分享经验：STM32G4驱动CC1101，UART_DMA接收数据回显并SPI转发

1万 · 2021-11-29 23:48

#申请原创# @21小跑堂

游客，如果您要查看本帖隐藏内容请回复

cubeMX配置如下
GPIO

LPUART1

SPI2

HAL_UART_Receive_DMA(&hlpuart1,dat,BUFFERSIZE);
__HAL_UART_ENABLE_IT(&hlpuart1,UART_IT_IDLE);

启动UART的DMA接收，并使能空闲中断，确保在接收完一组数据后，虽然没满，仍然能响应接收到的任意长信息。不过这个任意长是要小于缓存区的最大值的。
不然就没法使用库函数了。

复制

 if(dat[0])

        {

                CC1101_Tx_Packet(dat,len, ADDRESS_CHECK );



                for(i=0;i<len;i++)

                        dat[i]=0;

        }

判断缓冲区的第一个位置是否有字符，如果有就通过SPI2上连接的CC1101发送出去，并清空缓冲区，确保每次串口发来的数据，只转发一次。

复制

void LPUART1_IRQHandler(void)

{

  /* USER CODE BEGIN LPUART1_IRQn 0 */

        if(__HAL_UART_GET_FLAG(&hlpuart1,UART_FLAG_IDLE))

        {

                __HAL_UART_CLEAR_IDLEFLAG(&hlpuart1);

                HAL_UART_DMAStop(&hlpuart1);

                len=BUFFERSIZE-__HAL_DMA_GET_COUNTER(hlpuart1.hdmarx);

                HAL_UART_Transmit_DMA(&hlpuart1,dat,len);

                HAL_UART_Receive_DMA(&hlpuart1,dat,BUFFERSIZE);

                HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);

        }

  /* USER CODE END LPUART1_IRQn 0 */

  HAL_UART_IRQHandler(&hlpuart1);

  /* USER CODE BEGIN LPUART1_IRQn 1 */



  /* USER CODE END LPUART1_IRQn 1 */

}

在串口中断中处理串口空闲中断，读取接收到的实际字符长度，并将收到的这串字符通过UART DMA回显，以便调试过程中查看是否真的发送成功。
并重新启动新的串口DMA接收，翻转LED。

复制

 if(HAL_GPIO_ReadPin(B1_GPIO_Port,B1_Pin))

        {

                CC1101_Tx_Packet((uint8_t *)"TEST\n" ,5, ADDRESS_CHECK );

                HAL_Delay(500);

        }

通过扫描按键触发测试信息发送。
大家也可以下载附件，改成中断触发的。这样会响应更加及时。
main.c

复制

/* USER CODE BEGIN Header */

/**

  ******************************************************************************

  * [url=home.php?mod=space&uid=288409]@file[/url]           : main.c

  * [url=home.php?mod=space&uid=247401]@brief[/url]          : Main program body

  ******************************************************************************

  * @attention

  *

  * <h2><center>© Copyright (c) 2021 STMicroelectronics.

  * All rights reserved.</center></h2>

  *

  * This software component is licensed by ST under BSD 3-Clause license,

  * the "License"; You may not use this file except in compliance with the

  * License. You may obtain a copy of the License at:

  *                        opensource.org/licenses/BSD-3-Clause

  *

  ******************************************************************************

  */

/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/

#include "main.h"



/* Private includes ----------------------------------------------------------*/

/* USER CODE BEGIN Includes */

#include "drv_CC1101.h"

#include "string.h"

/* USER CODE END Includes */



/* Private typedef -----------------------------------------------------------*/

/* USER CODE BEGIN PTD */



/* USER CODE END PTD */



/* Private define ------------------------------------------------------------*/

/* USER CODE BEGIN PD */



#define BUFFERSIZE 255



/* USER CODE END PD */



/* Private macro -------------------------------------------------------------*/

/* USER CODE BEGIN PM */



/* USER CODE END PM */



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

UART_HandleTypeDef hlpuart1;

DMA_HandleTypeDef hdma_lpuart1_rx;

