关于CC2530 ADC采样

我遇到一个奇葩问题，我的程序是这样的  P0_1 = 1; P0_5 = 0; powerSrcVoltage = HalAdcRead (HAL_ADC_CHANNEL_2, HAL_ADC_RESOLUTION_8);//只要加ADC采样这句话 P0_1， P0_5的配置好像就被AD的配置覆盖了，输出值都变成0了，如果把ADC注释掉就没问题，请问这怎么回事

应该没影响啊。建议提供下相关的代码。

 HalAdcRead (HAL_ADC_CHANNEL_2, HAL_ADC_RESOLUTION_8)的函数如下：

uint16 HalAdcRead (uint8 channel, uint8 resolution)
{
  int16  reading = 0;

#if (HAL_ADC == TRUE)

  uint8   i, resbits;
  uint8   adctemp;
  volatile  uint8 tmp;
  uint8  adcChannel = 1;
  uint8  reference;

  /* store the previously set reference voltage selection */
  reference = ADCCON3 & HAL_ADC_REF_BITS;

  /*
  * If Analog input channel is AIN0..AIN7, make sure corresponing P0 I/O pin is enabled.  The code
  * does NOT disable the pin at the end of this function.  I think it is better to leave the pin
  * enabled because the results will be more accurate.  Because of the inherent capacitance on the
  * pin, it takes time for the voltage on the pin to charge up to its steady-state level.  If
  * HalAdcRead() has to turn on the pin for every conversion, the results may show a lower voltage
  * than actuality because the pin did not have time to fully charge.
  */
  if (channel < 8)
  {
    for (i=0; i < channel; i++)
    {
      adcChannel <<= 1;
    }
  }

  /* Enable channel */
  ADCCFG |= adcChannel;

  /* Convert resolution to decimation rate */
  switch (resolution)
  {
    case HAL_ADC_RESOLUTION_8:
      resbits = HAL_ADC_DEC_064;
      break;
    case HAL_ADC_RESOLUTION_10:
      resbits = HAL_ADC_DEC_128;
      break;
    case HAL_ADC_RESOLUTION_12:
      resbits = HAL_ADC_DEC_256;
      break;
    case HAL_ADC_RESOLUTION_14:
    default:
      resbits = HAL_ADC_DEC_512;
      break;
  }

  /* read ADCL,ADCH to clear EOC */
  tmp = ADCL;
  tmp = ADCH;

  /* Setup Sample */
  adctemp = ADCCON3;
  adctemp &= ~(HAL_ADC_CHN_BITS | HAL_ADC_DEC_BITS | HAL_ADC_REF_BITS);
  adctemp |= channel | resbits | (reference);

  /* writing to this register starts the extra conversion */
  ADCCON3 = adctemp;

  /* Wait for the conversion to be done */
  while (!(ADCCON1 & HAL_ADC_EOC));

  /* Disable channel after done conversion */
  ADCCFG &= (adcChannel ^ 0xFF);

  /* Read the result */
  reading = (int16) (ADCL);
  reading |= (int16) (ADCH << 8);

  /* Treat small negative as 0 */
  if (reading < 0)
    reading = 0;

  switch (resolution)
  {
    case HAL_ADC_RESOLUTION_8:
      reading >>= 8;
      break;
    case HAL_ADC_RESOLUTION_10:
      reading >>= 6;
      break;
    case HAL_ADC_RESOLUTION_12:
      reading >>= 4;
      break;
    case HAL_ADC_RESOLUTION_14:
    default:
      reading >>= 2;
    break;
  }
#else
  // unused arguments
  (void) channel;
  (void) resolution;
#endif

  return ((uint16)reading);
}