It was a hard weekend. The whole weekend. But I enjoyed it. Writing code for little pieces of silicon can never be boring.

But things didn't go so well. The I2C protocol is simple enough - and in fact quite elegant - but the support IP on the microcontroller I was dealing with (one that is cheap enough to do what needed to be done) is more obscure than the protocol itself.

I got a lot done on it, but I did not get it working. The receive interrupt just will not fire, despite setting everything up correctly and injecting an I2C stream from another microcontroller.

So now I have asked for help and am hoping someone else can see what I did wrong, if in fact I did anything wrong. I hope I didn't - but then - I hope I did.