adc.c

无线单片机CC1110的一些使用源代码

#include "iocc1110.h"
#include "hal.h"



/*****************************************
//开始AD并得到一个AD结果
*****************************************/
/*
INT16 halAdcSampleSingle(BYTE reference, BYTE resolution, UINT8 input) {
    BYTE volatile temp;
    INT16 value;
    ADCCFG |= 0x02;
    ADCCON1 |= 0x30;
    ADCCON3 = (reference | resolution | input);

    while (!(ADCCON1 & 0x80));

    ADCCFG &= ~0x02;

    value = ADCL;
    value |= (((INT16)ADCH) << 8);
    if(value <= 0)
    {
      value = 0;
    }
    return value;
}
*/

/**/
INT16 halAdcSampleSingle(BYTE reference, BYTE resolution, UINT8 input) {
    BYTE volatile temp;
    INT16 value;

    //reading out any old conversion value
    temp = ADCH;
    temp = ADCL;


    ADC_ENABLE_CHANNEL(input);

    ADC_STOP();

  //  halWait(5);
    asm("nop");

    ADC_SINGLE_CONVERSION(reference | resolution | input);

    while (!ADC_SAMPLE_READY());

    ADC_DISABLE_CHANNEL(input);

    value = ADCL;
    value |= (((INT16)ADCH) << 8);

    if(value & 0x8000)
    {
		value = ~value + 1;
    }

    switch(resolution)
    {
    case ADC_7_BIT:
      value >>= 9;
      break;
    case ADC_9_BIT:
      value >>= 7;
      break;
    case ADC_10_BIT:
      value >>= 6;
      break;
    case ADC_12_BIT:
      value >>= 4;
      break;
    }

	asm("nop");
	asm("nop");
    return value;
    //return 0x38;
}
/**/