stm8s_adc1.c

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/**
  ******************************************************************************
  * @file stm8s_adc1.c
  * @brief This file contains all the functions/macros for the ADC1 peripheral.
  * @author STMicroelectronics - MCD Application Team
  * @version V1.1.0
  * @date 02/27/2009
  ******************************************************************************
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2009 STMicroelectronics</center></h2>
  * @image html logo.bmp
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "stm8s_adc1.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/* Public functions ----------------------------------------------------------*/

/**
  * @addtogroup ADC1_Public_Functions
  * @{
  */

/**
  * @brief Deinitializes the ADC1 peripheral registers to their default reset
  * values.
  * @par Parameters:
  * None
  * @retval None
  * @par Required preconditions:
  * None
  */
void ADC1_DeInit(void)
{
  ADC1->CSR  = ADC1_CSR_RESET_VALUE;
  ADC1->CR1  = ADC1_CR1_RESET_VALUE;
  ADC1->CR2  = ADC1_CR2_RESET_VALUE;
  ADC1->CR3  = ADC1_CR3_RESET_VALUE;
  ADC1->TDRH = ADC1_TDRH_RESET_VALUE;
  ADC1->TDRL = ADC1_TDRL_RESET_VALUE;
  ADC1->HTRH = ADC1_HTRH_RESET_VALUE;
  ADC1->HTRL = ADC1_HTRL_RESET_VALUE;
  ADC1->LTRH = ADC1_LTRH_RESET_VALUE;
  ADC1->LTRL = ADC1_LTRL_RESET_VALUE;
  ADC1->AWCRH = ADC1_AWCRH_RESET_VALUE;
  ADC1->AWCRL = ADC1_AWCRL_RESET_VALUE;
}


/**
  * @brief Initializes the ADC1 peripheral according to the specified parameters
  * @param[in] ADC1_ConversionMode: specifies the conversion mode
  * can be one of the values of @ref ADC1_ConvMode_TypeDef.
  * @param[in] ADC1_Channel: specifies the channel to convert
  * can be one of the values of @ref ADC1_Channel_TypeDef.
  * @param[in] ADC1_PrescalerSelection: specifies the ADC1 prescaler
  * can be one of the values of @ref ADC1_PresSel_TypeDef.
  * @param[in] ADC1_ExtTrigger: specifies the external trigger
  * can be one of the values of @ref ADC1_ExtTrig_TypeDef.
  * @param[in] ADC1_ExtTriggerState: specifies the external trigger new state
  * can be one of the values of @ref FunctionalState.
  * @param[in] ADC1_Align: specifies the converted data alignement
  * can be one of the values of @ref ADC1_Align_TypeDef.
  * @param[in] ADC1_SchmittTriggerChannel: specifies the schmitt trigger channel
  * can be one of the values of @ref ADC1_SchmittTrigg_TypeDef.
  * @param[in] ADC1_SchmittTriggerState: specifies the schmitt trigger state
  * can be one of the values of @ref FunctionalState.
  * @retval None
  * @par Required preconditions:
  * None
  */
void ADC1_Init(ADC1_ConvMode_TypeDef ADC1_ConversionMode, ADC1_Channel_TypeDef ADC1_Channel, ADC1_PresSel_TypeDef ADC1_PrescalerSelection, ADC1_ExtTrig_TypeDef ADC1_ExtTrigger, FunctionalState ADC1_ExtTriggerState, ADC1_Align_TypeDef ADC1_Align, ADC1_SchmittTrigg_TypeDef ADC1_SchmittTriggerChannel, FunctionalState ADC1_SchmittTriggerState)
{

  /* Check the parameters */
  assert_param(IS_ADC1_CONVERSIONMODE_OK(ADC1_ConversionMode));
  assert_param(IS_ADC1_CHANNEL_OK(ADC1_Channel));
  assert_param(IS_ADC1_PRESSEL_OK(ADC1_PrescalerSelection));
  assert_param(IS_ADC1_EXTTRIG_OK(ADC1_ExtTrigger));
  assert_param(IS_FUNCTIONALSTATE_OK(((ADC1_ExtTriggerState))));
  assert_param(IS_ADC1_ALIGN_OK(ADC1_Align));
  assert_param(IS_ADC1_SCHMITTTRIG_OK(ADC1_SchmittTriggerChannel));
  assert_param(IS_FUNCTIONALSTATE_OK(ADC1_SchmittTriggerState));

  /*-----------------CR1 & CSR configuration --------------------*/
  /* Configure the conversion mode and the channel to convert
  respectively according to ADC1_ConversionMode & ADC1_Channel values  &  ADC1_Align values */
  ADC1_ConversionConfig(ADC1_ConversionMode, ADC1_Channel, ADC1_Align);
  /* Select the prescaler division factor according to ADC1_PrescalerSelection values */
  ADC1_PrescalerConfig(ADC1_PrescalerSelection);

