/** ****************************************************************************** * @file stm32f0xx_ll_adc.c * @author MCD Application Team * @brief ADC LL module driver ****************************************************************************** * @attention * *

© Copyright (c) 2016 STMicroelectronics. * All rights reserved.

* * This software component is licensed by ST under BSD 3-Clause license, * the "License"; You may not use this file except in compliance with the * License. You may obtain a copy of the License at: * opensource.org/licenses/BSD-3-Clause * ****************************************************************************** */ #if defined(USE_FULL_LL_DRIVER) /* Includes ------------------------------------------------------------------*/ #include "stm32f0xx_ll_adc.h" #include "stm32f0xx_ll_bus.h" #ifdef USE_FULL_ASSERT #include "stm32_assert.h" #else #define assert_param(expr) ((void)0U) #endif /** @addtogroup STM32F0xx_LL_Driver * @{ */ #if defined (ADC1) /** @addtogroup ADC_LL ADC * @{ */ /* Private types -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private constants ---------------------------------------------------------*/ /** @addtogroup ADC_LL_Private_Constants * @{ */ /* Definitions of ADC hardware constraints delays */ /* Note: Only ADC IP HW delays are defined in ADC LL driver driver, */ /* not timeout values: */ /* Timeout values for ADC operations are dependent to device clock */ /* configuration (system clock versus ADC clock), */ /* and therefore must be defined in user application. */ /* Refer to @ref ADC_LL_EC_HW_DELAYS for description of ADC timeout */ /* values definition. */ /* Note: ADC timeout values are defined here in CPU cycles to be independent */ /* of device clock setting. */ /* In user application, ADC timeout values should be defined with */ /* temporal values, in function of device clock settings. */ /* Highest ratio CPU clock frequency vs ADC clock frequency: */ /* - ADC clock from synchronous clock with AHB prescaler 512, */ /* APB prescaler 16, ADC prescaler 4. */ /* - ADC clock from asynchronous clock (HSI) with prescaler 1, */ /* with highest ratio CPU clock frequency vs HSI clock frequency: */ /* CPU clock frequency max 48MHz, HSI frequency 14MHz: ratio 4. */ /* Unit: CPU cycles. */ #define ADC_CLOCK_RATIO_VS_CPU_HIGHEST ((uint32_t) 512U * 16U * 4U) #define ADC_TIMEOUT_DISABLE_CPU_CYCLES (ADC_CLOCK_RATIO_VS_CPU_HIGHEST * 1U) #define ADC_TIMEOUT_STOP_CONVERSION_CPU_CYCLES (ADC_CLOCK_RATIO_VS_CPU_HIGHEST * 1U) /** * @} */ /* Private macros ------------------------------------------------------------*/ /** @addtogroup ADC_LL_Private_Macros * @{ */ /* Check of parameters for configuration of ADC hierarchical scope: */ /* common to several ADC instances. */ /* Check of parameters for configuration of ADC hierarchical scope: */ /* ADC instance. */ #define IS_LL_ADC_CLOCK(__CLOCK__) \ ( ((__CLOCK__) == LL_ADC_CLOCK_SYNC_PCLK_DIV4) \ || ((__CLOCK__) == LL_ADC_CLOCK_SYNC_PCLK_DIV2) \ || ((__CLOCK__) == LL_ADC_CLOCK_ASYNC) \ ) #define IS_LL_ADC_RESOLUTION(__RESOLUTION__) \ ( ((__RESOLUTION__) == LL_ADC_RESOLUTION_12B) \ || ((__RESOLUTION__) == LL_ADC_RESOLUTION_10B) \ || ((__RESOLUTION__) == LL_ADC_RESOLUTION_8B) \ || ((__RESOLUTION__) == LL_ADC_RESOLUTION_6B) \ ) #define IS_LL_ADC_DATA_ALIGN(__DATA_ALIGN__) \ ( ((__DATA_ALIGN__) == LL_ADC_DATA_ALIGN_RIGHT) \ || ((__DATA_ALIGN__) == LL_ADC_DATA_ALIGN_LEFT) \ ) #define IS_LL_ADC_LOW_POWER(__LOW_POWER__) \ ( ((__LOW_POWER__) == LL_ADC_LP_MODE_NONE) \ || ((__LOW_POWER__) == LL_ADC_LP_AUTOWAIT) \ || ((__LOW_POWER__) == LL_ADC_LP_AUTOPOWEROFF) \ || ((__LOW_POWER__) == LL_ADC_LP_AUTOWAIT_AUTOPOWEROFF) \ ) /* Check of parameters for configuration of ADC hierarchical scope: */ /* ADC group regular */ #define IS_LL_ADC_REG_TRIG_SOURCE(__REG_TRIG_SOURCE__) \ ( ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_SOFTWARE) \ || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM1_TRGO) \ || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM1_CH4) \ || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM2_TRGO) \ || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM3_TRGO) \ || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM15_TRGO) \ ) #define IS_LL_ADC_REG_CONTINUOUS_MODE(__REG_CONTINUOUS_MODE__) \ ( ((__REG_CONTINUOUS_MODE__) == LL_ADC_REG_CONV_SINGLE) \ || ((__REG_CONTINUOUS_MODE__) == LL_ADC_REG_CONV_CONTINUOUS) \ ) #define IS_LL_ADC_REG_DMA_TRANSFER(__REG_DMA_TRANSFER__) \ ( ((__REG_DMA_TRANSFER__) == LL_ADC_REG_DMA_TRANSFER_NONE) \ || ((__REG_DMA_TRANSFER__) == LL_ADC_REG_DMA_TRANSFER_LIMITED) \ || ((__REG_DMA_TRANSFER__) == LL_ADC_REG_DMA_TRANSFER_UNLIMITED) \ ) #define IS_LL_ADC_REG_OVR_DATA_BEHAVIOR(__REG_OVR_DATA_BEHAVIOR__) \ ( ((__REG_OVR_DATA_BEHAVIOR__) == LL_ADC_REG_OVR_DATA_PRESERVED) \ || ((__REG_OVR_DATA_BEHAVIOR__) == LL_ADC_REG_OVR_DATA_OVERWRITTEN) \ ) #define IS_LL_ADC_REG_SEQ_SCAN_DISCONT_MODE(__REG_SEQ_DISCONT_MODE__) \ ( ((__REG_SEQ_DISCONT_MODE__) == LL_ADC_REG_SEQ_DISCONT_DISABLE) \ || ((__REG_SEQ_DISCONT_MODE__) == LL_ADC_REG_SEQ_DISCONT_1RANK) \ ) /** * @} */ /* Private function prototypes -----------------------------------------------*/ /* Exported functions --------------------------------------------------------*/ /** @addtogroup ADC_LL_Exported_Functions * @{ */ /** @addtogroup ADC_LL_EF_Init * @{ */ /** * @brief De-initialize registers of all ADC instances belonging to * the same ADC common instance to their default reset values. * @note This function is performing a hard reset, using high level * clock source RCC ADC reset. * @param ADCxy_COMMON ADC common instance * (can be set directly from CMSIS definition or by using helper macro @ref __LL_ADC_COMMON_INSTANCE() ) * @retval An ErrorStatus enumeration value: * - SUCCESS: ADC common registers are de-initialized * - ERROR: not applicable */ ErrorStatus LL_ADC_CommonDeInit(ADC_Common_TypeDef *ADCxy_COMMON) { /* Check the parameters */ assert_param(IS_ADC_COMMON_INSTANCE(ADCxy_COMMON)); /* Force