Comments for asyndetic.com

Comment on FTDI USB Serial Port Enumeration on Windows by Davide Andrea

Davide Andrea — Thu, 18 Aug 2011 18:35:36 +0000

Here are instructions to prevent a Windows computer from assigning a new COM port number each time a new device with a FT232RL IC is plugged into a USB port: http://liionbms.com/pdf/DisableFTDI_Enumeration.pdf
Feel free to use

Comment on Debugging USB Device Installation on Windows by Dan Savilonis

Dan Savilonis — Tue, 19 Jul 2011 04:08:06 +0000

It would be useful if it were protected by SFP in Windows. It’s certainly possible that a device driver removed this usb.inf either on purpose or accidentally, but there’s really no way to tell after the fact.

Comment on Debugging USB Device Installation on Windows by Joe

Joe — Fri, 15 Jul 2011 09:57:12 +0000

Excellent explanation. I also spent several hours searching, found your post only afterwards.
Dan, I agree with you that Windows should protect usb.ini and/or display a useful message if missing.
Who removes usb.inf? I believe some device installers copy their own usb.inf if missing, and remove it at uninstall time.

Comment on Visualizing the Heap on Embedded Systems by John Connors

John Connors — Fri, 28 Jan 2011 15:02:10 +0000

Thanks for this. I’ve been wrestling with these issues myself with PS3 and Android game development. I am going to try a scheme that involves having memory addresses on the y axis and t on the x axis. Before I’d been using a simple coloured grid of memory.

Hopefully this will work.

Comment on Debugging USB Device Installation on Windows by Dan Savilonis

Dan Savilonis — Sun, 14 Nov 2010 23:44:38 +0000

I doubt that Windows deleted it. I suspect some poorly coded application or malicious program removed it… I have to wonder why Windows wouldn’t keep this file under system file protection and restore it.

Comment on Debugging USB Device Installation on Windows by Brian

Brian — Mon, 01 Nov 2010 23:31:57 +0000

You are a lifesaver! Wow. I was still a long, long way off from finding the root of this problem without your post. I was similarly totally confused as to why really basic USB devices (like my keyboard, like a KVI switch, like a mouse, etc.) were suddenly unrecognizable, and wouldn’t even install when I pointed it right at the appropriate driver! I didn’t see what you saw in setupapi.log, sadly. Sure glad you did! usb.inf was missing. What the hell??? I think the explanation for that might have been that I uninstalled USB hubs, etc. from the device manager to try and resolve a camera not being recognized and Windows must have thought deleting the usb.inf was the right thing to do as part of uninstalling the usb driver… I disagree, but oh well. THanks!!!!

Comment on FTDI USB Serial Port Enumeration on Windows by Track Hacker

Track Hacker — Wed, 15 Sep 2010 02:00:32 +0000

Locked Up Ardunio Duemilanove, Part 3…

I really found your post interesting so I added a trackback to it on my Track Hacker blog …

Comment on FTDI USB Serial Port Enumeration on Windows by Track Hacker

Track Hacker — Tue, 14 Sep 2010 19:32:15 +0000

Locked Up Ardunio Duemilanove, Part 2…

I really found your post interesting so I added a trackback to it on my Track Hacker blog …

Comment on Debugging USB Device Installation on Windows by mabra

mabra — Sun, 25 Jul 2010 23:56:20 +0000

Hi !

After 12 hours of searching, your post was the absolute hit!!!!
Much, much thanks!! After copying over a usb.inf my problem was solved!

br++mabra