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PIC24EP512 - Exiting from i2c lock-up on faulty sensor
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benoitstjean



Joined: 30 Oct 2007
Posts: 533
Location: Ottawa, Ontario, Canada

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PostPosted: Tue Oct 10, 2023 10:10 am     Reply with quote

Oh ok so then simply activating the weak pull-ups on my two pins will return the proper NACK if the sensor is not there?
newguy



Joined: 24 Jun 2004
Posts: 1894

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PostPosted: Tue Oct 10, 2023 11:31 am     Reply with quote

Yes.
Ttelmah



Joined: 11 Mar 2010
Posts: 19145

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PostPosted: Wed Oct 11, 2023 7:39 am     Reply with quote

I have to add one 'caveat' to this.
If there is a lot of tracking on the board without the sensors attached,
there could be too much capacitance for the internal pull-ups to manage
to get the lines high 'in time' for the ACK. They pull very little current!.
However they should. Very Happy
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