[ale] usbdevfs confusion

[Christopher Bergeron]

Jerald, thanks for the help, but my device isn't a memory stick.  It's 
actually a USB-serial converter.  I have it working on one of my linux 
boxes, but not the other.  I can't seem to figure out why.

When I plug the device in, it says it's being added to "ttyUSB0".  I 
have a /dev/ttyUSB0 with the right character node (188 0) and my 
permissions are apparently correct (because they're the same as on the 
working machine).

Is there a utility I can use to monitor the /dev/ttyUSB0 device to see 
if anything is happening there?  I've tried "cat /dev/ttyUSB0", but no adeu.

Or does anyone have any other ideas? 

Thanks,
CB




Jerald Sheets wrote:

> mkdir /mnt/flash
>
> mont -t <fstype> /dev/sda1 /mnt/flash
>
> Substitute your fstype, and if you already have scsi devices, use the 
> next available.  (I don't, so I use /dev/sda1)
>
> Hope that helps.
>
> --Jerald
>
>
>
> On Nov 14, 2004, at 2:50 PM, Christopher Bergeron wrote:
>
>> Can anyone help me figure out usbdevfs?  I'm trying to access a USB 
>> serial device using it, however, I'm not sure how I attach to it.
>>
>> The device is listed as 004 when I run  "lsusb".  When I look in 
>> /proc/bus/usb/001/  I see the device listed as: 004.  However, when I 
>> try to open the device from my program:  programname -d 
>> /proc/bus/usb/001/004, it doesn't work.
>>
>> I also tried creating a node in /dev for "ttyUSB0" (using mknod c 188 
>> 0), and that doesn't work either.
>>
>> Is usbdevfs not meant to be accessed as a file device like /dev is?
>>
>> Can anyone shed any light on this for me?  I'm pretty confused here.
>>
>> Thanks!
>> -CB
>>
>>
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>
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