Subject:
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PORTD WOM Control Bit
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Tue, 23 Sep 1997 20:35:42 GMT
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Original-From:
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Marce Jimenez <(mja@ctv.es)antispam()>
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Viewed:
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1272 times
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Hello to all,
I'm trying to link one pic homemade board with the HB using I2C. To
implement I2C in the HB side, I want to use two pins from PORTD, and I'd
like to configure it (PORTD) in a wired-OR way. To do that, I think I need
to do something like:
DOWM EQU $20 PORTD WOM CONTROL BIT
.
.
.
LDX #$1000 * REGISTER BASE
BSET SPCR,X,#DWOM * CONFIG PORTD AS OPEN DRAIN
.
.
.
My doubt is if this will affect the HB Serial Interface (lines TX and RX
from PORTD).
Will serial interface (and Interactive C) keep working?
Thanks,
marce
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