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Forum Index : Microcontroller and PC projects : I2C question

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kiiid

Guru

Joined: 11/05/2013
Location: United Kingdom
Posts: 671

Posted: 09:56am 23 Sep 2015

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Is there any way to enable the PIC32's built-in pull-ups on the I2C lines, and have the lines configures for I2C operation in MM+ with them?
Thanks

http://rittle.org

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matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10406

Posted: 10:08am 23 Sep 2015

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Try setting up I2C as normal and then poking the CNPUB register to turn on the pullup on b8 and b9

Poke &HbF886158, &H300

UNTESTED!!!!!!

bigmik

Guru

Joined: 20/06/2011
Location: Australia
Posts: 2956

Posted: 06:10pm 23 Sep 2015

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Hi Kon, Peter,

That is a good idea, I assume these pullups will be `weak' ones so external may still be required but they may be fine for some devices at slow speeds.

maybe the I2C open command can be added to by something like

I2C OPEN speed, timeout, PU

Regards,

Mick

Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<<

Geoffg

Guru

Joined: 06/06/2011
Location: Australia
Posts: 3303

Posted: 02:41pm 25 Sep 2015

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bigmik said I2C OPEN speed, timeout, PU

Great idea, I will add it to the list.

Geoff Graham - http://geoffg.net

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