mirror of https://github.com/rusefi/cantact-fw.git
266 lines
10 KiB
C
266 lines
10 KiB
C
/**
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******************************************************************************
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* @file stm32f0xx_hal_adc_ex.c
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* @author MCD Application Team
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* @version V1.1.0
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* @date 03-Oct-2014
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* @brief This file provides firmware functions to manage the following
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* functionalities of the Analog to Digital Convertor (ADC)
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* peripheral:
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* + Operation functions
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* ++ Calibration (ADC automatic self-calibration)
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*
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@verbatim
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==============================================================================
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##### ADC specific features #####
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==============================================================================
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[..]
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(#) 12-bit, 10-bit, 8-bit or 6-bit configurable resolution
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(#) Interrupt generation at the end of regular conversion and in case of
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analog watchdog or overrun events.
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(#) Single and continuous conversion modes.
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(#) Scan mode for automatic conversion of channel 0 to channel 'n'.
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(#) Data alignment with in-built data coherency.
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(#) Programmable sampling time.
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(#) ADC conversion group Regular.
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(#) External trigger (timer or EXTI) with configurable polarity.
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(#) DMA request generation for transfer of conversions data of regular group.
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(#) ADC calibration
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(#) ADC supply requirements: 2.4 V to 3.6 V at full speed and down to 1.8 V at
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slower speed.
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(#) ADC input range: from Vref minud (connected to Vssa) to Vref plus(connected to
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Vdda or to an external voltage reference).
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##### How to use this driver #####
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==============================================================================
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[..]
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(#) Enable the ADC interface
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As prerequisite, into HAL_ADC_MspInit(), ADC clock must be configured
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at RCC top level: clock source and clock prescaler.
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Two possible clock sources: synchronous clock derived from APB clock
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or asynchronous clock derived from ADC dedicated HSI RC oscillator
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14MHz.
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Example:
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__ADC1_CLK_ENABLE(); (mandatory)
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HI14 enable or let under control of ADC: (optional)
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RCC_OscInitTypeDef RCC_OscInitStructure;
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RCC_OscInitStructure.OscillatorType = RCC_OSCILLATORTYPE_HSI14;
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RCC_OscInitStructure.HSI14CalibrationValue = RCC_HSI14CALIBRATION_DEFAULT;
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RCC_OscInitStructure.HSI14State = RCC_HSI14_ADC_CONTROL;
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RCC_OscInitStructure.PLL... (optional if used for system clock)
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HAL_RCC_OscConfig(&RCC_OscInitStructure);
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Parameter "HSI14State" must be set either:
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- to "...HSI14State = RCC_HSI14_ADC_CONTROL" to let the ADC control
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the HSI14 oscillator enable/disable (if not used to supply the main
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system clock): feature used if ADC mode LowPowerAutoPowerOff is
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enabled.
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- to "...HSI14State = RCC_HSI14_ON" to maintain the HSI14 oscillator
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always enabled: can be used to supply the main system clock.
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(#) ADC pins configuration
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(++) Enable the clock for the ADC GPIOs using the following function:
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__GPIOx_CLK_ENABLE();
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(++) Configure these ADC pins in analog mode using HAL_GPIO_Init();
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(#) Configure the ADC parameters (conversion resolution, data alignment,
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continuous mode, ...) using the HAL_ADC_Init() function.
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(#) Activate the ADC peripheral using one of the start functions:
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HAL_ADC_Start(), HAL_ADC_Start_IT(), HAL_ADC_Start_DMA().
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*** Regular channels group configuration ***
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============================================
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[..]
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(+) To configure the ADC regular channels group features, use
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HAL_ADC_Init() and HAL_ADC_ConfigChannel() functions.
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(+) To activate the continuous mode, use the HAL_ADC_Init() function.
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(+) To read the ADC converted values, use the HAL_ADC_GetValue() function.
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*** DMA for Regular channels group features configuration ***
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=============================================================
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[..]
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(+) To enable the DMA mode for regular channels group, use the
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HAL_ADC_Start_DMA() function.
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(+) To enable the generation of DMA requests continuously at the end of
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the last DMA transfer, use the HAL_ADC_Init() function.
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@endverbatim
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f0xx_hal.h"
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/** @addtogroup STM32F0xx_HAL_Driver
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* @{
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*/
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/** @defgroup ADCEx ADCEx Extended HAL Module Driver
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* @brief ADC HAL module driver
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* @{
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*/
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#ifdef HAL_ADC_MODULE_ENABLED
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/** @defgroup ADCEx_Private_Constants ADCEx Private Constants
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* @{
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*/
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/* Fixed timeout values for ADC calibration, enable settling time, disable */
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/* settling time. */
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/* Values defined to be higher than worst cases: low clock frequency, */
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/* maximum prescaler. */
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/* Ex of profile low frequency : Clock source at 0.1 MHz, ADC clock */
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/* prescaler 4. */
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/* Unit: ms */
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#define ADC_DISABLE_TIMEOUT 2
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#define ADC_CALIBRATION_TIMEOUT 2
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/**
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* @}
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*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/** @defgroup ADCEx_Exported_Functions ADCEx Exported Functions
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* @{
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*/
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/** @defgroup ADCEx_Exported_Functions_Group1 Extended Initialization/de-initialization functions
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* @brief Extended Initialization and Configuration functions
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*
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@verbatim
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===============================================================================
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##### IO operation functions #####
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===============================================================================
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[..] This section provides functions allowing to:
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(+) Perform the ADC calibration.
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@endverbatim
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* @{
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*/
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/**
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* @brief Perform an ADC automatic self-calibration
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* Calibration prerequisite: ADC must be disabled (execute this
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* function before HAL_ADC_Start() or after HAL_ADC_Stop() ).
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* @note Calibration factor can be read after calibration, using function
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* HAL_ADC_GetValue() (value on 7 bits: from DR[6;0]).
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* @param hadc: ADC handle
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_ADCEx_Calibration_Start(ADC_HandleTypeDef* hadc)
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{
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HAL_StatusTypeDef tmpHALStatus = HAL_OK;
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uint32_t tickstart=0;
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/* Check the parameters */
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assert_param(IS_ADC_ALL_INSTANCE(hadc->Instance));
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/* Process locked */
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__HAL_LOCK(hadc);
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/* Calibration prerequisite: ADC must be disabled. */
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if (__HAL_ADC_IS_ENABLED(hadc) == RESET )
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{
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/* Change ADC state */
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hadc->State = HAL_ADC_STATE_READY;
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/* Start ADC calibration */
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hadc->Instance->CR |= ADC_CR_ADCAL;
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tickstart = HAL_GetTick();
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/* Wait for calibration completion */
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while(HAL_IS_BIT_SET(hadc->Instance->CR, ADC_CR_ADCAL))
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{
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if((HAL_GetTick() - tickstart) > ADC_CALIBRATION_TIMEOUT)
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{
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/* Update ADC state machine to error */
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hadc->State = HAL_ADC_STATE_ERROR;
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/* Process unlocked */
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__HAL_UNLOCK(hadc);
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return HAL_ERROR;
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}
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}
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}
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else
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{
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/* Update ADC state machine to error */
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hadc->State = HAL_ADC_STATE_ERROR;
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}
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/* Process unlocked */
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__HAL_UNLOCK(hadc);
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/* Return function status */
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return tmpHALStatus;
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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#endif /* HAL_ADC_MODULE_ENABLED */
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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