/** | |
****************************************************************************** | |
* @file stm32l0xx_hal_adc.c | |
* @author MCD Application Team | |
* @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 | |
* group, using 3 possible modes: polling, interruption or DMA. | |
* + Control functions | |
* ++ Channels configuration on regular group | |
* ++ Analog Watchdog configuration | |
* + State functions | |
* ++ ADC state machine management | |
* ++ Interrupts and flags management | |
* Other functions (extended functions) are available in file | |
* "stm32l0xx_hal_adc_ex.c". | |
* | |
@verbatim | |
============================================================================== | |
##### ADC peripheral features ##### | |
============================================================================== | |
[..] | |
(+) 12-bit, 10-bit, 8-bit or 6-bit configurable resolution. | |
(+) Interrupt generation at the end of regular conversion and in case of | |
analog watchdog or overrun events. | |
(+) Single and continuous conversion modes. | |
(+) Scan mode for conversion of several channels sequentially. | |
(+) Data alignment with in-built data coherency. | |
(+) Programmable sampling time (common for all channels) | |
(+) External trigger (timer or EXTI) with configurable polarity | |
(+) DMA request generation for transfer of conversions data of regular group. | |
(+) ADC calibration | |
(+) ADC conversion of regular group. | |
(+) ADC supply requirements: 1.62 V to 3.6 V. | |
(+) ADC input range: from Vref- (connected to Vssa) to Vref+ (connected to | |
Vdda or to an external voltage reference). | |
##### How to use this driver ##### | |
============================================================================== | |
[..] | |
*** Configuration of top level parameters related to ADC *** | |
============================================================ | |
[..] | |
(#) Enable the ADC interface | |
(++) As prerequisite, ADC clock must be configured at RCC top level. | |
Caution: On STM32L0, ADC clock frequency max is 16MHz (refer | |
to device datasheet). | |
Therefore, ADC clock prescaler must be configured in | |
function of ADC clock source frequency to remain below | |
this maximum frequency. | |
(++) Two clock settings are mandatory: | |
(+++) ADC clock (core clock, also possibly conversion clock). | |
(+++) ADC clock (conversions clock). | |
Two possible clock sources: synchronous clock derived from APB clock | |
or asynchronous clock derived from ADC dedicated HSI RC oscillator | |
16MHz. | |
If asynchronous clock is selected, parameter "HSIState" must be set either: | |
- to "...HSIState = RCC_HSI_ON" to maintain the HSI16 oscillator | |
always enabled: can be used to supply the main system clock. | |
(+++) Example: | |
Into HAL_ADC_MspInit() (recommended code location) or with | |
other device clock parameters configuration: | |
(+++) __HAL_RCC_ADC1_CLK_ENABLE(); (mandatory) | |
HSI enable (optional: if asynchronous clock selected) | |
(+++) RCC_OscInitTypeDef RCC_OscInitStructure; | |
(+++) RCC_OscInitStructure.OscillatorType = RCC_OSCILLATORTYPE_HSI; | |
(+++) RCC_OscInitStructure.HSI16CalibrationValue = RCC_HSICALIBRATION_DEFAULT; | |
(+++) RCC_OscInitStructure.HSIState = RCC_HSI_ON; | |
(+++) RCC_OscInitStructure.PLL... (optional if used for system clock) | |
(+++) HAL_RCC_OscConfig(&RCC_OscInitStructure); | |
(++) ADC clock source and clock prescaler are configured at ADC level with | |
parameter "ClockPrescaler" using function HAL_ADC_Init(). | |
(#) ADC pins configuration | |
(++) Enable the clock for the ADC GPIOs | |
using macro __HAL_RCC_GPIOx_CLK_ENABLE() | |
(++) Configure these ADC pins in analog mode | |
using function HAL_GPIO_Init() | |
(#) Optionally, in case of usage of ADC with interruptions: | |
(++) Configure the NVIC for ADC | |
using function HAL_NVIC_EnableIRQ(ADCx_IRQn) | |
(++) Insert the ADC interruption handler function HAL_ADC_IRQHandler() | |
into the function of corresponding ADC interruption vector | |
ADCx_IRQHandler(). | |
(#) Optionally, in case of usage of DMA: | |
(++) Configure the DMA (DMA channel, mode normal or circular, ...) | |
using function HAL_DMA_Init(). | |
(++) Configure the NVIC for DMA | |
using function HAL_NVIC_EnableIRQ(DMAx_Channelx_IRQn) | |
(++) Insert the ADC interruption handler function HAL_ADC_IRQHandler() | |
into the function of corresponding DMA interruption vector | |
DMAx_Channelx_IRQHandler(). | |
*** Configuration of ADC, group regular, channels parameters *** | |
================================================================ | |
[..] | |
(#) Configure the ADC parameters (resolution, data alignment, ...) | |
and regular group parameters (conversion trigger, sequencer, ...) | |
using function HAL_ADC_Init(). | |
(#) Configure the channels for regular group parameters (channel number, | |
channel rank into sequencer, ..., into regular group) | |
using function HAL_ADC_ConfigChannel(). | |
(#) Optionally, configure the analog watchdog parameters (channels | |
monitored, thresholds, ...) | |
using function HAL_ADC_AnalogWDGConfig(). | |
(#) When device is in mode low-power (low-power run, low-power sleep or stop mode), | |
function "HAL_ADCEx_EnableVREFINT()" must be called before function HAL_ADC_Init(). | |
In case of internal temperature sensor to be measured: | |
function "HAL_ADCEx_EnableVREFINTTempSensor()" must be called similarilly | |
*** Execution of ADC conversions *** | |
==================================== | |
[..] | |
(#) Optionally, perform an automatic ADC calibration to improve the | |
conversion accuracy | |
using function HAL_ADCEx_Calibration_Start(). | |
(#) ADC driver can be used among three modes: polling, interruption, | |
transfer by DMA. | |
(++) ADC conversion by polling: | |
(+++) Activate the ADC peripheral and start conversions | |
using function HAL_ADC_Start() | |
(+++) Wait for ADC conversion completion | |
using function HAL_ADC_PollForConversion() | |
(+++) Retrieve conversion results | |
using function HAL_ADC_GetValue() | |
(+++) Stop conversion and disable the ADC peripheral | |
using function HAL_ADC_Stop() | |
(++) ADC conversion by interruption: | |
(+++) Activate the ADC peripheral and start conversions | |
using function HAL_ADC_Start_IT() | |
(+++) Wait for ADC conversion completion by call of function | |
HAL_ADC_ConvCpltCallback() | |
(this function must be implemented in user program) | |
(+++) Retrieve conversion results | |
using function HAL_ADC_GetValue() | |
(+++) Stop conversion and disable the ADC peripheral | |
using function HAL_ADC_Stop_IT() | |
(++) ADC conversion with transfer by DMA: | |
(+++) Activate the ADC peripheral and start conversions | |
using function HAL_ADC_Start_DMA() | |
(+++) Wait for ADC conversion completion by call of function | |
HAL_ADC_ConvCpltCallback() or HAL_ADC_ConvHalfCpltCallback() | |
(these functions must be implemented in user program) | |
(+++) Conversion results are automatically transferred by DMA into | |
destination variable address. | |
(+++) Stop conversion and disable the ADC peripheral | |
using function HAL_ADC_Stop_DMA() | |
[..] | |
(@) Callback functions must be implemented in user program: | |
(+@) HAL_ADC_ErrorCallback() | |
(+@) HAL_ADC_LevelOutOfWindowCallback() (callback of analog watchdog) | |
(+@) HAL_ADC_ConvCpltCallback() | |
