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[avr-chat] LIBUSB Linux / M$


From: Schwichtenberg, Knut
Subject: [avr-chat] LIBUSB Linux / M$
Date: Mon, 4 Dec 2006 09:03:02 +0100

Hi gang,

I want to use an FTDI chip a little bit more deeper than an ordinary serial 
prot. The HW is fixed as an FT245BM (parallel IF). That chip normally has an 
Send Immeditatily pin, but that's tied high and no chance to change hardwar. So 
I use libftdi and libusb not to wait 16ms for a small buffer to be tranferred. 
Technically no problem but... Additionslly to the fix pin the Product / Vendor 
Ids were changed from 0403/default to 0403/special (currently don't know the 
values). 

Myproblems:

1. Linux (SuSE 9.3) sets the access rights of the USB Controll port to root 
only. Manually I can change but how to tell that udev / hotplug system? Jörg 
sent me a patch for the udev rules file but the Systax from old (9.3) to new 
(10.x) changed and after translation that script did not trgger at all :-(.

2. usblib-WIN32
I've compiled in cygwin my Linux programm and the libftdi without problems. But 
I can't run it (device not found). Do I have to have a kind of generic USB 
driver? What is this filter issue and who dropped the description of the 
libusb(-win32) project? RTFM is no solution because there is no FM :-).

Cheers

Knut


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