Parallel Port! Detect incoming current, posible?

hyaku_ · 01-10-2005, 01:27 PM

Hello!
I have little knowledge about parallel port programming on Linux. I wan't to know if its possible to like 'listen' if the current is incoming into data pin? What I need is forexample I have two wires, one from Data pin 1 and other from ground, if I put them together some function will return for example 1 else 0! Does anybody know something about this function!? I think its called inb(); Thanx!

EvBladeRunnervE · 01-10-2005, 05:55 PM

what you are going to need to do is "poll" the pins. This can be done in multiple ways, but if you want the simplest, just go with a while loop that reads data from those pins, then calls/does something when you recieve certain results.

**Salem** · 01-11-2005, 02:42 AM

Worth a read
http://www.lvr.com/parport.htm
http://www.torque.net/linux-pp.html

01-10-2005, 01:27 PM	#1
hyaku_ Registered User Join Date: Jan 2005 Posts: 30	Parallel Port! Detect incoming current, posible? Hello! I have little knowledge about parallel port programming on Linux. I wan't to know if its possible to like 'listen' if the current is incoming into data pin? What I need is forexample I have two wires, one from Data pin 1 and other from ground, if I put them together some function will return for example 1 else 0! Does anybody know something about this function!? I think its called inb(); Thanx!
hyaku_ is offline

01-10-2005, 05:55 PM	#2
EvBladeRunnervE 'AlHamdulillah Join Date: Feb 2003 Posts: 790	what you are going to need to do is "poll" the pins. This can be done in multiple ways, but if you want the simplest, just go with a while loop that reads data from those pins, then calls/does something when you recieve certain results. __________________ there used to be something here, but not anymore
EvBladeRunnervE is offline

01-11-2005, 02:42 AM	#3
Salem and the hat of Jobseeking Join Date: Aug 2001 Location: The edge of the known universe Posts: 21,710	Worth a read http://www.lvr.com/parport.htm http://www.torque.net/linux-pp.html __________________ If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
Salem is offline

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