Files

stm8s_adc2.c
/** ****************************************************************************** * @file stm8s_adc2.c * @author MCD Application Team * @version V2.2.0 * @date 30-September-2014 * @brief This file contains all the functions/macros for the ADC2 peripheral. ****************************************************************************** * @attention * * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2> * * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); * You may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.st.com/software_license_agreement_liberty_v2 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "stm8s_adc2.h" /** @addtogroup STM8S_StdPeriph_Driver * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ /* Private functions ---------------------------------------------------------*/ /* Public functions ----------------------------------------------------------*/ /** * @addtogroup ADC2_Public_Functions * @{ */ /** * @brief Deinitializes the ADC2 peripheral registers to their default reset * values. * @param None * @retval None */ void ADC2_DeInit(void) { ADC2->CSR = ADC2_CSR_RESET_VALUE; ADC2->CR1 = ADC2_CR1_RESET_VALUE; ADC2->CR2 = ADC2_CR2_RESET_VALUE; ADC2->TDRH = ADC2_TDRH_RESET_VALUE; ADC2->TDRL = ADC2_TDRL_RESET_VALUE; } /** * @brief Initializes the ADC2 peripheral according to the specified parameters * @param ADC2_ConversionMode: specifies the conversion mode * can be one of the values of @ref ADC2_ConvMode_TypeDef. * @param ADC2_Channel: specifies the channel to convert * can be one of the values of @ref ADC2_Channel_TypeDef. * @param ADC2_PrescalerSelection: specifies the ADC2 prescaler * can be one of the values of @ref ADC2_PresSel_TypeDef. * @param ADC2_ExtTrigger: specifies the external trigger * can be one of the values of @ref ADC2_ExtTrig_TypeDef. * @param ADC2_ExtTriggerState: specifies the external trigger new state * can be one of the values of @ref FunctionalState. * @param ADC2_Align: specifies the converted data alignment * can be one of the values of @ref ADC2_Align_TypeDef. * @param ADC2_SchmittTriggerChannel: specifies the schmitt trigger channel * can be one of the values of @ref ADC2_SchmittTrigg_TypeDef. * @param ADC2_SchmittTriggerState: specifies the schmitt trigger state * can be one of the values of @ref FunctionalState. * @retval None */ void ADC2_Init(ADC2_ConvMode_TypeDef ADC2_ConversionMode, ADC2_Channel_TypeDef ADC2_Channel, ADC2_PresSel_TypeDef ADC2_PrescalerSelection, ADC2_ExtTrig_TypeDef ADC2_ExtTrigger, FunctionalState ADC2_ExtTriggerState, ADC2_Align_TypeDef ADC2_Align, ADC2_SchmittTrigg_TypeDef ADC2_SchmittTriggerChannel, FunctionalState ADC2_SchmittTriggerState) { /* Check the parameters */ assert_param(IS_ADC2_CONVERSIONMODE_OK(ADC2_ConversionMode)); assert_param(IS_ADC2_CHANNEL_OK(ADC2_Channel)); assert_param(IS_ADC2_PRESSEL_OK(ADC2_PrescalerSelection)); assert_param(IS_ADC2_EXTTRIG_OK(ADC2_ExtTrigger)); assert_param(IS_FUNCTIONALSTATE_OK(((ADC2_ExtTriggerState)))); assert_param(IS_ADC2_ALIGN_OK(ADC2_Align)); assert_param(IS_ADC2_SCHMITTTRIG_OK(ADC2_SchmittTriggerChannel)); assert_param(IS_FUNCTIONALSTATE_OK(ADC2_SchmittTriggerState)); /*-----------------CR1 & CSR configuration --------------------*/ /* Configure the conversion mode and the channel to convert respectively according to ADC2_ConversionMode & ADC2_Channel values & ADC2_Align values */ ADC2_ConversionConfig(ADC2_ConversionMode, ADC2_Channel, ADC2_Align); /* Select the prescaler division factor according to ADC2_PrescalerSelection values */ ADC2_PrescalerConfig(ADC2_PrescalerSelection); /*-----------------CR2 configuration --------------------*/ /* Configure the external trigger state and event respectively according to