DMA_HandleTypeDef hdma_lpuart1_tx;



SPI_HandleTypeDef hspi2;



/* USER CODE BEGIN PV */



/* USER CODE END PV */



/* Private function prototypes -----------------------------------------------*/

void SystemClock_Config(void);

static void MX_GPIO_Init(void);

static void MX_DMA_Init(void);

static void MX_LPUART1_UART_Init(void);

static void MX_SPI2_Init(void);

/* USER CODE BEGIN PFP */

uint8_t dat[BUFFERSIZE];

extern uint8_t len;

/* USER CODE END PFP */



/* Private user code ---------------------------------------------------------*/

/* USER CODE BEGIN 0 */

void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)

{

//        HAL_UART_Receive_DMA(&hlpuart1,dat,10);

//        HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin,GPIO_PIN_RESET);

//                HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);

}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)

{

//        HAL_UART_Transmit_DMA(&hlpuart1,dat,strlen((char *)dat));

//        HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin,GPIO_PIN_SET);

//                HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);        

}

/* USER CODE END 0 */



/**

  * @brief  The application entry point.

  * @retval int

  */

int main(void)

{

  /* USER CODE BEGIN 1 */

        uint8_t i=0;

  /* 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_DMA_Init();

  MX_LPUART1_UART_Init();

  MX_SPI2_Init();

  /* USER CODE BEGIN 2 */

//        HAL_UART_Transmit_DMA(&hlpuart1,(uint8_t *)"Hello",5);

        HAL_UART_Receive_DMA(&hlpuart1,dat,BUFFERSIZE);        

        __HAL_UART_ENABLE_IT(&hlpuart1,UART_IT_IDLE);



        CC1101_Init();





  /* USER CODE END 2 */



  /* Infinite loop */

  /* USER CODE BEGIN WHILE */

  while (1)

  {

//将dat中从串口接收的数据通过cc1101转发出去，并清空dat,确保dat每次接收到的数据只发送一次。

        if(dat[0])

        {

                CC1101_Tx_Packet(dat,len, ADDRESS_CHECK );



                for(i=0;i<len;i++)

                        dat[i]=0;

        }



//                HAL_Delay(2000);



        if(HAL_GPIO_ReadPin(B1_GPIO_Port,B1_Pin))

        {

                CC1101_Tx_Packet((uint8_t *)"TEST\n" ,5, ADDRESS_CHECK );

                HAL_Delay(500);

        }

        

        

    /* USER CODE END WHILE */



    /* USER CODE BEGIN 3 */

  }

  /* USER CODE END 3 */

}



/**

  * @brief System Clock Configuration

  * @retval None

  */

void SystemClock_Config(void)

{

  RCC_OscInitTypeDef RCC_OscInitStruct = {0};

  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};



  /** Configure the main internal regulator output voltage

  */

  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);

  /** Initializes the RCC Oscillators according to the specified parameters

  * in the RCC_OscInitTypeDef structure.

  */

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;

  RCC_OscInitStruct.HSIState = RCC_HSI_ON;

  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;

  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_CLOCKTYPE_PCLK2;

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;

  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;



  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)

  {

    Error_Handler();

  }

  /** Initializes the peripherals clocks

  */

  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_LPUART1;

  PeriphClkInit.Lpuart1ClockSelection = RCC_LPUART1CLKSOURCE_PCLK1;

  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)

  {

    Error_Handler();

  }

}



/**

  * @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 */



  /* USER CODE BEGIN LPUART1_Init 1 */



  /* USER CODE END LPUART1_Init 1 */

  hlpuart1.Instance = LPUART1;

  hlpuart1.Init.BaudRate = 115200;

  hlpuart1.Init.WordLength = UART_WORDLENGTH_8B;

  hlpuart1.Init.StopBits = UART_STOPBITS_1;

  hlpuart1.Init.Parity = UART_PARITY_NONE;

  hlpuart1.Init.Mode = UART_MODE_TX_RX;

  hlpuart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;

  hlpuart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;

  hlpuart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;

  hlpuart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;

  if (HAL_UART_Init(&hlpuart1) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_UARTEx_SetTxFifoThreshold(&hlpuart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_UARTEx_SetRxFifoThreshold(&hlpuart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_UARTEx_DisableFifoMode(&hlpuart1) != HAL_OK)

