/** ****************************************************************************** * @file stm32l0xx_hal_adc.c * @author MCD Application Team * @version V1.2.0 * @date 06-February-2015 * @brief This file provides firmware functions to manage the following * functionalities of the Analog to Digital Convertor (ADC) * peripheral: * + Initialization and de-initialization functions * ++ Initialization and Configuration of ADC * + Operation functions * ++ Start, stop, get result of conversions of regular * groups, using 3 possible modes : polling, interruption or DMA. * ++ Calibration feature * + Control functions * ++ Analog Watchdog configuration * ++ Regular Channels Configuration * + State functions * ++ ADC state machine management * ++ Interrupts and flags management * @verbatim ============================================================================== ##### ADC specific features ##### ============================================================================== [..] (#) 12-bit, 10-bit, 8-bit or 6-bit configurable resolution. (#) A built-in hardware oversampler allows to improve analog performances while off-loading the related computational burden from the CPU. (#) Interrupt generation at the end of conversion and in case of analog watchdog or overrun events. (#) Single and continuous conversion modes. (#) Scan or discontinuous mode conversion of channel 0 to channel 18. (#) Configurable scan direction (Upward from channel 0 to 18 or Backward from channel 18 to channel 0) (#) Data alignment with in-built data coherency. (#) Channel-wise programmable sampling time. (#) External trigger option with configurable polarity. (#) DMA request generation during regular channel conversion. (#) ADC supply requirements: 2.4 V to 3.6 V at full speed and down to 1.8 V at slower speed. (#) ADC input range: VREF- =VIN =VREF+. (#) ADC self-calibration. (#) ADC is automatically powered off (AutoOff mode) except during the active conversion phase. This dramatically reduces the power consumption of the ADC. (#) Wait mode to prevent ADC overrun in applications with low frequency. ##### How to use this driver ##### ============================================================================== [..] (#) Enable the ADC interface As prerequisite, into HAL_ADC_MspInit(), ADC clock must be configured at RCC top level. Depending on both possible clock sources: PCLK clock or ADC asynchronous clock. __HAL_RCC_ADC1_CLK_ENABLE(); (#) ADC pins configuration (++) Enable the clock for the ADC GPIOs using the following function: __HAL_RCC_GPIOx_CLK_ENABLE(); (++) Configure these ADC pins in analog mode using HAL_GPIO_Init(); (#) Configure the ADC parameters (conversion resolution, oversampler, data alignment, continuous mode,...) using the HAL_ADC_Init() function. (#) Activate the ADC peripheral using one of the start functions: HAL_ADC_Start(), HAL_ADC_Start_IT() or HAL_ADC_Start_DMA() *** Channels configuration *** =============================== [..] (+) To configure the ADC channels group, use HAL_ADC_ConfigChannel() function. (+) To read the ADC converted values, use the HAL_ADC_GetValue() function. *** DMA feature configuration *** ================================= [..] (+) To enable the DMA mode, use the HAL_ADC_Start_DMA() function. (+) To enable the generation of DMA requests continuously at the end of the last DMA transfer, set .Init.DMAContinuousRequests to ENABLE and call HAL_ADC_Init() function. @endverbatim ****************************************************************************** * @attention * *

© COPYRIGHT(c) 2015 STMicroelectronics

* * 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 "stm32l0xx_hal.h" /** @addtogroup STM32L0xx_HAL_Driver * @{ */ /** @addtogroup ADC * @brief ADC driver modules * @{ */ #ifdef HAL_ADC_MODULE_ENABLED /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Delay for ADC stabilization time. */ /* Maximum delay is 1us (refer to device datasheet, parameter tSTART). */ /* Unit: us */ #define ADC_STAB_DELAY_US ((uint32_t) 1) /* Delay for temperature sensor stabilization time. */ /* Maximum delay is 10us (refer to device datasheet, parameter tSTART). */ /* Unit: us */ #define ADC_TEMPSENSOR_DELAY_US ((uint32_t) 10) /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ static HAL_StatusTypeDef ADC_Enable(ADC_HandleTypeDef* hadc); static void ADC_DMAConvCplt(DMA_HandleTypeDef *hdma); static void ADC_DMAHalfConvCplt(DMA_HandleTypeDef *hdma); static void ADC_DMAError(DMA_HandleTypeDef *hdma); static HAL_StatusTypeDef ADC_ConversionStop(ADC_HandleTypeDef* hadc, uint32_t ConversionGroup); static HAL_StatusTypeDef ADC_Disable(ADC_HandleTypeDef* hadc); static void ADC_DelayMicroSecond(uint32_t microSecond); /* Private functions ---------------------------------------------------------*/ /** @defgroup ADC_Private_Functions * @{ */ /** @defgroup ADC_Group1 Initialization/de-initialization functions * @brief Initialization and Configuration functions * @verbatim =============================================================================== ##### Initialization and de-initialization functions ##### =============================================================================== [..] This section provides functions allowing to: (+) Initialize and configure the ADC. (+) De-initialize the ADC. @endverbatim * @{ */ /** * @brief Initializes the ADCx peripheral according to the specified parameters * in the ADC_InitStruct. * @note This function is used to configure the global features of the ADC * (ClockPrescaler, Resolution, Data Alignment and number of conversion), however, * the rest of the configuration parameters are specific to the regular * channels group (scan mode activation, continuous mode activation, * External trigger source and edge, DMA continuous request after the * last transfer and End of conversion selection). * * As prerequisite, into HAL_ADC_MspInit(), ADC clock must be * configured at RCC top level. * See commented example code below that can be copied * and uncommented into HAL_ADC_MspInit(). * * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval HAL status */ HAL_StatusTypeDef HAL_ADC_Init(ADC_HandleTypeDef* hadc) { uint32_t tickstart = 0x00; /* Check ADC handle */ if(hadc == NULL) { return HAL_ERROR; } /* Check the parameters */ assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); assert_param(IS_ADC_CLOCKPRESCALER(hadc->Init.ClockPrescaler)); assert_param(IS_ADC_RESOLUTION(hadc->Init.Resolution)); assert_param(IS_ADC_SAMPLE_TIME(hadc->Init.SamplingTime)); assert_param(IS_ADC_SCAN_MODE(hadc->Init.ScanConvMode)); assert_param(IS_ADC_DATA_ALIGN(hadc->Init.DataAlign)); assert_param(IS_FUNCTIONAL_STATE(hadc->Init.ContinuousConvMode)); assert_param(IS_FUNCTIONAL_STATE(hadc->Init.DiscontinuousConvMode)); assert_param(IS_ADC_EXTTRIG_EDGE(hadc->Init.ExternalTrigConvEdge)); assert_param(IS_ADC_EXTERNAL_TRIG_CONV(hadc->Init.ExternalTrigConv)); assert_param(IS_FUNCTIONAL_STATE(hadc->Init.DMAContinuousRequests)); assert_param(IS_ADC_EOC_SELECTION(hadc->Init.EOCSelection)); assert_param(IS_ADC_OVERRUN(hadc->Init.Overrun)); assert_param(IS_FUNCTIONAL_STATE(hadc->Init.LowPowerAutoWait)); assert_param(IS_FUNCTIONAL_STATE(hadc->Init.LowPowerFrequencyMode)); assert_param(IS_FUNCTIONAL_STATE(hadc->Init.LowPowerAutoPowerOff)); assert_param(IS_FUNCTIONAL_STATE(hadc->Init.OversamplingMode)); if(hadc->State == HAL_ADC_STATE_RESET) { /* Init the low level hardware */ HAL_ADC_MspInit(hadc); } /* Configuration of ADC parameters if previous preliminary actions are */ /* correctly completed. */ /* and if there is no conversion on going (ADC can be enabled anyway, */ /* in case of call of this function to update a parameter */ /* on the fly). */ if ((hadc->State == HAL_ADC_STATE_ERROR) || (ADC_IS_CONVERSION_ONGOING(hadc) != RESET) ) { /* Update ADC state machine to error */ hadc->State = HAL_ADC_STATE_ERROR; /* Process unlocked */ __HAL_UNLOCK(hadc); return HAL_ERROR; } /* Initialize the ADC state */ hadc->State = HAL_ADC_STATE_BUSY; /* Configuration of ADC clock: clock source PCLK or asynchronous with selectable prescaler */ __HAL_ADC_CLOCK_PRESCALER(hadc); /* Set the Low Frequency mode */ ADC->CCR &= (uint32_t)~ADC_CCR_LFMEN; ADC->CCR |=__HAL_ADC_CCR_LOWFREQUENCY(hadc->Init.LowPowerFrequencyMode); /* Enable voltage regulator (if disabled at this step) */ if (HAL_IS_BIT_CLR(hadc->Instance->CR, ADC_CR_ADVREGEN)) { /* Disable the ADC (if not already disabled) */ if (ADC_IS_ENABLE(hadc) != RESET ) { /* Check if conditions to disable the ADC are fulfilled */ if (ADC_DISABLING_CONDITIONS(hadc) != RESET) { __HAL_ADC_DISABLE(hadc); } else { hadc->State= HAL_ADC_STATE_ERROR; /* Process unlocked */ __HAL_UNLOCK(hadc); return HAL_ERROR; } /* Get timeout */ tickstart = HAL_GetTick(); /* Wait for disabling completion */ while(HAL_IS_BIT_SET(hadc->Instance->CR, ADC_CR_ADEN)) { /* Check for the Timeout */ if(ADC_ENABLE_TIMEOUT != HAL_MAX_DELAY) { if((HAL_GetTick() - tickstart ) > ADC_DISABLE_TIMEOUT) { hadc->State= HAL_ADC_STATE_TIMEOUT; /* Process unlocked */ __HAL_UNLOCK(hadc); return HAL_TIMEOUT; } } } } /* Set ADVREGEN bit */ hadc->Instance->CR |= ADC_CR_ADVREGEN; } /* Configuration of ADC: */ /* - Resolution */ /* - Data alignment */ /* - Scan direction */ /* - External trigger to start conversion */ /* - External trigger polarity */ /* - Continuous conversion mode */ /* - DMA continuous request */ /* - Overrun */ /* - AutoDelay feature */ /* - Discontinuous mode */ hadc->Instance->CFGR1 &= ~( ADC_CFGR1_RES | ADC_CFGR1_ALIGN | ADC_CFGR1_SCANDIR | ADC_CFGR1_EXTSEL | ADC_CFGR1_EXTEN | ADC_CFGR1_CONT | ADC_CFGR1_DMACFG | ADC_CFGR1_OVRMOD | ADC_CFGR1_AUTDLY | ADC_CFGR1_AUTOFF | ADC_CFGR1_DISCEN); hadc->Instance->CFGR1 |= ( hadc->Init.Resolution | hadc->Init.DataAlign | ADC_SCANDIR(hadc->Init.ScanConvMode) | hadc->Init.ExternalTrigConvEdge | ADC_CONTINUOUS(hadc->Init.ContinuousConvMode) | ADC_DMACONTREQ(hadc->Init.DMAContinuousRequests) | hadc->Init.Overrun | __HAL_ADC_CFGR1_AutoDelay(hadc->Init.LowPowerAutoWait) | __HAL_ADC_CFGR1_AUTOFF(hadc->Init.LowPowerAutoPowerOff)); /* Configure the external trigger only if Conversion edge is not "NONE" */ if (hadc->Init.ExternalTrigConvEdge != ADC_EXTERNALTRIGCONVEDGE_NONE) { hadc->Instance->CFGR1 |= hadc->Init.ExternalTrigConv; } /* Enable discontinuous mode only if continuous mode is disabled */ if ((hadc->Init.DiscontinuousConvMode == ENABLE) && (hadc->Init.ContinuousConvMode == DISABLE)) { /* Enable the selected ADC discontinuous mode */ hadc->Instance->CFGR1 |= ( ADC_CFGR1_DISCEN); } if (hadc->Init.OversamplingMode == ENABLE) { assert_param(IS_ADC_OVERSAMPLING_RATIO(hadc->Init.Oversample.Ratio)); assert_param(IS_ADC_RIGHT_BIT_SHIFT(hadc->Init.Oversample.RightBitShift)); assert_param(IS_ADC_TRIGGERED_OVERSAMPLING_MODE(hadc->Init.Oversample.TriggeredMode)); /* Configuration of Oversampler: */ /* - Oversampling Ratio */ /* - Right bit shift */ /* - Triggered mode */ hadc->Instance->CFGR2 &= ~( ADC_CFGR2_OVSR | ADC_CFGR2_OVSS | ADC_CFGR2_TOVS ); hadc->Instance->CFGR2 |= ( hadc->Init.Oversample.Ratio | hadc->Init.Oversample.RightBitShift | hadc->Init.Oversample.TriggeredMode ); /* Enable OverSampling mode */ hadc->Instance->CFGR2 |= ADC_CFGR2_OVSE; } else { /* Disable OverSampling mode */ hadc->Instance->CFGR2 &= ~ADC_CFGR2_OVSE; } /* Clear the old sampling time */ hadc->Instance->SMPR &= (uint32_t)(~ADC_SMPR_SMPR); /* Set the new sample time */ hadc->Instance->SMPR |= hadc->Init.SamplingTime; /* Set ADC error code to none */ hadc->ErrorCode = HAL_ADC_ERROR_NONE; /* Initialize the ADC state */ hadc->State = HAL_ADC_STATE_READY; /* Return function status */ return HAL_OK; } /** * @brief