無線模塊初始化

為了更好的用戶體驗，思為無線為大家提供LoRa1278無線模塊初始化代碼，希望能為廣大用戶提供幫助。

/** 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;//選擇HSI和LSI時鐘

  RCC_OscInitStruct.HSIState = RCC_HSI_ON; //打開HSI

  RCC_OscInitStruct.HSICalibrationValue = 16; //HSI頻率

  RCC_OscInitStruct.LSIState = RCC_LSI_ON; //打開LSI

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; //時鐘源為HSI

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

  RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;

  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) //初始化，錯誤監(jiān)測

  {

    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; // 設(shè)置系統(tǒng)時鐘源為HSI

  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; //AHB分頻系數(shù)為1

  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; //APB1分頻系數(shù)為1

  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; //APB2分頻系數(shù)為1

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)//配置時鐘，同時設(shè)置FLASH延時周期

  {

    Error_Handler();

  }

  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2; //外設(shè)時鐘使能

  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);

}