"B|hler, Martin" wrote:
> when using i2c, i recommend to select i2c master and slave in a way,
> that main traffic is sent from master to slave.

I recommend the other way around, at least when dealing with PICs.
Microchip's implementation of the MSSP allows for a slave doing clock
stretch on a read but not on a write.  You therefore get flow control when
transferring from slave to master.  On writes (master to slave), there is no
direct way for the slave to slow down the master to whatever speed it can
digest the data at.  This either needs to be done outside IIC, or with
rather complex error and restart logic.  Due to some other issues with the
MSSP, the error/restart logic is difficult at best.


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