Posted on August 02, 2016 at 11:43
I'm developing a USB composite device with the Nucleo-F446ZE.
I'm adding a Virtual com port and I have some trouble to send back data.
I receive everything from the computer but when I try to send back something it work only once. Then the EP->xfer_count is still at zeroand HAL status is always 0.
//usbd_conf.c
HAL_PCDEx_SetRxFiFo(&hpcd, 0x40);
HAL_PCDEx_SetTxFiFo(&hpcd, 0, 0x20);
HAL_PCDEx_SetTxFiFo(&hpcd, 1, 0x20);
HAL_PCDEx_SetTxFiFo(&hpcd, 2, 0x10);
HAL_PCDEx_SetTxFiFo(&hpcd, 3, 0x20);
HAL_PCDEx_SetTxFiFo(&hpcd, 4, 0x10);
HAL_PCDEx_SetTxFiFo(&hpcd, 5, 0x20);
//init
USBD_LL_OpenEP(pdev,
CDC_IN_EP,
//0x85
USBD_EP_TYPE_BULK,
CDC_DATA_FS_MAX_PACKET_SIZE);
//64
USBD_LL_OpenEP(pdev,
CDC_OUT_EP,
//0x03
USBD_EP_TYPE_BULK,
CDC_DATA_FS_MAX_PACKET_SIZE);
//64
//The receive/send back function
dataLen = USBD_GetRxCount (pdev, epnum);
Hstatus = HAL_PCD_EP_Transmit(pdev->pData, CDC_IN_EP, VCP_recv, dataLen);
HAL_PCD_EP_Receive (pdev->pData,
CDC_OUT_EP,
VCP_recv,
CCID_BULK_EPOUT_SIZE);
