Re: Raspberry HAT <-> Pyboard adapter
Posted: Sun Jan 17, 2016 10:15 pm
worked in review and ended up in changing quite a bit of stuff:
- removed onboard neopixel footprints - they occupied too much space and it's easier to connect them externally.
- support for raspi's GPIO's up to pin 28 (which should provide support for most HAT's I believe)
- 3V3 jumper
- Pyboard "reset via Raspi" selectable by jumper
@dhylands: I initally placed the 5V Jumper but then removed it because the use-case for such a setup would be rare I believe. Backpowering the RPi should be ok because of the Pyboard's diode. The neopixel's supply is independent (if sourced externally).
As a summary I believe it should work with most of the HAT's available, specifically Adafruit's boards. I checked some of their schematics. In addition it provides support if you want to use the board as a HAT and offload GPIO work from the raspi to the pyboard or if you just want to play around with HAT's.
I know that not all of the pyboards pin are available externally. It's a tradeoff to time/complexity of the layout.
I haven't sent the files yet for production, but will do so by mid of next week - I hope! Feedback is still appreciated
-Martin
- removed onboard neopixel footprints - they occupied too much space and it's easier to connect them externally.
- support for raspi's GPIO's up to pin 28 (which should provide support for most HAT's I believe)
- 3V3 jumper
- Pyboard "reset via Raspi" selectable by jumper
@dhylands: I initally placed the 5V Jumper but then removed it because the use-case for such a setup would be rare I believe. Backpowering the RPi should be ok because of the Pyboard's diode. The neopixel's supply is independent (if sourced externally).
As a summary I believe it should work with most of the HAT's available, specifically Adafruit's boards. I checked some of their schematics. In addition it provides support if you want to use the board as a HAT and offload GPIO work from the raspi to the pyboard or if you just want to play around with HAT's.
I know that not all of the pyboards pin are available externally. It's a tradeoff to time/complexity of the layout.
I haven't sent the files yet for production, but will do so by mid of next week - I hope! Feedback is still appreciated
-Martin