How do I trigger my parallel port?

Daniele Migliorati

2018 9 25

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2 次查看（30 天）

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Hello community I need to use the 25 pin parallel port (that one for the printer, to make it easy) to trigger some custom made devices (very simple led attached via cable to a parallel port to be plugged to the computer) I did it many time with older machines, now I have a Matlab 2018a, with a 64bit computer. I alsways uysed "digitalio" function and realted to switch the leds on

 dio = digitalio('parallel','lpt1');
 addline(dio,0:7,'out')   %pin 8                 
 putvalue(dio.line,[0 1 0 0 0 0 0 0]);
 WaitSecs(.005);
 putvalue(dio.line,[0 0 0 0 0 0 0 0]);

Now those functions are not working, and I'm trying to figure out how use the daq commands. The principal problem is that the computer doesn't allow me to see the parallel port

When i type

daq.getDevices
ans = 
No data acquisition devices available.
Click here for a list of known vendors.
Click here for troubleshooting tips.

I obtain this error. I tried to update all the driver, i installed the National instrument support package for matlab but i'm still unable to solve my problem.,

Thank you!

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Daniele Migliorati 2018-9-27

移动：Walter Roberson 2024-9-8

Yes, I can see the device since Ii updated the dirvers for it, via control pannel. And yes... Of course I have a parallel port... Otherwise this topic would be very strange... I'm a researcher, so we build the computer on our own because we need the parallel port (at least me)