/**
  ******************************************************************************
  * @file    main.c
  * @author  MCU Application Team
  * @brief   Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2023 Puya Semiconductor Co.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by Puya under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private define ------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
ADC_HandleTypeDef        hADC1;
uint16_t                 uhADCxConvertedData;
uint16_t                 uhVCC;

/* Private user code ---------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
static void APP_SystemClockConfig(void);
static void APP_AdcConfig(void);

/**
  * @brief  Main program.
  * @retval int
  */
int main(void)
{
  /* Reset of all peripherals, Initializes the Systick. */
  HAL_Init();
  
  /* Configure system clock */
  APP_SystemClockConfig(); 

  /* Initialize UART */
  BSP_UART_Config();
  
  /* Configure ADC */
  APP_AdcConfig();
   
  /* ADC Calibrate */   
  if (HAL_ADCEx_Calibration_Start(&hADC1, ADC_CALIBRATION_NUMBER_1) != HAL_OK)
  {
    APP_ErrorHandler();
  }
  
  /* ADC Start */
  HAL_ADC_Start(&hADC1);

  while(1)
  {
   /* Poll For ADC Conversion */
    if(HAL_ADC_PollForConversion(&hADC1, 2000) == HAL_OK)
    {
      /* Get ADC Value */
      uhADCxConvertedData = HAL_ADC_GetValue(&hADC1); 
       
      uhVCC = 4095*1200/uhADCxConvertedData; 

      /* Printf VCC Data */
      printf("VCC : %umV\r\n",(unsigned int)uhVCC);
    }
    HAL_Delay(1000);
  } 
}

/**
  * @brief  ADC Configuration
  * @param  None
  * @retval None
  */
static void APP_AdcConfig(void)
{
  ADC_ChannelConfTypeDef   sConfig = {0};
  
  hADC1.Instance = ADC1;
  
  hADC1.Init.ClockPrescaler        = ADC_CLOCK_SYNC_PCLK_DIV1;
  hADC1.Init.Resolution            = ADC_RESOLUTION_12B;               /* 12-bit resolution for converted data  */
  hADC1.Init.DataAlign             = ADC_DATAALIGN_RIGHT;              /* Right-alignment for converted data */
  hADC1.Init.GainCompensation      = 0;                                /* Gain compensation disabled */
  hADC1.Init.ScanConvMode          = ADC_SCAN_DISABLE;                 /* Scan Mode Disable */
  hADC1.Init.EOCSelection          = ADC_EOC_SINGLE_CONV;              /* End of unitary conversion flag */ 
  hADC1.Init.LowPowerAutoWait      = ENABLE;                           /* Low power mode enable */
  hADC1.Init.ContinuousConvMode    = ENABLE;                           /* Continuous Mode */
  hADC1.Init.NbrOfConversion       = 1;                                /* Conversion Number 1 */
  hADC1.Init.DiscontinuousConvMode = DISABLE;                          /* Discontinuous Mode Disable */
  /* hADC1.Init.NbrOfDiscConversion   = 1; */                          /* Discontinuous Conversion Number 1 */
  hADC1.Init.ExternalTrigConv      = ADC_SOFTWARE_START;               /* SW Trigger */
  /* hADC1.Init.ExternalTrigConvEdge  = ADC_EXTERNALTRIGCONVEDGE_RISING; */  /* Rising edge trigger */
  hADC1.Init.OversamplingMode      = DISABLE;                          /* Oversampling disable */
  /* hADC1.Init.Oversampling.Ratio    = ADC_OVERSAMPLING_RATIO_16;                     */
  /* hADC1.Init.Oversampling.RightBitShift = ADC_RIGHTBITSHIFT_4;                      */
  /* hADC1.Init.Oversampling.TriggeredMode = ADC_TRIGGEREDMODE_MULTI_TRIGGER;          */
  /* hADC1.Init.Oversampling.OversamplingStopReset = ADC_REGOVERSAMPLING_RESUMED_MODE; */
  
  if (HAL_ADC_Init(&hADC1) != HAL_OK)
  {
    APP_ErrorHandler();
  }
  
  sConfig.Channel      = ADC_CHANNEL_VREFINT;
  sConfig.Rank         = ADC_REGULAR_RANK_1;
  sConfig.SamplingTime = ADC_SAMPLETIME_640CYCLES_5;
  sConfig.SingleDiff   = ADC_SINGLE_ENDED;
  sConfig.OffsetNumber = ADC_OFFSET_NONE;
  /* sConfig.Offset       = 0;                         */
  /* sConfig.OffsetSign   = ADC_OFFSET_SIGN_POSITIVE;  */
  /* sConfig.OffsetSaturation = DISABLE;               */
  if (HAL_ADC_ConfigChannel(&hADC1, &sConfig) != HAL_OK)
  {
    APP_ErrorHandler();
  }
}

/**
  * @brief  System Clock Configuration
  * @param  None
  * @retval None
  */
static void APP_SystemClockConfig(void)
{
  RCC_OscInitTypeDef  OscInitstruct = {0};
  RCC_ClkInitTypeDef  ClkInitstruct = {0};
  
  OscInitstruct.OscillatorType      = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_LSE | 
                                      RCC_OSCILLATORTYPE_LSI;
  OscInitstruct.HSIState            = RCC_HSI_ON;                               /* Enable HSI */
  OscInitstruct.HSIDiv              = RCC_HSI_DIV1;                             /* HSI 1 frequency division */
  OscInitstruct.HSICalibrationValue = RCC_HSICALIBRATION_8MHz;                  /* Configure HSI clock 8MHz */
  OscInitstruct.HSEState            = RCC_HSE_OFF;                              /* Close HSE */
/* OscInitstruct.HSEFreq             = RCC_HSE_24_32MHz; */                     /* Choose HSE frequency of 24-32MHz */
  OscInitstruct.LSEState            = RCC_LSE_OFF;                              /* Close LSE */
/* OscInitstruct.LSEDriver           = RCC_LSEDRIVE_HIGH; */                    /* Drive capability level: high */
  OscInitstruct.LSIState            = RCC_LSI_OFF;                              /* Close LSI */
  OscInitstruct.PLL.PLLState        = RCC_PLL_OFF;                              /* Close PLL */
/* OscInitstruct.PLL.PLLSource       = RCC_PLLSOURCE_HSI; */                    /* PLL clock source selection HSI */
/* OscInitstruct.PLL.PLLMUL          = RCC_PLL_MUL16; */                        /* PLL clock source 16-fold frequency */
  /* Configure oscillator */
  if(HAL_RCC_OscConfig(&OscInitstruct) != HAL_OK)
  {
    APP_ErrorHandler();
  }
  
  ClkInitstruct.ClockType       = RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
  ClkInitstruct.SYSCLKSource    = RCC_SYSCLKSOURCE_HSISYS;              /* System clock selection HSISYS */
  ClkInitstruct.AHBCLKDivider   = RCC_SYSCLK_DIV1;                      /* AHB clock 1 division */
  ClkInitstruct.APB1CLKDivider  = RCC_HCLK_DIV1;                        /* APB1 clock 1 division */
  ClkInitstruct.APB2CLKDivider  = RCC_HCLK_DIV2;                        /* APB2 clock 2 division */
  /* Configure Clock */
  if(HAL_RCC_ClockConfig(&ClkInitstruct, FLASH_LATENCY_0) != HAL_OK)
  {
    APP_ErrorHandler();
  }
}

/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
void APP_ErrorHandler(void)
{
  /* Infinite loop */
  while (1)
  {
  }
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* User can add his own implementation to report the file name and line number,
     for example: printf("Wrong parameters value: file %s on line %d\r\n", file, line)  */
  /* Infinite loop */
  while (1)
  {
  }
}
#endif /* USE_FULL_ASSERT */

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