On 12/07/14 23:52, Torfinn Ingolfsen wrote:
Hello,
Question: is writing to the device file (/dev/ugenX) with normal file calls
supposed to work in FreeBSD?
(as in "everything is a file" in unix-like operating systems)
Background: I recently got a usb label printer for cheap: a Dymo LabelManager
PnP[1]. I found the dymoprint[2] Python script, which works fairly well on
Linux.
It works (AFAICT) by reading / writing the usb device as a regular file, via
the device file.
You have to use usb_modeswitch[3] on the printer first, of course.
Hi,
/dev/ugenX is not a stream. You should either consider using libusb or
/dev/ulptX .
If it is supposed to work with those devices, you should postfix the
endpoint number:
/dev/usb/3.4.z
--HPS
Since we have all tools available on FreeBSD, I tried the setup on my FreeBSD
workstation, which currently runs FreeBSD 9.3-stable:
tingo@kg-core1$ uname -a
FreeBSD kg-core1.kg4.no 9.3-STABLE FreeBSD 9.3-STABLE #0 r273918: Fri Oct 31
22:52:44 CET 2014 r...@kg-core1.kg4.no:/usr/obj/usr/src/sys/GENERIC amd64
The detection code in the dymoprint script doesn't work on FreeBSD, but setting
the correct device via DEV_NODE in the script works:
tingo@kg-core1$ grep ^DEV_NODE dymoprint2
DEV_NODE = "/dev/ugen3.4"
But when I run the script I just get an IO error:
root@kg-core1# python dymoprint2 test
Traceback (most recent call last):
File "dymoprint2", line 313, in <module>
main()
File "dymoprint2", line 309, in main
lm.printLabel(labelmatrix, dottab)
File "dymoprint2", line 183, in printLabel
response = self.sendCommand()
File "dymoprint2", line 80, in sendCommand
responseBin = self.dev.read(8)
IOError: [Errno 5] Input/output error
References:
1) http://global.dymo.com/ieIE/Products/LabelManager_PnP.html
2) http://sbronner.com/dymoprint/
3) http://www.draisberghof.de/usb_modeswitch/
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