Posted on April 11, 2017 at 07:41
I have generated a project for USB CDC VCP using CubeMX and HAL and now I am trying to figure out how I can implement these two weak functions:
void HAL_PCD_DataInStageCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
void HAL_PCD_DataOutStageCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)�?�?
These fuctions will be called inside HAL_PCD_IRQHandler. What I want to do is place some code inside them so I can retrive received data from host and also find out about end of transaction.
I have seen that CubeMX has reimplemented these weak functions inside usbd_conf.c like this:
/**
* @brief Data Out stage callback.
* @param hpcd: PCD handle
* @param epnum: Endpoint Number
* @retval None
*/
void HAL_PCD_DataOutStageCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
{
USBD_LL_DataOutStage((USBD_HandleTypeDef*)hpcd->pData, epnum, hpcd->OUT_ep[epnum].xfer_buff);
}
/**
* @brief Data In stage callback..
* @param hpcd: PCD handle
* @param epnum: Endpoint Number
* @retval None
*/
void HAL_PCD_DataInStageCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
{
USBD_LL_DataInStage((USBD_HandleTypeDef*)hpcd->pData, epnum, hpcd->IN_ep[epnum].xfer_buff);
}�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?
I am wondered to know what do these two functions (USBD_LL_DataOutStage and USBD_LL_DataInStage) do? And how I can edit them to achieve my goal.
#hal #usb #cdc