(+@) HAL_ADC_ConvHalfCpltCallback | |
*** Deinitialization of ADC *** | |
============================================================ | |
[..] | |
(#) Disable the ADC interface | |
(++) ADC clock can be hard reset and disabled at RCC top level. | |
(++) Hard reset of ADC peripherals | |
using macro __ADCx_FORCE_RESET(), __ADCx_RELEASE_RESET(). | |
(++) ADC clock disable | |
using the equivalent macro/functions as configuration step. | |
(+++) Example: | |
Into HAL_ADC_MspDeInit() (recommended code location) or with | |
other device clock parameters configuration: | |
(+++) RCC_OscInitStructure.OscillatorType = RCC_OSCILLATORTYPE_HSI; | |
(+++) RCC_OscInitStructure.HSIState = RCC_HSI_OFF; (if not used for system clock) | |
(+++) HAL_RCC_OscConfig(&RCC_OscInitStructure); | |
(#) ADC pins configuration | |
(++) Disable the clock for the ADC GPIOs | |
using macro __HAL_RCC_GPIOx_CLK_DISABLE() | |
(#) Optionally, in case of usage of ADC with interruptions: | |
(++) Disable the NVIC for ADC | |
using function HAL_NVIC_EnableIRQ(ADCx_IRQn) | |
(#) Optionally, in case of usage of DMA: | |
(++) Deinitialize the DMA | |
using function HAL_DMA_Init(). | |
(++) Disable the NVIC for DMA | |
using function HAL_NVIC_EnableIRQ(DMAx_Channelx_IRQn) | |
[..] | |
@endverbatim | |
****************************************************************************** | |
* @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. | |
* | |
****************************************************************************** | |
*/ | |
/* Includes ------------------------------------------------------------------*/ | |
#include "stm32l0xx_hal.h" | |
/** @addtogroup STM32L0xx_HAL_Driver | |
* @{ | |
*/ | |
/** @defgroup ADC ADC | |
* @brief ADC HAL module driver | |
* @{ | |
*/ | |
#ifdef HAL_ADC_MODULE_ENABLED | |
/* Private typedef -----------------------------------------------------------*/ | |
/* Private define ------------------------------------------------------------*/ | |
/** @defgroup ADC_Private_Constants ADC Private Constants | |
* @{ | |
*/ | |
/* Delay for ADC stabilization time. */ | |
/* Maximum delay is 1us (refer to device datasheet, parameter tSTART). */ | |
/* Unit: us */ | |
#define ADC_STAB_DELAY_US ((uint32_t) 1U) | |
/* 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) 10U) | |
/** | |
* @} | |
*/ | |
/* Private macro -------------------------------------------------------------*/ | |
/* Private variables ---------------------------------------------------------*/ | |
/* Private function prototypes -----------------------------------------------*/ | |
/** @defgroup ADC_Private_Functions ADC Private Functions | |
* @{ | |
*/ | |
static HAL_StatusTypeDef ADC_Enable(ADC_HandleTypeDef* hadc); | |
static HAL_StatusTypeDef ADC_Disable(ADC_HandleTypeDef* hadc); | |
static HAL_StatusTypeDef ADC_ConversionStop(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 void ADC_DelayMicroSecond(uint32_t microSecond); | |
/** | |
* @} | |
*/ | |
/* Exported functions ---------------------------------------------------------*/ | |
/** @defgroup ADC_Exported_Functions ADC Exported Functions | |
* @{ | |
*/ | |
/** @defgroup ADC_Exported_Functions_Group1 Initialization and de-initialization functions | |
* @brief ADC 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 Initialize the ADC peripheral and regular group according to | |
* parameters specified in structure "ADC_InitTypeDef". | |
* @note As prerequisite, ADC clock must be configured at RCC top level | |
* depending on possible clock sources: APB clock of HSI clock. | |
* See commented example code below that can be copied and uncommented | |
* into HAL_ADC_MspInit(). | |
* @note Possibility to update parameters on the fly: | |
* This function initializes the ADC MSP (HAL_ADC_MspInit()) only when | |
* coming from ADC state reset. Following calls to this function can | |
* be used to reconfigure some parameters of ADC_InitTypeDef | |
* structure on the fly, without modifying MSP configuration. If ADC | |
* MSP has to be modified again, HAL_ADC_DeInit() must be called | |
* before HAL_ADC_Init(). | |
* The setting of these parameters is conditioned to ADC state. | |
* For parameters constraints, see comments of structure | |
* "ADC_InitTypeDef". | |
* @note This function configures the ADC within 2 scopes: scope of entire | |
* ADC and scope of regular group. For parameters details, see comments | |
* of structure "ADC_InitTypeDef". | |
* @note When device is in mode low-power (low-power run, low-power sleep or stop mode), | |
* function "HAL_ADCEx_EnableVREFINT()" must be called before function HAL_ADC_Init() | |
* (in case of previous ADC operations: function HAL_ADC_DeInit() must be called first). | |
* In case of internal temperature sensor to be measured: | |
* function "HAL_ADCEx_EnableVREFINTTempSensor()" must be called similarilly. | |
* @param hadc: ADC handle | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_ADC_Init(ADC_HandleTypeDef* hadc) | |
{ | |
/* 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_DATA_ALIGN(hadc->Init.DataAlign)); | |
assert_param(IS_ADC_SCAN_MODE(hadc->Init.ScanConvMode)); | |
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_EXTTRIG(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_ADC_SAMPLE_TIME(hadc->Init.SamplingTime)); | |
assert_param(IS_FUNCTIONAL_STATE(hadc->Init.OversamplingMode)); | |
/* As prerequisite, into HAL_ADC_MspInit(), ADC clock must be configured */ | |
/* at RCC top level depending on both possible clock sources: */ | |
/* APB clock or HSI clock. */ | |
/* Refer to header of this file for more details on clock enabling procedure*/ | |
/* Actions performed only if ADC is coming from state reset: */ | |
/* - Initialization of ADC MSP */ | |
/* - ADC voltage regulator enable */ | |
if(hadc->State == HAL_ADC_STATE_RESET) | |
{ | |
/* Initialize ADC error code */ | |
ADC_CLEAR_ERRORCODE(hadc); | |
/* Allocate lock resource and initialize it */ | |
hadc->Lock = HAL_UNLOCKED; | |
/* 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 on regular group (ADC can be */ | |
/* enabled anyway, in case of call of this function to update a parameter */ | |
/* on the fly). */ | |
if (HAL_IS_BIT_SET(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL) || | |
(ADC_IS_CONVERSION_ONGOING_REGULAR(hadc) != RESET) ) | |
{ | |
/* Update ADC state machine to error */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL); | |
/* Process unlocked */ | |
__HAL_UNLOCK(hadc); | |
return HAL_ERROR; | |
} | |
/* Set ADC state */ | |
ADC_STATE_CLR_SET(hadc->State, | |
HAL_ADC_STATE_REG_BUSY, | |
HAL_ADC_STATE_BUSY_INTERNAL); | |
/* Parameters update conditioned to ADC state: */ | |
/* Parameters that can be updated only when ADC is disabled: */ | |
/* - ADC clock mode */ | |
/* - ADC clock prescaler */ | |
/* - ADC Resolution */ | |
if (ADC_IS_ENABLE(hadc) == RESET) | |
{ | |
/* Some parameters of this register are not reset, since they are set */ | |
/* by other functions and must be kept in case of usage of this */ | |
/* function on the fly (update of a parameter of ADC_InitTypeDef */ | |
/* without needing to reconfigure all other ADC groups/channels */ | |
/* parameters): */ | |
/* - internal measurement paths: Vbat, temperature sensor, Vref */ | |
/* (set into HAL_ADC_ConfigChannel() ) */ | |
/* Configuration of ADC clock: clock source PCLK or asynchronous with | |
