c# LPT Control all pins. Not 8
Question
I can control 8 pins in LPT using inpout.dll. I want to control some LPT device but I need to use more than 8 pins. How to do it?
It can be COM or NET dll. I have no idea how to control more than 8 pins.
2 answers
solution1
1 2011-01-26 15:32:41
MUX maybe?
It can help you manipulate certain amount of bits by using less bits. By using 7 of them you could use the last X to multiplex others:
6 (data) + 1 (selector) => 12 bits
5 + 2 => 20 bits
4 + 3 => 32 bits
3 + 4 => 48 bits
2 + 5 => 64 bits
But this is not a programming question anyway. You will have to attach a multiplexer and a demultiplexer on the other side.
BTW: What kind of an LPT port is this, since [LPT port has lots of pins]. 25 and not just 7 or 8. Your holes for a connector are not really related to LPT port. At least it doesn't really look like they would be. Unless they are serialized. It seems there are 4 LPT ports on your connector + enable, ground & power supply (Vcc)
solution2
0 ACCPTED 2011-01-26 15:49:45
http://www.codeproject.com/KB/vb/Inpout32_read.aspx它在VB.NET中，但是我确定您可以弄清楚如何翻译它；）
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