by Arjan van 't Ho » Sat, 26 Apr 2003 23:11:10
With kind regards,
Arjan van 't Hof
by Greg Andre » Sun, 27 Apr 2003 04:22:35
There's no library provided by Sun to do what you're asking.Quote:>I'm looking for a script of software which let me control the parallel port
>on pin level. I have a hardware circuit connected on my parallel port with
>LED's to see with data channel is up. I have it working on Linux, but the
>software (library) is not available on Solaris. The reason for this is, is a
>solution to get 8 hardware pins with can be controlled by software to
>control relais.
http://docs.sun.com/db/doc/816-0222/6m6nmlstr?a=view#ecpp-7d-indx-1
-Greg
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1. Low level control of printer port pins, HOW?
Hello world,
Can somebody tell me how I can control the signals of the
printer port using a C program in Linux?
I made a program like this:
open /dev/lp1
get lp1 status using an ioctl call
write 1 character to /dev/lp1 using write
close /dev/lp1
The program runs as root!
There is no printer connected to the device.
The ioctl call works but after that the program hangs!
When I tried to measure the voltages on the connector pins
I didn't measure any change at all! All pins still measured a low
level voltage!
HOW TO CONTROL THOSE PINS DIRECTLY FROM A PROGRAM WITHOUT HAVING
A PRINTER ON IT?
Regards,
Remco van den Berg
PS Please answer (also) by mail.
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