reset of ADC clock (core clock) */ LL_APB1_GRP2_ForceReset(LL_APB1_GRP2_PERIPH_ADC1); /* Release reset of ADC clock (core clock) */ LL_APB1_GRP2_ReleaseReset(LL_APB1_GRP2_PERIPH_ADC1); return SUCCESS; } /** * @brief De-initialize registers of the selected ADC instance * to their default reset values. * @note To reset all ADC instances quickly (perform a hard reset), * use function @ref LL_ADC_CommonDeInit(). * @note If this functions returns error status, it means that ADC instance * is in an unknown state. * In this case, perform a hard reset using high level * clock source RCC ADC reset. * Refer to function @ref LL_ADC_CommonDeInit(). * @param ADCx ADC instance * @retval An ErrorStatus enumeration value: * - SUCCESS: ADC registers are de-initialized * - ERROR: ADC registers are not de-initialized */ ErrorStatus LL_ADC_DeInit(ADC_TypeDef *ADCx) { ErrorStatus status = SUCCESS; __IO uint32_t timeout_cpu_cycles = 0U; /* Check the parameters */ assert_param(IS_ADC_ALL_INSTANCE(ADCx)); /* Disable ADC instance if not already disabled. */ if(LL_ADC_IsEnabled(ADCx) == 1U) { /* Set ADC group regular trigger source to SW start to ensure to not */ /* have an external trigger event occurring during the conversion stop */ /* ADC disable process. */ LL_ADC_REG_SetTriggerSource(ADCx, LL_ADC_REG_TRIG_SOFTWARE); /* Stop potential ADC conversion on going on ADC group regular. */ if(LL_ADC_REG_IsConversionOngoing(ADCx) != 0U) { if(LL_ADC_REG_IsStopConversionOngoing(ADCx) == 0U) { LL_ADC_REG_StopConversion(ADCx); } } /* Wait for ADC conversions are effectively stopped */ timeout_cpu_cycles = ADC_TIMEOUT_STOP_CONVERSION_CPU_CYCLES; while (LL_ADC_REG_IsStopConversionOngoing(ADCx) == 1U) { if(timeout_cpu_cycles-- == 0U) { /* Time-out error */ status = ERROR; } } /* Disable the ADC instance */ LL_ADC_Disable(ADCx); /* Wait for ADC instance is effectively disabled */ timeout_cpu_cycles = ADC_TIMEOUT_DISABLE_CPU_CYCLES; while (LL_ADC_IsDisableOngoing(ADCx) == 1U) { if(timeout_cpu_cycles-- == 0U) { /* Time-out error */ status = ERROR; } } } /* Check whether ADC state is compliant with expected state */ if(READ_BIT(ADCx->CR, ( ADC_CR_ADSTP | ADC_CR_ADSTART | ADC_CR_ADDIS | ADC_CR_ADEN ) ) == 0U) { /* ========== Reset ADC registers ========== */ /* Reset register IER */ CLEAR_BIT(ADCx->IER, ( LL_ADC_IT_ADRDY | LL_ADC_IT_EOC | LL_ADC_IT_EOS | LL_ADC_IT_OVR | LL_ADC_IT_EOSMP | LL_ADC_IT_AWD1 ) ); /* Reset register ISR */ SET_BIT(ADCx->ISR, ( LL_ADC_FLAG_ADRDY | LL_ADC_FLAG_EOC | LL_ADC_FLAG_EOS | LL_ADC_FLAG_OVR | LL_ADC_FLAG_EOSMP | LL_ADC_FLAG_AWD1 ) ); /* Reset register CR */ /* Bits ADC_CR_ADCAL, ADC_CR_ADSTP, ADC_CR_ADSTART are in access mode */ /* "read-set": no direct reset applicable. */ /* No action on register CR */ /* Reset register CFGR1 */ CLEAR_BIT(ADCx->CFGR1, ( ADC_CFGR1_AWDCH | ADC_CFGR1_AWDEN | ADC_CFGR1_AWDSGL | ADC_CFGR1_DISCEN | ADC_CFGR1_AUTOFF | ADC_CFGR1_WAIT | 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 */ /* Note: Update of ADC clock mode is conditioned to ADC state disabled: */ /* already done above. */ CLEAR_BIT(ADCx->CFGR2, ADC_CFGR2_CKMODE); /* Reset register SMPR */ CLEAR_BIT(ADCx->SMPR, ADC_SMPR_SMP); /* Reset register TR */ MODIFY_REG(ADCx->TR, ADC_TR_HT | ADC_TR_LT, ADC_TR_HT); /* Reset register CHSELR */ #if defined(ADC_CCR_VBATEN) CLEAR_BIT(ADCx->CHSELR, ( ADC_CHSELR_CHSEL18 | ADC_CHSELR_CHSEL17 | ADC_CHSELR_CHSEL16 | ADC_CHSELR_CHSEL15 | ADC_CHSELR_CHSEL14 | ADC_CHSELR_CHSEL13 | ADC_CHSELR_CHSEL12 | ADC_CHSELR_CHSEL11 | ADC_CHSELR_CHSEL10 | ADC_CHSELR_CHSEL9 | ADC_CHSELR_CHSEL8 | ADC_CHSELR_CHSEL7 | ADC_CHSELR_CHSEL6 | ADC_CHSELR_CHSEL5 | ADC_CHSELR_CHSEL4 | ADC_CHSELR_CHSEL3 | ADC_CHSELR_CHSEL2 | ADC_CHSELR_CHSEL1 | ADC_CHSELR_CHSEL0 ) ); #else CLEAR_BIT(ADCx->CHSELR, ( ADC_CHSELR_CHSEL17 | ADC_CHSELR_CHSEL16 | ADC_CHSELR_CHSEL15 | ADC_CHSELR_CHSEL14 | ADC_CHSELR_CHSEL13 | ADC_CHSELR_CHSEL12 | ADC_CHSELR_CHSEL11 | ADC_CHSELR_CHSEL10 | ADC_CHSELR_CHSEL9 | ADC_CHSELR_CHSEL8 | ADC_CHSELR_CHSEL7 | ADC_CHSELR_CHSEL6 | ADC_CHSELR_CHSEL5 | ADC_CHSELR_CHSEL4 | ADC_CHSELR_CHSEL3 | ADC_CHSELR_CHSEL2 | ADC_CHSELR_CHSEL1 | ADC_CHSELR_CHSEL0 ) ); #endif /* Reset register DR */ /* bits in access mode read only, no direct reset applicable */ } else { /* ADC instance is in an unknown state */ /* Need to performing a hard reset of ADC instance, using high level */ /* clock source RCC ADC reset. */ /* Caution: On this STM32 serie, if several ADC instances are available */ /* on the selected device, RCC ADC reset will reset */ /* all ADC instances belonging to the common ADC instance. */ status = ERROR; } return status; } /** * @brief Initialize some features of ADC instance. * @note These parameters have an impact on ADC scope: ADC instance. * Refer to corresponding unitary functions into * @ref ADC_LL_EF_Configuration_ADC_Instance . * @note The setting of these parameters by function @ref LL_ADC_Init() * is conditioned to ADC state: * ADC instance must be disabled. * This condition is applied to all ADC features, for efficiency * and compatibility over all STM32 families. However, the different * features can be set under different ADC state conditions * (setting possible with ADC enabled without conversion on going, * ADC enabled with conversion on going, ...) * Each feature can be updated afterwards with a unitary function * and potentially with ADC in a different state than disabled, * refer to description of each function for setting * conditioned to ADC state. * @note After using this function, some other features must be configured * using LL unitary functions. * The minimum configuration remaining to be done is: * - Set ADC group regular sequencer: * map channel on rank corresponding to channel number. * Refer to function @ref LL_ADC_REG_SetSequencerChannels(); * - Set ADC channel sampling time * Refer to function LL_ADC_SetChannelSamplingTime(); * @param ADCx ADC instance * @param ADC_InitStruct Pointer to a @ref LL_ADC_REG_InitTypeDef structure * @retval An ErrorStatus enumeration value: * - SUCCESS: ADC registers are initialized * - ERROR: ADC registers are not initialized */ ErrorStatus LL_ADC_Init(ADC_TypeDef *ADCx, LL_ADC_InitTypeDef *ADC_InitStruct) { ErrorStatus status = SUCCESS; /* Check the parameters */ assert_param(IS_ADC_ALL_INSTANCE(ADCx)); assert_param(IS_LL_ADC_CLOCK(ADC_InitStruct->Clock)); assert_param(IS_LL_ADC_RESOLUTION(ADC_InitStruct->Resolution)); assert_param(IS_LL_ADC_DATA_ALIGN(ADC_InitStruct->DataAlignment)); assert_param(IS_LL_ADC_LOW_POWER(ADC_InitStruct->LowPowerMode)); /* Note: Hardware constraint (refer to description of this function): */ /* ADC instance must be disabled. */ if(LL_ADC_IsEnabled(ADCx) == 0U) { /* Configuration of ADC hierarchical scope: */ /* - ADC instance */ /* - Set ADC data resolution */ /* - Set ADC conversion data alignment */ /* - Set ADC low power mode */ MODIFY_REG(ADCx->CFGR1, ADC_CFGR1_RES | ADC_CFGR1_ALIGN | ADC_CFGR1_WAIT | ADC_CFGR1_AUTOFF , ADC_InitStruct->Resolution | ADC_InitStruct->DataAlignment | ADC_InitStruct->LowPowerMode ); MODIFY_REG(ADCx->CFGR2, ADC_CFGR2_CKMODE , ADC_InitStruct->Clock ); } else { /* Initialization error: ADC instance is not disabled. */ status = ERROR; } return status; } /** * @brief Set each @ref LL_ADC_InitTypeDef field to default value. * @param ADC_InitStruct Pointer to a @ref LL_ADC_InitTypeDef structure * whose fields will be set to default values. * @retval None */ void LL_ADC_StructInit(LL_ADC_InitTypeDef *ADC_InitStruct) { /* Set ADC_InitStruct fields to default values */ /* Set fields of ADC instance */ ADC_InitStruct->Clock = LL_ADC_CLOCK_SYNC_PCLK_DIV2; ADC_InitStruct->Resolution = LL_ADC_RESOLUTION_12B; ADC_InitStruct->DataAlignment = LL_ADC_DATA_ALIGN_RIGHT; ADC_InitStruct->LowPowerMode = LL_ADC_LP_MODE_NONE; } /** * @brief Initialize some features of ADC group regular. * @note These parameters have an impact on ADC scope: ADC group regular. * Refer to corresponding unitary functions into * @ref ADC_LL_EF_Configuration_ADC_Group_Regular * (functions with prefix "REG"). * @note The setting of these parameters by function @ref LL_ADC_Init() * is conditioned to ADC state: * ADC instance must be disabled. * This condition is applied to all ADC features, for efficiency * and compatibility over all STM32 families. However, the different * features can be set under different ADC state conditions * (setting possible with ADC enabled without conversion on going, * ADC enabled with conversion on going, ...) * Each feature can be updated afterwards with a unitary function * and potentially with ADC in a different state than disabled, * refer to description of each function for setting * conditioned to ADC state. * @note After using this function, other features must be configured * using LL unitary functions. * The minimum configuration remaining to be done is: * - Set ADC group regular sequencer: * map channel on rank corresponding to channel number. * Refer to function @ref LL_ADC_REG_SetSequencerChannels(); * - Set ADC channel sampling time * Refer to function LL_ADC_SetChannelSamplingTime(); * @param ADCx ADC instance * @param ADC_REG_InitStruct Pointer to a @ref LL_ADC_REG_InitTypeDef structure * @retval An ErrorStatus enumeration value: * - SUCCESS: ADC registers are initialized * - ERROR: ADC registers are not initialized */ ErrorStatus LL_ADC_REG_Init(ADC_TypeDef *ADCx, LL_ADC_REG_InitTypeDef *ADC_REG_InitStruct) { ErrorStatus status = SUCCESS; /* Check the parameters */ assert_param(IS_ADC_ALL_INSTANCE(ADCx)); assert_param(IS_LL_ADC_REG_TRIG_SOURCE(ADC_REG_InitStruct->TriggerSource)); assert_param(IS_LL_ADC_REG_SEQ_SCAN_DISCONT_MODE(ADC_REG_InitStruct->SequencerDiscont)); assert_param(IS_LL_ADC_REG_CONTINUOUS_MODE(ADC_REG_InitStruct->ContinuousMode)); assert_param(IS_LL_ADC_REG_DMA_TRANSFER(ADC_REG_InitStruct->DMATransfer)); assert_param(IS_LL_ADC_REG_OVR_DATA_BEHAVIOR(ADC_REG_InitStruct->Overrun)); /* Note: Hardware constraint (refer to description of this function): */ /* ADC instance must be disabled. */ if(LL_ADC_IsEnabled(ADCx) == 0U) { /* Configuration of ADC hierarchical scope: */ /* - ADC group regular */ /* - Set ADC group regular trigger source */ /* - Set ADC group regular sequencer discontinuous mode */ /* - Set ADC group regular continuous mode */ /* - Set ADC group regular conversion data transfer: no transfer or */ /* transfer by DMA, and DMA requests mode */ /* - Set ADC group regular overrun behavior */ /* Note: On this STM32 serie, ADC trigger edge is set to value 0x0 by */ /* setting of trigger source to SW start. */ MODIFY_REG(ADCx->CFGR1, ADC_CFGR1_EXTSEL | ADC_CFGR1_EXTEN | ADC_CFGR1_DISCEN | ADC_CFGR1_CONT | ADC_CFGR1_DMAEN | ADC_CFGR1_DMACFG | ADC_CFGR1_OVRMOD , ADC_REG_InitStruct->TriggerSource | ADC_REG_InitStruct->SequencerDiscont | ADC_REG_InitStruct->ContinuousMode | ADC_REG_InitStruct->DMATransfer | ADC_REG_InitStruct->Overrun ); } else { /* Initialization error: ADC instance is not disabled. */ status = ERROR; } return status; } /** * @brief Set each @ref LL_ADC_REG_InitTypeDef field to default value. * @param ADC_REG_InitStruct Pointer to a @ref LL_ADC_REG_InitTypeDef structure * whose fields will be set to default values. * @retval None */ void LL_ADC_REG_StructInit(LL_ADC_REG_InitTypeDef *ADC_REG_InitStruct) { /* Set ADC_REG_InitStruct fields to default values */ /* Set fields of ADC group regular */ /* Note: On this STM32 serie, ADC trigger edge is set to value 0x0 by */ /* setting of trigger source to SW start. */ ADC_REG_InitStruct->TriggerSource = LL_ADC_REG_TRIG_SOFTWARE; ADC_REG_InitStruct->SequencerDiscont = LL_ADC_REG_SEQ_DISCONT_DISABLE; ADC_REG_InitStruct->ContinuousMode = LL_ADC_REG_CONV_SINGLE; ADC_REG_InitStruct->DMATransfer = LL_ADC_REG_DMA_TRANSFER_NONE; ADC_REG_InitStruct->Overrun = LL_ADC_REG_OVR_DATA_OVERWRITTEN; } /** * @} */ /** * @} */ /** * @} */ #endif /* ADC1 */ /** * @} */ #endif /* USE_FULL_LL_DRIVER */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/