[maemo-developers] [maemo-developers] Getting the pl2303 usb serial driver to work with /dev/ttyUSB0

From: markc at catsandwich.com markc at catsandwich.com
Date: Mon Feb 20 02:54:51 EET 2006

  Many thanks for the reply -- I am using an IOGEAR GUC232A, which works fine on my SuSe 9.3 dev machine.

  Just to make sure I flashed to the latest image 2005.51-13 -- thus replacing my custom kernel.  No /dev/ttyUSB0, etc.

  I don't need a getty, just a serial device.  We hope to be able to talk to the rs-232 port on a very specialized bit of test equipment using software that already runs on a SuSe 9.3 laptop.  Our app builds fine under the SDK_ARM, and is very generic -- only using bits of:

#include <termios.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/signal.h>
#include <sys/types.h>

  Once I am able to talk to the device our hope is to add a GUI for display of acquired spectra, calibration, etc.  It would be wonderful not to have to lug a laptop about as is done now.

  As of now -- I am thinking it may be the hub -- still looking.



>-----Original Message-----
>From: Ed Bartosh [mailto:Eduard.Bartosh at nokia.com]
>Sent: Sunday, February 19, 2006 04:52 PM
>To: ext maemo-developers-bounces at maemo.org
>Cc: maemo-developers at maemo.org
>Subject: Re: [maemo-developers] Getting the pl2303 usb serial driver to work with /dev/ttyUSB0
>PL2303 driver is compiled into n770 kernel:
>grep ^CONFIG_USB_SERIAL arch/arm/configs/n770_defconfig
>My pl2303-compatible usb-2-serial adapter works with n770 without any modifications.
>Unfortunately I don't remember the model. I'll tell you tomorrow if it's needed.
>And you probably don't need to makedev devices. udev should take care of them.
>inittab should also be modified to run getty on ttyUSB0 if usb2serial device is 
>connected to n770 on boot stage. 
>Look at /etc/init.d/ttyusb for the details. 
>On Sun, 2006-02-19 at 19:36, ext maemo-developers-bounces at maemo.org wrote:
>> Hello,
>> I need to get usbserial working so that my application can communicate with a bit of specialized hardware via rs-232 -- using a PL2303 USB to serial adapter.
>> I've checked the kernel config and see the pl2303 driver is there, and have rebuilt the kernel without the serial console (under the usbserial config).
>> Flashed the kernel, and used flasher to enable USB host, etc.
>> MAKEDEV usb builds the device special files, /dev/ttyUSB0, etc.
>> However I cannot open the device -- "so such device" error.
>> Has anyone else done this ?
>> Any info, suggestions would be most welcome.
>> Thanks.
>> Mark
>> _______________________________________________
>> maemo-developers mailing list
>> maemo-developers at maemo.org
>> https://maemo.org/mailman/listinfo/maemo-developers
>Best regards,
>maemo-developers mailing list
>maemo-developers at maemo.org

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