Deinitialize the ADC peripheral registers to its default reset values. * @note To not impact other ADCs, reset of common ADC registers have been * left commented below. * If needed, the example code can be copied and uncommented into * function HAL_ADC_MspDeInit(). * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval HAL status */ HAL_StatusTypeDef HAL_ADC_DeInit(ADC_HandleTypeDef* hadc) { uint32_t tickstart = 0; /* Check ADC handle */ if(hadc == NULL) { return HAL_ERROR; } /* Check the parameters */ assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); /* Change ADC state */ hadc->State = HAL_ADC_STATE_BUSY; /* Stop potential conversion ongoing */ if (HAL_IS_BIT_SET(hadc->Instance->CR, ADC_CR_ADSTART) && HAL_IS_BIT_CLR(hadc->Instance->CR, ADC_CR_ADDIS)) { /* Stop regular conversion */ hadc->Instance->CR |= ADC_CR_ADSTP; } /* Disable ADC: Solution to recover from an unknown ADC state (for example, */ /* in case of forbidden action on register bits) */ /* Procedure to disable the ADC peripheral: wait for conversions */ /* effectively stopped, then disable ADC */ /* 1. Wait until ADSTART = 0 */ /* Get timeout */ tickstart = HAL_GetTick(); while(HAL_IS_BIT_SET(hadc->Instance->CR, ADC_CR_ADSTART)) { /* Check for the Timeout */ if(ADC_STOP_CONVERSION_TIMEOUT != HAL_MAX_DELAY) { if((HAL_GetTick() - tickstart ) > ADC_STOP_CONVERSION_TIMEOUT) { hadc->State= HAL_ADC_STATE_TIMEOUT; /* Process unlocked */ __HAL_UNLOCK(hadc); return HAL_TIMEOUT; } } } /* 2. Disable the ADC peripheral */ __HAL_ADC_DISABLE(hadc); /* Reset ADC registers****************/ /* Reset register IER */ __HAL_ADC_DISABLE_IT(hadc, (ADC_IT_AWD | ADC_IT_OVR | ADC_IT_EOCAL | ADC_IT_EOS | \ ADC_IT_EOC | ADC_IT_RDY | ADC_IT_EOSMP )); /* Reset register ISR */ __HAL_ADC_CLEAR_FLAG(hadc, (ADC_FLAG_AWD | ADC_FLAG_EOCAL | ADC_FLAG_OVR | ADC_FLAG_EOS | \ ADC_FLAG_EOC | ADC_FLAG_EOSMP | ADC_FLAG_RDY)); /* Reset register CR */ /* Disable voltage regulator */ /* Note: Regulator disable useful for power saving */ /* Reset ADVREGEN bit */ hadc->Instance->CR &= ~ADC_CR_ADVREGEN; /* Bits ADC_CR_ADSTP, ADC_CR_ADSTART are in access mode "read-set": no direct reset applicable */ /* No action */ /* Reset register CFGR1 */ hadc->Instance->CFGR1 &= ~(ADC_CFGR1_AWDCH | ADC_CFGR1_AWDEN | ADC_CFGR1_AWDSGL | \ ADC_CFGR1_DISCEN | ADC_CFGR1_AUTOFF | ADC_CFGR1_AUTDLY | \ ADC_CFGR1_CONT | ADC_CFGR1_OVRMOD | ADC_CFGR1_EXTEN | \ ADC_CFGR1_EXTSEL | ADC_CFGR1_ALIGN | ADC_CFGR1_RES | \ ADC_CFGR1_SCANDIR| ADC_CFGR1_DMACFG | ADC_CFGR1_DMAEN); /* Reset register CFGR2 */ hadc->Instance->CFGR2 &= ~(ADC_CFGR2_TOVS | ADC_CFGR2_OVSS | ADC_CFGR2_OVSR | \ ADC_CFGR2_OVSE | ADC_CFGR2_CKMODE ); /* Reset register SMPR */ hadc->Instance->SMPR &= ~(ADC_SMPR_SMPR); /* Reset register TR */ hadc->Instance->TR &= ~(ADC_TR_LT | ADC_TR_HT); /* Reset register CALFACT */ hadc->Instance->CALFACT &= ~(ADC_CALFACT_CALFACT); /* Reset register DR */ /* bits in access mode read only, no direct reset applicable*/ /* Reset register CALFACT */ hadc->Instance->CALFACT &= ~(ADC_CALFACT_CALFACT); /* DeInit the low level hardware */ HAL_ADC_MspDeInit(hadc); /* Set ADC error code to none */ hadc->ErrorCode = HAL_ADC_ERROR_NONE; /* Change ADC state */ hadc->State = HAL_ADC_STATE_RESET; /* Return function status */ return HAL_OK; } /** * @brief Initializes the ADC MSP. * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval None */ __weak void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc) { /* NOTE : This function Should not be modified, when the callback is needed, the HAL_ADC_MspInit could be implemented in the user file */ } /** * @brief DeInitializes the ADC MSP. * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval None */ __weak void HAL_ADC_MspDeInit(ADC_HandleTypeDef* hadc) { /* NOTE : This function Should not be modified, when the callback is needed, the HAL_ADC_MspDeInit could be implemented in the user file */ } /** * @} */ /** @defgroup ADC_Group2 I/O operation functions * @brief I/O operation functions * @verbatim =============================================================================== ##### IO operation functions ##### =============================================================================== [..] This section provides functions allowing to: (+) Start conversion. (+) Stop conversion. (+) poll for conversion complete. (+) poll for conversion event. (+) Start conversion and enable interrupt. (+) Stop conversion and disable interrupt. (+) handle ADC interrupt request. (+) Start conversion of regular channel and enable DMA transfer. (+) Stop conversion of regular channel and disable DMA transfer. (+) Get result of regular channel conversion. (+) Handle ADC interrupt request. @endverbatim * @{ */ /** * @brief Enables ADC and starts conversion of the regular channels. * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval HAL status */ HAL_StatusTypeDef HAL_ADC_Start(ADC_HandleTypeDef* hadc) { HAL_StatusTypeDef tmpHALStatus = HAL_OK; /* Check the parameters */ assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); /* Perform ADC enable and conversion start if no conversion is on going */ if (ADC_IS_CONVERSION_ONGOING(hadc) == RESET) { /* Process locked */ __HAL_LOCK(hadc); /* Change ADC state */ hadc->State = HAL_ADC_STATE_BUSY_REG; /* Set ADC error code to none */ hadc->ErrorCode = HAL_ADC_ERROR_NONE; /* Enable the ADC peripheral */ /* If low power mode AutoPowerOff is enabled, power-on/off phases are */ /* performed automatically by hardware. */ if (hadc->Init.LowPowerAutoPowerOff != ENABLE) { tmpHALStatus = ADC_Enable(hadc); } /* Start conversion if ADC is effectively enabled */ if (tmpHALStatus != HAL_ERROR) { /* ADC start conversion command */ hadc->Instance->CR |= ADC_CR_ADSTART; } /* Process unlocked */ __HAL_UNLOCK(hadc); } else { tmpHALStatus = HAL_BUSY; } /* Return