adcsamplesingle.c

来自「CC1110点对多点FDMA传输方式C源码」· C语言 代码 · 共 84 行

/******************************************************************************
*                                                                             *
*    ****       ******       ****
*     ****     ********     ****
*      ****   ****  ****   ****
*       **** ****    **** ****              wxl
*        *******      *******
*         *****        *****                    成都无线龙通讯科技有限公司
*                                                                             *
*******************************************************************************
Target:       cc1110                          使用芯片:       cc1110
Author:       WXL                             程 序 员：      无线龙
data:         1/12-2007                       日    期：      1/12-2007
******************************************************************************/
/**********************************头文件**************************************/
#include "hal.h"
/*
//-----------------------------------------------------------------------------
// See hal.h for a description of this function.
//-----------------------------------------------------------------------------
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();

    ADC_SINGLE_CONVERSION(reference | resolution | input);

    while (!ADC_SAMPLE_READY());

    ADC_DISABLE_CHANNEL(input);

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

    ADC_STOP();

    resolution >>= 3;
    return value >> (8 - resolution);
}*/

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);

    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;
    }

    resolution >>= 3;
    value >>= (7 - resolution);
	asm("nop");
	asm("nop");
    return value;
}