/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file    PWR/PWR_LPSLEEP/Src/main.c
  * @author  MCD Application Team
  * @brief   This sample code shows how to use STM32G0xx PWR HAL API to enter
  *          and exit the Low Power Sleep mode.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2018-2020 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 "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
#define LED_TOGGLE_DELAY         100
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
ADC_HandleTypeDef hadc1;

RTC_HandleTypeDef hrtc;

/* USER CODE BEGIN PV */
static uint32_t TimingDelay;

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_RTC_Init(void);
static void MX_ADC1_Init(void);
/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Decrease(void);
void ADC_Desequence_Powerhungry_Channels( void );
void smartlogger_set_gpios_as_lowpower( void );
/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_RTC_Init();
  MX_ADC1_Init();
  /* USER CODE BEGIN 2 */
  /* Enable Power Clock */
  __HAL_RCC_PWR_CLK_ENABLE();
  

  /* Configure LED4 */
  BSP_LED_Init(LED4);

  /* User push-button (line 4_15) will be used to wakeup the system from STOP mode */
  BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);

  /* Enable Flash power down mode during Sleep mode     */
  /* (uncomment this line if power consumption figures  */
  /*  must be measured with Flash still on in Low Power */
  /*  Sleep mode)                                       */
  HAL_PWREx_EnableFlashPowerDown(PWR_FLASHPD_LPSLEEP);

  RCC->IOPSMENR  = 0x00u;
  RCC->AHBSMENR  = 0x00u;

  RCC->APBSMENR1 = 0x00u;
  RCC->APBSMENR2 = 0x00u;
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
	  TimingDelay = HAL_ADC_GetValue( &hadc1 );

	  ADC_ConversionStop( &hadc1 );

	  ADC_Desequence_Powerhungry_Channels();

	  HAL_ADC_MspDeInit( &hadc1 );
	  /* Reduce the System clock to below 2 MHz */
//	  GPIO_InitTypeDef GPIO_InitStruct = {0};
//
//	  GPIO_InitStruct.Pin = GPIO_PIN_7;
//	  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
//	  GPIO_InitStruct.Pull = GPIO_PULLDOWN;
//	  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
//	  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /* Insert 3 seconds delay */
    HAL_Delay(3000);

    /* Reduce the System clock to below 2 MHz */
    SystemClock_Decrease();

    smartlogger_set_gpios_as_lowpower();

	__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WUF);

	HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1);



    /* De-init LED4 */
    BSP_LED_DeInit(LED4);



	//	stALARME alarme = { .Hours = 0, .Minutes = 2, .Seconds = 0 };
	//
	//	rtc_set_alarm( alarme );
	//
	//	    HAL_RTCEx_DeactivateWakeUpTimer(&hrtc);
	//
	//

	/*## Configure the Wake up timer ###########################################*/
	/*  RTC Wake-up Interrupt Generation:
     Wake-up Time Base = (RTC_WAKEUPCLOCK_RTCCLK_DIV /(LSI))
     ==> WakeUpCounter = Wake-up Time / Wake-up Time Base

     To configure the wake up timer to 10s the WakeUpCounter is set to 0x1770:
       RTC_WAKEUPCLOCK_RTCCLK_DIV = RTCCLK_Div16 = 16
       Wake-up Time Base = 16 /(32KHz) = 0.0005 seconds
       ==> WakeUpCounter = ~10s/0.0005s = 20000 = 0x1770 */
//	if (HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 5, RTC_WAKEUPCLOCK_CK_SPRE_16BITS) != HAL_OK)
//	{
//		__NOP();
//
//	}
    HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 5, RTC_WAKEUPCLOCK_CK_SPRE_16BITS);

    /* Suspend Tick increment to prevent wakeup by Systick interrupt.         */
    /* Otherwise the Systick interrupt will wake up the device within 1ms     */
    /* (HAL time base).                                                       */
    HAL_SuspendTick();

    /* Enter Sleep Mode, wake up is done once User push-button is pressed */
//    HAL_PWR_EnterSLEEPMode(PWR_LOWPOWERREGULATOR_ON, PWR_SLEEPENTRY_WFI);
    HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_SLEEPENTRY_WFI);

    /* ... Low-power SLEEP mode ... */

    /* System is Low Power Run mode when exiting Low Power Sleep mode,
       disable low power run mode and reset the clock to initialization configuration */ 
    HAL_PWREx_DisableLowPowerRunMode();

