Baslinux mailing list

[sindi keesan <keesan AT sdf.lonestar.org>]

> > I set up our USB pda with /dev/ttyUSB) and 1.  BL does not do devfs, which
> > is a different system.  For a modem you would probably want /dev/ttyACM0
> >
> > > Could I just use a USB serial port with some kind of adaptor?
> >
> > I used the same software with serial and USB modems except for making the
> > USB devices and insmodding usb_serial.o, which will not insmod in kernel
> > 2.4.31 but will in 2.2.26.  I posted to the list how to do USB pda.
>
> I'll be studying that thread. Thanks.
>
> [delete]
> > Is there a USB serial port?
>
> I have USB ports all over the box. Is a USB _serial_ port something
> special? Thought that was just a device file.
>
> If it is _another_ special piece of hardware, on top of the USB modem,
> maybe I just ought to use 2.4.19 for BL:

USB to Serial Adaptor, sold online for $20, plugs into the USB port and 
provides a serial port.  (We have something similar for USB to PS/2 and 
for PS/2 to serial, to let us use older mice).  The software might be 
easier to set up than for your screwy PCI serial card.

The Handspring Visor is a PDA that comes with either serial or USB cradle.
Is a $20 USB to serial adaptor cheaper than a USB PDA cradle?

BL3 does not (yet) come with ttyUSB devices, though it works fine with 
them, so make at least two.  The 'big' 2.2.26 kernel either includes or 
lets you insmod usb_serial.  (2.4.31 won't insmod it, buggy).

   The Linux USB sub-system
   ______________________________________________________________________

USB Serial Converter support

   This serial driver supports a wide range of USB to serial adapters. It
   also  allows communication with the Handspring Visor. You need to turn
   on  USB  Serial  Converter  support,  and then select whichever of the

[Is this in the 2.2.26 big kernel?]

   various  particular drivers you need. The Generic Serial Driver can be
   used  with  a  wide  range of converters, by specifying the vendor and
   product ID codes when you load the USB serial converter module: insmod
   usb-serial.o  vendor=0xVVVV  product-0xPPPP,  where you need to change
   the VVVV and PPPP to match your device.

   The  serial  port  driver  uses  a  major number of 188. Up to sixteen
   serial  ports are supported. To create the appropriate device entries,
   use the following commands:

mknod /dev/usb/ttyUSB0 c 188 0
mknod /dev/usb/ttyUSB1 c 188 1
[etc. if you have more than 2 USB ports to convert to serial use]

   You  should  now  be able to plug in a serial device into the adapter,
   and use the /dev/usb/ttyUSB0 just as if it were a normal serial port.

   1. http://www.linux-usb.org/USB-guide/book1.html