selectable prescaler */ | |
__HAL_ADC_CLOCK_PRESCALER(hadc); | |
/* Configuration of ADC: */ | |
/* - Resolution */ | |
hadc->Instance->CFGR1 &= ~( ADC_CFGR1_RES); | |
hadc->Instance->CFGR1 |= hadc->Init.Resolution; | |
} | |
/* 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)) | |
{ | |
/* 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_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.DataAlign | | |
ADC_SCANDIR(hadc->Init.ScanConvMode) | | |
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)); | |
/* Enable external trigger if trigger selection is different of software */ | |
/* start. */ | |
/* Note: This configuration keeps the hardware feature of parameter */ | |
/* ExternalTrigConvEdge "trigger edge none" equivalent to */ | |
/* software start. */ | |
if (hadc->Init.ExternalTrigConv != ADC_SOFTWARE_START) | |
{ | |
hadc->Instance->CFGR1 |= hadc->Init.ExternalTrigConv | | |
hadc->Init.ExternalTrigConvEdge; | |
} | |
/* Enable discontinuous mode only if continuous mode is disabled */ | |
if (hadc->Init.DiscontinuousConvMode == ENABLE) | |
{ | |
if (hadc->Init.ContinuousConvMode == DISABLE) | |
{ | |
/* Enable the selected ADC group regular discontinuous mode */ | |
hadc->Instance->CFGR1 |= (ADC_CFGR1_DISCEN); | |
} | |
else | |
{ | |
/* ADC regular group discontinuous was intended to be enabled, */ | |
/* but ADC regular group modes continuous and sequencer discontinuous */ | |
/* cannot be enabled simultaneously. */ | |
/* Update ADC state machine to error */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG); | |
/* Set ADC error code to ADC IP internal error */ | |
SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_INTERNAL); | |
} | |
} | |
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 | |
{ | |
if(HAL_IS_BIT_SET(hadc->Instance->CFGR2, ADC_CFGR2_OVSE)) | |
{ | |
/* Disable OverSampling mode if needed */ | |
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; | |
/* Clear ADC error code */ | |
ADC_CLEAR_ERRORCODE(hadc); | |
/* Set the ADC state */ | |
ADC_STATE_CLR_SET(hadc->State, | |
HAL_ADC_STATE_BUSY_INTERNAL, | |
HAL_ADC_STATE_READY); | |
/* Return function status */ | |
return HAL_OK; | |
} | |
/** | |
* @brief Deinitialize the ADC peripheral registers to their default reset | |
* values, with deinitialization of the ADC MSP. | |
* @note For devices with several ADCs: reset of ADC common registers is done | |
* only if all ADCs sharing the same common group are disabled. | |
* If this is not the case, reset of these common parameters reset is | |
* bypassed without error reporting: it can be the intended behavior in | |
* case of reset of a single ADC while the other ADCs sharing the same | |
* common group is still running. | |
* @param hadc: ADC handle | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_ADC_DeInit(ADC_HandleTypeDef* hadc) | |
{ | |
HAL_StatusTypeDef tmp_hal_status = HAL_OK; | |
/* Check ADC handle */ | |
if(hadc == NULL) | |
{ | |
return HAL_ERROR; | |
} | |
/* Check the parameters */ | |
assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); | |
/* Set ADC state */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_BUSY_INTERNAL); | |
/* Stop potential conversion on going, on regular group */ | |
tmp_hal_status = ADC_ConversionStop(hadc); | |
/* Disable ADC peripheral if conversions are effectively stopped */ | |
if (tmp_hal_status == HAL_OK) | |
{ | |
/* Disable the ADC peripheral */ | |
tmp_hal_status = ADC_Disable(hadc); | |
/* Check if ADC is effectively disabled */ | |
if (tmp_hal_status != HAL_ERROR) | |
{ | |
/* Change ADC state */ | |
hadc->State = HAL_ADC_STATE_READY; | |
} | |
} | |
/* Configuration of ADC parameters if previous preliminary actions are */ | |
/* correctly completed. */ | |
if (tmp_hal_status != HAL_ERROR) | |
{ | |
/* ========== 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); | |
/* ========== Hard reset ADC peripheral ========== */ | |
/* Performs a global reset of the entire ADC peripheral: ADC state is */ | |
/* forced to a similar state after device power-on. */ | |
/* If needed, copy-paste and uncomment the following reset code into */ | |
/* function "void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)": */ | |
/* */ | |
/* __HAL_RCC_ADC1_FORCE_RESET() */ | |
/* __HAL_RCC_ADC1_RELEASE_RESET() */ | |
/* DeInit the low level hardware */ | |
HAL_ADC_MspDeInit(hadc); | |
/* Set ADC error code to none */ | |
ADC_CLEAR_ERRORCODE(hadc); | |
/* Set ADC state */ | |
hadc->State = HAL_ADC_STATE_RESET; | |
} | |
/* Process unlocked */ | |
__HAL_UNLOCK(hadc); | |
/* Return function status */ | |
return tmp_hal_status; | |
} | |
/** | |
* @brief Initialize the ADC MSP. | |
* @param hadc: ADC handle | |
* @retval None | |
*/ | |
__weak void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc) | |
{ | |
/* Prevent unused argument(s) compilation warning */ | |
UNUSED(hadc); | |
/* NOTE : This function should not be modified. When the callback is needed, | |
function HAL_ADC_MspInit must be implemented in the user file. | |
*/ | |
} | |
/** | |
* @brief DeInitialize the ADC MSP. | |
* @param hadc: ADC handle | |
* @retval None | |
*/ | |
__weak void HAL_ADC_MspDeInit(ADC_HandleTypeDef* hadc) | |
{ | |
/* Prevent unused argument(s) compilation warning */ | |
UNUSED(hadc); | |
/* NOTE : This function should not be modified. When the callback is needed, | |
function HAL_ADC_MspDeInit must be implemented in the user file. | |
*/ | |
} | |
/** | |
* @} | |
*/ | |
/** @defgroup ADC_Exported_Functions_Group2 ADC Input and Output operation functions | |
* @brief ADC IO operation functions | |
* | |
@verbatim | |
=============================================================================== | |
##### IO operation functions ##### | |
=============================================================================== | |
[..] This section provides functions allowing to: | |
(+) Start conversion of regular group. | |
(+) Stop conversion of regular group. | |
(+) Poll for conversion complete on regular group. | |
(+) Poll for conversion event. | |
(+) Get result of regular channel conversion. | |
(+) Start conversion of regular group and enable interruptions. | |
(+) Stop conversion of regular group and disable interruptions. | |
(+) Handle ADC interrupt request | |
(+) Start conversion of regular group and enable DMA transfer. | |
(+) Stop conversion of regular group and disable ADC DMA transfer. | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Enable ADC, start conversion of regular group. | |
* @note Interruptions enabled in this function: None. | |
* @param hadc: ADC handle | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_ADC_Start(ADC_HandleTypeDef* hadc) | |
{ | |
HAL_StatusTypeDef tmp_hal_status = 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_REGULAR(hadc) == RESET) | |
{ | |
/* Process locked */ | |
__HAL_LOCK(hadc); | |
/* 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) | |
{ | |
tmp_hal_status = ADC_Enable(hadc); | |
} | |
/* Start conversion if ADC is effectively enabled */ | |
if (tmp_hal_status == HAL_OK) | |
{ | |
/* Set ADC state */ | |
/* - Clear state bitfield related to regular group conversion results */ | |
/* - Set state bitfield related to regular operation */ | |
ADC_STATE_CLR_SET(hadc->State, | |
