LoRa module initialization

For a better user experience, NiceRF provides you with the initialization code of the LoRa module LoRa1278, hoping to provide help to the majority of users.

/** System Clock Configuration

*/

Void SystemClock_Config(void)

{

  RCC_OscInitTypeDef RCC_OscInitStruct;

  RCC_ClkInitTypeDef RCC_ClkInitStruct;

  RCC_PeriphCLKInitTypeDef PeriphClkInit;

/**Configure the main internal regulator output voltage

*/

__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

/**Initializes the CPU, AHB and APB busses clocks

*/

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_LSI; //Select HSI and LSI clock

  RCC_OscInitStruct.HSIState = RCC_HSI_ON;  //Open HSI

  RCC_OscInitStruct.HSICalibrationValue = 16;  //HSI frequency

  RCC_OscInitStruct.LSIState = RCC_LSI_ON;  //Open LSI

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;  //The clock source is HSI

  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_4;  //PLL multiplier

  RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;

  If (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)  //Initialization, error monitoring

  {

    Error_Handler();

  }

 /**Initializes the CPU, AHB and APB busses clocks

    */

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK

                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // Set the system clock source to HSI

  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; //AHB division factor is 1

  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; //APB1 division factor is 1

  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; //APB2 division factor is 1

  If (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)//Configure the clock and set the FLASH delay period at the same time

  {

    Error_Handler();

  }

  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2; // peripheral clock enable

  PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;

  If (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)

  {

    Error_Handler();

  }

  /**Configure the Systick interrupt time

    */

  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

 /**Configure the Systick

    */

  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

  /* SysTick_IRQn interrupt configuration */

  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);

}