pin_select again

tems · Joined: 26 Nov 2008 Posts: 8

If the pic is setup for dynamically changing the PPS and you set pin_select("U1RX", PIN_B12, TRUE, FALSE); for instance. I want to make this pin a digital pin again. How do you undo this dynamically?

any help would be appreciated

temtronic · Posted: Mon Jan 16, 2023 9:30 am

Which PIC ?

I was under the impression 1st gen PPS were selected once, not 'dynamic'...
edit...
found a paper on PPS by microchip....

OK ,seems as long as you do NOT 'lock' the PPS 'control register lock', you CAN 'dynamically' ( change in run time ), the pins.
Hopefully there's a few 'barriers' to prevent coding errors from changing PPS for you !

gaugeguy · Joined: 05 Apr 2011 Posts: 303

This depends greatly on which processor is being used, but "NULL" should be the output function for standard digital.
The output function list is in the processor header file.

Ttelmah · Joined: 11 Mar 2010 Posts: 19540

Two things. As Gaugeguy says selecting to NULL turns it off, but you also
must have NOPPS1WAY selected, otherwise the selection can only ever
be done once.
How you use NULL is shown at the end of this thread:
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http://www.ccsinfo.com/forum/viewtopic.php?t=58619&highlight=pinselect+null
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