HAL_ADC_STATE_READY | HAL_ADC_STATE_REG_EOC | HAL_ADC_STATE_REG_OVR | HAL_ADC_STATE_REG_EOSMP, | |
HAL_ADC_STATE_REG_BUSY); | |
/* Reset ADC all error code fields */ | |
ADC_CLEAR_ERRORCODE(hadc); | |
/* Process unlocked */ | |
/* Unlock before starting ADC conversions: in case of potential */ | |
/* interruption, to let the process to ADC IRQ Handler. */ | |
__HAL_UNLOCK(hadc); | |
/* Clear regular group conversion flag and overrun flag */ | |
/* (To ensure of no unknown state from potential previous ADC */ | |
/* operations) */ | |
__HAL_ADC_CLEAR_FLAG(hadc, (ADC_FLAG_EOC | ADC_FLAG_EOS | ADC_FLAG_OVR)); | |
/* Enable conversion of regular group. */ | |
/* If software start has been selected, conversion starts immediately. */ | |
/* If external trigger has been selected, conversion will start at next */ | |
/* trigger event. */ | |
hadc->Instance->CR |= ADC_CR_ADSTART; | |
} | |
} | |
else | |
{ | |
tmp_hal_status = HAL_BUSY; | |
} | |
/* Return function status */ | |
return tmp_hal_status; | |
} | |
/** | |
* @brief Stop ADC conversion of regular group (and injected channels in | |
* case of auto_injection mode), disable ADC peripheral. | |
* @param hadc: ADC handle | |
* @retval HAL status. | |
*/ | |
HAL_StatusTypeDef HAL_ADC_Stop(ADC_HandleTypeDef* hadc) | |
{ | |
HAL_StatusTypeDef tmp_hal_status = HAL_OK; | |
/* Check the parameters */ | |
assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); | |
/* Process locked */ | |
__HAL_LOCK(hadc); | |
/* 1. Stop potential conversion on going, on ADC group regular */ | |
tmp_hal_status = ADC_ConversionStop(hadc); | |
/* Disable ADC peripheral if conversions are effectively stopped */ | |
if (tmp_hal_status == HAL_OK) | |
{ | |
/* 2. Disable the ADC peripheral */ | |
tmp_hal_status = ADC_Disable(hadc); | |
/* Check if ADC is effectively disabled */ | |
if (tmp_hal_status == HAL_OK) | |
{ | |
/* Set ADC state */ | |
ADC_STATE_CLR_SET(hadc->State, | |
HAL_ADC_STATE_REG_BUSY, | |
HAL_ADC_STATE_READY); | |
} | |
} | |
/* Process unlocked */ | |
__HAL_UNLOCK(hadc); | |
/* Return function status */ | |
return tmp_hal_status; | |
} | |
/** | |
* @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 (ADC init | |
* parameter "EOCSelection" set to ADC_EOC_SEQ_CONV). | |
* @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 = 0x00; | |
/* Check the parameters */ | |
assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); | |
/* If end of conversion selected to end of sequence conversions */ | |
if (hadc->Init.EOCSelection == ADC_EOC_SEQ_CONV) | |
{ | |
tmp_Flag_EOC = ADC_FLAG_EOS; | |
} | |
/* If end of conversion selected to end of unitary 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 */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG); | |
/* Process unlocked */ | |
__HAL_UNLOCK(hadc); | |
return HAL_ERROR; | |
} | |
else | |
{ | |
tmp_Flag_EOC = (ADC_FLAG_EOC | ADC_FLAG_EOS); | |
} | |
} | |
/* Get tick count */ | |
tickstart = HAL_GetTick(); | |
/* Wait until End of unitary conversion or sequence conversions 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 == 0U) || ((HAL_GetTick()-tickstart) > Timeout)) | |
{ | |
/* Update ADC state machine to timeout */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_TIMEOUT); | |
/* Process unlocked */ | |
__HAL_UNLOCK(hadc); | |
return HAL_TIMEOUT; | |
} | |
} | |
} | |
/* Update ADC state machine */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_REG_EOC); | |
/* Determine whether any further conversion upcoming on group regular */ | |
/* by external trigger, continuous mode or scan sequence on going. */ | |
if(ADC_IS_SOFTWARE_START_REGULAR(hadc) && | |
(hadc->Init.ContinuousConvMode == DISABLE) ) | |
{ | |
/* If End of Sequence is reached, disable interrupts */ | |
if( __HAL_ADC_GET_FLAG(hadc, ADC_FLAG_EOS) ) | |
{ | |
/* Allowed to modify bits ADC_IT_EOC/ADC_IT_EOS only if bit */ | |
/* ADSTART==0 (no conversion on going) */ | |
if (ADC_IS_CONVERSION_ONGOING_REGULAR(hadc) == RESET) | |
{ | |
/* Disable ADC end of single conversion interrupt on group regular */ | |
/* Note: Overrun interrupt was enabled with EOC interrupt in */ | |
/* HAL_Start_IT(), but is not disabled here because can be used */ | |
/* by overrun IRQ process below. */ | |
__HAL_ADC_DISABLE_IT(hadc, ADC_IT_EOC | ADC_IT_EOS); | |
/* Set ADC state */ | |
ADC_STATE_CLR_SET(hadc->State, | |
HAL_ADC_STATE_REG_BUSY, | |
HAL_ADC_STATE_READY); | |
} | |
else | |
{ | |
/* Change ADC state to error state */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG); | |
/* Set ADC error code to ADC IP internal error */ | |
SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_INTERNAL); | |
} | |
} | |
} | |
/* 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)); | |
} | |
/* Return function status */ | |
return HAL_OK; | |
} | |
/** | |
* @brief Poll for ADC 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. | |
* @note The relevant flag is cleared if found to be set, except for ADC_FLAG_OVR. | |
* Indeed, the latter is reset only if hadc->Init.Overrun field is set | |
* to ADC_OVR_DATA_OVERWRITTEN. Otherwise, data register may be potentially overwritten | |
* by a new converted data as soon as OVR is cleared. | |
* To reset OVR flag once the preserved data is retrieved, the user can resort | |
* to macro __HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_OVR); | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_ADC_PollForEvent(ADC_HandleTypeDef* hadc, uint32_t EventType, uint32_t Timeout) | |
{ | |
uint32_t tickstart = 0U; | |
/* Check the parameters */ | |
assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); | |
assert_param(IS_ADC_EVENT_TYPE(EventType)); | |
/* Get tick count */ | |
tickstart = HAL_GetTick(); | |
/* Check selected event flag */ | |
while(__HAL_ADC_GET_FLAG(hadc, EventType) == RESET) | |
{ | |
/* Check if timeout is disabled (set to infinite wait) */ | |
if(Timeout != HAL_MAX_DELAY) | |
{ | |
if((Timeout == 0U) ||((HAL_GetTick() - tickstart ) > Timeout)) | |
{ | |
/* Update ADC state machine to timeout */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_TIMEOUT); | |
/* Process unlocked */ | |
__HAL_UNLOCK(hadc); | |
return HAL_TIMEOUT; | |
} | |
} | |
} | |
switch(EventType) | |
{ | |
/* Analog watchdog (level out of window) event */ | |
case ADC_AWD_EVENT: | |
/* Set ADC state */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_AWD1); | |
/* Clear ADC analog watchdog flag */ | |
__HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_AWD); | |
break; | |
/* Overrun event */ | |
default: /* Case ADC_OVR_EVENT */ | |
/* If overrun is set to overwrite previous data, overrun event is not */ | |
/* considered as an error. */ | |
/* (cf ref manual "Managing conversions without using the DMA and without */ | |
/* overrun ") */ | |
if (hadc->Init.Overrun == ADC_OVR_DATA_PRESERVED) | |
{ | |
/* Set ADC state */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_REG_OVR); | |
/* Set ADC error code to overrun */ | |
SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_OVR); | |
} | |
/* Clear ADC Overrun flag */ | |
__HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_OVR); | |
break; | |
} | |
/* Return function status */ | |
return HAL_OK; | |
} | |
/** | |
* @brief Enable ADC, start conversion of regular group with interruption. | |
* @note Interruptions enabled in this function according to initialization | |
