yeah, yeah, keep making fun of me...
The whole story was this: I spend the first weekend with my DS1054Z and on the rainy Sunday, after all family related things have been acomplished, I wanted to try and build a simple sin wave generator with my Arduino.
It did not work as expected - welcome to pulsed analogue output... Nice to see, though.
So I had a DAC PCB for the Arduino, which I did not solder to the pins (as opposed of Adafruits CLEAR instructions) and it did not work.
So I soldered it and it still did not work: no sin output.
And then there was the sin curve I was looking for!
But something was wrong: the probe wasn't touching the output pin of the DAC but my finger!
WTF!
So at like midnight I was in stupid mode and wondered what connection in the universe was created between my finger and the DAC.
Next day I had to ask, when I was in the office thinking about it.
So now you have the whole story and how one can get into trouble for not having a clear head.
The DAC, btw. I assume got fried or was a DOA.
Interestingly I tried to decode the i2c communication of pin A4 and A5. The device ID is decoded correctly, but not the data itself. The signal looks bad. That is another thing I have to look into. I managed to decode RS232 fine, so I gues the Arduino UNO is not outputting a good signal on A4/A5? On both my Arduinos? hmmm...
So right, suits me well, you have a laugh!
Cheers,
Vitor