sggt/Core/Src/dac.c

/* USER CODE BEGIN Header */
/**
 ******************************************************************************
 * @file    dac.c
 * @brief   This file provides code for the configuration
 *          of the DAC instances.
 ******************************************************************************
 * @attention
 *
 * Copyright (c) 2024 STMicroelectronics.
 * All rights reserved.
 *
 * This software is licensed under terms that can be found in the LICENSE file
 * in the root directory of this software component.
 * If no LICENSE file comes with this software, it is provided AS-IS.
 *
 ******************************************************************************
 */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "dac.h"

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

DAC_HandleTypeDef hdac;

/* DAC init function */
void MX_DAC_Init(void)
{

  /* USER CODE BEGIN DAC_Init 0 */

  /* USER CODE END DAC_Init 0 */

  DAC_ChannelConfTypeDef sConfig = {0};

  /* USER CODE BEGIN DAC_Init 1 */

  /* USER CODE END DAC_Init 1 */

  /** DAC Initialization
  */
  hdac.Instance = DAC;
  if (HAL_DAC_Init(&hdac) != HAL_OK)
  {
    Error_Handler();
  }

  /** DAC channel OUT1 config
  */
  sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
  sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
  if (HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN DAC_Init 2 */
  HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
  /* USER CODE END DAC_Init 2 */

}

void HAL_DAC_MspInit(DAC_HandleTypeDef* dacHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(dacHandle->Instance==DAC)
  {
  /* USER CODE BEGIN DAC_MspInit 0 */

  /* USER CODE END DAC_MspInit 0 */
    /* DAC clock enable */
    __HAL_RCC_DAC_CLK_ENABLE();

    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**DAC GPIO Configuration
    PA4     ------> DAC_OUT1
    */
    GPIO_InitStruct.Pin = CV_DAC_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(CV_DAC_GPIO_Port, &GPIO_InitStruct);

    /* DAC interrupt Init */
    HAL_NVIC_SetPriority(TIM6_DAC_IRQn, 5, 0);
    HAL_NVIC_EnableIRQ(TIM6_DAC_IRQn);
  /* USER CODE BEGIN DAC_MspInit 1 */

  /* USER CODE END DAC_MspInit 1 */
  }
}

void HAL_DAC_MspDeInit(DAC_HandleTypeDef* dacHandle)
{

  if(dacHandle->Instance==DAC)
  {
  /* USER CODE BEGIN DAC_MspDeInit 0 */

  /* USER CODE END DAC_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_DAC_CLK_DISABLE();

    /**DAC GPIO Configuration
    PA4     ------> DAC_OUT1
    */
    HAL_GPIO_DeInit(CV_DAC_GPIO_Port, CV_DAC_Pin);

    /* DAC interrupt Deinit */
  /* USER CODE BEGIN DAC:TIM6_DAC_IRQn disable */
    /**
    * Uncomment the line below to disable the "TIM6_DAC_IRQn" interrupt
    * Be aware, disabling shared interrupt may affect other IPs
    */
    /* HAL_NVIC_DisableIRQ(TIM6_DAC_IRQn); */
  /* USER CODE END DAC:TIM6_DAC_IRQn disable */

  /* USER CODE BEGIN DAC_MspDeInit 1 */

  /* USER CODE END DAC_MspDeInit 1 */
  }
}

/* USER CODE BEGIN 1 */

void dac_set_voltage(float *vol)
{
  if (vol == NULL) return;

  //对mux_signal.sv作限幅
  if( *vol > 30.0f )
  {
    *vol = 30.0f;
  }
  else if ( *vol < 0.0f )
  {
    *vol = 0.0f;
  }

  float temp = *vol;
  /**********在此处进行电压输出（V）校准，temp为目标值**********/
  temp = calibrate_vol_v_out(temp);

  //校准后再进行一次限幅，以防运算出错
  if( temp > 30.0f )
  {
    temp = 30.0f;
  }
  else if ( temp < 0.0f )
  {
    temp = 0.0f;
  }
  mux_signal.sv_calibrated = temp;
  /**********************************************************/
  
  temp /= 10.0f;
  temp = temp * 4096 / 3.0f;

  if (temp >= 4096)
    temp = 4095;

  HAL_DAC_SetValue(&hdac, DAC_CHANNEL_1, DAC_ALIGN_12B_R, temp);
}

uint8_t volv_out_cal_enable = 0;
float calibrate_vol_v_out(float raw)
{
  float result = 0;

  switch (volv_out_cal_enable)
  {
    case 0:   //开机后只读一次
    {
      uint16_t cal_check = 0;

      cal_check = eeprom_readdata(CAL_VOL_V_OUT_ADDR_FLAG) << 8;
      cal_check |= eeprom_readdata(CAL_VOL_V_OUT_ADDR_FLAG + 8) & 0x00FF;

      if(cal_check != 0xAAAA) 
      {
        //不存在校准数据
        volv_out_cal_enable = 2;
      }
      else
      {
        //存在校准数据
        volv_out_cal_enable = 1;

        //将读到的数据存储至vol_v_calibrate_table
        eeprom_dataread_single(EEPROM_TAG_CAL_VOL_V_OUT);
      }
    }
    break;

    case 1:   //执行校准
    {
      //计算区间间隔（按照规定的点数，在量程范围内平均分配）
      float interval = (float32)(CALIBRATE_VOL_V_OUT_END - CALIBRATE_VOL_V_OUT_START)/(float32)(CALIBRATE_VOL_V_OUT_POINTS - 1);

      for( uint8_t i = 0; i < CALIBRATE_VOL_V_OUT_POINTS - 1; i++)
      {
        if( (cali_paras.cali_vol_V_out[i] <= raw)&&(raw <= cali_paras.cali_vol_V_out[i + 1]) )
        {
          result = CALIBRATE_VOL_V_OUT_START + i*interval;    //所处区间的左端点
          result += interval * (raw - cali_paras.cali_vol_V_out[i])/(cali_paras.cali_vol_V_out[i + 1] - cali_paras.cali_vol_V_out[i]);
          break;
        }
      }
    }
    break;

    case 2:   //不执行校准
    {
      result = raw;
    }
    break;
  
    default:
    break;
  }

  return result;
}
/* USER CODE END 1 */