stm8l15x_adc.c

STM8L的tim4定时器使用

  /* set the External Trigger Edge Sensitivity  and the external event 
     selection */
  ADCx->CR2 |= (uint8_t)( (uint8_t)ADC_ExtTRGSensitivity | \
                          (uint8_t)ADC_ExtEventSelection);
}

 /**
  * @}
  */

/** @defgroup ADC_Group2 Analog Watchdog configuration functions
 *  @brief   Analog Watchdog configuration functions 
 *
@verbatim   
 ===============================================================================
                    Analog Watchdog configuration functions
 ===============================================================================  

  This section provides functions allowing to configure the Analog Watchdog
  (AWD) feature in the ADC.
  
  A typical configuration Analog Watchdog is done following these steps :
   1. the ADC guarded channel is selected using the 
      ADC_AnalogWatchdogChannelSelect() function.
   2. The Analog watchdog lower and higher threshold are configured using the  
      ADC_AnalogWatchdogThresholdsConfig() function.
   
   Note : Both AWD selection and thresholds can be configured with one unique 
          function ADC_AnalogWatchdogConfig(), which is kept for firmware 
          compatibility reason.

@endverbatim
  * @{
  */
/**
  * @brief  Configures the channel to be checked by the Analog watchdog.
  * @param  ADCx where x can be 1 to select the specified ADC peripheral.
  * @param  ADC_AnalogWatchdogSelection : Specifies the channel to be checked 
  *         by the Analog watchdog.
  *          This parameter can be one of the following values:
  *            @arg ADC_AnalogWatchdogSelection_Channel0: AWD affected to Channel 0
  *            @arg ADC_AnalogWatchdogSelection_Channel1: AWD affected to Channel 1
  *            @arg ADC_AnalogWatchdogSelection_Channel2: AWD affected to Channel 2
  *            @arg ADC_AnalogWatchdogSelection_Channel3: AWD affected to Channel 3
  *            @arg ADC_AnalogWatchdogSelection_Channel4: AWD affected to Channel 4
  *            @arg ADC_AnalogWatchdogSelection_Channel5: AWD affected to Channel 5
  *            @arg ADC_AnalogWatchdogSelection_Channel6: AWD affected to Channel 6
  *            @arg ADC_AnalogWatchdogSelection_Channel7: AWD affected to Channel 7
  *            @arg ADC_AnalogWatchdogSelection_Channel8: AWD affected to Channel 8
  *            @arg ADC_AnalogWatchdogSelection_Channel9: AWD affected to Channel 9
  *            @arg ADC_AnalogWatchdogSelection_Channel10: AWD affected to Channel 10
  *            @arg ADC_AnalogWatchdogSelection_Channel11: AWD affected to Channel 11
  *            @arg ADC_AnalogWatchdogSelection_Channel12: AWD affected to Channel 12
  *            @arg ADC_AnalogWatchdogSelection_Channel13: AWD affected to Channel 13
  *            @arg ADC_AnalogWatchdogSelection_Channel14: AWD affected to Channel 14
  *            @arg ADC_AnalogWatchdogSelection_Channel15: AWD affected to Channel 15
  *            @arg ADC_AnalogWatchdogSelection_Channel16: AWD affected to Channel 16
  *            @arg ADC_AnalogWatchdogSelection_Channel17: AWD affected to Channel 17
  *            @arg ADC_AnalogWatchdogSelection_Channel18: AWD affected to Channel 18
  *            @arg ADC_AnalogWatchdogSelection_Channel19: AWD affected to Channel 19
  *            @arg ADC_AnalogWatchdogSelection_Channel20: AWD affected to Channel 20
  *            @arg ADC_AnalogWatchdogSelection_Channel21: AWD affected to Channel 21
  *            @arg ADC_AnalogWatchdogSelection_Channel22: AWD affected to Channel 22
  *            @arg ADC_AnalogWatchdogSelection_Channel23: AWD affected to Channel 23
  *         @ref ADC_AnalogWatchdogSelection_TypeDef enumeration.
  * @retval None
  */
void ADC_AnalogWatchdogChannelSelect(ADC_TypeDef* ADCx,
                                     ADC_AnalogWatchdogSelection_TypeDef ADC_AnalogWatchdogSelection)
{
  /* Check the parameters */
  assert_param(IS_ADC_ANALOGWATCHDOG_SELECTION(ADC_AnalogWatchdogSelection));

