| /** |
| ****************************************************************************** |
| * @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****/ |
