USB Serial Devices and Speakup

Gregory Nowak greg at
Sun Oct 31 15:40:02 EST 2004

Hash: SHA1

As far as I know, speakup will not drive a synth connected via a
serial to usb converter. This is because the addresses used by usb are
different then the addresses used by standard serial ports. There is
also the fact that the uarts in serial to usb converters differ from
the standard 16550a uart in a standard serial port as far as I know.

Since cvs speakup is now modularized, I was wondering for some time
now if it might not be possible to drive a usb to serial connected
synth, assuming that the synth driver in question was loaded as a
module after the usb system came up, and if the serial synth module
could accept i/o addresses as arguments. There would  of course be the
problem of the different uarts, although I suspect that could be dealt
with in some way as well. How about it Kirk? Would this be possible to
implement? If so, then I just might play with speakup serial code, and
see what I could figure out.


On Sun, Oct 31, 2004 at 11:33:26AM -0800, Zachary wrote:
> Hi,
> I've given up with the keypad on my desktop, and anyway my laptop has got a 
> hard drive to spare.
> I'm wondering how Speakup will recognize a Dectalk Express connected via a 
> USB serial adapter?  My laptop doesn't have any built in serial ports, and 
> so I have to use an adapter.
> Do I have to supply extra Kernel options to get it to boot?  If not, how 
> can I start speech after the Kernel has detected the USB device?  Assuming, 
> of course, that it supports it.
> Thanks,
> Zack
> _______________________________________________
> Speakup mailing list
> Speakup at
> !DSPAM:41853e995316012368881!

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