ADC2_ExtTrigStatus, ADC2_ExtTrigger */ ADC2_ExternalTriggerConfig(ADC2_ExtTrigger, ADC2_ExtTriggerState); /*------------------TDR configuration ---------------------------*/ /* Configure the schmitt trigger channel and state respectively according to ADC2_SchmittTriggerChannel & ADC2_SchmittTriggerNewState values */ ADC2_SchmittTriggerConfig(ADC2_SchmittTriggerChannel, ADC2_SchmittTriggerState); /* Enable the ADC2 peripheral */ ADC2->CR1 |= ADC2_CR1_ADON; } /** * @brief Enables or Disables the ADC2 peripheral. * @param NewState: specifies the peripheral enabled or disabled state. * @retval None */ void ADC2_Cmd(FunctionalState NewState) { /* Check the parameters */ assert_param(IS_FUNCTIONALSTATE_OK(NewState)); if (NewState != DISABLE) { ADC2->CR1 |= ADC2_CR1_ADON; } else /* NewState == DISABLE */ { ADC2->CR1 &= (uint8_t)(~ADC2_CR1_ADON); } } /** * @brief Enables or disables the ADC2 interrupt. * @param NewState specifies the state of ADC2 interrupt. * @retval None */ void ADC2_ITConfig(FunctionalState NewState) { /* Check the parameters */ assert_param(IS_FUNCTIONALSTATE_OK(NewState)); if (NewState != DISABLE) { /* Enable the ADC2 interrupts */ ADC2->CSR |= (uint8_t)ADC2_CSR_EOCIE; } else /*NewState == DISABLE */ { /* Disable the ADC2 interrupts */ ADC2->CSR &= (uint8_t)(~ADC2_CSR_EOCIE); } } /** * @brief Configure the ADC2 prescaler division factor. * @param ADC2_Prescaler: the selected prescaler. * It can be one of the values of @ref ADC2_PresSel_TypeDef. * @retval None */ void ADC2_PrescalerConfig(ADC2_PresSel_TypeDef ADC2_Prescaler) { /* Check the parameter */ assert_param(IS_ADC2_PRESSEL_OK(ADC2_Prescaler)); /* Clear the SPSEL bits */ ADC2->CR1 &= (uint8_t)(~ADC2_CR1_SPSEL); /* Select the prescaler division factor according to ADC2_PrescalerSelection values */ ADC2->CR1 |= (uint8_t)(ADC2_Prescaler); } /** * @brief Enables or disables the ADC2 Schmitt Trigger on a selected channel. * @param ADC2_SchmittTriggerChannel specifies the desired Channel. * It can be set of the values of @ref ADC2_SchmittTrigg_TypeDef. * @param NewState specifies the Channel ADC2 Schmitt Trigger new status. * can have one of the values of @ref FunctionalState. * @retval None */ void ADC2_SchmittTriggerConfig(ADC2_SchmittTrigg_TypeDef ADC2_SchmittTriggerChannel, FunctionalState NewState) { /* Check the parameters */ assert_param(IS_ADC2_SCHMITTTRIG_OK(ADC2_SchmittTriggerChannel)); assert_param(IS_FUNCTIONALSTATE_OK(NewState)); if (ADC2_SchmittTriggerChannel == ADC2_SCHMITTTRIG_ALL) { if (NewState != DISABLE) { ADC2->TDRL &= (uint8_t)0x0; ADC2->TDRH &= (uint8_t)0x0; } else /* NewState == DISABLE */ { ADC2->TDRL |= (uint8_t)0xFF; ADC2->TDRH |= (uint8_t)0xFF; } } else if (ADC2_SchmittTriggerChannel < ADC2_SCHMITTTRIG_CHANNEL8) { if (NewState != DISABLE) { ADC2->TDRL &= (uint8_t)(~(uint8_t)((uint8_t)0x01 << (uint8_t)ADC2_SchmittTriggerChannel)); } else /* NewState == DISABLE */ { ADC2->TDRL |= (uint8_t)((uint8_t)0x01 << (uint8_t)ADC2_SchmittTriggerChannel); } } else /* ADC2_SchmittTriggerChannel >= ADC2_SCHMITTTRIG_CHANNEL8 */ { if (NewState != DISABLE) { ADC2->TDRH &= (uint8_t)(~(uint8_t)((uint8_t)0x01 << ((uint8_t)ADC2_SchmittTriggerChannel - (uint8_t)8))); } else /* NewState == DISABLE */ { ADC2->TDRH |= (uint8_t)((uint8_t)0x01 << ((uint8_t)ADC2_SchmittTriggerChannel - (uint8_t)8)); } } } /** * @brief Configure the ADC2 conversion on selected channel. * @param ADC2_ConversionMode Specifies the conversion type. * It can be set of the values of @ref ADC2_ConvMode_TypeDef * @param ADC2_Channel specifies the ADC2 Channel. * It can be set of the values of @ref ADC2_Channel_TypeDef * @param ADC2_Align specifies the converted data alignment. * It can be set of the values of @ref ADC2_Align_TypeDef * @retval None */ void ADC2_ConversionConfig(ADC2_ConvMode_TypeDef ADC2_ConversionMode, ADC2_Channel_TypeDef ADC2_Channel, ADC2_Align_TypeDef ADC2_Align) { /* Check the parameters */ assert_param(IS_ADC2_CONVERSIONMODE_OK(ADC2_ConversionMode)); assert_param(IS_ADC2_CHANNEL_OK(ADC2_Channel)); assert_param(IS_ADC2_ALIGN_OK(ADC2_Align)); /* Clear the align bit */ ADC2->CR2 &= (uint8_t)(~ADC2_CR2_ALIGN); /* Configure the data alignment */ ADC2->CR2 |= (uint8_t)(ADC2_Align); if (ADC2_ConversionMode == ADC2_CONVERSIONMODE_CONTINUOUS) { /* Set the continuous conversion mode */ ADC2->CR1 |= ADC2_CR1_CONT; } else /* ADC2_ConversionMode == ADC2_CONVERSIONMODE_SINGLE */ { /* Set the single conversion mode */ ADC2->CR1 &= (uint8_t)(~ADC2_CR1_CONT); } /* Clear the ADC2 channels */ ADC2->CSR &= (uint8_t)(~ADC2_CSR_CH); /* Select the ADC2 channel */ ADC2->CSR |= (uint8_t)(ADC2_Channel); } /** * @brief Configure the ADC2 conversion on external trigger event. * @par Full description: * The selected external trigger event can be enabled or disabled. * @param ADC2_ExtTrigger to select the External trigger event. * can have one of the values of @ref ADC2_ExtTrig_TypeDef. * @param NewState to enable/disable the selected external trigger * can have one of the values of @ref FunctionalState. * @retval None */ void ADC2_ExternalTriggerConfig(ADC2_ExtTrig_TypeDef ADC2_ExtTrigger, FunctionalState NewState) { /* Check the parameters */ assert_param(IS_ADC2_EXTTRIG_OK(ADC2_ExtTrigger)); assert_param(IS_FUNCTIONALSTATE_OK(NewState)); /* Clear the external trigger selection bits */ ADC2->CR2 &= (uint8_t)(~ADC2_CR2_EXTSEL); if (NewState != DISABLE) { /* Enable the selected external Trigger */ ADC2->CR2 |= (uint8_t)(ADC2_CR2_EXTTRIG); } else /* NewState == DISABLE */ { /* Disable the selected external trigger */ ADC2->CR2 &= (uint8_t)(~ADC2_CR2_EXTTRIG); } /* Set the selected external trigger */ ADC2->CR2 |= (uint8_t)(ADC2_ExtTrigger); } /** * @brief Start ADC2 conversion * @par Full description: * This function triggers the start of conversion, after ADC2 configuration. * @param None * @retval None * @par Required preconditions: * Enable the ADC2 peripheral before calling this function */ void ADC2_StartConversion(void) { ADC2->CR1 |= ADC2_CR1_ADON; } /** * @brief Get one sample of measured signal. * @param None * @retval ConversionValue: value of the measured signal. * @par Required preconditions: * ADC2 conversion finished. */ uint16_t ADC2_GetConversionValue(void) { uint16_t temph = 0; uint8_t templ = 0; if ((ADC2->CR2 & ADC2_CR2_ALIGN) != 0) /* Right alignment */ { /* Read LSB first */ templ = ADC2->DRL; /* Then read MSB */ temph = ADC2->DRH; temph = (uint16_t)(templ | (uint16_t)(temph << (uint8_t)8)); } else /* Left alignment */ { /* Read MSB first*/ temph = ADC2->DRH; /* Then read LSB */ templ = ADC2->DRL; temph = (uint16_t)((uint16_t)((uint16_t)templ << 6) | (uint16_t)((uint16_t)temph << 8)); } return ((uint16_t)temph); } /** * @brief Checks the ADC2 EOC flag status. * @param None * @retval FlagStatus Status of the ADC2 EOC flag. */ FlagStatus ADC2_GetFlagStatus(void) { /* Get EOC flag status */ return (FlagStatus)(ADC2->CSR & ADC2_CSR_EOC); } /** * @brief Clear the ADC2 EOC Flag. * @param None * @retval None */ void ADC2_ClearFlag(void) { ADC2->CSR &= (uint8_t)(~ADC2_CSR_EOC); } /** * @brief Returns the EOC pending bit status * @par Parameters: * None * @retval FlagStatus: status of the EOC pending bit. */ ITStatus ADC2_GetITStatus(void) { return (ITStatus)(ADC2->CSR & ADC2_CSR_EOC); } /** * @brief Clear the ADC2 End of Conversion pending bit. * @param None * @retval None */ void ADC2_ClearITPendingBit(void) { ADC2->CSR &= (uint8_t)(~ADC2_CSR_EOC); } /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
Report a bug