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/**
******************************************************************************
* @file stm32l0xx_ll_adc.c
* @author MCD Application Team
* @brief ADC LL module driver
******************************************************************************
* @attention
*
* Copyright (c) 2016 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
#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 series, 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 series, 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 series, 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 series, 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 */