/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2023 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 */

/* USER CODE END PD */

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

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MPU_Initialize(void);
static void MPU_Config(void);
static void MX_GPIO_Init(void);
static void MX_LPTIM1_Init(void);
static void MX_LPUART1_UART_Init(void);
static void MX_RTC_Init(void);
/* USER CODE BEGIN PFP */

/* 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. */
  LL_APB4_GRP1_EnableClock(LL_APB4_GRP1_PERIPH_SYSCFG);

  /* System interrupt init*/
  NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);

  /* SysTick_IRQn interrupt configuration */
  NVIC_SetPriority(SysTick_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),15, 0));

  /* 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_LPTIM1_Init();
  MX_LPUART1_UART_Init();
  MX_RTC_Init();
  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

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

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{

  /*AXI clock gating */
  RCC->CKGAENR = 0xFFFFFFFF;

  LL_FLASH_SetLatency(LL_FLASH_LATENCY_3);
  while(LL_FLASH_GetLatency()!= LL_FLASH_LATENCY_3)
  {
  }
  LL_PWR_ConfigSupply(LL_PWR_DIRECT_SMPS_SUPPLY);
  LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE0);
  while (LL_PWR_IsActiveFlag_VOS() == 0)
  {
  }
  LL_RCC_HSE_Enable();

   /* Wait till HSE is ready */
  while(LL_RCC_HSE_IsReady() != 1)
  {

  }
  LL_PWR_EnableBkUpAccess();
  LL_RCC_LSE_SetDriveCapability(LL_RCC_LSEDRIVE_LOW);
  LL_RCC_LSE_Enable();

   /* Wait till LSE is ready */
  while(LL_RCC_LSE_IsReady() != 1)
  {

  }
  LL_RCC_LSE_EnableCSS();
  LL_RCC_PLL_SetSource(LL_RCC_PLLSOURCE_HSE);
  LL_RCC_PLL1P_Enable();
  LL_RCC_PLL1_SetVCOInputRange(LL_RCC_PLLINPUTRANGE_4_8);
  LL_RCC_PLL1_SetVCOOutputRange(LL_RCC_PLLVCORANGE_WIDE);
  LL_RCC_PLL1_SetM(6);
  LL_RCC_PLL1_SetN(140);
  LL_RCC_PLL1_SetP(2);
  LL_RCC_PLL1_SetQ(2);
  LL_RCC_PLL1_SetR(2);
  LL_RCC_PLL1_Enable();

   /* Wait till PLL is ready */
  while(LL_RCC_PLL1_IsReady() != 1)
  {
  }

   /* Intermediate AHB prescaler 2 when target frequency clock is higher than 80 MHz */
   LL_RCC_SetAHBPrescaler(LL_RCC_AHB_DIV_2);

  LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL1);

   /* Wait till System clock is ready */
  while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL1)
  {

  }
  LL_RCC_SetAHBPrescaler(LL_RCC_AHB_DIV_2);
  LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2);
  LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
  LL_RCC_SetAPB3Prescaler(LL_RCC_APB3_DIV_2);
  LL_RCC_SetAPB4Prescaler(LL_RCC_APB4_DIV_1);

  LL_Init1msTick(280000000);

  LL_SetSystemCoreClock(280000000);
}

/**
  * @brief LPTIM1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_LPTIM1_Init(void)
{

  /* USER CODE BEGIN LPTIM1_Init 0 */

  /* USER CODE END LPTIM1_Init 0 */

  LL_RCC_SetLPTIMClockSource(LL_RCC_LPTIM1_CLKSOURCE_PCLK1);

  /* Peripheral clock enable */
  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_LPTIM1);

  /* LPTIM1 interrupt Init */
  NVIC_SetPriority(LPTIM1_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
  NVIC_EnableIRQ(LPTIM1_IRQn);

