RS-422 adapter problem [solved]

[jstrowe]

I am trying to use the GUI to download firmware to my board. I have it working perfectly with my board's RS-232 port using either a conventional serial port or a USB-to-RS-232 adapter. However, when I try to use a B&B Electronics USOPTL4 USB-to-RS-485/422 adapter to talk to my board's RS-422 port, it reports "The hardware detected a framing error." and "Found unknown device id(881) fw ver. 0.2.0" and aborts trying to connect to the BL. I know that the RS-422 adapter is working perfectly with two different dumb terminal programs and my board's RS-422 interface shares the same UART as the RS-232 interface and also works perfectly with the dumb terminals. The GUI correctly finds the RS-422 port reporting it as "RS-485 Isolated port (COM9)".

Do you have any idea what may be wrong?

Do you know of a USB-RS-422 adapter that is known to work?

Information on the RS-422 adapter is here:
http://www.bb-elec.com/product_family.as...lType=Main

Thanks,
John