stm32f10x_adc.c

诺基亚5110 LCD资料

* Function Name  : ADC_ResetCalibration
* Description    : Resets the selected ADC calibration registers.
* Input          : - ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
* Output         : None
* Return         : None
*******************************************************************************/
void ADC_ResetCalibration(ADC_TypeDef* ADCx)
{
  /* Check the parameters */
  assert_param(IS_ADC_ALL_PERIPH(ADCx));

  /* Resets the selected ADC calibartion registers */  
  ADCx->CR2 |= CR2_RSTCAL_Set;
}

/*******************************************************************************
* Function Name  : ADC_GetResetCalibrationStatus
* Description    : Gets the selected ADC reset calibration registers status.
* Input          : - ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
* Output         : None
* Return         : The new state of ADC reset calibration registers (SET or RESET).
*******************************************************************************/
FlagStatus ADC_GetResetCalibrationStatus(ADC_TypeDef* ADCx)
{
  FlagStatus bitstatus = RESET;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_PERIPH(ADCx));

  /* Check the status of RSTCAL bit */
  if ((ADCx->CR2 & CR2_RSTCAL_Set) != (u32)RESET)
  {
    /* RSTCAL bit is set */
    bitstatus = SET;
  }
  else
  {
    /* RSTCAL bit is reset */
    bitstatus = RESET;
  }

  /* Return the RSTCAL bit status */
  return  bitstatus;
}

/*******************************************************************************
* Function Name  : ADC_StartCalibration
* Description    : Starts the selected ADC calibration process.
* Input          : - ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
* Output         : None
* Return         : None
*******************************************************************************/
void ADC_StartCalibration(ADC_TypeDef* ADCx)
{
  /* Check the parameters */
  assert_param(IS_ADC_ALL_PERIPH(ADCx));

  /* Enable the selected ADC calibration process */  
  ADCx->CR2 |= CR2_CAL_Set;
}

/*******************************************************************************
* Function Name  : ADC_GetCalibrationStatus
* Description    : Gets the selected ADC calibration status.
* Input          : - ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
* Output         : None
* Return         : The new state of ADC calibration (SET or RESET).
*******************************************************************************/
FlagStatus ADC_GetCalibrationStatus(ADC_TypeDef* ADCx)
{
  FlagStatus bitstatus = RESET;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_PERIPH(ADCx));

  /* Check the status of CAL bit */
  if ((ADCx->CR2 & CR2_CAL_Set) != (u32)RESET)
  {
    /* CAL bit is set: calibration on going */
    bitstatus = SET;
  }
  else
  {
    /* CAL bit is reset: end of calibration */
    bitstatus = RESET;
  }

  /* Return the CAL bit status */
  return  bitstatus;
}

/*******************************************************************************
* Function Name  : ADC_SoftwareStartConvCmd
* Description    : Enables or disables the selected ADC software start conversion .
* Input          : - ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
*                  - NewState: new state of the selected ADC software start conversion.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ADC_SoftwareStartConvCmd(ADC_TypeDef* ADCx, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_ADC_ALL_PERIPH(ADCx));
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected ADC conversion on external event and start the selected
       ADC conversion */
    ADCx->CR2 |= CR2_EXTTRIG_SWSTART_Set;
  }
  else
  {
    /* Disable the selected ADC conversion on external event and stop the selected
       ADC conversion */
    ADCx->CR2 &= CR2_EXTTRIG_SWSTART_Reset;
  }
}

/*******************************************************************************
* Function Name  : ADC_GetSoftwareStartConvStatus
* Description    : Gets the selected ADC Software start conversion Status.
* Input          : - ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
* Output         : None
* Return         : The new state of ADC software start conversion (SET or RESET).
*******************************************************************************/
FlagStatus ADC_GetSoftwareStartConvStatus(ADC_TypeDef* ADCx)
{
  FlagStatus bitstatus = RESET;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_PERIPH(ADCx));

  /* Check the status of SWSTART bit */
  if ((ADCx->CR2 & CR2_SWSTART_Set) != (u32)RESET)
  {
    /* SWSTART bit is set */
    bitstatus = SET;
  }
  else
  {
    /* SWSTART bit is reset */
    bitstatus = RESET;
  }