  /* Reset the CHSEL bits */
  ADCx->CR3 &= ((uint8_t)~ADC_CR3_CHSEL);

  /* Select the channel to be checked by the Analog watchdog */
  ADCx->CR3 |= (uint8_t)ADC_AnalogWatchdogSelection;
}

/**
  * @brief  Configures the high and low thresholds of the Analog watchdog.
  * @param  ADCx where x can be 1 to select the specified ADC peripheral.
  * @param  HighThreshold: Analog watchdog High threshold value.
    *       This parameter must be a 12bit value.
  * @param  LowThreshold: Analog watchdog Low threshold value.
    *       This parameter must be a 12bit value.
  * @retval None
  */
void ADC_AnalogWatchdogThresholdsConfig(ADC_TypeDef* ADCx, uint16_t HighThreshold, uint16_t LowThreshold)
{
  /* Check the parameters */
  assert_param(IS_ADC_THRESHOLD(HighThreshold));
  assert_param(IS_ADC_THRESHOLD(LowThreshold));

  /* Set the ADC high threshold */
  ADCx->HTRH = (uint8_t)(HighThreshold >> 8);
  ADCx->HTRL = (uint8_t)(HighThreshold);

  /* Set the ADC low threshold */
  ADCx->LTRH = (uint8_t)(LowThreshold >> 8);
  ADCx->LTRL = (uint8_t)(LowThreshold);
}

/**
  * @brief  Configures the Analog watchdog.
  * @param  ADCx where x can be 1 to select the specified ADC peripheral.
  * @param  ADC_AnalogWatchdogSelection : Specifies the channel to be checked 
  *         by the Analog watchdog.
  *          This parameter can be one of the following values:
  *            @arg ADC_AnalogWatchdogSelection_Channel0: AWD affected to Channel 0
  *            @arg ADC_AnalogWatchdogSelection_Channel1: AWD affected to Channel 1
  *            @arg ADC_AnalogWatchdogSelection_Channel2: AWD affected to Channel 2
  *            @arg ADC_AnalogWatchdogSelection_Channel3: AWD affected to Channel 3
  *            @arg ADC_AnalogWatchdogSelection_Channel4: AWD affected to Channel 4
  *            @arg ADC_AnalogWatchdogSelection_Channel5: AWD affected to Channel 5
  *            @arg ADC_AnalogWatchdogSelection_Channel6: AWD affected to Channel 6
  *            @arg ADC_AnalogWatchdogSelection_Channel7: AWD affected to Channel 7
  *            @arg ADC_AnalogWatchdogSelection_Channel8: AWD affected to Channel 8
  *            @arg ADC_AnalogWatchdogSelection_Channel9: AWD affected to Channel 9
  *            @arg ADC_AnalogWatchdogSelection_Channel10: AWD affected to Channel 10
  *            @arg ADC_AnalogWatchdogSelection_Channel11: AWD affected to Channel 11
  *            @arg ADC_AnalogWatchdogSelection_Channel12: AWD affected to Channel 12
  *            @arg ADC_AnalogWatchdogSelection_Channel13: AWD affected to Channel 13
  *            @arg ADC_AnalogWatchdogSelection_Channel14: AWD affected to Channel 14
  *            @arg ADC_AnalogWatchdogSelection_Channel15: AWD affected to Channel 15
  *            @arg ADC_AnalogWatchdogSelection_Channel16: AWD affected to Channel 16
  *            @arg ADC_AnalogWatchdogSelection_Channel17: AWD affected to Channel 17
  *            @arg ADC_AnalogWatchdogSelection_Channel18: AWD affected to Channel 18
  *            @arg ADC_AnalogWatchdogSelection_Channel19: AWD affected to Channel 19
  *            @arg ADC_AnalogWatchdogSelection_Channel20: AWD affected to Channel 20
  *            @arg ADC_AnalogWatchdogSelection_Channel21: AWD affected to Channel 21
  *            @arg ADC_AnalogWatchdogSelection_Channel22: AWD affected to Channel 22
  *            @arg ADC_AnalogWatchdogSelection_Channel23: AWD affected to Channel 23  
  * @param  HighThreshold: Analog watchdog High threshold value.
    *       This parameter must be a 12bit value.
  * @param  LowThreshold: Analog watchdog Low threshold value.
    *       This parameter must be a 12bit value.
  * @retval None
  */
void ADC_AnalogWatchdogConfig(ADC_TypeDef* ADCx,
                              ADC_AnalogWatchdogSelection_TypeDef ADC_AnalogWatchdogSelection,
                              uint16_t HighThreshold,
                              uint16_t LowThreshold)
{
  /* Check the parameters */
  assert_param(IS_ADC_ANALOGWATCHDOG_SELECTION(ADC_AnalogWatchdogSelection));
  assert_param(IS_ADC_THRESHOLD(HighThreshold));
  assert_param(IS_ADC_THRESHOLD(LowThreshold));

