HAL_GPIO_TogglePin(LED1_GPIO_Port, LED1_Pin);
    /* Insert delay 200 ms */
    HAL_Delay(200);
    HAL_GPIO_TogglePin(LED2_GPIO_Port, LED2_Pin);
    /* Insert delay 200 ms */
    HAL_Delay(200);
    HAL_GPIO_TogglePin(LED3_GPIO_Port, LED3_Pin);
    /* Insert delay 200 ms */
    HAL_Delay(200);
    HAL_GPIO_TogglePin(LED4_GPIO_Port, LED4_Pin);
    /* Insert delay 200 ms */
    HAL_Delay(200);

/**
  * @brief The application entry point.
  * @retval int
  */
int main(void)
{

  /* USER CODE BEGIN 1 */
  /* Enable the CPU Cache */
  /* Enable I-Cache---------------------------------------------------------*/
  SCB_EnableICache();

  /* Enable D-Cache---------------------------------------------------------*/
  SCB_EnableDCache();
  /* USER CODE END 1 */

  /* MPU Configuration--------------------------------------------------------*/
  MPU_Config();

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

  /* Update SystemCoreClock variable according to RCC registers values. */
  SystemCoreClockUpdate();

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

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    HAL_GPIO_TogglePin(LED1_GPIO_Port, LED1_Pin);
    /* Insert delay 200 ms */
    HAL_Delay(200);
    HAL_GPIO_TogglePin(LED2_GPIO_Port, LED2_Pin);
    /* Insert delay 200 ms */
    HAL_Delay(200);
    HAL_GPIO_TogglePin(LED3_GPIO_Port, LED3_Pin);
    /* Insert delay 200 ms */
    HAL_Delay(200);
    HAL_GPIO_TogglePin(LED4_GPIO_Port, LED4_Pin);
    /* Insert delay 200 ms */
    HAL_Delay(200);
    /* USER CODE END WHILE */

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

/**
  * @brief  Configure the time base source, NVIC and any required global low level hardware
  *         by calling the HAL_MspInit() callback function to be optionally defined in user file
  *         stm32h7rsxx_hal_msp.c.
  *
  * @note   HAL_Init() function is called at the beginning of program after reset and before
  *         the clock configuration.
  *
  * @note   In the default implementation the System Timer (Systick) is used as source of time base.
  *         The Systick configuration is based on HSI clock, as HSI is the clock
  *         used after a system Reset and the NVIC configuration is set to Priority group 4.
  *         Once done, time base tick starts incrementing: the tick variable counter is incremented
  *         each 1ms in the SysTick_Handler() interrupt handler.
  *
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_Init(void)
{
  HAL_StatusTypeDef  status = HAL_OK;

  /* Set Interrupt Group Priority */
  HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);

  /* Use SysTick as time base source and configure 1ms tick */
  if (HAL_InitTick(TICK_INT_PRIORITY) != HAL_OK)
  {
    status = HAL_ERROR;
  }
  else
  {
    /* Init the low level hardware */
    HAL_MspInit();
  }

  /* Return function status */
  return status;
}

/**
  * @brief  Update SystemCoreClock variable according to RCC registers values.
  *         The SystemCoreClock variable contains the core clock (sys_cpu_ck), it can
  *         be used by the user application to setup the SysTick timer or configure
  *         other parameters.
  *
  * @note   Each time the core clock changes, this function must be called
  *         to update SystemCoreClock variable value. Otherwise, any configuration
  *         based on this variable will be incorrect.
  *
  * @note   - The system frequency computed by this function is not the real
  *           frequency in the chip. It is calculated based on the predefined
  *           constant and the selected clock source:
  *
  *           - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
  *
  *           - If SYSCLK source is CSI, SystemCoreClock will contain the CSI_VALUE(**)
  *
  *           - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(***)
  *
  *           - If SYSCLK source is PLL, SystemCoreClock will contain the HSI_VALUE(*)
  *             or CSI_VALUE(**) or HSE_VALUE(***) multiplied/divided by the PLL factors.
  *
  *         (*) HSI_VALUE is a constant defined in stm32h7rsxx_hal.h file (default value
  *              64 MHz) but the real value may vary depending on the variations
  *              in voltage and temperature.
  *
  *         (**) CSI_VALUE is a constant defined in stm32h7rsxx_hal.h file (default value
  *             4 MHz) but the real value may vary depending on the variations
  *             in voltage and temperature.
  *
  *         (***) HSE_VALUE is a constant defined in stm32h7rsxx_hal.h file (default value
  *              24 MHz), user has to ensure that HSE_VALUE is same as the real
  *              frequency of the crystal used. Otherwise, this function may
  *              have wrong result.
  *
  *         - The result of this function could be not correct when using fractional
  *           value for HSE crystal.
  *
  * @retval None
  */
void SystemCoreClockUpdate(void)
{
  uint32_t sysclk, hsivalue, pllsource, pllm, pllp, core_presc;
  float_t pllfracn, pllvco;