  {

    Error_Handler();

  }

  /* USER CODE BEGIN LPUART1_Init 2 */



  /* USER CODE END LPUART1_Init 2 */



}



/**

  * @brief SPI2 Initialization Function

  * @param None

  * @retval None

  */

static void MX_SPI2_Init(void)

{



  /* USER CODE BEGIN SPI2_Init 0 */



  /* USER CODE END SPI2_Init 0 */



  /* USER CODE BEGIN SPI2_Init 1 */



  /* USER CODE END SPI2_Init 1 */

  /* SPI2 parameter configuration*/

  hspi2.Instance = SPI2;

  hspi2.Init.Mode = SPI_MODE_MASTER;

  hspi2.Init.Direction = SPI_DIRECTION_2LINES;

  hspi2.Init.DataSize = SPI_DATASIZE_8BIT;

  hspi2.Init.CLKPolarity = SPI_POLARITY_LOW;

  hspi2.Init.CLKPhase = SPI_PHASE_1EDGE;

  hspi2.Init.NSS = SPI_NSS_SOFT;

  hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_16;

  hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;

  hspi2.Init.TIMode = SPI_TIMODE_DISABLE;

  hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;

  hspi2.Init.CRCPolynomial = 7;

  hspi2.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;

  hspi2.Init.NSSPMode = SPI_NSS_PULSE_ENABLE;

  if (HAL_SPI_Init(&hspi2) != HAL_OK)

  {

    Error_Handler();

  }

  /* USER CODE BEGIN SPI2_Init 2 */



  /* USER CODE END SPI2_Init 2 */



}



/**

  * Enable DMA controller clock

  */

static void MX_DMA_Init(void)

{



  /* DMA controller clock enable */

  __HAL_RCC_DMAMUX1_CLK_ENABLE();

  __HAL_RCC_DMA1_CLK_ENABLE();



  /* DMA interrupt init */

  /* DMA1_Channel1_IRQn interrupt configuration */

  HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);

  HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);

  /* DMA1_Channel2_IRQn interrupt configuration */

  HAL_NVIC_SetPriority(DMA1_Channel2_IRQn, 0, 0);

  HAL_NVIC_EnableIRQ(DMA1_Channel2_IRQn);



}



/**

  * @brief GPIO Initialization Function

  * @param None

  * @retval None

  */

static void MX_GPIO_Init(void)

{

  GPIO_InitTypeDef GPIO_InitStruct = {0};



  /* GPIO Ports Clock Enable */

  __HAL_RCC_GPIOC_CLK_ENABLE();

  __HAL_RCC_GPIOF_CLK_ENABLE();

  __HAL_RCC_GPIOA_CLK_ENABLE();

  __HAL_RCC_GPIOB_CLK_ENABLE();



  /*Configure GPIO pin Output Level */

  HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);



  /*Configure GPIO pin Output Level */

  HAL_GPIO_WritePin(SPI_NSS_GPIO_Port, SPI_NSS_Pin, GPIO_PIN_RESET);



  /*Configure GPIO pin : B1_Pin */

  GPIO_InitStruct.Pin = B1_Pin;

  GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);



  /*Configure GPIO pin : LD2_Pin */

  GPIO_InitStruct.Pin = LD2_Pin;

  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

  HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct);



  /*Configure GPIO pin : SPI_NSS_Pin */

  GPIO_InitStruct.Pin = SPI_NSS_Pin;

  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

  HAL_GPIO_Init(SPI_NSS_GPIO_Port, &GPIO_InitStruct);



  /*Configure GPIO pins : GOD0_Pin GOD2_Pin */

  GPIO_InitStruct.Pin = GOD0_Pin|GOD2_Pin;

  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;

  GPIO_InitStruct.Pull = GPIO_PULLUP;

  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);



}



/* USER CODE BEGIN 4 */



/* 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 */

  /* 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 */



/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

中断文件

复制

/* USER CODE BEGIN Header */

/**

  ******************************************************************************

  * @file    stm32g4xx_it.c

  * @brief   Interrupt Service Routines.