  /*-----------------CR2 configuration --------------------*/
  /* Configure the external trigger state and event respectively
  according to NewState, ADC1_ExtTrigger */
  ADC1_ExternalTriggerConfig(ADC1_ExtTrigger, ADC1_ExtTriggerState);

  /*------------------TDR configuration ---------------------------*/
  /* Configure the schmitt trigger channel and state respectively
  according to ADC1_SchmittTriggerChannel & ADC1_SchmittTriggerNewState  values */
  ADC1_SchmittTriggerConfig(ADC1_SchmittTriggerChannel, ADC1_SchmittTriggerState);

  /* Enable the ADC1 peripheral */
  ADC1->CR1 |= ADC1_CR1_ADON;

}


/**
  * @brief Enables or Disables the ADC1 peripheral.
  * @param[in] NewState: specifies the peripheral enabled or disabled state.
  * @retval None
  * @par Required preconditions:
  * None
  */
void ADC1_Cmd(FunctionalState NewState)
{

  /* Check the parameters */
  assert_param(IS_FUNCTIONALSTATE_OK(NewState));

  if (NewState != DISABLE)
  {
    ADC1->CR1 |= ADC1_CR1_ADON;
  }
  else /* NewState == DISABLE */
  {
    ADC1->CR1 &= (u8)(~ADC1_CR1_ADON);
  }

}

/**
  * @brief Enables or Disables the ADC1 scan mode.
  * @param[in] NewState: specifies the selected mode enabled or disabled state.
  * @retval None
  * @par Required preconditions:
  * None
  */
void ADC1_ScanModeCmd(FunctionalState NewState)
{

  /* Check the parameters */
  assert_param(IS_FUNCTIONALSTATE_OK(NewState));

  if (NewState != DISABLE)
  {
    ADC1->CR2 |= ADC1_CR2_SCAN;
  }
  else /* NewState == DISABLE */
  {
    ADC1->CR2 &= (u8)(~ADC1_CR2_SCAN);
  }

}

/**
  * @brief Enables or Disables the ADC1 data store into the Data Buffer registers rather than in the Data Register
  * @param[in] NewState: specifies the selected mode enabled or disabled state.
  * @retval None
  * @par Required preconditions:
  * None
  */
void ADC1_DataBufferCmd(FunctionalState NewState)
{

  /* Check the parameters */
  assert_param(IS_FUNCTIONALSTATE_OK(NewState));

  if (NewState != DISABLE)
  {
    ADC1->CR3 |= ADC1_CR3_DBUF;
  }
  else /* NewState == DISABLE */
  {
    ADC1->CR3 &= (u8)(~ADC1_CR3_DBUF);
  }

}

/**
  * @brief Enables or disables the ADC1 interrupt.
  * @param[in] ADC1_IT specifies the name of the interrupt to enable or disable.
  * This parameter can be one of the following values:
  *    - ADC1_IT_AWDITEN : Analog WDG interrupt enable
  *    - ADC1_IT_EOCITEN  : EOC iterrupt enable
  * @param[in] NewState specifies the state of the interrupt to apply.
  * @retval None
  * @par Required preconditions:
  * None
  */
void ADC1_ITConfig(ADC1_IT_TypeDef ADC1_IT, FunctionalState NewState)
{

  /* Check the parameters */
  assert_param(IS_ADC1_IT_OK(ADC1_IT));
  assert_param(IS_FUNCTIONALSTATE_OK(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the ADC1 interrupts */
    ADC1->CSR |= (u8)ADC1_IT;
  }
  else  /* NewState == DISABLE */
  {
    /* Disable the ADC1 interrupts */
    ADC1->CSR &= (u8)(~ADC1_IT);
  }

}

/**
  * @brief Configure the ADC1 prescaler division factor.
  * @param[in] ADC1_Prescaler: the selected precaler.
  * It can be one of the values of @ref ADC1_PresSel_TypeDef.
  * @retval None
  * @par Required preconditions:
  *  None
  */
void ADC1_PrescalerConfig(ADC1_PresSel_TypeDef ADC1_Prescaler)
{

  /* Check the parameter */
  assert_param(IS_ADC1_PRESSEL_OK(ADC1_Prescaler));

  /* Clear the SPSEL bits */
  ADC1->CR1 &= (u8)(~ADC1_CR1_SPSEL);
  /* Select the prescaler division factor according to ADC1_PrescalerSelection values */
  ADC1->CR1 |= (u8)(ADC1_Prescaler);

}


/**
  * @brief Enables or disables the ADC1 Schmitt Trigger on a selected channel.
  * @param[in] ADC1_SchmittTriggerChannel specifies the desired Channel.
  * It can be set of the values of @ref ADC1_SchmittTrigg_TypeDef.
  * @param[in] NewState specifies Channel new status.
  * can have one of the values of @ref FunctionalState.
  * @retval None
  * @par Required preconditions:
  * None
  */
void ADC1_SchmittTriggerConfig(ADC1_SchmittTrigg_TypeDef ADC1_SchmittTriggerChannel, FunctionalState NewState)
{

  /* Check the parameters */
  assert_param(IS_ADC1_SCHMITTTRIG_OK(ADC1_SchmittTriggerChannel));
  assert_param(IS_FUNCTIONALSTATE_OK(NewState));

  if (ADC1_SchmittTriggerChannel == ADC1_SCHMITTTRIG_ALL)
  {
    if (NewState != DISABLE)
    {
      ADC1->TDRL &= (u8)0x0;
      ADC1->TDRH &= (u8)0x0;
    }
    else /* NewState == DISABLE */
    {
      ADC1->TDRL |= (u8)0xFF;
      ADC1->TDRH |= (u8)0xFF;
    }
  }
  else if (ADC1_SchmittTriggerChannel < ADC1_SCHMITTTRIG_CHANNEL8)
  {
    if (NewState != DISABLE)
    {
      ADC1->TDRL &= (u8)(~(u8)((u8)0x01 << (u8)ADC1_SchmittTriggerChannel));
    }
    else /* NewState == DISABLE */
    {
      ADC1->TDRL |= (u8)((u8)0x01 << (u8)ADC1_SchmittTriggerChannel);
    }
  }
  else /* ADC1_SchmittTriggerChannel >= ADC1_SCHMITTTRIG_CHANNEL8 */
  {
    if (NewState != DISABLE)
    {
      ADC1->TDRH &= (u8)(~(u8)((u8)0x01 << ((u8)ADC1_SchmittTriggerChannel - (u8)8)));
    }
    else /* NewState == DISABLE */
    {
      ADC1->TDRH |= (u8)((u8)0x01 << ((u8)ADC1_SchmittTriggerChannel - (u8)8));
    }
  }

}


/**
  * @brief Configure the ADC1 conversion on selected channel.
  * @param[in] ADC1_ConversionMode Specifies the conversion type.
  * It can be set of the values of @ref ADC1_ConvMode_TypeDef
  * @param[in] ADC1_Channel specifies the ADC1 Channel.
  * It can be set of the values of @ref ADC1_Channel_TypeDef
  * @param[in] ADC1_Align specifies the conerted data alignement.
  * It can be set of the values of @ref ADC1_Align_TypeDef
  * @retval None
  * @par Required preconditions:
  * None
  */
void ADC1_ConversionConfig(ADC1_ConvMode_TypeDef ADC1_ConversionMode, ADC1_Channel_TypeDef ADC1_Channel, ADC1_Align_TypeDef ADC1_Align)
{

  /* Check the parameters */
  assert_param(IS_ADC1_CONVERSIONMODE_OK(ADC1_ConversionMode));
  assert_param(IS_ADC1_CHANNEL_OK(ADC1_Channel));
  assert_param(IS_ADC1_ALIGN_OK(ADC1_Align));

  /* Clear the align bit */
  ADC1->CR2 &= (u8)(~ADC1_CR2_ALIGN);
  /* Configure the data alignment */
  ADC1->CR2 |= (u8)(ADC1_Align);

  if (ADC1_ConversionMode == ADC1_CONVERSIONMODE_CONTINUOUS)
  {
    /* Set the continuous coversion mode */
    ADC1->CR1 |= ADC1_CR1_CONT;
  }
  else /* ADC1_ConversionMode == ADC1_CONVERSIONMODE_SINGLE */
  {
    /* Set the single conversion mode */
    ADC1->CR1 &= (u8)(~ADC1_CR1_CONT);
  }

  /* Clear the ADC1 channels */
  ADC1->CSR &= (u8)(~ADC1_CSR_CH);
  /* Select the ADC1 channel */
  ADC1->CSR |= (u8)(ADC1_Channel);

}


/**
  * @brief Configure the ADC1 conversion on external trigger event.
  * @par Full description:
  * The selected external trigger evant can be enabled or disabled.
  * @param[in] ADC1_ExtTrigger to select the External trigger event.
  * can have one of the values of @ref ADC1_ExtTrig_TypeDef.
  * @param[in] NewState to enable/disable the selected external trigger
  * can have one of the values of @ref FunctionalState.
  * @retval None
  * @par Required preconditions:
  * None
  */
void ADC1_ExternalTriggerConfig(ADC1_ExtTrig_TypeDef ADC1_ExtTrigger, FunctionalState NewState)
{

  /* Check the parameters */
  assert_param(IS_ADC1_EXTTRIG_OK(ADC1_ExtTrigger));
  assert_param(IS_FUNCTIONALSTATE_OK(NewState));

  /* Clear the external trigger selection bits */
  ADC1->CR2 &= (u8)(~ADC1_CR2_EXTSEL);

  if (NewState != DISABLE)
  {
    /* Enable the selected external Trigger */
    ADC1->CR2 |= (u8)(ADC1_CR2_EXTTRIG);
  }
  else /* NewState == DISABLE */
  {
    /* Disable the selected external trigger */