libftdi Archives

Subject: Re: FT2232H/MPSSE/JTAG Device Freeze

From: "Gerd v. Egidy" <gerd.von.egidy@xxxxxxxxxxxxx>
To: libftdi@xxxxxxxxxxxxxxxxxxxxxxx
Cc: Clifford Wolf <clifford@xxxxxxxxxxx>
Date: Tue, 29 Sep 2009 15:01:40 +0200
Hi,

> I'm maintaining a library for implementing JTAG SVF/XSVF players and have
> added support for FT2232H in MPSSE/JTAG today. The library and the FT2232H
> example program can be checked out from my subversion server:
>
>       http://svn.clifford.at/libxsvf/trunk/

Do you want us to a link to your project homepage on 
http://www.intra2net.com/en/developer/libftdi/links.php?

> The only problem: Sometimes the FTDI chip does not send any data when it
> should send something - causing my application to freeze. In this
> situations it seams like the chip ignores all the data I send to it.

are you sure that this is not some kind of cabling or usb connection issue? I 
once had similar symptoms and the problem turned out to be a bad usb pci 
interface card.

What helped debugging it was to enable usb debugging in the kernel (IIRC, you 
need to recompile your kernel). I saw some communication errors in the logs 
produced with this kernel option.

Kind regards,

Gerd


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