hal_adc_sample_single.c

来自「zigbee location examples」· C语言 代码 · 共 27 行

#include "mac_headers.h"

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;

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