Question
STM32F767 USB HS with internal phy and internal USB DMA not working
I'm using STM32F767ZI MCU.
I'm trying to use the USB HS device with internal phy (in FS mode), while using the dedicated USB DMA, and it is not working.
I'm using CDC (VCP) device class, and the MCU only sends data over the VCP Tx (no data received over VCP).
It seems that with USB DMA enabled, the USB device is stuck in BUSY state.
The moment I disable the DMA, everything works OK.
should the USB DMA work with the internal phy in FS mode?
should I call anything else except CDC_Transmit_HS() to clear the DMA state?
is there any reference example of such a use case?
The USBD configuration (auto-generated by Cube):
USBD_StatusTypeDef USBD_LL_Init(USBD_HandleTypeDef *pdev)
{
/* Init USB Ip. */
if (pdev->id == DEVICE_HS) {
/* Link the driver to the stack. */
hpcd_USB_OTG_HS.pData = pdev;
pdev->pData = &hpcd_USB_OTG_HS;
hpcd_USB_OTG_HS.Instance = USB_OTG_HS;
hpcd_USB_OTG_HS.Init.dev_endpoints = 9;
hpcd_USB_OTG_HS.Init.speed = PCD_SPEED_FULL;
hpcd_USB_OTG_HS.Init.dma_enable = ENABLE;
hpcd_USB_OTG_HS.Init.phy_itface = USB_OTG_EMBEDDED_PHY;
hpcd_USB_OTG_HS.Init.Sof_enable = DISABLE;
hpcd_USB_OTG_HS.Init.low_power_enable = DISABLE;
hpcd_USB_OTG_HS.Init.lpm_enable = DISABLE;
hpcd_USB_OTG_HS.Init.vbus_sensing_enable = DISABLE;
hpcd_USB_OTG_HS.Init.use_dedicated_ep1 = DISABLE;
hpcd_USB_OTG_HS.Init.use_external_vbus = DISABLE;
if (HAL_PCD_Init(&hpcd_USB_OTG_HS) != HAL_OK)
{
Error_Handler( );
}
#if (USE_HAL_PCD_REGISTER_CALLBACKS == 1U)
/* Register USB PCD CallBacks */
HAL_PCD_RegisterCallback(&hpcd_USB_OTG_HS, HAL_PCD_SOF_CB_ID, PCD_SOFCallback);
HAL_PCD_RegisterCallback(&hpcd_USB_OTG_HS, HAL_PCD_SETUPSTAGE_CB_ID, PCD_SetupStageCallback);
HAL_PCD_RegisterCallback(&hpcd_USB_OTG_HS, HAL_PCD_RESET_CB_ID, PCD_ResetCallback);
HAL_PCD_RegisterCallback(&hpcd_USB_OTG_HS, HAL_PCD_SUSPEND_CB_ID, PCD_SuspendCallback);
HAL_PCD_RegisterCallback(&hpcd_USB_OTG_HS, HAL_PCD_RESUME_CB_ID, PCD_ResumeCallback);
HAL_PCD_RegisterCallback(&hpcd_USB_OTG_HS, HAL_PCD_CONNECT_CB_ID, PCD_ConnectCallback);
HAL_PCD_RegisterCallback(&hpcd_USB_OTG_HS, HAL_PCD_DISCONNECT_CB_ID, PCD_DisconnectCallback);
HAL_PCD_RegisterDataOutStageCallback(&hpcd_USB_OTG_HS, PCD_DataOutStageCallback);
HAL_PCD_RegisterDataInStageCallback(&hpcd_USB_OTG_HS, PCD_DataInStageCallback);
HAL_PCD_RegisterIsoOutIncpltCallback(&hpcd_USB_OTG_HS, PCD_ISOOUTIncompleteCallback);
HAL_PCD_RegisterIsoInIncpltCallback(&hpcd_USB_OTG_HS, PCD_ISOINIncompleteCallback);
#endif /* USE_HAL_PCD_REGISTER_CALLBACKS */
HAL_PCDEx_SetRxFiFo(&hpcd_USB_OTG_HS, 0x200);
HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_HS, 0, 0x80);
HAL_PCDEx_SetTxFiFo(&hpcd_USB_OTG_HS, 1, 0x174);
}
return USBD_OK;
}