* setting : EOC (end of conversion), EOS (end of sequence), | |
* OVR overrun. | |
* Each of these interruptions has its dedicated callback function. | |
* @note To guarantee a proper reset of all interruptions once all the needed | |
* conversions are obtained, HAL_ADC_Stop_IT() must be called to ensure | |
* a correct stop of the IT-based conversions. | |
* @note By default, HAL_ADC_Start_IT() doesn't enable the End Of Sampling | |
* interruption. If required (e.g. in case of oversampling with trigger | |
* mode), the user must: | |
* 1. first clear the EOSMP flag if set with macro __HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_EOSMP) | |
* 2. then enable the EOSMP interrupt with macro __HAL_ADC_ENABLE_IT(hadc, ADC_IT_EOSMP) | |
* before calling HAL_ADC_Start_IT(). | |
* @param hadc: ADC handle | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_ADC_Start_IT(ADC_HandleTypeDef* hadc) | |
{ | |
HAL_StatusTypeDef tmp_hal_status = 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_REGULAR(hadc) == RESET) | |
{ | |
/* Process locked */ | |
__HAL_LOCK(hadc); | |
/* 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) | |
{ | |
tmp_hal_status = ADC_Enable(hadc); | |
} | |
/* Start conversion if ADC is effectively enabled */ | |
if (tmp_hal_status == HAL_OK) | |
{ | |
/* Set ADC state */ | |
/* - Clear state bitfield related to regular group conversion results */ | |
/* - Set state bitfield related to regular operation */ | |
ADC_STATE_CLR_SET(hadc->State, | |
HAL_ADC_STATE_READY | HAL_ADC_STATE_REG_EOC | HAL_ADC_STATE_REG_OVR | HAL_ADC_STATE_REG_EOSMP, | |
HAL_ADC_STATE_REG_BUSY); | |
/* Reset ADC all error code fields */ | |
ADC_CLEAR_ERRORCODE(hadc); | |
/* Process unlocked */ | |
/* Unlock before starting ADC conversions: in case of potential */ | |
/* interruption, to let the process to ADC IRQ Handler. */ | |
__HAL_UNLOCK(hadc); | |
/* Clear regular group conversion flag and overrun flag */ | |
/* (To ensure of no unknown state from potential previous ADC */ | |
/* operations) */ | |
__HAL_ADC_CLEAR_FLAG(hadc, (ADC_FLAG_EOC | ADC_FLAG_EOS | ADC_FLAG_OVR)); | |
/* Enable ADC end of conversion interrupt */ | |
/* Enable ADC overrun 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 | ADC_IT_OVR)); | |
break; | |
/* case ADC_EOC_SINGLE_CONV */ | |
default: | |
__HAL_ADC_ENABLE_IT(hadc, (ADC_IT_EOC | ADC_IT_EOS | ADC_IT_OVR)); | |
break; | |
} | |
/* Enable conversion of regular group. */ | |
/* If software start has been selected, conversion starts immediately. */ | |
/* If external trigger has been selected, conversion will start at next */ | |
/* trigger event. */ | |
hadc->Instance->CR |= ADC_CR_ADSTART; | |
} | |
} | |
else | |
{ | |
tmp_hal_status = HAL_BUSY; | |
} | |
/* Return function status */ | |
return tmp_hal_status; | |
} | |
/** | |
* @brief Stop ADC conversion of regular group (and injected group in | |
* case of auto_injection mode), disable interrution of | |
* end-of-conversion, disable ADC peripheral. | |
* @param hadc: ADC handle | |
* @retval HAL status. | |
*/ | |
HAL_StatusTypeDef HAL_ADC_Stop_IT(ADC_HandleTypeDef* hadc) | |
{ | |
HAL_StatusTypeDef tmp_hal_status = HAL_OK; | |
/* Check the parameters */ | |
assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); | |
/* Process locked */ | |
__HAL_LOCK(hadc); | |
/* 1. Stop potential conversion on going, on ADC group regular */ | |
tmp_hal_status = ADC_ConversionStop(hadc); | |
/* Disable ADC peripheral if conversions are effectively stopped */ | |
if (tmp_hal_status == HAL_OK) | |
{ | |
/* Disable ADC end of conversion interrupt for regular group */ | |
/* Disable ADC overrun interrupt */ | |
__HAL_ADC_DISABLE_IT(hadc, (ADC_IT_EOC | ADC_IT_EOS | ADC_IT_OVR)); | |
/* 2. Disable the ADC peripheral */ | |
tmp_hal_status = ADC_Disable(hadc); | |
/* Check if ADC is effectively disabled */ | |
if (tmp_hal_status == HAL_OK) | |
{ | |
/* Set ADC state */ | |
ADC_STATE_CLR_SET(hadc->State, | |
HAL_ADC_STATE_REG_BUSY, | |
HAL_ADC_STATE_READY); | |
} | |
} | |
/* Process unlocked */ | |
__HAL_UNLOCK(hadc); | |
/* Return function status */ | |
return tmp_hal_status; | |
} | |
/** | |
* @brief Enable ADC, start conversion of regular group and transfer result through DMA. | |
* @note Interruptions enabled in this function: | |
* overrun (if applicable), DMA half transfer, DMA transfer complete. | |
* Each of these interruptions has its dedicated callback function. | |
* @param hadc: ADC handle | |
* @param pData: Destination Buffer address. | |
* @param Length: Length of data to be transferred from ADC peripheral to memory (in bytes) | |
* @retval HAL status. | |
*/ | |
HAL_StatusTypeDef HAL_ADC_Start_DMA(ADC_HandleTypeDef* hadc, uint32_t* pData, uint32_t Length) | |
{ | |
HAL_StatusTypeDef tmp_hal_status = 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_REGULAR(hadc) == RESET) | |
{ | |
/* Process locked */ | |
__HAL_LOCK(hadc); | |
/* 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) | |
{ | |
tmp_hal_status = ADC_Enable(hadc); | |
} | |
/* Start conversion if ADC is effectively enabled */ | |
if (tmp_hal_status == HAL_OK) | |
{ | |
/* Set ADC state */ | |
/* - Clear state bitfield related to regular group conversion results */ | |
/* - Set state bitfield related to regular operation */ | |
ADC_STATE_CLR_SET(hadc->State, | |
HAL_ADC_STATE_READY | HAL_ADC_STATE_REG_EOC | HAL_ADC_STATE_REG_OVR | HAL_ADC_STATE_REG_EOSMP, | |
HAL_ADC_STATE_REG_BUSY); | |
/* Reset ADC all error code fields */ | |
ADC_CLEAR_ERRORCODE(hadc); | |
/* Process unlocked */ | |
/* Unlock before starting ADC conversions: in case of potential */ | |
/* interruption, to let the process to ADC IRQ Handler. */ | |
__HAL_UNLOCK(hadc); | |
/* 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): */ | |
/* Clear regular group conversion flag and overrun flag */ | |
/* (To ensure of no unknown state from potential previous ADC */ | |
/* operations) */ | |
__HAL_ADC_CLEAR_FLAG(hadc, (ADC_FLAG_EOC | ADC_FLAG_EOS | ADC_FLAG_OVR)); | |
/* Enable ADC overrun interrupt */ | |
__HAL_ADC_ENABLE_IT(hadc, ADC_IT_OVR); | |
/* Enable ADC DMA mode */ | |
hadc->Instance->CFGR1 |= ADC_CFGR1_DMAEN; | |
/* Start the DMA channel */ | |
HAL_DMA_Start_IT(hadc->DMA_Handle, (uint32_t)&hadc->Instance->DR, (uint32_t)pData, Length); | |
/* Enable conversion of regular group. */ | |
/* If software start has been selected, conversion starts immediately. */ | |
/* If external trigger has been selected, conversion will start at next */ | |
/* trigger event. */ | |
hadc->Instance->CR |= ADC_CR_ADSTART; | |
} | |
} | |
else | |
{ | |
tmp_hal_status = HAL_BUSY; | |
} | |
/* Return function status */ | |
return tmp_hal_status; | |
} | |
/** | |
* @brief Stop ADC conversion of regular group (and injected group in | |
* case of auto_injection mode), disable ADC DMA transfer, disable | |
* ADC peripheral. | |
* Each of these interruptions has its dedicated callback function. | |
* @param hadc: ADC handle | |
* @retval HAL status. | |
*/ | |
HAL_StatusTypeDef HAL_ADC_Stop_DMA(ADC_HandleTypeDef* hadc) | |
{ | |
HAL_StatusTypeDef tmp_hal_status = HAL_OK; | |
/* Check the parameters */ | |
assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); | |
/* Process locked */ | |
__HAL_LOCK(hadc); | |
/* 1. Stop potential ADC group regular conversion on going */ | |
tmp_hal_status = ADC_ConversionStop(hadc); | |
