51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
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/*---------------------------------------------------------------------------------*/
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/* --- STC MCU International Limited -------------------------------------
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*/
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/* --- STC 15 Series MCU A/D Conversion Demo -----------------------
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*/
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/* --- Mobile: (86)13922805190 --------------------------------------------
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*/
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/* --- Fax: 86-755-82944243 -------------------------------------------------*/
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/* --- Tel: 86-755-82948412 -------------------------------------------------
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*/
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/* --- Web: www.STCMCU.com --------------------------------------------
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*/
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/* If you want to use the program or the program referenced in the ---*/
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/* article, please specify in which data and procedures from STC ---
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*/
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/*----------------------------------------------------------------------------------*/
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#include "stc15.h"
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#include "adc.h"
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/*----------------------------
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Initial ADC sfr
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----------------------------*/
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void InitADC(uint8_t chan)
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{
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P1ASF |= 1 << chan; //enable channel ADC function
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ADC_RES = 0; //Clear previous result
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ADC_CONTR = ADC_POWER | ADC_SPEEDLL;
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//Delay(2); //ADC power-on and delay
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}
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/*----------------------------
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Get ADC result - 10 bit
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----------------------------*/
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uint16_t getADCResult(uint8_t chan)
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{
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uint8_t upper8;
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upper8 = getADCResult8(chan);
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return upper8 << 2 | (ADC_RESL & 0b11) ; //Return ADC result, 10 bits
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}
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uint8_t getADCResult8(uint8_t chan)
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{
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ADC_CONTR = ADC_POWER | ADC_SPEEDHH | ADC_START | chan;
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_nop_; //Must wait before inquiry
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while (!(ADC_CONTR & ADC_FLAG)); //Wait complete flag
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ADC_CONTR &= ~ADC_FLAG; //Close ADC
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return ADC_RES; //Return ADC result, 8 bits
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}
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