/** | |
****************************************************************************** | |
* @file stm32l0xx_ll_adc.c | |
* @author MCD Application Team | |
* @brief ADC LL module driver | |
****************************************************************************** | |
* @attention | |
* | |
* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> | |
* | |
* Redistribution and use in source and binary forms, with or without modification, | |
* are permitted provided that the following conditions are met: | |
* 1. Redistributions of source code must retain the above copyright notice, | |
* this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright notice, | |
* this list of conditions and the following disclaimer in the documentation | |
* and/or other materials provided with the distribution. | |
* 3. Neither the name of STMicroelectronics nor the names of its contributors | |
* may be used to endorse or promote products derived from this software | |
* without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
* | |
****************************************************************************** | |
*/ | |
#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 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 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 */ | |
#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) \ | |
) | |
#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 | |
); | |
} | |
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****/ |