Hi all,
we are developing a board based on STM32F429 chip.
In particular I'm developing a composite USB device on USB OTG port, showing a custom device + a CDC device [ep 0x85, 0x06, 0x83] using USB_Device_Library code.
Windows correctly shows 3 items: a composite device, a generic USB device with my custom label/name, a virtual serial port (COM8).
When I try to open the virtual port (by Putty) I see nothing on the terminal but if I inspect with Wireshark I see an infinite loop of BulkIN request, BulkIn response with XACT_ERROR, a RESET_PIPE_AND_CLEAR_STALL with both request end reply.
I'n wondering why I have the XACT_ERROR on BulkIn request: I'm not able to find the point. I break-pointed some code in the HAL_PCD_IRQHandler() routine but it's hard to step in an interrupt handler.
Very similar code (but compiled for STM32MP135 demo board) is working correctly.
I'm focusing on USB_OTG_GINTSTS_IEPINT interrupt but which is the routine that replies to BulkIn?
Maybe the PCD_WriteEmptyTxFifo() ??
Thanks