/* Disable ADC peripheral if conversions are effectively stopped */ | |
if (tmp_hal_status == HAL_OK) | |
{ | |
/* Disable ADC DMA (ADC DMA configuration ADC_CFGR_DMACFG is kept) */ | |
CLEAR_BIT(hadc->Instance->CFGR1, ADC_CFGR1_DMAEN); | |
/* Disable the DMA channel (in case of DMA in circular mode or stop */ | |
/* while DMA transfer is on going) */ | |
tmp_hal_status = HAL_DMA_Abort(hadc->DMA_Handle); | |
/* Check if DMA channel effectively disabled */ | |
if (tmp_hal_status != HAL_OK) | |
{ | |
/* Update ADC state machine to error */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_DMA); | |
} | |
/* Disable ADC overrun interrupt */ | |
__HAL_ADC_DISABLE_IT(hadc, ADC_IT_OVR); | |
/* 2. Disable the ADC peripheral */ | |
/* Update "tmp_hal_status" only if DMA channel disabling passed, to keep */ | |
/* in memory a potential failing status. */ | |
if (tmp_hal_status == HAL_OK) | |
{ | |
tmp_hal_status = ADC_Disable(hadc); | |
} | |
else | |
{ | |
ADC_Disable(hadc); | |
} | |
/* Check if ADC is effectively disabled */ | |
if (tmp_hal_status == HAL_OK) | |
{ | |
/* Set ADC state */ | |
ADC_STATE_CLR_SET(hadc->State, | |
HAL_ADC_STATE_REG_BUSY, | |
HAL_ADC_STATE_READY); | |
} | |
} | |
/* Process unlocked */ | |
__HAL_UNLOCK(hadc); | |
/* Return function status */ | |
return tmp_hal_status; | |
} | |
/** | |
* @brief Get ADC regular group conversion result. | |
* @note Reading register DR automatically clears ADC flag EOC | |
* (ADC group regular end of unitary conversion). | |
* @note This function does not clear ADC flag EOS | |
* (ADC group regular end of sequence conversion). | |
* Occurrence of flag EOS rising: | |
* - If sequencer is composed of 1 rank, flag EOS is equivalent | |
* to flag EOC. | |
* - If sequencer is composed of several ranks, during the scan | |
* sequence flag EOC only is raised, at the end of the scan sequence | |
* both flags EOC and EOS are raised. | |
* To clear this flag, either use function: | |
* in programming model IT: @ref HAL_ADC_IRQHandler(), in programming | |
* model polling: @ref HAL_ADC_PollForConversion() | |
* or @ref __HAL_ADC_CLEAR_FLAG(&hadc, ADC_FLAG_EOS). | |
* @param hadc: ADC handle | |
* @retval ADC group regular conversion data | |
*/ | |
uint32_t HAL_ADC_GetValue(ADC_HandleTypeDef* hadc) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); | |
/* Note: EOC flag is not cleared here by software because automatically */ | |
/* cleared by hardware when reading register DR. */ | |
/* Return ADC converted value */ | |
return hadc->Instance->DR; | |
} | |
/** | |
* @brief Handle ADC interrupt request. | |
* @param hadc: ADC handle | |
* @retval None | |
*/ | |
void HAL_ADC_IRQHandler(ADC_HandleTypeDef* hadc) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); | |
assert_param(IS_FUNCTIONAL_STATE(hadc->Init.ContinuousConvMode)); | |
assert_param(IS_ADC_EOC_SELECTION(hadc->Init.EOCSelection)); | |
/* ========== Check End of Conversion flag for regular group ========== */ | |
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)) ) | |
{ | |
/* Update state machine on conversion status if not in error state */ | |
if (HAL_IS_BIT_CLR(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL)) | |
{ | |
/* Set ADC state */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_REG_EOC); | |
} | |
/* Determine whether any further conversion upcoming on group regular */ | |
/* by external trigger, continuous mode or scan sequence on going. */ | |
if(ADC_IS_SOFTWARE_START_REGULAR(hadc) && | |
(hadc->Init.ContinuousConvMode == DISABLE) ) | |
{ | |
/* If End of Sequence is reached, disable interrupts */ | |
if( __HAL_ADC_GET_FLAG(hadc, ADC_FLAG_EOS) ) | |
{ | |
/* Allowed to modify bits ADC_IT_EOC/ADC_IT_EOS only if bit */ | |
/* ADSTART==0 (no conversion on going) */ | |
if (ADC_IS_CONVERSION_ONGOING_REGULAR(hadc) == RESET) | |
{ | |
/* Disable ADC end of single conversion interrupt on group regular */ | |
/* Note: Overrun interrupt was enabled with EOC interrupt in */ | |
/* HAL_Start_IT(), but is not disabled here because can be used */ | |
/* by overrun IRQ process below. */ | |
__HAL_ADC_DISABLE_IT(hadc, ADC_IT_EOC | ADC_IT_EOS); | |
/* Set ADC state */ | |
ADC_STATE_CLR_SET(hadc->State, | |
HAL_ADC_STATE_REG_BUSY, | |
HAL_ADC_STATE_READY); | |
} | |
else | |
{ | |
/* Change ADC state to error state */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG); | |
/* Set ADC error code to ADC IP internal error */ | |
SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_INTERNAL); | |
} | |
} | |
} | |
/* Conversion complete callback */ | |
/* Note: into callback, to determine if conversion has been triggered */ | |
/* from EOC or EOS, possibility to use: */ | |
/* " if( __HAL_ADC_GET_FLAG(&hadc, ADC_FLAG_EOS)) " */ | |
HAL_ADC_ConvCpltCallback(hadc); | |
/* Clear regular group conversion flag */ | |
/* Note: in case of overrun set to ADC_OVR_DATA_PRESERVED, end of */ | |
/* conversion flags clear induces the release of the preserved data.*/ | |
/* Therefore, if the preserved data value is needed, it must be */ | |
/* read preliminarily into HAL_ADC_ConvCpltCallback(). */ | |
/* Note: Management of low power auto-wait enabled: flags must be cleared */ | |
/* by user when fetching ADC conversion data. */ | |
/* This case is managed in IRQ handler, but this low-power mode */ | |
/* should not be used with programming model IT or DMA. */ | |
/* Refer to comment of parameter "LowPowerAutoWait". */ | |
if (hadc->Init.LowPowerAutoWait != ENABLE) | |
{ | |
__HAL_ADC_CLEAR_FLAG(hadc, (ADC_FLAG_EOC | ADC_FLAG_EOS)); | |
} | |
} | |
/* ========== Check analog watchdog 1 flag ========== */ | |
if(__HAL_ADC_GET_FLAG(hadc, ADC_FLAG_AWD) && __HAL_ADC_GET_IT_SOURCE(hadc, ADC_IT_AWD)) | |
{ | |
/* Set ADC state */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_AWD1); | |
/* Level out of window 1 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)) | |
{ | |
/* If overrun is set to overwrite previous data (default setting), */ | |
/* overrun event is not considered as an error. */ | |
/* (cf ref manual "Managing conversions without using the DMA and without */ | |
/* overrun ") */ | |
/* Exception for usage with DMA overrun event always considered as an */ | |
/* error. */ | |
if ((hadc->Init.Overrun == ADC_OVR_DATA_PRESERVED) || | |
HAL_IS_BIT_SET(hadc->Instance->CFGR1, ADC_CFGR1_DMAEN) ) | |
{ | |
/* Set ADC error code to overrun */ | |
SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_OVR); | |
/* Clear ADC overrun flag */ | |
__HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_OVR); | |
/* Error callback */ | |
HAL_ADC_ErrorCallback(hadc); | |
} | |
/* Clear the Overrun flag */ | |
__HAL_ADC_CLEAR_FLAG(hadc, ADC_FLAG_OVR); | |
} | |
} | |
/** | |
* @brief Conversion complete callback in non-blocking mode. | |
* @param hadc: ADC handle | |
* @retval None | |
*/ | |
__weak void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc) | |
{ | |
/* Prevent unused argument(s) compilation warning */ | |
UNUSED(hadc); | |
/* NOTE : This function should not be modified. When the callback is needed, | |
function HAL_ADC_ConvCpltCallback must be implemented in the user file. | |
*/ | |
} | |
/** | |
* @brief Conversion DMA half-transfer callback in non-blocking mode. | |
* @param hadc: ADC handle | |
* @retval None | |
*/ | |
__weak void HAL_ADC_ConvHalfCpltCallback(ADC_HandleTypeDef* hadc) | |
{ | |