  /* Get SYSCLK source -------------------------------------------------------*/
  switch (RCC->CFGR & RCC_CFGR_SWS)
  {
  case 0x00:  /* HSI used as system clock source (default after reset) */
    sysclk = (HSI_VALUE >> ((RCC->CR & RCC_CR_HSIDIV) >> RCC_CR_HSIDIV_Pos));
    break;

  case 0x08:  /* CSI used as system clock source */
    sysclk = CSI_VALUE;
    break;

  case 0x10:  /* HSE used as system clock source */
    sysclk = HSE_VALUE;
    break;

  case 0x18:  /* PLL1 used as system clock  source */
    /* PLL1_VCO = (HSE_VALUE or HSI_VALUE or CSI_VALUE/ PLLM) * PLLN
       SYSCLK = PLL1_VCO / PLL1R
       */
    pllsource = (RCC->PLLCKSELR & RCC_PLLCKSELR_PLLSRC);
    pllm = ((RCC->PLLCKSELR & RCC_PLLCKSELR_DIVM1) >> RCC_PLLCKSELR_DIVM1_Pos)  ;
    if ((RCC->PLLCFGR & RCC_PLLCFGR_PLL1FRACEN) != 0U)
    {
      pllfracn = (float_t)(uint32_t)(((RCC->PLL1FRACR & RCC_PLL1FRACR_FRACN)>> RCC_PLL1FRACR_FRACN_Pos));
    }
    else
    {
      pllfracn = (float_t)0U;
    }

    if (pllm != 0U)
    {
      switch (pllsource)
      {
      case 0x02:  /* HSE used as PLL1 clock source */
        pllvco = ((float_t)HSE_VALUE / (float_t)pllm) * ((float_t)(uint32_t)(RCC->PLL1DIVR1 & RCC_PLL1DIVR1_DIVN) + (pllfracn/(float_t)0x2000) +(float_t)1 );
        break;

      case 0x01:  /* CSI used as PLL1 clock source */
        pllvco = ((float_t)CSI_VALUE / (float_t)pllm) * ((float_t)(uint32_t)(RCC->PLL1DIVR1 & RCC_PLL1DIVR1_DIVN) + (pllfracn/(float_t)0x2000) +(float_t)1 );
        break;

      case 0x00:  /* HSI used as PLL1 clock source */
      default:
        hsivalue = (HSI_VALUE >> ((RCC->CR & RCC_CR_HSIDIV) >> RCC_CR_HSIDIV_Pos));
        pllvco = ( (float_t)hsivalue / (float_t)pllm) * ((float_t)(uint32_t)(RCC->PLL1DIVR1 & RCC_PLL1DIVR1_DIVN) + (pllfracn/(float_t)0x2000) +(float_t)1 );
        break;
      }
      pllp = (((RCC->PLL1DIVR1 & RCC_PLL1DIVR1_DIVP) >> RCC_PLL1DIVR1_DIVP_Pos) + 1U ) ;
      sysclk =  (uint32_t)(float_t)(pllvco/(float_t)pllp);
    }
    else
    {
      sysclk = 0U;
    }
    break;

  default:  /* Unexpected, default to HSI used as system clock source (default after reset) */
    sysclk = (HSI_VALUE >> ((RCC->CR & RCC_CR_HSIDIV) >> RCC_CR_HSIDIV_Pos));
    break;
  }

  /* system clock frequency : CM7 CPU frequency  */
  core_presc = (RCC->CDCFGR & RCC_CDCFGR_CPRE);
  if (core_presc >= 8U)
  {
    SystemCoreClock = (sysclk >> (core_presc - RCC_CDCFGR_CPRE_3 + 1U));
  }
  else
  {
    SystemCoreClock = sysclk;
  }
}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOM_CLK_ENABLE();
  __HAL_RCC_GPIOD_CLK_ENABLE();
  __HAL_RCC_GPIOO_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOM, LED4_Pin|LED3_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOO, LED1_Pin|LED2_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pins : LED4_Pin LED3_Pin */
  GPIO_InitStruct.Pin = LED4_Pin|LED3_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOM, &GPIO_InitStruct);

  /*Configure GPIO pin : PD0 */
  GPIO_InitStruct.Pin = GPIO_PIN_0;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF8_UART4;
  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);

  /*Configure GPIO pins : LED1_Pin LED2_Pin */
  GPIO_InitStruct.Pin = LED1_Pin|LED2_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOO, &GPIO_InitStruct);

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

/** 
  * @brief GPIO Init structure definition  
  */ 
typedef struct
{
  uint32_t Pin;       /*!< Specifies the GPIO pins to be configured.
                           This parameter can be any value of [url=home.php?mod=space&uid=1064992]@ref[/url] GPIO_pins_define */
  uint32_t Mode;      /*!< Specifies the operating mode for the selected pins.
                           This parameter can be a value of @ref GPIO_mode_define */
  uint32_t Pull;      /*!< Specifies the Pull-up or Pull-Down activation for the selected pins.
                           This parameter can be a value of @ref GPIO_pull_define */
  uint32_t Speed;     /*!< Specifies the speed for the selected pins.
                           This parameter can be a value of @ref GPIO_speed_define */
  uint32_t Alternate;  /*!< Peripheral to be connected to the selected pins. 
                            This parameter can be a value of @ref GPIO_Alternate_function_selection */
}GPIO_InitTypeDef;

  while (1)
  {
    HAL_GPIO_TogglePin(LED1_GPIO_Port, LED1_Pin);
    /* Insert delay 200 ms */
    HAL_Delay(200);
    HAL_GPIO_TogglePin(LED2_GPIO_Port, LED2_Pin);
    /* Insert delay 200 ms */
    HAL_Delay(200);
    HAL_GPIO_TogglePin(LED3_GPIO_Port, LED3_Pin);
    /* Insert delay 200 ms */
    HAL_Delay(200);
    HAL_GPIO_TogglePin(LED4_GPIO_Port, LED4_Pin);
    /* Insert delay 200 ms */
    HAL_Delay(200);
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }