使用CubeMX的STM32F0 USB CDC_Init_FS（）和CDC_Receive_FS（）

Question

我正在使用此代碼通過USB捕獲數據。 收到字符后，頂層代碼會使程序崩潰。 底部工作得很好，盡管我無法按需保存數據。 甚至在調用CDC_Receive_FS()之前，它的頂部崩潰（無休止的循環CDC_Receive_FS() ……這從未被調用過。 底部按預期方式調用CDC_Receive_FS() 。

在我的一生中，我看不到如何調用保存循環循環的緩沖區的結構有什么問題。

/* Send Data over USB CDC are stored in this buffer       */
uint8_t UserTxBufferFS[APP_TX_DATA_SIZE];

#define  MAX_COMMANDS_IN_BUFFER 10 //max commands that can be received and saved without overwriting. Each command has a max size of APP_RX_DATA_SIZE

/* Define size for the receive and transmit buffer over CDC */
/* It's up to user to redefine and/or remove those define */
#define APP_RX_DATA_SIZE  256
#define APP_TX_DATA_SIZE  256
uint8_t UserTxBufferFS[APP_TX_DATA_SIZE];

 static struct
  {
  uint32_t Buffer_Number_Receiving, Buffer_Number_Processing;        //Buffer_Number_Receiving is the current position in buffer to receive incoming data. Buffer_Number_Processing is the index of buffer which is being processed.
  uint8_t IsCommandDataReceived; // > 0 , data were received. 0 means no data is available
  uint8_t UserRxBufferFS[MAX_COMMANDS_IN_BUFFER][APP_RX_DATA_SIZE];//it could save <MaxCommandsInBuffer> number of commands
  uint8_t CommandsLens[MAX_COMMANDS_IN_BUFFER]; //save the len of each command
 } s_RxBuffers;

static int8_t CDC_Init_FS(void)
{

  hUsbDevice_0 = &hUsbDeviceFS;
  /* USER CODE BEGIN 3 */
  /* Set Application Buffers */
  USBD_CDC_SetTxBuffer(hUsbDevice_0, UserTxBufferFS, 0);
  USBD_CDC_SetRxBuffer(hUsbDevice_0, s_RxBuffers.UserRxBufferFS[s_RxBuffers.Buffer_Number_Receiving] );//Set the buffer to receive incoming data
  USBD_CDC_ReceivePacket(hUsbDevice_0);
  return (USBD_OK);
  /* USER CODE END 3 */
}

這不是：

/* Received Data over USB are stored in this buffer       */
uint8_t UserRxBufferFS[APP_RX_DATA_SIZE];

/* Send Data over USB CDC are stored in this buffer       */
uint8_t UserTxBufferFS[APP_TX_DATA_SIZE];

static int8_t CDC_Init_FS(void)
{
  hUsbDevice_0 = &hUsbDeviceFS;
  /* USER CODE BEGIN 3 */
  /* Set Application Buffers */
  USBD_CDC_SetTxBuffer(hUsbDevice_0, UserTxBufferFS, 0);
  USBD_CDC_SetRxBuffer(hUsbDevice_0, UserRxBufferFS);
  USBD_CDC_ReceivePacket(hUsbDevice_0);
  return (USBD_OK);
}

環

這行（使用此緩沖區）似乎是罪魁禍首：

 USBD_CDC_SetRxBuffer(hUsbDevice_0, s_RxBuffers.UserRxBufferFS[s_RxBuffers.Buffer_Number_Receiving] );//Set the buffer to receive incoming data

任何幫助/見解將不勝感激。

Answer 1

我將使Rx_Buffer一維化並分別處理命令歷史記錄。

static struct
  {
  uint32_t Buffer_Number_Receiving, Buffer_Number_Processing;        //Buffer_Number_Receiving is the current position in buffer to receive incoming data. Buffer_Number_Processing is the index of buffer which is being processed.
  uint8_t IsCommandDataReceived; // > 0 , data were received. 0 means no data is available
  uint8_t UserRxBufferFS[APP_RX_DATA_SIZE];
  uint8_t CommandsLens[MAX_COMMANDS_IN_BUFFER]; //save the len of each command


} s_RxBuffers;

除此之外，由於您使用的是結構體（s_RxBuffers類型），我認為您沒有以正確的方式將緩沖區作為指針傳遞給函數。 我認為您應該執行以下操作：

USBD_CDC_SetRxBuffer(hUsbDevice_0, &s_RxBuffers.UserRxBufferFS[0] );//Set the buffer to receive incoming data