Re: [Ftdi-usb-sio-devel] Continuous stream of characters sent by ftdi_sio driver.

[Bill R. <bil...@gm...>]

Definitely use the stock kernel driver it is the definitive version.

You are almost certainly not using the ftdi_sio driver if you are seeing
the stream of bytes.

See http://ftdi-usb-sio.sourceforge.net/ for notes on how to load the
driver for a vid/pid which is not registered with your kernel.

In particular: http://ftdi-usb-sio.sourceforge.net/#sec7

---
Bill








On Sat, Apr 6, 2013 at 8:37 AM, Ralph Loader <suc...@ih...> wrote:

> Hi,
>
> > when I use the 'generic' driver instead of ftdi_sio.
> >
> > 1. The driver appears to be sending a constant stream of characters to
> > the computer (i.e. to the machine with the USB port).  The characters
> > are alternatiely 0x01 and 0x60.
>
> The USB data packets sent by the FTDI devices all start with 2 bytes of
> modem status bits.  It sounds like these are what you are seeing.  The
> ftdi_sio driver is expected to remove them.
>
> I would expect you to see these with the 'generic' USB serial driver, but
> the ftdi_sio driver definately should be stripping those off before the
> data gets to minicom.
>
> Is it possible that somehow the ftdi_sio driver failed to attach and
> instead the generic driver was always grabbing the device?  If you haven't
> already, check the kernel messages in /var/log/* to make sure that the
> ftdi_sio driver really is being used.
>
> > The version of the driver available on the FTDI website is very old,
>
> My experience with ftdi devices and Linux is that it is prefereable to use
> the stock kernel driver, or libusb/libftdi, rather than the FTDI code.
>
> Cheers,
> Ralph.
>
> > and contains a comment which refers to symptoms such as I am seeing.
> > Unfortunately this version of the driver does not compile for 3.8.3
> > and before I delve more deeply into the code I'm hoping that someone
> > with more intimate knowledge of the driver will be able to point me in
> > the right direction to fix it.
> >
> > --
> >
> > 73,
> > Ged.
> >
> >
> ------------------------------------------------------------------------------
> > Minimize network downtime and maximize team effectiveness.
> > Reduce network management and security costs.Learn how to hire
> > the most talented Cisco Certified professionals. Visit the
> > Employer Resources Portal
> > http://www.cisco.com/web/learning/employer_resources/index.html
> > _______________________________________________
> > Ftdi-usb-sio-devel mailing list
> > Ftd...@li...
> > https://lists.sourceforge.net/lists/listinfo/ftdi-usb-sio-devel
>
>
> ------------------------------------------------------------------------------
> Minimize network downtime and maximize team effectiveness.
> Reduce network management and security costs.Learn how to hire
> the most talented Cisco Certified professionals. Visit the
> Employer Resources Portal
> http://www.cisco.com/web/learning/employer_resources/index.html
> _______________________________________________
> Ftdi-usb-sio-devel mailing list
> Ftd...@li...
> https://lists.sourceforge.net/lists/listinfo/ftdi-usb-sio-devel
>