function status */ return tmpHALStatus; } /** * @brief Stop ADC conversion of regular channels, disable ADC peripheral. * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval None */ HAL_StatusTypeDef HAL_ADC_Stop(ADC_HandleTypeDef* hadc) { HAL_StatusTypeDef tmpHALStatus = HAL_OK; /* Process locked */ __HAL_LOCK(hadc); /* 1. Stop potential conversion ongoing (regular conversion) */ tmpHALStatus = ADC_ConversionStop(hadc, ADC_REGULAR_GROUP); /* 2. Disable ADC peripheral if conversions are effectively stopped */ if (tmpHALStatus != HAL_ERROR) { /* Disable the ADC peripheral */ tmpHALStatus = ADC_Disable(hadc); /* Check if ADC is effectively disabled */ if ((hadc->State != HAL_ADC_STATE_ERROR) && (tmpHALStatus != HAL_ERROR)) { /* Change ADC state */ hadc->State = HAL_ADC_STATE_READY; } else { return HAL_ERROR; } } else { return HAL_ERROR; } /* Process unlocked */ __HAL_UNLOCK(hadc); /* Return function status */ return HAL_OK; } /** * @brief Wait for regular group conversion to be completed. * @note ADC conversion flags EOS (end of sequence) and EOC (end of * conversion) are cleared by this function, with an exception: * if low power feature "LowPowerAutoWait" is enabled, flags are * not cleared to not interfere with this feature until data register * is read using function HAL_ADC_GetValue(). * @note This function cannot be used in a particular setup: ADC configured * in DMA mode and polling for end of each conversion (ADC init * parameter "EOCSelection" set to ADC_EOC_SINGLE_CONV). * In this case, DMA resets the flag EOC and polling cannot be * performed on each conversion. Nevertheless, polling can still * be performed on the complete sequence. * @param hadc: ADC handle * @param Timeout: Timeout value in millisecond. * @retval HAL status */ HAL_StatusTypeDef HAL_ADC_PollForConversion(ADC_HandleTypeDef* hadc, uint32_t Timeout) { uint32_t tickstart = 0; uint32_t tmp_Flag_EOC; /* Check the parameters */ assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); /* If end of conversion selected to end of sequence */ if (hadc->Init.EOCSelection == ADC_EOC_SEQ_CONV) { tmp_Flag_EOC = ADC_FLAG_EOS; } /* If end of conversion selected to end of each conversion */ else /* ADC_EOC_SINGLE_CONV */ { /* Verification that ADC configuration is compliant with polling for */ /* each conversion: */ /* Particular case is ADC configured in DMA mode and ADC sequencer with */ /* several ranks and polling for end of each conversion. */ /* For code simplicity sake, this particular case is generalized to */ /* ADC configured in DMA mode and and polling for end of each conversion. */ if (HAL_IS_BIT_SET(hadc->Instance->CFGR1, ADC_CFGR1_DMAEN)) { /* Update ADC state machine to error */ hadc->State = HAL_ADC_STATE_ERROR; /* Process unlocked */ __HAL_UNLOCK(hadc); return HAL_ERROR; } else { tmp_Flag_EOC = (ADC_FLAG_EOC | ADC_FLAG_EOS); } } /* Get tick */ tickstart = HAL_GetTick(); /* Wait until End of Conversion flag is raised */ while(HAL_IS_BIT_CLR(hadc->Instance->ISR, tmp_Flag_EOC)) { /* Check if timeout is disabled (set to infinite wait) */ if(Timeout != HAL_MAX_DELAY) { if((Timeout == 0) || ((HAL_GetTick()-tickstart) > Timeout)) { /* Update ADC state machine to timeout */ hadc->State = HAL_ADC_STATE_TIMEOUT; /* Process unlocked */ __HAL_UNLOCK(hadc); return HAL_TIMEOUT; } } } /* Clear end of conversion flag of regular group if low power feature */ /* "LowPowerAutoWait " is disabled, to not interfere with this feature */ /* until data register is read using function HAL_ADC_GetValue(). */ if (hadc->Init.LowPowerAutoWait == DISABLE) { /* Clear regular group conversion flag */ __HAL_ADC_CLEAR_FLAG(hadc, (ADC_FLAG_EOC | ADC_FLAG_EOS)); } /* Update state machine on conversion status if not in error state */ if(hadc->State != HAL_ADC_STATE_ERROR) { /* Change ADC state */ hadc->State = HAL_ADC_STATE_EOC; } /* Return ADC state */ return HAL_OK; } /** * @brief Poll for conversion event. * @param hadc: ADC handle. * @param EventType: the ADC event type. * This parameter can be one of the following values: * @arg ADC_AWD_EVENT: ADC Analog watchdog event. * @arg ADC_OVR_EVENT: ADC Overrun event. * @param Timeout: Timeout value in millisecond. * @retval HAL status */ HAL_StatusTypeDef HAL_ADC_PollForEvent(ADC_HandleTypeDef* hadc, uint32_t EventType, uint32_t Timeout) { uint32_t tickstart = 0; /* Check the parameters */ assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); assert_param(IS_ADC_EVENT_TYPE(EventType)); /* Get timeout */ tickstart = HAL_GetTick(); /* Check selected event flag */ while(!(__HAL_ADC_GET_FLAG(hadc,EventType))) { /* Check if timeout is disabled (set to infinite wait) */ if(Timeout != HAL_MAX_DELAY) { if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout)) { /* Update ADC state machine to timeout */ hadc->State = HAL_ADC_STATE_TIMEOUT; /* Process unlocked */ __HAL_UNLOCK(hadc); return HAL_TIMEOUT; } } } switch(EventType) { /* Check analog watchdog flag */ case ADC_AWD_EVENT: /* Change ADC state */ hadc->State = HAL_ADC_STATE_AWD; /* Clear ADC analog watchdog flag */ __HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_AWD); break; /* Case ADC_OVR_EVENT */ default: /* Change ADC state */ hadc->State = HAL_ADC_STATE_ERROR; /* Clear ADC Overrun flag */ __HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_OVR); break; } /* Return ADC state */ return HAL_OK; } /** * @brief Enables the interrupt and starts ADC conversion of regular channels. * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval HAL status. */ HAL_StatusTypeDef HAL_ADC_Start_IT(ADC_HandleTypeDef* hadc) { HAL_StatusTypeDef tmpHALStatus = HAL_OK; /* Check the parameters */ assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); /* Perform ADC enable and conversion start if no conversion is on going */ if (ADC_IS_CONVERSION_ONGOING(hadc) == RESET) { /* Process locked */ __HAL_LOCK(hadc); /* State machine update: Change ADC state */ hadc->State = HAL_ADC_STATE_BUSY_REG; /* Set ADC error code to none */ hadc->ErrorCode = HAL_ADC_ERROR_NONE; /* Enable the ADC peripheral */ /* If low power mode AutoPowerOff is enabled, power-on/off phases are */ /* performed automatically by hardware. */ if (hadc->Init.LowPowerAutoPowerOff != ENABLE) { tmpHALStatus = ADC_Enable(hadc); } /* Start conversion if ADC is effectively enabled */ if (tmpHALStatus != HAL_ERROR) { /* Enable ADC overrun interrupt */ __HAL_ADC_ENABLE_IT(hadc, ADC_IT_OVR); /* Enable ADC end of conversion interrupt */ switch(hadc->Init.EOCSelection) { case ADC_EOC_SEQ_CONV: __HAL_ADC_DISABLE_IT(hadc, ADC_IT_EOC); __HAL_ADC_ENABLE_IT(hadc, ADC_IT_EOS); break; /* case ADC_EOC_SINGLE_CONV */ default: __HAL_ADC_DISABLE_IT(hadc, ADC_IT_EOS); __HAL_ADC_ENABLE_IT(hadc, ADC_IT_EOC); break; } /* ADC start conversion command */ hadc->Instance->CR |= ADC_CR_ADSTART; } else { tmpHALStatus = HAL_ERROR; } /* Process unlocked */ __HAL_UNLOCK(hadc); } else { tmpHALStatus = HAL_BUSY; } /* Return function status */ return tmpHALStatus; } /** * @brief Stop ADC conversion of regular channels, disable interruptions * EOC/EOS/OVR, disable ADC peripheral. * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval None */ HAL_StatusTypeDef HAL_ADC_Stop_IT(ADC_HandleTypeDef* hadc) { HAL_StatusTypeDef tmpHALStatus = HAL_OK; /* Process locked */ __HAL_LOCK(hadc); /* 1. Stop potential conversion ongoing (regular conversion) */ tmpHALStatus = ADC_ConversionStop(hadc, ADC_REGULAR_GROUP); /* 2. Disable ADC peripheral if conversions are effectively stopped */ if (tmpHALStatus != HAL_ERROR) { /* Disable ADC interrupts */ __HAL_ADC_DISABLE_IT(hadc, (ADC_IT_EOC | ADC_IT_EOS | ADC_IT_OVR)); /* Disable the ADC peripheral */ tmpHALStatus = ADC_Disable(hadc); /* Check if ADC is effectively disabled */ if ((hadc->State != HAL_ADC_STATE_ERROR) && (tmpHALStatus != HAL_ERROR)) { /* Change ADC state */ hadc->State = HAL_ADC_STATE_READY; } else { return HAL_ERROR; } } else { return HAL_ERROR; } /* Process unlocked */ __HAL_UNLOCK(hadc); /* Return function status */ return HAL_OK; } /** * @brief Handles ADC interrupt request * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval None */ void HAL_ADC_IRQHandler(ADC_HandleTypeDef* hadc) { /* Check the parameters */ assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); assert_param(IS_ADC_EOC_SELECTION(hadc->Init.EOCSelection)); /* Check End of Conversion flag for regular channels */ if( (__HAL_ADC_GET_FLAG(hadc, ADC_FLAG_EOC) && __HAL_ADC_GET_IT_SOURCE(hadc, ADC_IT_EOC)) || \ (__HAL_ADC_GET_FLAG(hadc, ADC_FLAG_EOS) && __HAL_ADC_GET_IT_SOURCE(hadc, ADC_IT_EOS)) ) { /* Change ADC state */ hadc->State = HAL_ADC_STATE_EOC; /* Disable interruption if no further conversion upcoming by continuous mode or external trigger */ if((hadc->Init.ContinuousConvMode == DISABLE) && \ (hadc->Init.ExternalTrigConvEdge == ADC_EXTERNALTRIGCONVEDGE_NONE) ) { /* Allowed to modify bits ADC_IT_EOC/ADC_IT_EOS only if bit ADSTART==0 (no conversion on going) */ if (HAL_IS_BIT_CLR(hadc->Instance->CR, ADC_CR_ADSTART)) { /* Cases of interruption after each conversion or after each sequence */ /* If interruption after each sequence */ if (hadc->Init.EOCSelection == ADC_EOC_SEQ_CONV) { /* Allowed to modify bits ADC_IT_EOC/ADC_IT_EOS/ADC_IT_OVR only if bit*/ /* ADSTART==0 (no conversion on going) */ if (ADC_IS_CONVERSION_ONGOING(hadc) == RESET) { /* If End of Sequence is reached, disable interrupts */ if( __HAL_ADC_GET_FLAG(hadc, ADC_FLAG_EOS) ) { /* DISABLE ADC end of sequence conversion interrupt */ /* DISABLE ADC overrun interrupt */ __HAL_ADC_DISABLE_IT(hadc, ADC_IT_EOC | ADC_IT_EOS | ADC_IT_OVR); } } else { /* Change ADC state to error state */ hadc->State = HAL_ADC_STATE_ERROR; /* Set ADC error code to ADC IP internal error */ hadc->ErrorCode |= HAL_ADC_ERROR_INTERNAL; } } /* If interruption after each conversion */ else { /* DISABLE ADC end of single conversion interrupt */ /* DISABLE ADC overrun interrupt */ __HAL_ADC_DISABLE_IT(hadc, ADC_IT_EOC | ADC_IT_OVR); } } else { /* Change ADC state to error state */ hadc->State = HAL_ADC_STATE_ERROR; } } /* Conversion complete callback */ /* Note: into callback, to determine if callback has been triggered from EOC or EOS, */ /* it is possible to use: if( __HAL_ADC_GET_FLAG(hadc, ADC_FLAG_EOS)) */ HAL_ADC_ConvCpltCallback(hadc); /* Clear regular channels conversion flag */ if (hadc->Init.LowPowerAutoWait != ENABLE) { __HAL_ADC_CLEAR_FLAG(hadc, (ADC_FLAG_EOC | ADC_FLAG_EOS) ); } } /* Check Analog watchdog flags */ if( (__HAL_ADC_GET_FLAG(hadc, ADC_FLAG_AWD) && __HAL_ADC_GET_IT_SOURCE(hadc, ADC_IT_AWD))) { /* Change ADC state */ hadc->State = HAL_ADC_STATE_AWD; /* Level out of window callback */ HAL_ADC_LevelOutOfWindowCallback(hadc); /* Clear ADC Analog watchdog flag */ __HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_AWD); } /* Check Overrun flag */ if(__HAL_ADC_GET_FLAG(hadc, ADC_FLAG_OVR) && __HAL_ADC_GET_IT_SOURCE(hadc, ADC_IT_OVR)) { /* Change ADC state to overrun state */ hadc->State = HAL_ADC_STATE_ERROR; /* Set ADC error code to overrun */ hadc->ErrorCode |= HAL_ADC_ERROR_OVR; /* Clear the Overrun flag */ __HAL_ADC_CLEAR_FLAG(hadc,ADC_FLAG_OVR); /* Error callback */ HAL_ADC_ErrorCallback(hadc); } } /** * @brief Enables ADC DMA request after last transfer (Single-ADC mode) and enables ADC peripheral * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @param pData: The destination Buffer address. * @param Length: The length of data to be transferred from ADC peripheral to memory. * @retval None */ HAL_StatusTypeDef HAL_ADC_Start_DMA(ADC_HandleTypeDef* hadc, uint32_t* pData, uint32_t Length) { HAL_StatusTypeDef tmpHALStatus = HAL_OK; /* Check the