/* Prevent unused argument(s) compilation warning */ | |
UNUSED(hadc); | |
/* NOTE : This function should not be modified. When the callback is needed, | |
function HAL_ADC_ConvHalfCpltCallback must be implemented in the user file. | |
*/ | |
} | |
/** | |
* @brief Analog watchdog 1 callback in non-blocking mode. | |
* @param hadc: ADC handle | |
* @retval None | |
*/ | |
__weak void HAL_ADC_LevelOutOfWindowCallback(ADC_HandleTypeDef* hadc) | |
{ | |
/* Prevent unused argument(s) compilation warning */ | |
UNUSED(hadc); | |
/* NOTE : This function should not be modified. When the callback is needed, | |
function HAL_ADC_LevelOutOfWindowCallback must be implemented in the user file. | |
*/ | |
} | |
/** | |
* @brief ADC error callback in non-blocking mode | |
* (ADC conversion with interruption or transfer by DMA). | |
* @note In case of error due to overrun when using ADC with DMA transfer | |
* (HAL ADC handle paramater "ErrorCode" to state "HAL_ADC_ERROR_OVR"): | |
* - Reinitialize the DMA using function "HAL_ADC_Stop_DMA()". | |
* - If needed, restart a new ADC conversion using function | |
* "HAL_ADC_Start_DMA()" | |
* (this function is also clearing overrun flag) | |
* @param hadc: ADC handle | |
* @retval None | |
*/ | |
__weak void HAL_ADC_ErrorCallback(ADC_HandleTypeDef *hadc) | |
{ | |
/* Prevent unused argument(s) compilation warning */ | |
UNUSED(hadc); | |
/* NOTE : This function should not be modified. When the callback is needed, | |
function HAL_ADC_ErrorCallback must be implemented in the user file. | |
*/ | |
} | |
/** | |
* @} | |
*/ | |
/** @defgroup ADC_Exported_Functions_Group3 Peripheral Control functions | |
* @brief Peripheral Control functions | |
* | |
@verbatim | |
=============================================================================== | |
##### Peripheral Control functions ##### | |
=============================================================================== | |
[..] This section provides functions allowing to: | |
(+) Configure channels on regular group | |
(+) Configure the analog watchdog | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Configure a channel to be assigned to ADC group regular. | |
* @note In case of usage of internal measurement channels: | |
* VrefInt/Vlcd(STM32L0x3xx only)/TempSensor. | |
* Sampling time constraints must be respected (sampling time can be | |
* adjusted in function of ADC clock frequency and sampling time | |
* setting). | |
* Refer to device datasheet for timings values, parameters TS_vrefint, | |
* TS_vlcd (STM32L0x3xx only), TS_temp (values rough order: 5us to 17us). | |
* These internal paths can be be disabled using function | |
* HAL_ADC_DeInit(). | |
* @note Possibility to update parameters on the fly: | |
* This function initializes channel into ADC group regular, | |
* following calls to this function can be used to reconfigure | |
* some parameters of structure "ADC_ChannelConfTypeDef" on the fly, | |
* without resetting the ADC. | |
* The setting of these parameters is conditioned to ADC state: | |
* Refer to comments of structure "ADC_ChannelConfTypeDef". | |
* @param hadc: ADC handle | |
* @param sConfig: Structure of ADC channel assigned to ADC group regular. | |
* @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)); | |
assert_param(IS_ADC_RANK(sConfig->Rank)); | |
/* 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 on regular group: */ | |
/* - Channel number */ | |
/* - Management of internal measurement channels: Vbat/VrefInt/TempSensor */ | |
if (ADC_IS_CONVERSION_ONGOING_REGULAR(hadc) != RESET) | |
{ | |
/* Update ADC state machine to error */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG); | |
/* Process unlocked */ | |
__HAL_UNLOCK(hadc); | |
return HAL_ERROR; | |
} | |
if (sConfig->Rank != ADC_RANK_NONE) | |
{ | |
/* Enable selected channels */ | |
hadc->Instance->CHSELR |= (uint32_t)(sConfig->Channel & ADC_CHANNEL_MASK); | |
/* Management of internal measurement channels: Vlcd (STM32L0x3xx only)/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 defined (STM32L053xx) || defined (STM32L063xx) || defined (STM32L073xx) || defined (STM32L083xx) | |
/* 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; | |
} | |
#endif | |
} | |
else | |
{ | |
/* Regular sequence configuration */ | |
/* Reset the channel selection register from the selected channel */ | |
hadc->Instance->CHSELR &= ~((uint32_t)(sConfig->Channel & ADC_CHANNEL_MASK)); | |
/* Management of internal measurement channels: VrefInt/TempSensor/Vbat */ | |
/* internal measurement paths disable: If internal channel selected, */ | |
/* disable dedicated internal buffers and path. */ | |
if (((sConfig->Channel & ADC_CHANNEL_MASK) & ADC_CHANNEL_TEMPSENSOR ) == (ADC_CHANNEL_TEMPSENSOR & ADC_CHANNEL_MASK)) | |
{ | |
ADC->CCR &= ~ADC_CCR_TSEN; | |
} | |
/* 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 defined (STM32L053xx) || defined (STM32L063xx) || defined (STM32L073xx) || defined (STM32L083xx) | |
/* 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; | |
} | |
#endif | |
} | |
/* Process unlocked */ | |
__HAL_UNLOCK(hadc); | |
/* Return function status */ | |
return HAL_OK; | |
} | |
/** | |
* @brief Configure the analog watchdog. | |
* @note Possibility to update parameters on the fly: | |
* This function initializes the selected analog watchdog, successive | |
* calls to this function can be used to reconfigure some parameters | |
* of structure "ADC_AnalogWDGConfTypeDef" on the fly, without resetting | |
* the ADC. | |
* The setting of these parameters is conditioned to ADC state. | |
* For parameters constraints, see comments of structure | |
* "ADC_AnalogWDGConfTypeDef". | |
* @note Analog watchdog thresholds can be modified while ADC conversion | |
* is on going. | |
* In this case, some constraints must be taken into account: | |
* the programmed threshold values are effective from the next | |
* ADC EOC (end of unitary conversion). | |
* Considering that registers write delay may happen due to | |
* bus activity, this might cause an uncertainty on the | |
* effective timing of the new programmed threshold values. | |
* @param hadc: ADC handle | |
* @param AnalogWDGConfig: Structure of ADC analog watchdog configuration | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_ADC_AnalogWDGConfig(ADC_HandleTypeDef* hadc, ADC_AnalogWDGConfTypeDef* AnalogWDGConfig) | |
{ | |
HAL_StatusTypeDef tmp_hal_status = HAL_OK; | |
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_FUNCTIONAL_STATE(AnalogWDGConfig->ITMode)); | |
if(AnalogWDGConfig->WatchdogMode == ADC_ANALOGWATCHDOG_SINGLE_REG) | |
{ | |
assert_param(IS_ADC_CHANNEL(AnalogWDGConfig->Channel)); | |
} | |
/* Verify if threshold is within the selected ADC resolution */ | |
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 on regular group: */ | |
/* - Analog watchdog channels */ | |
/* - Analog watchdog thresholds */ | |
if (ADC_IS_CONVERSION_ONGOING_REGULAR(hadc) == RESET) | |
{ | |
/* 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; | |
} | |
/* If a conversion is on going on regular group, no update could be done */ | |
/* on neither of the AWD configuration structure parameters. */ | |
else | |
{ | |
/* Update ADC state machine to error */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG); | |
tmp_hal_status = HAL_ERROR; | |
} | |
