Questions tagged [parallel-port]

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Plugging USB causes parallel port to hang

I am developing a parallel port C++ application (on Ubuntu 18.04). Whenever a USB is plugged into the PC while the application is running, it causes one of the following ioctl calls to hang forever. ...
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2answers
197 views

Do “serial ports” or “parallel ports” apply to character devices only, but not to block devices?

From http://haifux.org/lectures/86-sil/kernel-modules-drivers/node10.html A Character ('c') Device is one with which the Driver communicates by sending and receiving single characters (bytes, ...
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1answer
3k views

How to make the parallel port to work?

Trying to make a cheap CNC machine to work, I have to connect through a parallel port. Unfortunately, I do not manage to make the parallel port to work. It seem the PCI parallel port card is detected,...
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2answers
545 views

Triggering hardware interrupts by connecting parallel port pins 9 and 10 does not work

I want to trigger hardware interrupts as described in the book Linux Device Drivers by connecting pins 9 and 10 with a wire. I tried that but apparently there's no interrupt beeing triggered: cat /...
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1answer
441 views

Sunix Low Level Parallel port driver not working

Background: I am currently in the process of updating a Industrial PC + software from Debian 4 (etch) to Debian 7 (Wheezy) due to hardware obsolescence, one of the few pieces of hardware being shared ...
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1answer
2k views

Cannot print text via /dev/usb/lp0 on recent printers

I have a strange problem, when I connect an old printer (HP, Epson, at last 4 years old printers) on my linux embedded board, when I type the command echo test > /dev/usb/lp0 it prints correctly. ...
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3answers
20k views

How to install a printer that is connected via an USB-to-Parallel-Port adapter?

I'm running Sabayon Linux (x86_64). $ uname -a Linux qdoe 3.7.0-sabayon #1 SMP Thu Dec 20 07:12:55 UTC 2012 x86_64 Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz GenuineIntel GNU/Linux I have a HP ...
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1answer
1k views

Can I use a parallel port as a CUPS input device?

I have an old piece of a hardware that does diagnostics on medical equipment. It prints out results over a parallel port. Is there any way to have CUPS accept jobs from a parallel port and redirect ...