[英]STM32F0 USB CDC_Init_FS() and CDC_Receive_FS() using CubeMX
我正在使用此代码通过USB捕获数据。 收到字符后,顶层代码会使程序崩溃。 底部工作得很好,尽管我无法按需保存数据。 甚至在调用CDC_Receive_FS()
之前,它的顶部崩溃(无休止的循环CDC_Receive_FS()
……这从未被调用过。 底部按预期方式调用CDC_Receive_FS()
。
在我的一生中,我看不到如何调用保存循环循环的缓冲区的结构有什么问题。
/* 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 */
}
这不是:
/* 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);
}
这行(使用此缓冲区)似乎是罪魁祸首:
USBD_CDC_SetRxBuffer(hUsbDevice_0, s_RxBuffers.UserRxBufferFS[s_RxBuffers.Buffer_Number_Receiving] );//Set the buffer to receive incoming data
任何帮助/见解将不胜感激。
我将使Rx_Buffer一维化并分别处理命令历史记录。
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,由于您使用的是结构体(s_RxBuffers类型),我认为您没有以正确的方式将缓冲区作为指针传递给函数。 我认为您应该执行以下操作:
USBD_CDC_SetRxBuffer(hUsbDevice_0, &s_RxBuffers.UserRxBufferFS[0] );//Set the buffer to receive incoming data
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