  /*Reset the CHSEL bits */
  ADCx->CR3 &= ((uint8_t)~ADC_CR3_CHSEL);

  /* Select the channel to be checked by the Analog watchdog.*/
  ADCx->CR3 |= (uint8_t)ADC_AnalogWatchdogSelection;

  /* Set the ADC high threshold */
  ADCx->HTRH = (uint8_t)(HighThreshold >> 8);
  ADCx->HTRL = (uint8_t)(HighThreshold);

  /* Set the ADC low threshold */
  ADCx->LTRH = (uint8_t)(LowThreshold >> 8);
  ADCx->LTRL = (uint8_t)LowThreshold;
}

 /**
  * @}
  */

/** @defgroup ADC_Group3 Temperature Sensor & Vrefint (Voltage Reference 
 *            internal) management functions
 *  @brief   Temperature Sensor & Vrefint (Voltage Reference internal) 
 *            management functions 
 *
@verbatim   
 ===============================================================================
  Temperature Sensor & Vrefint (Voltage Reference internal) management functions
 ===============================================================================  

  This section provides functions allowing to enable/ disable the internal 
  connections between the ADC and the Temperature Sensor and the Vrefint source.
     
  A typical configuration to get the Temperature sensor or/and Vrefint channels 
  voltages is done following these steps :
   1. Enable the internal connection of Temperature sensor or/and Vrefint sources 
      with the ADC channels: 
      - for the Temperature sensor using ADC_TempSensorCmd() function.
      - for the Internal Voltage reference using ADC_VrefintCmd() function. 
   2. Enable the ADC_Channel_TempSensor and/or ADC_Channel_Vrefint channels 
      using ADC_ChannelCmd()function. 
   3. Get the voltage values, using ADC_GetConversionValue().
 
@endverbatim
  * @{
  */
  
/**
  * @brief  Enables or disables the Temperature sensor internal reference.
  * @param  NewState : new state of the Temperature sensor internal reference.
    *         This parameter can be: ENABLE or DISABLE.
  * @retval None
  */
void ADC_TempSensorCmd(FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /*Enable the Temperature sensor internal reference.*/
    ADC1->TRIGR[0] |= (uint8_t)(ADC_TRIGR1_TSON);
  }
  else
  {
    /*Disable the Temperature sensor internal reference.*/
    ADC1->TRIGR[0] &= (uint8_t)(~ADC_TRIGR1_TSON);
  }
}

/**
  * @brief  Enables or disables the Internal Voltage reference.
  * @param  NewState : new state of the Internal Voltage reference.
    *         This parameter can be: ENABLE or DISABLE.
  * @retval None
  */
void ADC_VrefintCmd(FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the Internal Voltage reference.*/
    ADC1->TRIGR[0] |= (uint8_t)(ADC_TRIGR1_VREFINTON);
  }
  else
  {
    /* Disable the Internal Voltage reference.*/
    ADC1->TRIGR[0] &= (uint8_t)(~ADC_TRIGR1_VREFINTON);
  }
}

 /**
  * @}
  */
/** @defgroup ADC_Group4 Channels Configuration functions
 *  @brief   Channels Configuration functions
 *
@verbatim    
 ===============================================================================
                      Channels Configuration functions
 ===============================================================================  
  This section provides functions allowing to:
   - Enable or disable the ADC channel using ADC_ChannelCmd() function,
   - Configure the channels sampling times using ADC_SamplingTimeConfig() 
     function.
     Note: there are 2 sampling times configuration values : 
            - 1st Group value : for channels 0..23  
            - 2nd Group value : for channels 24..27 (depending on the MCU 
              package density) and Temperature Sensor and Vrefint channels. 
   - Configure the channels Schmitt Trigger for each channel using 
     ADC_SchmittTriggerConfig() function.
   - Get the current ADC conversion value.