Posted by diabolo38 on 2015-11-05 13:05

yes you can do that way
in cubemx project you should get Src\usbd_cdc_if.c
with smthg like

static int8_t CDC_Receive_FS (uint8_t* Buf, uint32_t *Len)
{
/* USER CODE BEGIN 6 */
return (USBD_OK);
/* USER CODE END 6 */
}

you can here pass the data to a task using message queue semaphore etc...
up to you and best suite your need
osSemaphoreRelease(xxx);
osMessagePut(xxx....) cpoudl be easier if to pass the buffer address and or size as the message

if you do not mind not using cmsis os layer then you can use direct freertos
xQueueSendFromISR , xSemaphoreGiveFromISR (save some cycle checkign for isr )

I’m doing that in a usb cdc based project wher i’m also re-arming the reception by call USBD_CDC_ReceivePacket(...)
but do only after setup of a new buffer (do not ovewrite data before it get used by the task)
and make sure not to overflow the task queue or lose any data (if using binary semphore).