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hi
i once used a 16f872 as i2c slave.
look at the c code attached:
i2chw is the i2c slave code.
iic2lcd is the main code, just to show how routines of i2chw are called.
this approach is based on a microchip application note (assembler) with =
some modifications.
let me know if this works for you.
tino





>-----Original Message-----
>From: Robert Soubie [mailto:robert.soubie@FREE.FR]
>Sent: Monday, January 05, 2004 10:43 PM
>To: PICLIST@MITVMA.MIT.EDU
>Subject: [PIC:] Pic as an i2c slave
>
>Happy new year, Bonne ann=E9e nouvelle,
>
>Has anyone written a working (tested and testable)
>application programmed either in asm, Basic or C where the
>PIC would be used as an i2c slave?
>
>Despite much reading and testing in numerous attempts and
>some partial positive results, I am unable to have my own
>application work reliably;
>
>Specifically some calls from the master, a PC using two
>different i2C interfaces, are not "seen"; I do not have the
>least idea of why...
>
>I program in Basic and use interrupt routines on a 16F876
>that save compiler's internal variables, and I have
>explored, with no great success, the two main routes,
>i.e. either all exchanges are processed in the same routine
>starting at the first interrupt occurence (receiving a
>command byte and two parameters, processing then resending
>two result bytes) or as an alternatively I have implemented
>a state machine as per AN734x.
>
>The processing logics have been tested for all the
>occurences where the interrupts are "seen" and processed,
>i.e. 3 out of four times; they work ok.
>
>Thanks in advance for any help, for I do not know what to
>try next... I know I am looking for something that is far
>for obvious, as the paucity of information on the net
>testifies...
>
>* Xrobert.soubie@free.frX (veuillez supprimer les "X")
>* http://www.astrosurf.com/soubie
>* Au royaume des aveugles, les borgnes sont mal vus... - P.Dac
>
>--
>http://www.piclist.com#nomail Going offline? Don't AutoReply us!
>email listserv@mitvma.mit.edu with SET PICList DIGEST in the body


--
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------_=_NextPart_001_01C3D423.FFB1B11B
Content-Type: application/octet-stream;
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Content-Transfer-Encoding: base64
Content-Description: iic2lcd.c
Content-Disposition: attachment;
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------_=_NextPart_001_01C3D423.FFB1B11B--