May 22nd 2017: I've just got the new boards, and was willing to test those with the real stuff!
Made one mistake (or maybe not one, depends how one looks at it): the GPIO23 and GPIO24 are used to control the pulser -- but they are also used in getting ADCs signal on the "old". I just removed the issue by putting the PulseOff on GPIO21, and pulsing Off on GPIO21, and by removing the jumpers between Pon/Pon3 and Poff/Poff3.
I tested the oled connection with this procedure. It seems to work.
I don't need the power supply on with my laptop powering the Pi and the rest of the board. All seems OK, and capture is fine as well.
--> "Just" need to develop the API =)
See the end of this jupyter notebook
(yellow is out of the microcontroler emulator -- and blue is out of the enveloppe detector - which is what is being acquired at this level)
__ Doj v2__
Can't power the pulser along with USB power. When powered, I'm removing the 3.3V jumper
Actually, the power supply was at fault. When connecting with a 750mA 5V power supply, I can get all correctly, with the 3.3V jumper put on if not power supply, or without (or with) the 3.3V jumper but with the power regulator.