  /* USER CODE BEGIN LPTIM1_Init 1 */

  /* USER CODE END LPTIM1_Init 1 */
  LL_LPTIM_SetClockSource(LPTIM1, LL_LPTIM_CLK_SOURCE_INTERNAL);
  LL_LPTIM_SetPrescaler(LPTIM1, LL_LPTIM_PRESCALER_DIV1);
  LL_LPTIM_SetPolarity(LPTIM1, LL_LPTIM_OUTPUT_POLARITY_REGULAR);
  LL_LPTIM_SetUpdateMode(LPTIM1, LL_LPTIM_UPDATE_MODE_IMMEDIATE);
  LL_LPTIM_SetCounterMode(LPTIM1, LL_LPTIM_COUNTER_MODE_INTERNAL);
  LL_LPTIM_TrigSw(LPTIM1);
  LL_LPTIM_SetInput1Src(LPTIM1, LL_LPTIM_INPUT1_SRC_GPIO);
  LL_LPTIM_SetInput2Src(LPTIM1, LL_LPTIM_INPUT2_SRC_GPIO);
  /* USER CODE BEGIN LPTIM1_Init 2 */

  /* USER CODE END LPTIM1_Init 2 */

}

/**
  * @brief LPUART1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_LPUART1_UART_Init(void)
{

  /* USER CODE BEGIN LPUART1_Init 0 */

  /* USER CODE END LPUART1_Init 0 */

  LL_LPUART_InitTypeDef LPUART_InitStruct = {0};

  LL_GPIO_InitTypeDef GPIO_InitStruct = {0};

  LL_RCC_SetLPUARTClockSource(LL_RCC_LPUART1_CLKSOURCE_PCLK4);

  /* Peripheral clock enable */
  LL_APB4_GRP1_EnableClock(LL_APB4_GRP1_PERIPH_LPUART1);

  LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOB);
  /**LPUART1 GPIO Configuration
  PB6   ------> LPUART1_TX
  PB7   ------> LPUART1_RX
  */
  GPIO_InitStruct.Pin = LL_GPIO_PIN_6|LL_GPIO_PIN_7;
  GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
  GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
  GPIO_InitStruct.Alternate = LL_GPIO_AF_8;
  LL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /* USER CODE BEGIN LPUART1_Init 1 */

  /* USER CODE END LPUART1_Init 1 */
  LPUART_InitStruct.PrescalerValue = LL_LPUART_PRESCALER_DIV1;
  LPUART_InitStruct.BaudRate = 115200;
  LPUART_InitStruct.DataWidth = LL_LPUART_DATAWIDTH_8B;
  LPUART_InitStruct.StopBits = LL_LPUART_STOPBITS_1;
  LPUART_InitStruct.Parity = LL_LPUART_PARITY_NONE;
  LPUART_InitStruct.TransferDirection = LL_LPUART_DIRECTION_TX_RX;
  LPUART_InitStruct.HardwareFlowControl = LL_LPUART_HWCONTROL_NONE;
  LL_LPUART_Init(LPUART1, &LPUART_InitStruct);
  LL_LPUART_SetTXFIFOThreshold(LPUART1, LL_LPUART_FIFOTHRESHOLD_1_8);
  LL_LPUART_SetRXFIFOThreshold(LPUART1, LL_LPUART_FIFOTHRESHOLD_1_8);
  LL_LPUART_DisableFIFO(LPUART1);

  /* USER CODE BEGIN WKUPType LPUART1 */

  /* USER CODE END WKUPType LPUART1 */

  LL_LPUART_Enable(LPUART1);

  /* Polling LPUART1 initialisation */
  while((!(LL_LPUART_IsActiveFlag_TEACK(LPUART1))) || (!(LL_LPUART_IsActiveFlag_REACK(LPUART1))))
  {
  }
  /* USER CODE BEGIN LPUART1_Init 2 */

  /* USER CODE END LPUART1_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 */

  LL_RTC_InitTypeDef RTC_InitStruct = {0};
  LL_RTC_TimeTypeDef RTC_TimeStruct = {0};
  LL_RTC_DateTypeDef RTC_DateStruct = {0};
  LL_RTC_AlarmTypeDef RTC_AlarmStruct = {0};

  if(LL_RCC_GetRTCClockSource() != LL_RCC_RTC_CLKSOURCE_LSE)
  {
    if (LL_PWR_IsEnabledBkUpAccess () != 1U)
    {
      /* Enable write access to Backup domain */
      LL_PWR_EnableBkUpAccess();
      while (LL_PWR_IsEnabledBkUpAccess () == 0U)
      {
      }
    }
    LL_RCC_ForceBackupDomainReset();
    LL_RCC_ReleaseBackupDomainReset();
  LL_RCC_LSE_SetDriveCapability(LL_RCC_LSEDRIVE_LOW);
    LL_RCC_LSE_Enable();

