| /** |
| ****************************************************************************** |
| * @file stm32l0xx_ll_adc.c |
| * @author MCD Application Team |
| * @brief ADC LL module driver |
| ****************************************************************************** |
| * @attention |
| * |
| * <h2><center>© Copyright(c) 2016 STMicroelectronics. |
| * All rights reserved.</center></h2> |
| * |
| * 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 "stm32l0xx_ll_adc.h" |
| #include "stm32l0xx_ll_bus.h" |
| |
| #ifdef USE_FULL_ASSERT |
| #include "stm32_assert.h" |
| #else |
| #define assert_param(expr) ((void)0U) |
| #endif |
| |
| /** @addtogroup STM32L0xx_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 peripheral 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 32MHz, HSI frequency 16MHz: ratio 2. */ |
| /* 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. */ |
| #define IS_LL_ADC_COMMON_CLOCK(__CLOCK__) \ |
| ( ((__CLOCK__) == LL_ADC_CLOCK_ASYNC_DIV1) \ |
| || ((__CLOCK__) == LL_ADC_CLOCK_ASYNC_DIV2) \ |
| || ((__CLOCK__) == LL_ADC_CLOCK_ASYNC_DIV4) \ |
| || ((__CLOCK__) == LL_ADC_CLOCK_ASYNC_DIV6) \ |
| || ((__CLOCK__) == LL_ADC_CLOCK_ASYNC_DIV8) \ |
| || ((__CLOCK__) == LL_ADC_CLOCK_ASYNC_DIV10) \ |
| || ((__CLOCK__) == LL_ADC_CLOCK_ASYNC_DIV12) \ |
| || ((__CLOCK__) == LL_ADC_CLOCK_ASYNC_DIV16) \ |
| || ((__CLOCK__) == LL_ADC_CLOCK_ASYNC_DIV32) \ |
| || ((__CLOCK__) == LL_ADC_CLOCK_ASYNC_DIV64) \ |
| || ((__CLOCK__) == LL_ADC_CLOCK_ASYNC_DIV128) \ |
| || ((__CLOCK__) == LL_ADC_CLOCK_ASYNC_DIV256) \ |
| ) |
| |
| #define IS_LL_ADC_CLOCK_FREQ_MODE(__CLOCK_FREQ_MODE__) \ |
| ( ((__CLOCK_FREQ_MODE__) == LL_ADC_CLOCK_FREQ_MODE_HIGH) \ |
| || ((__CLOCK_FREQ_MODE__) == LL_ADC_CLOCK_FREQ_MODE_LOW) \ |
| ) |
| |
| /* 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_SYNC_PCLK_DIV1) \ |
| || ((__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 */ |
| /* ADC group regular external trigger TIM2_CC3 available only on */ |
| /* STM32L0 devices categories: Cat.1, Cat.2, Cat.5 */ |
| #if defined (STM32L011xx) || defined (STM32L021xx) || \ |
| defined (STM32L031xx) || defined (STM32L041xx) || \ |
| defined (STM32L071xx) || defined (STM32L072xx) || defined (STM32L073xx) || \ |
| defined (STM32L081xx) || defined (STM32L082xx) || defined (STM32L083xx) |
| #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_TIM6_TRGO) \ |
| || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM21_CH2) \ |
| || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM2_TRGO) \ |
| || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM2_CH4) \ |
| || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM22_TRGO) \ |
| || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM2_CH3) \ |
| || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM3_TRGO) \ |
| || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_EXTI_LINE11) \ |
| ) |
| #else |
| #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_TIM6_TRGO) \ |
| || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM21_CH2) \ |
| || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM2_TRGO) \ |
| || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM2_CH4) \ |
| || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM22_TRGO) \ |
| || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_TIM3_TRGO) \ |
| || ((__REG_TRIG_SOURCE__) == LL_ADC_REG_TRIG_EXT_EXTI_LINE11) \ |
| ) |
| #endif |
| |
| #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_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_ADC1); |
| |
| /* Release reset of ADC clock (core clock) */ |
| LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_ADC1); |
| |
| return SUCCESS; |
| } |
| |
| /** |
| * @brief Initialize some features of ADC common parameters |
| * (all ADC instances belonging to the same ADC common instance) |
| * and multimode (for devices with several ADC instances available). |
| * @note The setting of ADC common parameters is conditioned to |
| * ADC instances state: |
| * All ADC instances belonging to the same ADC common instance |
| * must be disabled. |
| * @param ADCxy_COMMON ADC common instance |
| * (can be set directly from CMSIS definition or by using helper macro @ref __LL_ADC_COMMON_INSTANCE() ) |
| * @param ADC_CommonInitStruct Pointer to a @ref LL_ADC_CommonInitTypeDef structure |
| * @retval An ErrorStatus enumeration value: |
| * - SUCCESS: ADC common registers are initialized |
| * - ERROR: ADC common registers are not initialized |
| */ |
| ErrorStatus LL_ADC_CommonInit(ADC_Common_TypeDef *ADCxy_COMMON, LL_ADC_CommonInitTypeDef *ADC_CommonInitStruct) |
| { |
| ErrorStatus status = SUCCESS; |
| |
| /* Check the parameters */ |
| assert_param(IS_ADC_COMMON_INSTANCE(ADCxy_COMMON)); |
| assert_param(IS_LL_ADC_COMMON_CLOCK(ADC_CommonInitStruct->CommonClock)); |
| |
| /* Note: Hardware constraint (refer to description of functions */ |
| /* "LL_ADC_SetCommonXXX()": */ |
| /* On this STM32 serie, setting of these features is conditioned to */ |
| /* ADC state: */ |
| /* All ADC instances of the ADC common group must be disabled. */ |
| if(__LL_ADC_IS_ENABLED_ALL_COMMON_INSTANCE(ADCxy_COMMON) == 0U) |
| { |
| /* Configuration of ADC hierarchical scope: */ |
| /* - common to several ADC */ |
| /* (all ADC instances belonging to the same ADC common instance) */ |
| /* - Set ADC clock (conversion clock) */ |
| LL_ADC_SetCommonClock(ADCxy_COMMON, ADC_CommonInitStruct->CommonClock); |
| } |
| else |
| { |
| /* Initialization error: One or several ADC instances belonging to */ |
| /* the same ADC common instance are not disabled. */ |
| status = ERROR; |
| } |
| |
| return status; |
| } |
| |
| /** |
| * @brief Set each @ref LL_ADC_CommonInitTypeDef field to default value. |
| * @param ADC_CommonInitStruct Pointer to a @ref LL_ADC_CommonInitTypeDef structure |
| * whose fields will be set to default values. |
| * @retval None |
| */ |
| void LL_ADC_CommonStructInit(LL_ADC_CommonInitTypeDef *ADC_CommonInitStruct) |
| { |
| /* Set ADC_CommonInitStruct fields to default values */ |
| /* Set fields of ADC common */ |
| /* (all ADC instances belonging to the same ADC common instance) */ |
| ADC_CommonInitStruct->CommonClock = LL_ADC_CLOCK_ASYNC_DIV2; |
| |
| } |
| |
| /** |
| * @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. */ |
| CLEAR_BIT(ADCx->CR, ADC_CR_ADVREGEN); |
| |
| /* 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 |
| | ADC_CFGR2_TOVS | ADC_CFGR2_OVSS | ADC_CFGR2_OVSR |
| | ADC_CFGR2_OVSE | 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_VLCDEN) |
| 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_CHSEL18 | ADC_CHSELR_CHSEL17 |
| | 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 */ |
| |
| /* Reset register CALFACT */ |
| CLEAR_BIT(ADCx->CALFACT, ADC_CALFACT_CALFACT); |
| |
| } |
| 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)); |
| |
| /* ADC group regular continuous mode and discontinuous mode */ |
| /* can not be enabled simultenaeously */ |
| assert_param((ADC_REG_InitStruct->ContinuousMode == LL_ADC_REG_CONV_SINGLE) |
| || (ADC_REG_InitStruct->SequencerDiscont == LL_ADC_REG_SEQ_DISCONT_DISABLE)); |
| |
| /* 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****/ |