/* Process unlocked */ | |
__HAL_UNLOCK(hadc); | |
/* Return function status */ | |
return tmp_hal_status; | |
} | |
/** | |
* @} | |
*/ | |
/** @defgroup ADC_Exported_Functions_Group4 Peripheral State functions | |
* @brief ADC Peripheral State functions | |
* | |
@verbatim | |
=============================================================================== | |
##### Peripheral state and errors functions ##### | |
=============================================================================== | |
[..] | |
This subsection provides functions to get in run-time the status of the | |
peripheral. | |
(+) Check the ADC state | |
(+) Check the ADC error code | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Return the ADC handle state. | |
* @note ADC state machine is managed by bitfields, ADC status must be | |
* compared with states bits. | |
* For example: | |
* " if (HAL_IS_BIT_SET(HAL_ADC_GetState(hadc1), HAL_ADC_STATE_REG_BUSY)) " | |
* " if (HAL_IS_BIT_SET(HAL_ADC_GetState(hadc1), HAL_ADC_STATE_AWD1) ) " | |
* @param hadc: ADC handle | |
* @retval ADC handle state (bitfield on 32 bits) | |
*/ | |
uint32_t HAL_ADC_GetState(ADC_HandleTypeDef* hadc) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); | |
/* Return ADC handle state */ | |
return hadc->State; | |
} | |
/** | |
* @brief Return the ADC error code. | |
* @param hadc: ADC handle | |
* @retval ADC error code (bitfield on 32 bits) | |
*/ | |
uint32_t HAL_ADC_GetError(ADC_HandleTypeDef *hadc) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); | |
return hadc->ErrorCode; | |
} | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/** @defgroup ADC_Private_Functions ADC Private Functions | |
* @{ | |
*/ | |
/** | |
* @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 = 0U; | |
/* 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 */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL); | |
/* Set ADC error code to ADC IP internal error */ | |
SET_BIT(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); | |
/* Get tick count */ | |
tickstart = HAL_GetTick(); | |
/* Wait for ADC effectively enabled */ | |
while(__HAL_ADC_GET_FLAG(hadc, ADC_FLAG_RDY) == RESET) | |
{ | |
if((HAL_GetTick() - tickstart) > ADC_ENABLE_TIMEOUT) | |
{ | |
/* Update ADC state machine to error */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL); | |
/* Set ADC error code to ADC IP internal error */ | |
SET_BIT(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. | |
* @param hadc: ADC handle | |
* @retval HAL status. | |
*/ | |
static HAL_StatusTypeDef ADC_Disable(ADC_HandleTypeDef* hadc) | |
{ | |
uint32_t tickstart = 0U; | |
/* Verification if ADC is not already disabled: */ | |
/* Note: 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 */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL); | |
/* Set ADC error code to ADC IP internal error */ | |
SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_INTERNAL); | |
return HAL_ERROR; | |
} | |
/* Wait for ADC effectively disabled */ | |
/* Get tick count */ | |
tickstart = HAL_GetTick(); | |
while(HAL_IS_BIT_SET(hadc->Instance->CR, ADC_CR_ADEN)) | |
{ | |
if((HAL_GetTick() - tickstart) > ADC_DISABLE_TIMEOUT) | |
{ | |
/* Update ADC state machine to error */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL); | |
/* Set ADC error code to ADC IP internal error */ | |
SET_BIT(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 | |
* @retval HAL status. | |
*/ | |
static HAL_StatusTypeDef ADC_ConversionStop(ADC_HandleTypeDef* hadc) | |
{ | |
uint32_t tickstart = 0U; | |
/* Check the parameters */ | |
assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance)); | |
/* Verification if ADC is not already stopped on regular group to bypass */ | |
/* this function if not needed. */ | |
if (ADC_IS_CONVERSION_ONGOING_REGULAR(hadc)) | |
{ | |
/* Stop potential conversion on going on 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 tick count */ | |
tickstart = HAL_GetTick(); | |
while((hadc->Instance->CR & ADC_CR_ADSTART) != RESET) | |
{ | |
if((HAL_GetTick() - tickstart) > ADC_STOP_CONVERSION_TIMEOUT) | |
{ | |
/* Update ADC state machine to error */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL); | |
/* Set ADC error code to ADC IP internal error */ | |
SET_BIT(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) | |
{ | |
/* Retrieve ADC handle corresponding to current DMA handle */ | |
ADC_HandleTypeDef* hadc = ( ADC_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent; | |
/* Update state machine on conversion status if not in error state */ | |
if (HAL_IS_BIT_CLR(hadc->State, HAL_ADC_STATE_ERROR_INTERNAL | HAL_ADC_STATE_ERROR_DMA)) | |
{ | |
/* Set ADC state */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_REG_EOC); | |
/* Determine whether any further conversion upcoming on group regular */ | |
/* by external trigger, continuous mode or scan sequence on going. */ | |
if(ADC_IS_SOFTWARE_START_REGULAR(hadc) && | |
(hadc->Init.ContinuousConvMode == DISABLE) ) | |
{ | |
/* If End of Sequence is reached, disable interrupts */ | |
if( __HAL_ADC_GET_FLAG(hadc, ADC_FLAG_EOS) ) | |
{ | |
/* Allowed to modify bits ADC_IT_EOC/ADC_IT_EOS only if bit */ | |
/* ADSTART==0 (no conversion on going) */ | |
if (ADC_IS_CONVERSION_ONGOING_REGULAR(hadc) == RESET) | |
{ | |
/* Disable ADC end of single conversion interrupt on group regular */ | |
/* Note: Overrun interrupt was enabled with EOC interrupt in */ | |
/* HAL_Start_IT(), but is not disabled here because can be used */ | |
/* by overrun IRQ process below. */ | |
__HAL_ADC_DISABLE_IT(hadc, ADC_IT_EOC | ADC_IT_EOS); | |
/* Set ADC state */ | |
ADC_STATE_CLR_SET(hadc->State, | |
HAL_ADC_STATE_REG_BUSY, | |
HAL_ADC_STATE_READY); | |
} | |
else | |
{ | |
/* Change ADC state to error state */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG); | |
/* Set ADC error code to ADC IP internal error */ | |
SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_INTERNAL); | |
} | |
} | |
} | |
/* Conversion complete callback */ | |
HAL_ADC_ConvCpltCallback(hadc); | |
} | |
else | |
{ | |
/* Call DMA error callback */ | |
hadc->DMA_Handle->XferErrorCallback(hdma); | |
} | |
} | |
/** | |
* @brief DMA half transfer complete callback. | |
* @param hdma: pointer to DMA handle. | |
* @retval None | |
*/ | |
static void ADC_DMAHalfConvCplt(DMA_HandleTypeDef *hdma) | |
{ | |
/* Retrieve ADC handle corresponding to current DMA handle */ | |
ADC_HandleTypeDef* hadc = ( ADC_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent; | |
/* Half conversion callback */ | |
HAL_ADC_ConvHalfCpltCallback(hadc); | |
} | |
/** | |
* @brief DMA error callback. | |
* @param hdma: pointer to DMA handle. | |
* @retval None | |
*/ | |
static void ADC_DMAError(DMA_HandleTypeDef *hdma) | |
{ | |
/* Retrieve ADC handle corresponding to current DMA handle */ | |
ADC_HandleTypeDef* hadc = ( ADC_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent; | |
/* Set ADC state */ | |
SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_DMA); | |
/* Set ADC error code to DMA error */ | |
SET_BIT(hadc->ErrorCode, HAL_ADC_ERROR_DMA); | |
/* Error callback */ | |
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 / 1000000U)); | |
while(waitLoopIndex != 0U) | |
{ | |
waitLoopIndex--; | |
} | |
} | |
#endif /* HAL_ADC_MODULE_ENABLED */ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |