Par port card problems what to do???
04 Dec 2011 22:09 #15383
by PCW
Replied by PCW on topic Re:Par port card problems what to do???
Ditto Andy, use the outputs in sinking mode
The other reason some outputs wont source much current is they are open drain
with a weak pullup, and this varies by chipset and port mode (SPP EPP ECP)
If you use the outputs to sink current, all this exotica just melts away and
the ports "just work"
The other reason some outputs wont source much current is they are open drain
with a weak pullup, and this varies by chipset and port mode (SPP EPP ECP)
If you use the outputs to sink current, all this exotica just melts away and
the ports "just work"
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- garymcrobertpdx
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05 Dec 2011 05:02 #15389
by garymcrobertpdx
Replied by garymcrobertpdx on topic Re:Par port card problems what to do???
OK I have modified the par port wiring to sink current and have tested each channel
with success. One mod I want to make is to invert the par port pin out. I consulted the
HAL manual and integrators manual but have not found an explicit example as to
the syntax to do this. I have attempted a trial and error approach but have not stumble
on to the correct syntax.
Can some one show me the correct syntax to produce an inverted output on a par port
pin like this one net xstep => parport.0.pin-02-out
with success. One mod I want to make is to invert the par port pin out. I consulted the
HAL manual and integrators manual but have not found an explicit example as to
the syntax to do this. I have attempted a trial and error approach but have not stumble
on to the correct syntax.
Can some one show me the correct syntax to produce an inverted output on a par port
pin like this one net xstep => parport.0.pin-02-out
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- garymcrobertpdx
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05 Dec 2011 07:03 #15391
by garymcrobertpdx
Replied by garymcrobertpdx on topic Re:Par port card problems what to do???
Never mind I found it! setp parport.0.pin-02-out-invert 1
Thanks to all
Thanks to all
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