Reading from a specific pin on parallel port

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Hello

All I need is to read a synchronisation 25ms pulse on pin 12 of the parallel port. Can anyone point me to the direction of how to do access an individual pin input in c#?

thanks!

Posted 8-Nov-10 4:43am

Member 2339208

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Posted 8-Nov-10 5:00am

shakil0304003

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Member 2339208 8-Nov-10 14:41pm

Thanks, I googled those down as well. What I am not getting from these, and maybe I'm just slow on it - how ro I read from a specific pin? When I call PortAccessAPI.Input(adress) - what would be the address for pin 12?

Also - if I need to wait for a pulse, do I just loop on PortAccessAPI.Input(adress), or there is a smarter way to do this (i.e callback of some sort)?

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Roger Wright · Accepted Answer · 2010-11-08T11:24:00

Individual pins do not have addresses, but you can AND the input word with a binary pattern to determine the value of just one pin. As for monitoring and responding to a single pin value, rather than delaying the rest of your app (and the entire PC) by continuously polling the port, create a thread to handle this and notify your main app when the value changes.