//    HAL_NVIC_SystemReset();//by well

    /* Configure the system clock for the RUN mode */
    SystemClock_Config();

    /* Re-init LED4 to toggle during Run mode */
    BSP_LED_Init(LED4);

    /* Resume Tick interrupt if disabled prior to Low Power Sleep mode entry */
    HAL_ResumeTick();
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage
  */
  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);

  /** Configure LSE Drive Capability
  */
  HAL_PWR_EnableBkUpAccess();
  __HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_LSE;
  RCC_OscInitStruct.LSEState = RCC_LSE_ON;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV4;
  RCC_OscInitStruct.PLL.PLLN = 70;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV10;
  RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV5;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief ADC1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_ADC1_Init(void)
{

  /* USER CODE BEGIN ADC1_Init 0 */

  /* USER CODE END ADC1_Init 0 */

  ADC_ChannelConfTypeDef sConfig = {0};

  /* USER CODE BEGIN ADC1_Init 1 */

  /* USER CODE END ADC1_Init 1 */

  /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
  */
  hadc1.Instance = ADC1;
  hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV10;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
  hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  hadc1.Init.LowPowerAutoWait = DISABLE;
  hadc1.Init.LowPowerAutoPowerOff = DISABLE;
  hadc1.Init.ContinuousConvMode = DISABLE;
  hadc1.Init.NbrOfConversion = 2;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc1.Init.DMAContinuousRequests = DISABLE;
  hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
  hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_1CYCLE_5;
  hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_1CYCLE_5;
  hadc1.Init.OversamplingMode = DISABLE;
  hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH;
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure Regular Channel
  */
  sConfig.Channel = ADC_CHANNEL_VREFINT;
  sConfig.Rank = ADC_REGULAR_RANK_1;
  sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_1;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure Regular Channel
  */
  sConfig.Channel = ADC_CHANNEL_7;
  sConfig.Rank = ADC_REGULAR_RANK_2;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN ADC1_Init 2 */

  /* USER CODE END ADC1_Init 2 */

}

/**
  * @brief RTC Initialization Function
  * @param None
  * @retval None
  */
static void MX_RTC_Init(void)
{

  /* USER CODE BEGIN RTC_Init 0 */

  /* USER CODE END RTC_Init 0 */

  RTC_TimeTypeDef sTime = {0};
  RTC_DateTypeDef sDate = {0};

  /* USER CODE BEGIN RTC_Init 1 */

  /* USER CODE END RTC_Init 1 */

  /** Initialize RTC Only
  */
  hrtc.Instance = RTC;
  hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
  hrtc.Init.AsynchPrediv = 127;
  hrtc.Init.SynchPrediv = 255;
  hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
  hrtc.Init.OutPutRemap = RTC_OUTPUT_REMAP_NONE;
  hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
  hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
  hrtc.Init.OutPutPullUp = RTC_OUTPUT_PULLUP_NONE;
  if (HAL_RTC_Init(&hrtc) != HAL_OK)
  {
    Error_Handler();
  }

  /* USER CODE BEGIN Check_RTC_BKUP */

  /* USER CODE END Check_RTC_BKUP */

  /** Initialize RTC and set the Time and Date
  */
  sTime.Hours = 0x0;
  sTime.Minutes = 0x0;
  sTime.Seconds = 0x0;
  sTime.SubSeconds = 0x0;
  sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
  sTime.StoreOperation = RTC_STOREOPERATION_RESET;
  if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BCD) != HAL_OK)
  {
    Error_Handler();
  }
  sDate.WeekDay = RTC_WEEKDAY_MONDAY;
  sDate.Month = RTC_MONTH_JANUARY;
  sDate.Date = 0x1;
  sDate.Year = 0x0;

  if (HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BCD) != HAL_OK)
  {
    Error_Handler();
  }

  /** Enable the WakeUp
  */
  if (HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 5, RTC_WAKEUPCLOCK_CK_SPRE_16BITS) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN RTC_Init 2 */

  /* USER CODE END RTC_Init 2 */

}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

}

/* USER CODE BEGIN 4 */
/**
  * @brief  System Clock Speed decrease
  *         The system Clock source is shifted from PLL to HSI DIV8
  *         to go down to 2 MHz
  * @param  None
  * @retval None
  */
void SystemClock_Decrease(void)
{
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};

  /* Select HSI as system clock source */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    /* Initialization Error */
    Error_Handler();
  }

  /* Modify HSI to HSI DIV8 */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV8;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    /* Initialization Error */
    Error_Handler();
  }
}

/**
  * @brief SYSTICK callback
  * @param None
  * @retval None
  */
void HAL_SYSTICK_Callback(void)
{
  if (TimingDelay != 0)
  {
    TimingDelay--;
  }
  else
  {
    /* Toggle LED4 */
    BSP_LED_Toggle(LED4);
    TimingDelay = LED_TOGGLE_DELAY;
  }
}

void ADC_Desequence_Powerhungry_Channels( void ){


  ADC_ChannelConfTypeDef sConfig;




  /**Configure for the selected ADC regular channel NOT to be converted.


   */


  sConfig.Channel = ADC_CHANNEL_VREFINT;


  sConfig.Rank = ADC_RANK_NONE;  // Disable the selected rank (selected channel) from sequencer


  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK){


    Error_Handler();


  }


}

void smartlogger_set_gpios_as_lowpower( void ){
	__HAL_RCC_GPIOA_CLK_ENABLE();
	__HAL_RCC_GPIOB_CLK_ENABLE();
	__HAL_RCC_GPIOC_CLK_ENABLE();
	__HAL_RCC_GPIOD_CLK_ENABLE();
	__HAL_RCC_GPIOF_CLK_ENABLE();

	HAL_GPIO_Init( GPIOA, &((GPIO_InitTypeDef){.Pin = GPIO_PIN_All & ~(GPIO_PIN_7|GPIO_PIN_13|GPIO_PIN_14),
		.Mode = GPIO_MODE_INPUT,
		.Pull = GPIO_PULLDOWN,
		.Speed = GPIO_SPEED_FREQ_LOW,
		.Alternate = 0 } ));

	HAL_GPIO_Init( GPIOA, &((GPIO_InitTypeDef){.Pin = GPIO_PIN_7,
		.Mode = GPIO_MODE_INPUT,
		.Pull = GPIO_NOPULL,
		.Speed = GPIO_SPEED_FREQ_LOW,
		.Alternate = 0 } ));

	HAL_GPIO_Init( GPIOB, &((GPIO_InitTypeDef){.Pin = GPIO_PIN_All,
		.Mode = GPIO_MODE_INPUT,
		.Pull = GPIO_PULLDOWN,
		.Speed = GPIO_SPEED_FREQ_LOW,
		.Alternate = 0 } ));

	HAL_GPIO_Init( GPIOC, &((GPIO_InitTypeDef){.Pin = GPIO_PIN_All & ~(GPIO_PIN_14|GPIO_PIN_15),
		.Mode = GPIO_MODE_INPUT,
		.Pull = GPIO_PULLDOWN,
		.Speed = GPIO_SPEED_FREQ_LOW,
		.Alternate = 0 } ));

	HAL_GPIO_Init( GPIOD, &((GPIO_InitTypeDef){.Pin = GPIO_PIN_All & ~(GPIO_PIN_0),
		.Mode = GPIO_MODE_INPUT,
		.Pull = GPIO_PULLDOWN,
		.Speed = GPIO_SPEED_FREQ_LOW,
		.Alternate = 0 } ));

	HAL_GPIO_Init( GPIOD, &((GPIO_InitTypeDef){.Pin = GPIO_PIN_0,
		.Mode = GPIO_MODE_INPUT,
		.Pull = GPIO_PULLUP,
		.Speed = GPIO_SPEED_FREQ_LOW,
		.Alternate = 0 } ));

	HAL_GPIO_Init( GPIOF, &((GPIO_InitTypeDef){.Pin = GPIO_PIN_All,
		.Mode = GPIO_MODE_INPUT,
		.Pull = GPIO_PULLDOWN,
		.Speed = GPIO_SPEED_FREQ_LOW,
		.Alternate = 0 } ));

	__HAL_RCC_GPIOA_CLK_DISABLE();
	__HAL_RCC_GPIOB_CLK_DISABLE();
	__HAL_RCC_GPIOC_CLK_DISABLE();
	__HAL_RCC_GPIOD_CLK_DISABLE();
	__HAL_RCC_GPIOF_CLK_DISABLE();
}

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  
  /* Suspend tick */
  HAL_SuspendTick();

  /* Turn LED4 on */
  BSP_LED_On(LED4);
  while(1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#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 CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
    ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
   /* Infinite loop */
  while (1)
  {
  }
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */