Scott wrote:
> According to the datasheet, in Master mode:
> R_W = 1 -- Transmit is in progress
> R_W = 0 -- Transmit is not in progress

Hmm, I don't remember seeing that, but I just quickly grabbed a old 18F
datasheet and didn't look up your particular PIC, whatever that was.

In any case, "transmit in progress" sounds different to me from "SSPBUF
ready to accept another byte", which is how you apparently are trying to use
the bit.  Isn't there some xxIF bit in one of the PIR registers that is
specifically meant to tell you when SSPBUF can take another byte?

> The datasheet is not clear at all about I2C Firmware Controlled Master
> mode vs. Master mode.

Huh?  Something isn't making any sense.  The datasheet explains how the MSSP
works, including when it is used in IIC master mode.  It's not the
datasheet's purpose to tell you how to do IIC in firmware, and I'll be
rather surprised if newer versions contain anything about that.

Perhaps you are confusing the datasheet with the compiler or library manual?


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