libftdi Archives

Subject: Re: Claiming devices has no effect under Linux

From: DJ Delorie <dj@xxxxxxxxxxx>
To: libftdi@xxxxxxxxxxxxxxxxxxxxxxx
Date: Wed, 6 Oct 2010 15:39:42 -0400
> If the device has a VID/PID which is associated with a kernel module I
> would expect that module to be loaded. If a device is not intended to be
> used with sio it *must* use another VID/PID. This is the whole idea
> behind the VID/PID system.

What about a device which *is* intended to be used by sio, but *sometimes*
you want to bit-bang it instead?

In my case, I use the FT232R chips as usb-to-serial ports for my MCUs,
but to *program* the MCU, I have to fiddle with the cbus pins too.
For that task, I need to load libftdi.  For normal communications I
just use /dev/ttyUSB* via sio.

libftdi - see for details.
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