STM32F103 - 配置规则通道参数 - 05 - unfinished -unfinished-unfinished

五 、配置规则通道参数

//设置指定ADC的规则组通道，一个序列，采样时间   常规通道配置
ADC_RegularChannelConfig(ADC1, ch, 1, ADC_SampleTime_239Cycles5 );    //ADC1,ADC通道,采样时间为239.5周期  

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void ADC_RegularChannelConfig(ADC_TypeDef* ADCx, uint8_t ADC_Channel, uint8_t Rank, uint8_t ADC_SampleTime)
{
  uint32_t tmpreg1 = 0, tmpreg2 = 0;
  assert_param(IS_ADC_ALL_PERIPH(ADCx));    /* 检查参数 */
  assert_param(IS_ADC_CHANNEL(ADC_Channel));
  assert_param(IS_ADC_REGULAR_RANK(Rank));
  assert_param(IS_ADC_SAMPLE_TIME(ADC_SampleTime));
 
  if (ADC_Channel > ADC_Channel_9)    /* if ADC_Channel_10 ... ADC_Channel_17 is selected */
  {
    tmpreg1 = ADCx->SMPR1;  /* Get the old register value */
    tmpreg2 = SMPR1_SMP_Set << (3 * (ADC_Channel - 10));    /* Calculate the mask to clear */   
    tmpreg1 &= ~tmpreg2;    /* Clear the old channel sample time */    
    tmpreg2 = (uint32_t)ADC_SampleTime << (3 * (ADC_Channel - 10));    /* Calculate the mask to set */    
    tmpreg1 |= tmpreg2;    /* Set the new channel sample time */   
    ADCx->SMPR1 = tmpreg1;    /* Store the new register value */
  }
  else    /* ADC_Channel include in ADC_Channel_[0..9] */
  {
    tmpreg1 = ADCx->SMPR2;    /* 获取旧的寄存器值 */   
    tmpreg2 = SMPR2_SMP_Set << (3 * ADC_Channel);    /* 计算掩码以清除 */
    tmpreg1 &= ~tmpreg2;    /* 清除旧通道的采样时间 */   
    tmpreg2 = (uint32_t)ADC_SampleTime << (3 * ADC_Channel);    /* 计算要设置的掩码 */    
    tmpreg1 |= tmpreg2;    /* 设置新通道采样时间 */    
    ADCx->SMPR2 = tmpreg1;    /* 存储新的寄存器值 */
  }
  
  if (Rank < 7)    /* For Rank 1 to 6 */
  {
    tmpreg1 = ADCx->SQR3;/* Get the old register value */
    tmpreg2 = SQR3_SQ_Set << (5 * (Rank - 1));/* Calculate the mask to clear */
    tmpreg1 &= ~tmpreg2;/* Clear the old SQx bits for the selected rank */
    tmpreg2 = (uint32_t)ADC_Channel << (5 * (Rank - 1));/* Calculate the mask to set */
    tmpreg1 |= tmpreg2;/* Set the SQx bits for the selected rank */
    ADCx->SQR3 = tmpreg1;/* Store the new register value */
  }
  
  else if (Rank < 13)/* For Rank 7 to 12 */
  {
    tmpreg1 = ADCx->SQR2;/* Get the old register value */
    tmpreg2 = SQR2_SQ_Set << (5 * (Rank - 7));/* Calculate the mask to clear */
    tmpreg1 &= ~tmpreg2;/* Clear the old SQx bits for the selected rank */
    tmpreg2 = (uint32_t)ADC_Channel << (5 * (Rank - 7));/* Calculate the mask to set */
    tmpreg1 |= tmpreg2;/* Set the SQx bits for the selected rank */
    ADCx->SQR2 = tmpreg1;/* Store the new register value */
  }
  
  else/* For Rank 13 to 16 */
  {
    tmpreg1 = ADCx->SQR1;/* Get the old register value */
    tmpreg2 = SQR1_SQ_Set << (5 * (Rank - 13));/* Calculate the mask to clear */
    tmpreg1 &= ~tmpreg2;/* Clear the old SQx bits for the selected rank */
    tmpreg2 = (uint32_t)ADC_Channel << (5 * (Rank - 13));/* Calculate the mask to set */
    tmpreg1 |= tmpreg2;/* Set the SQx bits for the selected rank */
    ADCx->SQR1 = tmpreg1;/* Store the new register value */
  }
}

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