Re: EMC minimill option/Parallel port issues

Dave, Ian, and other EMC folk

I just posted a TclTk script to the dropbox and to emc@... based on
Fred's code. It watches the parport and reports status of the pins. You
may have to fix it so it finds iosh. (line 3 plat/????/bin/iosh)

We should be able to build a pin exerciser (run at your own risk) as well.

Ray

>Message: 2 [CAD_CAM_EDM_DRO] Digest Number 388
> Date: Fri, 3 Mar 2000 12:35:14 -0000
> From: "Ian Wright" <Ian@...>
>Subject: Re: EMC minimill option/Parallel port issues
>
>
>----- Original Message -----
>From: <daveland@...>
>
>> Is there a utility people use in linux to scan the port bit input bit
>values
>> and display them or manually set the outputs for debug ( not while emc is
>running)?
>> I need one!!!
>
>I haven't heard of one of these, but I use a home-built board which is
>simply a handful of LEDs hooked up to a ULN2003 driver chip which plugs into
>the parallel port and gives a clear indication of what is happening there.
>For switch inputs, you can simply wire a 4k7 resistor from the pin to a 5v
>supply line and then pull it low with a switch to ground. I would think that
>this is a better way than relying on a program running in the same computer
>as any faults in the computer are likely to get mimiced or ignored as when
>EMC is running.