Posted on September 26, 2017 at 11:07 Majerle.Tilen
Can you show us your interface file where you call
USBD_CDC_SetRxBuffer function?
Yes.
//usbd_cdc_if.c
...
#define APP_RX_DATA_SIZE 64
#define APP_TX_DATA_SIZE 64
...
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)
{
/* USER CODE BEGIN 3 */
/* Set Application Buffers */
USBD_CDC_SetTxBuffer(&hUsbDeviceFS, UserTxBufferFS, 0);
USBD_CDC_SetRxBuffer(&hUsbDeviceFS, UserRxBufferFS);
return (USBD_OK);
/* USER CODE END 3 */
}
...
static int8_t CDC_Receive_FS (uint8_t* Buf, uint32_t *Len)
{
/* USER CODE BEGIN 6 */
extern osMessageQId QueueUsbvcpRxHandle;
extern osSemaphoreId BinarySemUsbvcpRxReadyHandle;
int i; for(i = 0; i < *Len; i++)
{
osMessagePut(QueueUsbvcpRxHandle, Buf[i], 0);
}
osSemaphoreRelease (BinarySemUsbvcpRxReadyHandle);
return (USBD_OK);
/* USER CODE END 6 */
}
...
void UsbvcpRxStart(void)
{
USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &UserRxBufferFS[0]);
USBD_CDC_ReceivePacket(&hUsbDeviceFS);
}
...
//freertos.c
...
void TaskUsbvcpRx(void const * argument)
{
/* USER CODE BEGIN TaskUsbvcpRx */
/* Infinite loop */
for(;;)
{
if(osSemaphoreWait (BinarySemUsbvcpRxReadyHandle, 10000) != osOK)
{
//fix uart error
}
UsbvcpRxStart();
}
/* USER CODE END TaskUsbvcpRx */
}
...
Above is the code responsible for Rx. Short explanation, the functions SetRxBuffer and ReceivePacket are extracted from the interrupt, because in previous projects (without rtos) it caused a crash because of HAL LOCK macro, when the struct is used at the same time by the interrupt and 'main' when full duplex transmissions occured. The problem described in original post arised there too, but I cant remember how i solved it. Maybe I left it aside and it just dissapeared. Ich checked the code but didn't find anything regarding to this.