parameters */ assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); /* Perform ADC enable and conversion start if no conversion is on going */ if (ADC_IS_CONVERSION_ONGOING(hadc) == RESET) { /* Process locked */ __HAL_LOCK(hadc); /* Change ADC state */ hadc->State = HAL_ADC_STATE_BUSY_REG; /* Set ADC error code to none */ hadc->ErrorCode = HAL_ADC_ERROR_NONE; /* Enable the ADC peripheral */ /* If low power mode AutoPowerOff is enabled, power-on/off phases are */ /* performed automatically by hardware. */ if (hadc->Init.LowPowerAutoPowerOff != ENABLE) { tmpHALStatus = ADC_Enable(hadc); } /* Start conversion if ADC is effectively enabled */ if (tmpHALStatus != HAL_ERROR) { /* Enable ADC DMA mode */ hadc->Instance->CFGR1 |= ADC_CFGR1_DMAEN; /* Set the DMA transfer complete callback */ hadc->DMA_Handle->XferCpltCallback = ADC_DMAConvCplt; /* Set the DMA half transfer complete callback */ hadc->DMA_Handle->XferHalfCpltCallback = ADC_DMAHalfConvCplt; /* Set the DMA error callback */ hadc->DMA_Handle->XferErrorCallback = ADC_DMAError; /* Manage ADC and DMA start: ADC overrun interruption, DMA start, ADC start (in case of SW start) */ /* Enable ADC overrun interrupt */ __HAL_ADC_ENABLE_IT(hadc, ADC_IT_OVR); /* Enable the DMA Stream */ HAL_DMA_Start_IT(hadc->DMA_Handle, (uint32_t)&hadc->Instance->DR, (uint32_t)pData, Length); /* ADC start conversion command */ hadc->Instance->CR |= ADC_CR_ADSTART; } /* Process unlocked */ __HAL_UNLOCK(hadc); } else { tmpHALStatus = HAL_BUSY; } /* Return function status */ return tmpHALStatus; } /** * @brief Disable ADC DMA (Single-ADC mode), disable ADC peripheral * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval None */ HAL_StatusTypeDef HAL_ADC_Stop_DMA(ADC_HandleTypeDef* hadc) { HAL_StatusTypeDef tmpHALStatus = HAL_OK; /* Process locked */ __HAL_LOCK(hadc); /* 1. Stop potential conversion ongoing (regular conversion) */ tmpHALStatus = ADC_ConversionStop(hadc, ADC_REGULAR_GROUP); /* 2. Disable ADC peripheral if conversions are effectively stopped */ if (tmpHALStatus != HAL_ERROR) { /* Disable ADC DMA (ADC DMA configuration ADC_CFGR_DMACFG is kept) */ hadc->Instance->CFGR1 &= ~ADC_CFGR1_DMAEN; /* Disable the DMA Stream */ if (HAL_DMA_Abort(hadc->DMA_Handle) != HAL_OK) { /* Update ADC state machine to error */ hadc->State = HAL_ADC_STATE_ERROR; /* Process unlocked */ __HAL_UNLOCK(hadc); return HAL_ERROR; } /* Disable ADC overrun interrupt */ __HAL_ADC_DISABLE_IT(hadc, ADC_IT_OVR); /* Disable the ADC peripheral */ tmpHALStatus = ADC_Disable(hadc); /* Check if ADC is effectively disabled */ if ((hadc->State != HAL_ADC_STATE_ERROR) && (tmpHALStatus != HAL_ERROR)) { /* Change ADC state */ hadc->State = HAL_ADC_STATE_READY; } else { return HAL_ERROR; } } else { return HAL_ERROR; } /* Process unlocked */ __HAL_UNLOCK(hadc); /* Return function status */ return HAL_OK; } /** * @brief Gets the converted value from data register of regular channel. * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval Converted value */ uint32_t HAL_ADC_GetValue(ADC_HandleTypeDef* hadc) { /* Return the selected ADC converted value */ return hadc->Instance->DR; } /** * @brief Regular conversion complete callback in non blocking mode * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval None */ __weak void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc) { /* NOTE : This function Should not be modified, when the callback is needed, the HAL_ADC_ConvCpltCallback could be implemented in the user file */ } /** * @brief Regular conversion half DMA transfer callback in non blocking mode * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval None */ __weak void HAL_ADC_ConvHalfCpltCallback(ADC_HandleTypeDef* hadc) { /* NOTE : This function Should not be modified, when the callback is needed, the HAL_ADC_ConvHalfCpltCallback could be implemented in the user file */ } /** * @brief Analog watchdog callback in non blocking mode * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval None */ __weak void HAL_ADC_LevelOutOfWindowCallback(ADC_HandleTypeDef* hadc) { /* NOTE : This function Should not be modified, when the callback is needed, the HAL_ADC_LevelOoutOfWindowCallback could be implemented in the user file */ } /** * @brief Error ADC callback. * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval None */ __weak void HAL_ADC_ErrorCallback(ADC_HandleTypeDef *hadc) { /* NOTE : This function Should not be modified, when the callback is needed, the HAL_ADC_ErrorCallback could be implemented in the user file */ } /** * @} */ /** @defgroup ADC_Group3 Peripheral Control functions * @brief Peripheral Control functions * @verbatim =============================================================================== ##### Peripheral Control functions ##### =============================================================================== [..] This section provides functions allowing to: (+) Configure channels. (+) Configure the analog watch dog. @endverbatim * @{ */ /** * @brief Configures the selected ADC regular channel: sampling time, * offset,. * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @param sConfig: ADC regular channel configuration structure. * @retval HAL status */ HAL_StatusTypeDef HAL_ADC_ConfigChannel(ADC_HandleTypeDef* hadc, ADC_ChannelConfTypeDef* sConfig) { /* Check the parameters */ assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); assert_param(IS_ADC_CHANNEL(sConfig->Channel)); /* Process locked */ __HAL_LOCK(hadc); /* Parameters update conditioned to ADC state: */ /* Parameters that can be updated when ADC is disabled or enabled without */ /* conversion on going : */ /* - Channel number */ /* - Management of internal measurement channels: Vbat/VrefInt/TempSensor */ if (ADC_IS_CONVERSION_ONGOING(hadc) != RESET) { /* Update ADC state machine to error */ hadc->State = HAL_ADC_STATE_ERROR; /* Process unlocked */ __HAL_UNLOCK(hadc); return HAL_ERROR; } /* Enable selected channels */ hadc->Instance->CHSELR |= (uint32_t)(sConfig->Channel & ADC_CHANNEL_MASK); /* Management of internal measurement channels: Vlcd/VrefInt/TempSensor */ /* internal measurement paths enable: If internal channel selected, enable */ /* dedicated internal buffers and path. */ /* If Temperature sensor channel is selected, then enable the internal */ /* buffers and path */ if (((sConfig->Channel & ADC_CHANNEL_MASK) & ADC_CHANNEL_TEMPSENSOR ) == (ADC_CHANNEL_TEMPSENSOR & ADC_CHANNEL_MASK)) { ADC->CCR |= ADC_CCR_TSEN; /* Delay for temperature sensor stabilization time */ ADC_DelayMicroSecond(ADC_TEMPSENSOR_DELAY_US); } /* If VRefInt channel is selected, then enable the internal buffers and path */ if (((sConfig->Channel & ADC_CHANNEL_MASK) & ADC_CHANNEL_VREFINT) == (ADC_CHANNEL_VREFINT & ADC_CHANNEL_MASK)) { ADC->CCR |= ADC_CCR_VREFEN; } /* If Vlcd channel is selected, then enable the internal buffers and path */ if (((sConfig->Channel & ADC_CHANNEL_MASK) & ADC_CHANNEL_VLCD) == (ADC_CHANNEL_VLCD & ADC_CHANNEL_MASK)) { ADC->CCR |= ADC_CCR_VLCDEN; } /* Process unlocked */ __HAL_UNLOCK(hadc); /* Return function status */ return HAL_OK; } /** * @brief Configures the analog watchdog. * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @param AnalogWDGConfig : pointer to an ADC_AnalogWDGConfTypeDef structure * that contains the configuration information of ADC analog watchdog. * @retval HAL status */ HAL_StatusTypeDef HAL_ADC_AnalogWDGConfig(ADC_HandleTypeDef* hadc, ADC_AnalogWDGConfTypeDef* AnalogWDGConfig) { uint32_t tmpAWDHighThresholdShifted; uint32_t tmpAWDLowThresholdShifted; /* Check the parameters */ assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); assert_param(IS_ADC_ANALOG_WATCHDOG_MODE(AnalogWDGConfig->WatchdogMode)); assert_param(IS_ADC_CHANNEL(AnalogWDGConfig->Channel)); assert_param(IS_FUNCTIONAL_STATE(AnalogWDGConfig->ITMode)); assert_param(IS_ADC_RANGE(ADC_GET_RESOLUTION(hadc), AnalogWDGConfig->HighThreshold)); assert_param(IS_ADC_RANGE(ADC_GET_RESOLUTION(hadc), AnalogWDGConfig->LowThreshold)); /* Process locked */ __HAL_LOCK(hadc); /* Parameters update conditioned to ADC state: */ /* Parameters that can be updated when ADC is disabled or enabled without */ /* conversion on going : */ /* - Analog watchdog channels */ /* - Analog watchdog thresholds */ if (ADC_IS_CONVERSION_ONGOING(hadc) != RESET) { /* Update ADC state machine to error */ hadc->State = HAL_ADC_STATE_ERROR; /* Process unlocked */ __HAL_UNLOCK(hadc); return HAL_ERROR; } /* Configure ADC Analog watchdog interrupt */ if(AnalogWDGConfig->ITMode == ENABLE) { /* Enable the ADC Analog watchdog interrupt */ __HAL_ADC_ENABLE_IT(hadc, ADC_IT_AWD); } else { /* Disable the ADC Analog watchdog interrupt */ __HAL_ADC_DISABLE_IT(hadc, ADC_IT_AWD); } /* Configuration of analog watchdog: */ /* - Set the analog watchdog mode */ /* - Set the Analog watchdog channel (is not used if watchdog */ /* mode "all channels": ADC_CFGR1_AWD1SGL=0) */ hadc->Instance->CFGR1 &= ~( ADC_CFGR1_AWDSGL | ADC_CFGR1_AWDEN | ADC_CFGR1_AWDCH); hadc->Instance->CFGR1 |= ( AnalogWDGConfig->WatchdogMode | (AnalogWDGConfig->Channel & ADC_CHANNEL_AWD_MASK)); /* Shift the offset in function of the selected ADC resolution: Thresholds */ /* have to be left-aligned on bit 11, the LSB (right bits) are set to 0 */ tmpAWDHighThresholdShifted = ADC_AWD1THRESHOLD_SHIFT_RESOLUTION(hadc, AnalogWDGConfig->HighThreshold); tmpAWDLowThresholdShifted = ADC_AWD1THRESHOLD_SHIFT_RESOLUTION(hadc, AnalogWDGConfig->LowThreshold); /* Clear High & Low high thresholds */ hadc->Instance->TR &= (uint32_t) ~ (ADC_TR_HT | ADC_TR_LT); /* Set the high threshold */ hadc->Instance->TR = ADC_TRX_HIGHTHRESHOLD (tmpAWDHighThresholdShifted); /* Set the low threshold */ hadc->Instance->TR |= tmpAWDLowThresholdShifted; /* Process unlocked */ __HAL_UNLOCK(hadc); /* Return function status */ return HAL_OK; } /** * @} */ /** @defgroup ADC_Group4 ADC Peripheral State functions * @brief ADC Peripheral State functions * @verbatim =============================================================================== ##### ADC Peripheral State functions ##### =============================================================================== [..] This subsection provides functions allowing to (+) Check the ADC state. (+) handle ADC interrupt request. @endverbatim * @{ */ /** * @brief return the ADC state * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval HAL state */ HAL_ADC_StateTypeDef HAL_ADC_GetState(ADC_HandleTypeDef* hadc) { /* Return ADC state */ return hadc->State; } /** * @brief Return the ADC error code * @param hadc: pointer to a ADC_HandleTypeDef structure that contains * the configuration information for the specified ADC. * @retval ADC Error Code */ uint32_t HAL_ADC_GetError(ADC_HandleTypeDef *hadc) { return hadc->ErrorCode; } /** * @} */ /** * @brief Enable the selected ADC. * @note Prerequisite condition to use this function: ADC must be disabled * and voltage regulator must be enabled (done into HAL_ADC_Init()). * @note If low power mode AutoPowerOff is enabled, power-on/off phases are * performed automatically by hardware. * In this mode, this function is useless and must not be called because * flag ADC_FLAG_RDY is not usable. * Therefore, this function must be called under condition of * "if (hadc->Init.LowPowerAutoPowerOff != ENABLE)". * @param hadc: ADC handle * @retval HAL status. */ static HAL_StatusTypeDef ADC_Enable(ADC_HandleTypeDef* hadc) { uint32_t tickstart = 0; /* ADC enable and wait for ADC ready (in case of ADC is disabled or */ /* enabling phase not yet completed: flag ADC ready not yet set). */ /* Timeout implemented to not be stuck if ADC cannot be enabled (possible */ /* causes: ADC