After updating STM32Cube FW from F7 1.11.0 to 1.12.0 I encountered some problems with CDC FS on STM32F745VET. Short examples of simple code:
main.h
/* USER CODE BEGIN Private defines */
struct rxDataStruct
{
unsigned char dataReceived;
uint8_t data[25];
};
extern struct rxDataStruct rxData;
/* USER CODE END Private defines */
usbd_cdc_if.c
static int8_t CDC_Receive_FS(uint8_t* Buf, uint32_t *Len)
{
/* USER CODE BEGIN 6 */
USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &Buf[0]);
for (unsigned int i = 0; i < *Len; i++)
{
rxData.data[i] = UserRxBufferFS[i];
}
rxData.dataReceived = 1;
USBD_CDC_ReceivePacket(&hUsbDeviceFS);
return (USBD_OK);
/* USER CODE END 6 */
}
main.c
/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
struct rxDataStruct rxData;
uint8_t REPLY_OK[4] = { 0xFF, 0x04, 0, 0 };
uint8_t captureCompleted = 0;
/* USER CODE END PV */
// ----------------------------------------------------- //
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
if (rxData.dataReceived == 1)
{
captureCompleted = 1;
sendReplyCDC(REPLY_OK, 4);
rxData.dataReceived = 0;
}
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
// --------------------------------------------- //
void sendReplyCDC(uint8_t *reply, uint8_t length)
{
CDC_Transmit_FS(reply, length);
}
With instruction "captureCompleted = 1" in infinite loop, I never receive reply from STM32. If I remove this, I receive reply successfully. I have no this problem with STM32Cube FW_F7 V1.11.0
