> -----Original Message-----
> From: Tony K=FCbek [SMTP:tony.kubek@FLINTAB.COM]
> Sent: Wednesday, April 02, 2003 12:52 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [PIC]: I2C MSSP slave implementation
>=20
> Well this case is a bit special, I think I need to know
> both the start and stop conditions (particulary stop) as
> I need to do some data processing after the message is recived.
> The final program will emulate an Philiphs LCD driver chip
> but add an hoist of additional features (MMC-card gateway, Realtime
> clock, LED display support (7segment)).=20
> I haven't seen an clearcut way to signalise that the data from
> the master is complete without hooking onto the stop condition.
> Or are there other ways ?=20
>=20
In my case, the structure of my "data link" protocol meant that either the
messages were of fixed length (the actual length determined by the first
"command" byte, using a lookup table), or the message included a length byte
(both master to slave and slave to master).  The command was executed after
the last byte had been sent by the master.

If you have to support arbitrary length message structures then the easiest
way by far is to enable the START/STOP interrupts.

Regards

Mike


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