STC12C5A60S2内部AD+LCD1602显示

/*------------------------------------------------------------------*/ /* --- STC MCU Limited ---------------------------------------------*/ /* --- STC12C5Axx Series MCU A/D Conversion Demo -------------------*/ /* --- Mobile: (86)13922805190 -------------------------------------*/ /* --- Fax: 86-0513-55012956,55012947,55012969 ---------------------*/ /* --- Tel: 86-0513-55012928,55012929,55012966----------------------*/ /* --- Web: www.STCMCU.com -----------------------------------------*/ /* --- Web: www.GXWMCU.com -----------------------------------------*/ /* If you want to use the program or the program referenced in the */ /* article, please specify in which data and procedures from STC */ /*------------------------------------------------------------------*/ #include "reg51.h" #include "intrins.h" #include "lcd.h" #define FOSC 11059200L #define BAUD 9600 typedef unsigned char BYTE; typedef unsigned int WORD; /*Declare SFR associated with the ADC */ sfr ADC_CONTR = 0xBC; //ADC control register sfr ADC_RES = 0xBD; //ADC high 8-bit result register sfr ADC_LOW2 = 0xBE; //ADC low 2-bit result register sfr P1ASF = 0x9D; //P1 secondary function control register /*Define ADC operation const for ADC_CONTR*/ #define ADC_POWER 0x80 //ADC power control bit #define ADC_FLAG 0x10 //ADC complete flag #define ADC_START 0x08 //ADC start control bit #define ADC_SPEEDLL 0x00 //420 clocks #define ADC_SPEEDL 0x20 //280 clocks #define ADC_SPEEDH 0x40 //140 clocks #define ADC_SPEEDHH 0x60 //70 clocks void InitADC(); BYTE GetADCResult(BYTE ch); void Delay(WORD n); void main() { int Volt; LcdInit(); InitADC(); //Init ADC sfr while (1) { Volt=(float)GetADCResult(0)*5*100/256; LcdWriteCom(0x80); //电压显示 LcdWriteData('0'+Volt%1000/100); LcdWriteData('.'); LcdWriteData('0'+Volt%100/10); LcdWriteData('0'+Volt%10); LcdWriteData('V'); } } /*---------------------------- Get ADC result ----------------------------*/ BYTE GetADCResult(BYTE ch) { ADC_CONTR = ADC_POWER | ADC_SPEEDLL | ch | ADC_START; _nop_(); //Must wait before inquiry _nop_(); _nop_(); _nop_(); while (!(ADC_CONTR & ADC_FLAG));//Wait complete flag ADC_CONTR &= ~ADC_FLAG; //Close ADC return ADC_RES; //Return ADC result } /*---------------------------- Initial ADC sfr ----------------------------*/ void InitADC() { P1ASF = 0xff; //Open 8 channels ADC function ADC_RES = 0; //Clear previous result ADC_CONTR = ADC_POWER | ADC_SPEEDLL; Delay(2); //ADC power-on and delay } /*---------------------------- Software delay function ----------------------------*/ void Delay(WORD n) { WORD x; while (n--) { x = 5000; while (x--); } }