File content as of revision 19:35f7b17d4bb5:

/**
  ******************************************************************************
  * File Name          : adc.c
  * Description        : This file provides code for the configuration
  *                      of the ADC instances.
  ******************************************************************************
  ** This notice applies to any and all portions of this file
  * that are not between comment pairs USER CODE BEGIN and
  * USER CODE END. Other portions of this file, whether 
  * inserted by the user or by software development tools
  * are owned by their respective copyright owners.
  *
  * COPYRIGHT(c) 2019 STMicroelectronics
  *
  * 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 "adc.h"
#include "gpio.h"

ADC_HandleTypeDef hadc;

/* ADC init function */
void MX_ADC_Init(void)
{
    ADC_ChannelConfTypeDef sConfig;

    /* Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) */
    hadc.Instance = ADC1;

    hadc.Init.OversamplingMode = DISABLE;
    hadc.Init.Oversample.Ratio = ADC_OVERSAMPLING_RATIO_16;
    hadc.Init.Oversample.RightBitShift = ADC_RIGHTBITSHIFT_4;
    hadc.Init.Oversample.TriggeredMode = ADC_TRIGGEREDMODE_SINGLE_TRIGGER;

    /* ADC SAMPLING FREQUENCY = ((12.5+ADC_SAMPLETIME_xCYCLES_x)*ADC_CLK)/OVERSAMPLING_RATIO */
    hadc.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV1;
    hadc.Init.LowPowerAutoWait = DISABLE;
    hadc.Init.LowPowerFrequencyMode = DISABLE;
    hadc.Init.LowPowerAutoPowerOff = DISABLE;

    hadc.Init.Resolution = ADC_RESOLUTION_12B;
    hadc.Init.SamplingTime = ADC_SAMPLETIME_3CYCLES_5;
    hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;
    hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
    hadc.Init.ContinuousConvMode = ENABLE;
    hadc.Init.DiscontinuousConvMode = DISABLE;
    hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
    hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;
    hadc.Init.DMAContinuousRequests = DISABLE;
    hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
    hadc.Init.Overrun = ADC_OVR_DATA_PRESERVED;

    if (HAL_ADC_Init(&hadc) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    /* Start calibration */
    if (HAL_ADCEx_Calibration_Start(&hadc, ADC_SINGLE_ENDED) != HAL_OK)
    {
        Error_Handler();
    }

    /* Configure for the selected ADC regular channel to be converted. */
    sConfig.Channel = ADC_CHANNEL_0;

    if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }
}

void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle)
{
  GPIO_InitTypeDef GPIO_InitStruct;
  if (adcHandle->Instance == ADC1)
  {
    /* ADC1 clock enable */
    __HAL_RCC_ADC1_CLK_ENABLE();
  
    /* ADC GPIO Configuration PA0 ------> ADC_IN0 */
    GPIO_InitStruct.Pin = GPIO_PIN_0;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /* Configure the NVIC */
    /* NVIC configuration for ADC EOC interrupt */
    HAL_NVIC_SetPriority(ADC1_COMP_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(ADC1_COMP_IRQn);
  }
}

void HAL_ADC_MspDeInit(ADC_HandleTypeDef* adcHandle)
{
  if(adcHandle->Instance == ADC1)
  {
    /* Peripheral clock disable */
    __HAL_RCC_ADC1_CLK_DISABLE();
  
    /* ADC GPIO Configuration PA0 ------> ADC_IN0 */
    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_0);

    /* Configure the NVIC */
    /* NVIC configuration for ADC EOC interrupt */
    HAL_NVIC_DisableIRQ(ADC1_COMP_IRQn);
  }
}

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/