   /* Wait till LSE is ready */
    while(LL_RCC_LSE_IsReady() != 1)
    {
    }
  LL_RCC_SetRTCClockSource(LL_RCC_RTC_CLKSOURCE_LSE);
  }

  /* Peripheral clock enable */
  LL_RCC_EnableRTC();

  /* USER CODE BEGIN RTC_Init 1 */

  /* USER CODE END RTC_Init 1 */
  RTC_InitStruct.HourFormat = LL_RTC_HOURFORMAT_24HOUR;
  RTC_InitStruct.AsynchPrescaler = 127;
  RTC_InitStruct.SynchPrescaler = 255;
  LL_RTC_Init(RTC, &RTC_InitStruct);

  /** Initialize RTC and set the Time and Date
  */
  RTC_TimeStruct.Hours = 0x0;
  RTC_TimeStruct.Minutes = 0x0;
  RTC_TimeStruct.Seconds = 0x0;
  LL_RTC_TIME_Init(RTC, LL_RTC_FORMAT_BCD, &RTC_TimeStruct);
  RTC_DateStruct.WeekDay = LL_RTC_WEEKDAY_MONDAY;
  RTC_DateStruct.Month = LL_RTC_MONTH_JANUARY;
  RTC_DateStruct.Day = 0x1;
  RTC_DateStruct.Year = 0x0;
  LL_RTC_DATE_Init(RTC, LL_RTC_FORMAT_BCD, &RTC_DateStruct);

  /** Enable the Alarm A
  */
  RTC_AlarmStruct.AlarmTime.Hours = 0x0;
  RTC_AlarmStruct.AlarmTime.Minutes = 0x0;
  RTC_AlarmStruct.AlarmTime.Seconds = 0x0;
  RTC_AlarmStruct.AlarmMask = LL_RTC_ALMA_MASK_NONE;
  RTC_AlarmStruct.AlarmDateWeekDaySel = LL_RTC_ALMA_DATEWEEKDAYSEL_DATE;
  RTC_AlarmStruct.AlarmDateWeekDay = 0x1;
  LL_RTC_ALMA_Init(RTC, LL_RTC_FORMAT_BCD, &RTC_AlarmStruct);

  /** Enable the Alarm B
  */
  RTC_AlarmStruct.AlarmMask = LL_RTC_ALMB_MASK_NONE;
  RTC_AlarmStruct.AlarmDateWeekDaySel = LL_RTC_ALMB_DATEWEEKDAYSEL_DATE;
  LL_RTC_ALMB_Init(RTC, LL_RTC_FORMAT_BCD, &RTC_AlarmStruct);

  /** Enable the WakeUp
  */
  LL_RTC_WAKEUP_SetClock(RTC, LL_RTC_WAKEUPCLOCK_DIV_16);
  LL_RTC_WAKEUP_SetAutoReload(RTC, 0);
  /* 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)
{
  LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */

  /* GPIO Ports Clock Enable */
  LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOB);
  LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOC);
  LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOH);
  LL_AHB4_GRP1_EnableClock(LL_AHB4_GRP1_PERIPH_GPIOA);

  /**/
  LL_GPIO_ResetOutputPin(LED_GPIO_Port, LED_Pin);

  /**/
  GPIO_InitStruct.Pin = LED_Pin;
  GPIO_InitStruct.Mode = LL_GPIO_MODE_OUTPUT;
  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
  GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
  LL_GPIO_Init(LED_GPIO_Port, &GPIO_InitStruct);

/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/* MPU Configuration */

void MPU_Config(void)
{

  /* Disables the MPU */
  LL_MPU_Disable();

  /** Initializes and configures the Region and the memory to be protected
  */
  LL_MPU_ConfigRegion(LL_MPU_REGION_NUMBER0, 0x87, 0x0, LL_MPU_REGION_SIZE_4GB|LL_MPU_TEX_LEVEL0|LL_MPU_REGION_NO_ACCESS|LL_MPU_INSTRUCTION_ACCESS_DISABLE|LL_MPU_ACCESS_SHAREABLE|LL_MPU_ACCESS_NOT_CACHEABLE|LL_MPU_ACCESS_NOT_BUFFERABLE);
  /* Enables the MPU */
  LL_MPU_Enable(LL_MPU_CTRL_PRIVILEGED_DEFAULT);

}

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  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) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */