Well the board was delayed a bit in customs, and then by me because I had more important things to do, unfortunately.
There are a few familiar headers I'd like to start with:
- At the top left corner there's the Pi's GPIO header,
- then, along the top edge, one row of arduino headers
- the second row of arduino headers is at the bottom edge
- and finally the two rows or Teensy 3 headers.
Additionally, the board comes with
- the yellow header (YH1, top right) for jumpers that connect between the Teensy UART1 and the RPi's UART (pins 8 and 10 of the Pi's GPIO)
- H2, which has the Teensy's SPI pins (11, 12 and 13), Reset, and power,
- and H3 for jumpers that connect either the Pi or the Teensy to the I²C signals on the arduino headers.
There's also a pogo pin that is supposed to hit the Teensy's reset signal at a test point that is located on the bottom side of the Teensy. I don't really believe that as I've already touched it and it looks a bit slanted.
Also, no silk screen hint about which way the teensy goes in, I had to grab the schematic to find out. And I measured the supply pin voltages to be sure.
How nice! Foam strips to protect the display and camera connectors! Not much more to say about the bottom side (for now).
Stacked with the Pi:
The board overlaps the LAN and video jacks. That's not a problem right away, but let's take a closer look:
Yup, the pin touches the jack. I don't know what the "bead"-thingy is, but this will surely benefit from a piece of tape. The same for the video jack:
with tape already applied. After that was done I powered the combo up and there was no smoke:
I'll plug in a Teensy next time and try to talk to it via serial (PC -> Pi -> Teensy (echo sketch) -> Pi -> PC).