USB Serial Converters to RS232

Thanks everybody for your help and suggestions.

I found out that:

1> My USB tty devices do work correctly under Win2K and 2.4 kernel.
2> My USB tty devices do not work correctly under 2.6 especially 2.6.5-7.200
3> The chmod etc make no differencs, but thanks of the suggestion.
4> I have tried unsuccessfully to get Kernel 2.6.8 (latest release) to work.
5> Minicom always gave the error message:
glider:/home/gmkelly # minicom
LANG/ja
LANG/ko
LANG/ru
minicom: cannot open /dev/usb/ttyUSB0: No such device

On Kernel 2.4.21 its somewhat OK, drops RS signals and hangs occasionally.

As you can see I have tried several serial devices all without success.
glider:/home/gmkelly # lsusb
Bus 003 Device 008: ID 04b8:0803 Seiko Epson Corp.
Bus 003 Device 007: ID 05e3:0701 Genesys Logic, Inc.
Bus 003 Device 006: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial
Port
Bus 003 Device 004: ID 0557:2008 ATEN International Co., Ltd UC-232A Serial
Port [pl2303]
Bus 003 Device 003: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial
Port
Bus 003 Device 002: ID 0409:0058 NEC Corp. USB2.0 Hub Controller
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 002: ID 051d:0002 American Power Conversion Back-UPS Pro 500
Bus 001 Device 001: ID 0000:0000

Thanks for all your help. I am about to dive into source code at the
deep end.

Cheers. Grahame (at) wildpossum (dot) com.

Grahame <news@wildpossum.com> wrote:
>Thanks everybody for your help and suggestions.
>
>I found out that:
>
>1> My USB tty devices do work correctly under Win2K and 2.4 kernel.
>2> My USB tty devices do not work correctly under 2.6 especially 2.6.5-7.200
>3> The chmod etc make no differencs, but thanks of the suggestion.
>4> I have tried unsuccessfully to get Kernel 2.6.8 (latest release) to work.
>5> Minicom always gave the error message:
>glider:/home/gmkelly # minicom
>LANG/ja
>LANG/ko
>LANG/ru
>minicom: cannot open /dev/usb/ttyUSB0: No such device

That is still the wrong place to look for ttyUSB0 isn't it?

On my box it is /dev/ttyUSB0.

--
FloydL. Davidson <http://web.newsguy.com/floyd_davidson>
Ukpeagvik (Barrow, Alaska) floyd@barrow.com

Floyd L. Davidson <floyd@barrow.com> wrote:
> Grahame <news@wildpossum.com> wrote:
>>minicom: cannot open /dev/usb/ttyUSB0: No such device

> That is still the wrong place to look for ttyUSB0 isn't it?

> On my box it is /dev/ttyUSB0.

Agreed. /dev/usb/ttyUSB0 is very likely meant for use by the device
filesystem, devfs, which will eventually be removed from the kernel.
Maintenance for it has stopped. For more details see

http://www.kernel.org/pub/linux/util...tplug/udev-FAQ

--
Clifford Kite Email: "echo xvgr_yvahk-ccc@ri1.arg|rot13"
PPP-Q&A links, downloads: http://ckite.no-ip.net/

Clifford Kite <kite@see.signature.id> wrote:
>Floyd L. Davidson <floyd@barrow.com> wrote:
>> Grahame <news@wildpossum.com> wrote:
>>>minicom: cannot open /dev/usb/ttyUSB0: No such device
>
>> That is still the wrong place to look for ttyUSB0 isn't it?
>
>> On my box it is /dev/ttyUSB0.
>
>Agreed. /dev/usb/ttyUSB0 is very likely meant for use by the device
>filesystem, devfs, which will eventually be removed from the kernel.
>Maintenance for it has stopped. For more details see
>
>http://www.kernel.org/pub/linux/util...tplug/udev-FAQ

Actually I think he's got a typo there. For devfs it would
be /dev/usb/tts/0.

--
FloydL. Davidson <http://web.newsguy.com/floyd_davidson>
Ukpeagvik (Barrow, Alaska) floyd@barrow.com

Floyd L. Davidson <floyd@barrow.com> wrote:
> Clifford Kite <kite@see.signature.id> wrote:
>>Agreed. /dev/usb/ttyUSB0 is very likely meant for use by the device
>>filesystem, devfs, which will eventually be removed from the kernel.
>>Maintenance for it has stopped. For more details see
>>
>>http://www.kernel.org/pub/linux/util...tplug/udev-FAQ

> Actually I think he's got a typo there. For devfs it would
> be /dev/usb/tts/0.

Possibly, but he showed

glider:/ # ls -l /dev/usb/ttyUSB[0,1]
crw-rw-rw- 1 root uucp 188, 0 2004-09-29 08:33 /dev/usb/ttyUSB0
crw-rw-rw- 1 root uucp 188, 1 2004-04-06 23:27 /dev/usb/ttyUSB1

in his first thread. It appears he was trying to use /dev/usb/ttyUSB0
from the timestamp.

I really don't known, but tts _is_ used in, e.g., /dev/tts/0 to replace
/dev/ttyS0. The Documentation/filesystems/devfs/README in the 2.6.7
source doesn't contain an example for either /dev/usb/tts/x or for
/dev/usb/ttyUSBx. Regardless, the bottom line is that he should not
be using devfs.

--
Clifford Kite Email: "echo xvgr_yvahk-ccc@ri1.arg|rot13"
PPP-Q&A links, downloads: http://ckite.no-ip.net/
/* Those who can't write, write manuals. */