ADC查询模式.zip_奇葩

#include "reg51.h" #include "intrins.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 InitUart(); void InitADC(); void SendData(BYTE dat); BYTE GetADCResult(BYTE ch); void Delay(WORD n); void ShowResult(BYTE ch); void main() { InitUart(); //Init UART, use to show ADC result InitADC(); //Init ADC sfr while (1) { ShowResult(0); //Show Channel0 // ShowResult(1); //Show Channel1 // ShowResult(2); //Show Channel2 // ShowResult(3); //Show Channel3 // ShowResult(4); //Show Channel4 // ShowResult(5); //Show Channel5 // ShowResult(6); //Show Channel6 // ShowResult(7); //Show Channel7 Delay(100); } // while(1); } /*---------------------------- Send ADC result to UART ----------------------------*/ void ShowResult(BYTE ch) { SendData(ch); //Show Channel NO. SendData(GetADCResult(ch)); //Show ADC high 8-bit result //if you want show 10-bit result, uncomment next line SendData(ADC_LOW2); //Show ADC low 2-bit result } /*---------------------------- 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 UART ----------------------------*/ void InitUart() { SCON = 0x5a; //8 bit data ,no parity bit TMOD = 0x20; //T1 as 8-bit auto reload TH1 = TL1 = -(FOSC/12/32/BAUD); //Set Uart baudrate TR1 = 1; //T1 start running } /*---------------------------- Initial ADC sfr ----------------------------*/ void InitADC() { P1ASF = 0x01; //Open 8 channels ADC function ADC_RES = 0; //Clear previous result ADC_CONTR = ADC_POWER | ADC_SPEEDLL; Delay(2); //ADC power-on and delay } /*---------------------------- Send one byte data to PC Input: dat (UART data) Output:- ----------------------------*/ void SendData(BYTE dat) { while (!TI); //Wait for the previous data is sent TI = 0; //Clear TI flag SBUF = dat; //Send current data } /*---------------------------- Software delay function ----------------------------*/ void Delay(WORD n) { WORD x; while (n--) { x = 5000; while (x--); } }