  ******************************************************************************

  * @attention

  *

  * <h2><center>© Copyright (c) 2021 STMicroelectronics.

  * All rights reserved.</center></h2>

  *

  * This software component is licensed by ST under BSD 3-Clause license,

  * the "License"; You may not use this file except in compliance with the

  * License. You may obtain a copy of the License at:

  *                        opensource.org/licenses/BSD-3-Clause

  *

  ******************************************************************************

  */

/* USER CODE END Header */



/* Includes ------------------------------------------------------------------*/

#include "main.h"

#include "stm32g4xx_it.h"

/* Private includes ----------------------------------------------------------*/

/* USER CODE BEGIN Includes */

/* USER CODE END Includes */



/* Private typedef -----------------------------------------------------------*/

/* USER CODE BEGIN TD */



/* USER CODE END TD */



/* Private define ------------------------------------------------------------*/

/* USER CODE BEGIN PD */

#define BUFFERSIZE 255

/* 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 -----------------------------------------------*/

/* USER CODE BEGIN PFP */



/* USER CODE END PFP */



/* Private user code ---------------------------------------------------------*/

/* USER CODE BEGIN 0 */

        uint8_t len;

        extern uint8_t dat[BUFFERSIZE];

/* USER CODE END 0 */



/* External variables --------------------------------------------------------*/

extern DMA_HandleTypeDef hdma_lpuart1_rx;

extern DMA_HandleTypeDef hdma_lpuart1_tx;

extern UART_HandleTypeDef hlpuart1;

/* USER CODE BEGIN EV */



/* USER CODE END EV */



/******************************************************************************/

/*           Cortex-M4 Processor Interruption and Exception Handlers          */

/******************************************************************************/

/**

  * @brief This function handles Non maskable interrupt.

  */

void NMI_Handler(void)

{

  /* USER CODE BEGIN NonMaskableInt_IRQn 0 */



  /* USER CODE END NonMaskableInt_IRQn 0 */

  /* USER CODE BEGIN NonMaskableInt_IRQn 1 */

  while (1)

  {

  }

  /* USER CODE END NonMaskableInt_IRQn 1 */

}



/**

  * @brief This function handles Hard fault interrupt.

  */

void HardFault_Handler(void)

{

  /* USER CODE BEGIN HardFault_IRQn 0 */



  /* USER CODE END HardFault_IRQn 0 */

  while (1)

  {

    /* USER CODE BEGIN W1_HardFault_IRQn 0 */

    /* USER CODE END W1_HardFault_IRQn 0 */

  }

}



/**

  * @brief This function handles Memory management fault.

  */

void MemManage_Handler(void)

{

  /* USER CODE BEGIN MemoryManagement_IRQn 0 */



  /* USER CODE END MemoryManagement_IRQn 0 */

  while (1)

  {

    /* USER CODE BEGIN W1_MemoryManagement_IRQn 0 */

    /* USER CODE END W1_MemoryManagement_IRQn 0 */

  }

}



/**

  * @brief This function handles Prefetch fault, memory access fault.

  */

void BusFault_Handler(void)

{

  /* USER CODE BEGIN BusFault_IRQn 0 */



  /* USER CODE END BusFault_IRQn 0 */

  while (1)

  {

    /* USER CODE BEGIN W1_BusFault_IRQn 0 */

    /* USER CODE END W1_BusFault_IRQn 0 */

  }

}



/**

  * @brief This function handles Undefined instruction or illegal state.

  */

void UsageFault_Handler(void)

{

  /* USER CODE BEGIN UsageFault_IRQn 0 */



  /* USER CODE END UsageFault_IRQn 0 */

  while (1)

  {

    /* USER CODE BEGIN W1_UsageFault_IRQn 0 */

    /* USER CODE END W1_UsageFault_IRQn 0 */

  }

}



/**

  * @brief This function handles System service call via SWI instruction.

  */

void SVC_Handler(void)

{

  /* USER CODE BEGIN SVCall_IRQn 0 */



  /* USER CODE END SVCall_IRQn 0 */

  /* USER CODE BEGIN SVCall_IRQn 1 */



  /* USER CODE END SVCall_IRQn 1 */

}



/**

  * @brief This function handles Debug monitor.

  */

void DebugMon_Handler(void)

{

  /* USER CODE BEGIN DebugMonitor_IRQn 0 */



  /* USER CODE END DebugMonitor_IRQn 0 */

  /* USER CODE BEGIN DebugMonitor_IRQn 1 */



  /* USER CODE END DebugMonitor_IRQn 1 */

}



/**

  * @brief This function handles Pendable request for system service.

  */

void PendSV_Handler(void)

{

  /* USER CODE BEGIN PendSV_IRQn 0 */



  /* USER CODE END PendSV_IRQn 0 */

  /* USER CODE BEGIN PendSV_IRQn 1 */



  /* USER CODE END PendSV_IRQn 1 */

}



/**

  * @brief This function handles System tick timer.

  */

void SysTick_Handler(void)

{

  /* USER CODE BEGIN SysTick_IRQn 0 */



  /* USER CODE END SysTick_IRQn 0 */

  HAL_IncTick();

  /* USER CODE BEGIN SysTick_IRQn 1 */



  /* USER CODE END SysTick_IRQn 1 */

}



/******************************************************************************/

/* STM32G4xx Peripheral Interrupt Handlers                                    */

/* Add here the Interrupt Handlers for the used peripherals.                  */

/* For the available peripheral interrupt handler names,                      */

/* please refer to the startup file (startup_stm32g4xx.s).                    */

/******************************************************************************/



/**

  * @brief This function handles DMA1 channel1 global interrupt.

  */

void DMA1_Channel1_IRQHandler(void)

{

  /* USER CODE BEGIN DMA1_Channel1_IRQn 0 */



  /* USER CODE END DMA1_Channel1_IRQn 0 */

  HAL_DMA_IRQHandler(&hdma_lpuart1_rx);

  /* USER CODE BEGIN DMA1_Channel1_IRQn 1 */



  /* USER CODE END DMA1_Channel1_IRQn 1 */

}



/**

  * @brief This function handles DMA1 channel2 global interrupt.

  */

void DMA1_Channel2_IRQHandler(void)

{

  /* USER CODE BEGIN DMA1_Channel2_IRQn 0 */



  /* USER CODE END DMA1_Channel2_IRQn 0 */

  HAL_DMA_IRQHandler(&hdma_lpuart1_tx);

  /* USER CODE BEGIN DMA1_Channel2_IRQn 1 */



  /* USER CODE END DMA1_Channel2_IRQn 1 */

}



/**

  * @brief This function handles LPUART1 global interrupt.

  */

void LPUART1_IRQHandler(void)

{

  /* USER CODE BEGIN LPUART1_IRQn 0 */

        if(__HAL_UART_GET_FLAG(&hlpuart1,UART_FLAG_IDLE))

        {

                __HAL_UART_CLEAR_IDLEFLAG(&hlpuart1);

                HAL_UART_DMAStop(&hlpuart1);

                len=BUFFERSIZE-__HAL_DMA_GET_COUNTER(hlpuart1.hdmarx);

                HAL_UART_Transmit_DMA(&hlpuart1,dat,len);

                HAL_UART_Receive_DMA(&hlpuart1,dat,BUFFERSIZE);

                HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);

        }

  /* USER CODE END LPUART1_IRQn 0 */

  HAL_UART_IRQHandler(&hlpuart1);

  /* USER CODE BEGIN LPUART1_IRQn 1 */



  /* USER CODE END LPUART1_IRQn 1 */

}



/* USER CODE BEGIN 1 */



/* USER CODE END 1 */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/