Please let me know more details of the application/ firmware that you are using for receiving data on FX3 through parallel port (GPIF). Are you using SlaveFIFO interface as per this application note https://www.cypress.com/documentation/application-notes/an65974-designing-ez-usb-fx3-slave-fifo-interface
the driver lib returns the "RES_TRANS_ERR".
>> Please let me know which host application is used and does FX3 binds to Cypress Driver (cyusb3)
Sorry, the log has to be changed " usbd_state ".
Do you know this status ?
Please let me know the error code that is returned when the transfer fails.
Please refer to the following weblink for the error codes
USBD_STATUS: USBD_STATUS (Windows Drivers) | Microsoft Docs
NT_STATUS: [MS-ERREF]: NTSTATUS Values | Microsoft Docs
Please let me know which API returns this error and share the error code also.