clock not running, ...). */ if (ADC_IS_ENABLE(hadc) == RESET) { /* Check if conditions to enable the ADC are fulfilled */ if (ADC_ENABLING_CONDITIONS(hadc) == RESET) { /* Update ADC state machine to error */ hadc->State = HAL_ADC_STATE_ERROR; /* Set ADC error code to ADC IP internal error */ hadc->ErrorCode |= HAL_ADC_ERROR_INTERNAL; return HAL_ERROR; } /* Enable the ADC peripheral */ __HAL_ADC_ENABLE(hadc); /* Delay for ADC stabilization time. */ ADC_DelayMicroSecond(ADC_STAB_DELAY_US); /* Wait for ADC effectively enabled */ /* Get timeout */ tickstart = HAL_GetTick(); /* Skip polling for RDY ADRDY when AutoOFF is enabled */ if (hadc->Init.LowPowerAutoPowerOff != ENABLE) { while(__HAL_ADC_GET_FLAG(hadc, ADC_FLAG_RDY) == RESET) { /* Check for the Timeout */ if(ADC_ENABLE_TIMEOUT != HAL_MAX_DELAY) { if((HAL_GetTick() - tickstart ) > ADC_ENABLE_TIMEOUT) { /* Update ADC state machine to error */ hadc->State = HAL_ADC_STATE_ERROR; /* Set ADC error code to ADC IP internal error */ hadc->ErrorCode |= HAL_ADC_ERROR_INTERNAL; return HAL_ERROR; } } } } } /* Return HAL status */ return HAL_OK; } /** * @brief Disable the selected ADC. * @note Prerequisite condition to use this function: ADC conversions must be * stopped to disable the ADC. * @param hadc: ADC handle * @retval HAL status. */ static HAL_StatusTypeDef ADC_Disable(ADC_HandleTypeDef* hadc) { uint32_t tickstart = 0; /* Verification if ADC is not already disabled: */ /* forbidden to disable ADC (set bit ADC_CR_ADDIS) if ADC is already */ /* disabled. */ if (ADC_IS_ENABLE(hadc) != RESET ) { /* Check if conditions to disable the ADC are fulfilled */ if (ADC_DISABLING_CONDITIONS(hadc) != RESET) { /* Disable the ADC peripheral */ __HAL_ADC_DISABLE(hadc); } else { /* Update ADC state machine to error */ hadc->State = HAL_ADC_STATE_ERROR; /* Set ADC error code to ADC internal error */ hadc->ErrorCode |= HAL_ADC_ERROR_INTERNAL; return HAL_ERROR; } /* Wait for ADC effectively disabled */ /* Get timeout */ tickstart = HAL_GetTick(); while(HAL_IS_BIT_SET(hadc->Instance->CR, ADC_CR_ADEN)) { /* Check for the Timeout */ if(ADC_ENABLE_TIMEOUT != HAL_MAX_DELAY) { if((HAL_GetTick() - tickstart ) > ADC_DISABLE_TIMEOUT) { /* Update ADC state machine to error */ hadc->State = HAL_ADC_STATE_ERROR; /* Set ADC error code to ADC internal error */ hadc->ErrorCode |= HAL_ADC_ERROR_INTERNAL; return HAL_ERROR; } } } } /* Return HAL status */ return HAL_OK; } /** * @brief Stop ADC conversion. * @note Prerequisite condition to use this function: ADC conversions must be * stopped to disable the ADC. * @param hadc: ADC handle * @param ConversionGroup: Only ADC group regular. * This parameter can be one of the following values: * @arg ADC_REGULAR_GROUP: ADC regular conversion type. * @retval HAL status. */ static HAL_StatusTypeDef ADC_ConversionStop(ADC_HandleTypeDef* hadc, uint32_t ConversionGroup) { uint32_t tickstart = 0 ; /* Check the parameters */ assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); assert_param(IS_ADC_CONVERSION_GROUP(ConversionGroup)); /* Parameters update conditioned to ADC state: */ /* Parameters that can be updated when ADC is disabled or enabled without */ /* conversion on going : */ if (ADC_IS_CONVERSION_ONGOING(hadc) != RESET) { /* Update ADC state machine to error */ hadc->State = HAL_ADC_STATE_ERROR; /* Process unlocked */ return HAL_ERROR; } /* Verification: if ADC is not already stopped, bypass this function */ if (HAL_IS_BIT_SET(hadc->Instance->CR, ADC_CR_ADSTART)) { /* Stop potential conversion on regular group */ if (ConversionGroup == ADC_REGULAR_GROUP) { /* Software is allowed to set ADSTP only when ADSTART=1 and ADDIS=0 */ if (HAL_IS_BIT_SET(hadc->Instance->CR, ADC_CR_ADSTART) && \ HAL_IS_BIT_CLR(hadc->Instance->CR, ADC_CR_ADDIS) ) { /* Stop conversions on regular group */ hadc->Instance->CR |= ADC_CR_ADSTP; } } /* Wait for conversion effectively stopped */ /* Get timeout */ tickstart = HAL_GetTick(); while((hadc->Instance->CR & ADC_CR_ADSTART) != RESET) { /* Check for the Timeout */ if(ADC_STOP_CONVERSION_TIMEOUT != HAL_MAX_DELAY) { if((HAL_GetTick() - tickstart ) > ADC_STOP_CONVERSION_TIMEOUT) { /* Update ADC state machine to error */ hadc->State = HAL_ADC_STATE_ERROR; /* Set ADC error code to ADC IP internal error */ hadc->ErrorCode |= HAL_ADC_ERROR_INTERNAL; return HAL_ERROR; } } } } /* Return HAL status */ return HAL_OK; } /** * @brief DMA transfer complete callback. * @param hdma: pointer to DMA handle. * @retval None */ static void ADC_DMAConvCplt(DMA_HandleTypeDef *hdma) { ADC_HandleTypeDef* hadc = ( ADC_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent; /* Change ADC state */ hadc->State = HAL_ADC_STATE_EOC; HAL_ADC_ConvCpltCallback(hadc); } /** * @brief DMA half transfer complete callback. * @param hdma: pointer to DMA handle. * @retval None */ static void ADC_DMAHalfConvCplt(DMA_HandleTypeDef *hdma) { ADC_HandleTypeDef* hadc = ( ADC_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent; /* Conversion complete callback */ HAL_ADC_ConvHalfCpltCallback(hadc); } /** * @brief DMA error callback * @param hdma: pointer to DMA handle. * @retval None */ static void ADC_DMAError(DMA_HandleTypeDef *hdma) { ADC_HandleTypeDef* hadc = ( ADC_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent; hadc->State= HAL_ADC_STATE_ERROR; /* Set ADC error code to DMA error */ hadc->ErrorCode |= HAL_ADC_ERROR_DMA; HAL_ADC_ErrorCallback(hadc); } /** * @brief Delay micro seconds * @param microSecond : delay * @retval None */ static void ADC_DelayMicroSecond(uint32_t microSecond) { /* Compute number of CPU cycles to wait for */ __IO uint32_t waitLoopIndex = (microSecond * (SystemCoreClock / 1000000)); while(waitLoopIndex != 0) { waitLoopIndex--; } } /** * @} */ #endif /* HAL_ADC_MODULE_ENABLED */ /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/