  /* Return the SWSTART bit status */
  return  bitstatus;
}

/*******************************************************************************
* Function Name  : ADC_DiscModeChannelCountConfig
* Description    : Configures the discontinuous mode for the selected ADC regular
*                  group channel.
* Input          : - ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
*                  - Number: specifies the discontinuous mode regular channel
*                    count value. This number must be between 1 and 8.
* Output         : None
* Return         : None
*******************************************************************************/
void ADC_DiscModeChannelCountConfig(ADC_TypeDef* ADCx, u8 Number)
{
  u32 tmpreg1 = 0;
  u32 tmpreg2 = 0;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_PERIPH(ADCx));
  assert_param(IS_ADC_REGULAR_DISC_NUMBER(Number));

  /* Get the old register value */
  tmpreg1 = ADCx->CR1;
  /* Clear the old discontinuous mode channel count */
  tmpreg1 &= CR1_DISCNUM_Reset;
  /* Set the discontinuous mode channel count */
  tmpreg2 = Number - 1;
  tmpreg1 |= tmpreg2 << 13;
  /* Store the new register value */
  ADCx->CR1 = tmpreg1;
}

/*******************************************************************************
* Function Name  : ADC_DiscModeCmd
* Description    : Enables or disables the discontinuous mode on regular group
*                  channel for the specified ADC
* Input          : - ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
*                  - NewState: new state of the selected ADC discontinuous mode
*                    on regular group channel.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ADC_DiscModeCmd(ADC_TypeDef* ADCx, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_ADC_ALL_PERIPH(ADCx));
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected ADC regular discontinuous mode */
    ADCx->CR1 |= CR1_DISCEN_Set;
  }
  else
  {
    /* Disable the selected ADC regular discontinuous mode */
    ADCx->CR1 &= CR1_DISCEN_Reset;
  }
}

/*******************************************************************************
* Function Name  : ADC_RegularChannelConfig
* Description    : Configures for the selected ADC regular channel its corresponding
*                  rank in the sequencer and its sample time.
* Input          : - ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
*                  - ADC_Channel: the ADC channel to configure. 
*                    This parameter can be one of the following values:
*                       - ADC_Channel_0: ADC Channel0 selected
*                       - ADC_Channel_1: ADC Channel1 selected
*                       - ADC_Channel_2: ADC Channel2 selected
*                       - ADC_Channel_3: ADC Channel3 selected
*                       - ADC_Channel_4: ADC Channel4 selected
*                       - ADC_Channel_5: ADC Channel5 selected
*                       - ADC_Channel_6: ADC Channel6 selected
*                       - ADC_Channel_7: ADC Channel7 selected
*                       - ADC_Channel_8: ADC Channel8 selected
*                       - ADC_Channel_9: ADC Channel9 selected
*                       - ADC_Channel_10: ADC Channel10 selected
*                       - ADC_Channel_11: ADC Channel11 selected
*                       - ADC_Channel_12: ADC Channel12 selected
*                       - ADC_Channel_13: ADC Channel13 selected
*                       - ADC_Channel_14: ADC Channel14 selected
*                       - ADC_Channel_15: ADC Channel15 selected
*                       - ADC_Channel_16: ADC Channel16 selected
*                       - ADC_Channel_17: ADC Channel17 selected
*                  - Rank: The rank in the regular group sequencer. This parameter
*                    must be between 1 to 16.
*                  - ADC_SampleTime: The sample time value to be set for the
*                    selected channel. 
*                    This parameter can be one of the following values:
*                       - ADC_SampleTime_1Cycles5: Sample time equal to 1.5 cycles
*                       - ADC_SampleTime_7Cycles5: Sample time equal to 7.5 cycles
*                       - ADC_SampleTime_13Cycles5: Sample time equal to 13.5 cycles
*                       - ADC_SampleTime_28Cycles5: Sample time equal to 28.5 cycles	
*                       - ADC_SampleTime_41Cycles5: Sample time equal to 41.5 cycles	
*                       - ADC_SampleTime_55Cycles5: Sample time equal to 55.5 cycles	
*                       - ADC_SampleTime_71Cycles5: Sample time equal to 71.5 cycles	
*                       - ADC_SampleTime_239Cycles5: Sample time equal to 239.5 cycles	
* Output         : None
* Return         : None
*******************************************************************************/
void ADC_RegularChannelConfig(ADC_TypeDef* ADCx, u8 ADC_Channel, u8 Rank, u8 ADC_SampleTime)
{
  u32 tmpreg1 = 0, tmpreg2 = 0;

  /* Check the parameters */
  assert_param(IS_ADC_ALL_PERIPH(ADCx));
  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_10 ... ADC_Channel_17 is selected */
  if (ADC_Channel > ADC_Channel_9)
  {
    /* Get the old register value */
    tmpreg1 = ADCx->SMPR1;
    /* Calculate the mask to clear */
    tmpreg2 = SMPR1_SMP_Set << (3 * (ADC_Channel - 10));
    /* Clear the old discontinuous mode channel count */
    tmpreg1 &= ~tmpreg2;
    /* Calculate the mask to set */
    tmpreg2 = (u32)ADC_SampleTime << (3 * (ADC_Channel - 10));
    /* Set the discontinuous mode channel count */
    tmpreg1 |= tmpreg2;
    /* Store the new register value */
    ADCx->SMPR1 = tmpreg1;
  }
  else /* ADC_Channel include in ADC_Channel_[0..9] */
  {
    /* Get the old register value */
    tmpreg1 = ADCx->SMPR2;
    /* Calculate the mask to clear */
    tmpreg2 = SMPR2_SMP_Set << (3 * ADC_Channel);
    /* Clear the old discontinuous mode channel count */
    tmpreg1 &= ~tmpreg2;
    /* Calculate the mask to set */
    tmpreg2 = (u32)ADC_SampleTime << (3 * ADC_Channel);
    /* Set the discontinuous mode channel count */
    tmpreg1 |= tmpreg2;
    /* Store the new register value */
    ADCx->SMPR2 = tmpreg1;
  }
  /* For Rank 1 to 6 */
  if (Rank < 7)
  {
    /* Get the old register value */
    tmpreg1 = ADCx->SQR3;
    /* Calculate the mask to clear */
    tmpreg2 = SQR3_SQ_Set << (5 * (Rank - 1));
    /* Clear the old SQx bits for the selected rank */
    tmpreg1 &= ~tmpreg2;
    /* Calculate the mask to set */
    tmpreg2 = (u32)ADC_Channel << (5 * (Rank - 1));
    /* Set the SQx bits for the selected rank */
    tmpreg1 |= tmpreg2;
    /* Store the new register value */
    ADCx->SQR3 = tmpreg1;
  }
  /* For Rank 7 to 12 */
  else if (Rank < 13)
  {
    /* Get the old register value */
    tmpreg1 = ADCx->SQR2;
    /* Calculate the mask to clear */
    tmpreg2 = SQR2_SQ_Set << (5 * (Rank - 7));
    /* Clear the old SQx bits for the selected rank */
    tmpreg1 &= ~tmpreg2;
    /* Calculate the mask to set */
    tmpreg2 = (u32)ADC_Channel << (5 * (Rank - 7));
    /* Set the SQx bits for the selected rank */
    tmpreg1 |= tmpreg2;
    /* Store the new register value */
    ADCx->SQR2 = tmpreg1;
  }
  /* For Rank 13 to 16 */
  else
  {
    /* Get the old register value */
    tmpreg1 = ADCx->SQR1;
    /* Calculate the mask to clear */
    tmpreg2 = SQR1_SQ_Set << (5 * (Rank - 13));
    /* Clear the old SQx bits for the selected rank */
    tmpreg1 &= ~tmpreg2;
    /* Calculate the mask to set */
    tmpreg2 = (u32)ADC_Channel << (5 * (Rank - 13));
    /* Set the SQx bits for the selected rank */
    tmpreg1 |= tmpreg2;
    /* Store the new register value */
    ADCx->SQR1 = tmpreg1;
  }
}

/*******************************************************************************
* Function Name  : ADC_ExternalTrigConvCmd
* Description    : Enables or disables the ADCx conversion through external trigger.
* Input          : - ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
*                  - NewState: new state of the selected ADC external trigger
*                    start of conversion.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/