/** | |
****************************************************************************** | |
* @file stm32f0xx_hal_adc_ex.c | |
* @author MCD Application Team | |
* @brief This file provides firmware functions to manage the following | |
* functionalities of the Analog to Digital Convertor (ADC) | |
* peripheral: | |
* + Operation functions | |
* ++ Calibration (ADC automatic self-calibration) | |
* Other functions (generic functions) are available in file | |
* "stm32f0xx_hal_adc.c". | |
* | |
@verbatim | |
[..] | |
(@) Sections "ADC peripheral features" and "How to use this driver" are | |
available in file of generic functions "stm32l1xx_hal_adc.c". | |
[..] | |
@endverbatim | |
****************************************************************************** | |
* @attention | |
* | |
* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> | |
* | |
* Redistribution and use in source and binary forms, with or without modification, | |
* are permitted provided that the following conditions are met: | |
* 1. Redistributions of source code must retain the above copyright notice, | |
* this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright notice, | |
* this list of conditions and the following disclaimer in the documentation | |
* and/or other materials provided with the distribution. | |
* 3. Neither the name of STMicroelectronics nor the names of its contributors | |
* may be used to endorse or promote products derived from this software | |
* without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
* | |
****************************************************************************** | |
*/ | |
/* Includes ------------------------------------------------------------------*/ | |
#include "stm32f0xx_hal.h" | |
/** @addtogroup STM32F0xx_HAL_Driver | |
* @{ | |
*/ | |
/** @defgroup ADCEx ADCEx | |
* @brief ADC HAL module driver | |
* @{ | |
*/ | |
#ifdef HAL_ADC_MODULE_ENABLED | |
/* Private typedef -----------------------------------------------------------*/ | |
/* Private define ------------------------------------------------------------*/ | |
/** @defgroup ADCEx_Private_Constants ADCEx Private Constants | |
* @{ | |
*/ | |
/* Fixed timeout values for ADC calibration, enable settling time, disable */ | |
/* settling time. */ | |
/* Values defined to be higher than worst cases: low clock frequency, */ | |
/* maximum prescaler. */ | |
/* Ex of profile low frequency : Clock source at 0.1 MHz, ADC clock */ | |
/* prescaler 4. */ | |
/* Unit: ms */ | |
#define ADC_DISABLE_TIMEOUT 2 | |
#define ADC_CALIBRATION_TIMEOUT 2U | |
/** | |
* @} | |
*/ | |
/* Private macros -------------------------------------------------------------*/ | |
/* Private variables ---------------------------------------------------------*/ | |
/* Private function prototypes -----------------------------------------------*/ | |
/* Private functions ---------------------------------------------------------*/ | |
/** @defgroup ADCEx_Exported_Functions ADCEx Exported Functions | |
* @{ | |
*/ | |
/** @defgroup ADCEx_Exported_Functions_Group1 Extended Initialization/de-initialization functions | |
* @brief Extended Initialization and Configuration functions | |
* | |
@verbatim | |
=============================================================================== | |
##### IO operation functions ##### | |
=============================================================================== | |
[..] This section provides functions allowing to: | |
(+) Perform the ADC calibration. | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Perform an ADC automatic self-calibration | |
* Calibration prerequisite: ADC must be disabled (execute this | |
* function before HAL_ADC_Start() or after HAL_ADC_Stop() ). | |
* @note Calibration factor can be read after calibration, using function | |
* HAL_ADC_GetValue() (value on 7 bits: from DR[6;0]). | |
* @param hadc ADC handle | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_ADCEx_Calibration_Start(ADC_HandleTypeDef* hadc) | |
{ | |
HAL_StatusTypeDef tmp_hal_status = HAL_OK; | |
uint32_t tickstart = 0U; | |
uint32_t backup_setting_adc_dma_transfer = 0; /* Note: Variable not declared as volatile because register read is already declared as volatile */ | |
/* Check the parameters */ | |
assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); | |
/* Process locked */ | |
__HAL_LOCK(hadc); | |
/* Calibration prerequisite: ADC must be disabled. */ | |
if (ADC_IS_ENABLE(hadc) == RESET) | |
{ | |
/* Set ADC state */ | |
ADC_STATE_CLR_SET(hadc->State, | |
HAL_ADC_STATE_REG_BUSY, | |
HAL_ADC_STATE_BUSY_INTERNAL); | |
/* Disable ADC DMA transfer request during calibration */ | |
/* Note: Specificity of this STM32 serie: Calibration factor is */ | |
/* available in data register and also transfered by DMA. */ | |
/* To not insert ADC calibration factor among ADC conversion data */ | |
/* in array variable, DMA transfer must be disabled during */ | |
/* calibration. */ | |
backup_setting_adc_dma_transfer = READ_BIT(hadc->Instance->CFGR1, ADC_CFGR1_DMAEN | ADC_CFGR1_DMACFG); | |
CLEAR_BIT(hadc->Instance->CFGR1, ADC_CFGR1_DMAEN | ADC_CFGR1_DMACFG); | |
/* Start ADC calibration */ | |
hadc->Instance->CR |= ADC_CR_ADCAL; | |
tickstart = HAL_GetTick(); | |
/* Wait for calibration completion */ | |
while(HAL_IS_BIT_SET(hadc->Instance->CR, ADC_CR_ADCAL)) | |
{ | |
if((HAL_GetTick() - tickstart) > ADC_CALIBRATION_TIMEOUT) | |
{ | |
/* Update ADC state machine to error */ | |
ADC_STATE_CLR_SET(hadc->State, | |
HAL_ADC_STATE_BUSY_INTERNAL, | |
HAL_ADC_STATE_ERROR_INTERNAL); | |
/* Process unlocked */ | |
__HAL_UNLOCK(hadc); | |
return HAL_ERROR; | |
} | |
} | |
/* Restore ADC DMA transfer request after calibration */ | |
SET_BIT(hadc->Instance->CFGR1, backup_setting_adc_dma_transfer); | |
/* Set ADC state */ | |
ADC_STATE_CLR_SET(hadc->State, | |
HAL_ADC_STATE_BUSY_INTERNAL, | |
HAL_ADC_STATE_READY); | |
} | |
else | |
{ | |
/* Update ADC state machine to error */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG); | |
tmp_hal_status = HAL_ERROR; | |
} | |
/* Process unlocked */ | |
__HAL_UNLOCK(hadc); | |
/* Return function status */ | |
return tmp_hal_status; | |
} | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
#endif /* HAL_ADC_MODULE_ENABLED */ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |