1 { CLK=~CLK; } void ET1_Inter() interrupt 3 { TH1=0x3c; TL1=0xaf; CarryOnceAD(); }