Talk:Lisa Gumstix Breakout

Autopilot Discussion

Maybe use Lia instead of Lisa/M. Lia has the same circuitry as lisa/m (apart from the BMP barometer). Then we could use the 0.1" header pins to do board to board connections between lia and the Lisa Gumstix Breakout (LGB). Esden 21:01, 21 August 2012 (UTC)

IO Discussion

I2C

• Should we have I2C level shifters or anything on the breakout board? Esden 21:01, 21 August 2012 (UTC)
• Confirmed that it is needed. No isolation for I2C but levelshifting to 5V or 3.3V Esden 01:15, 23 August 2012 (UTC)

Minimum requirements

Q: What is the minimal list of IO and power needed on the board? Esden 21:01, 21 August 2012 (UTC) A: Take a look at LisaL design, but if needed I can measure all of it with even the DSP running calcuation, but maybe ask in Gumstix forum(Hint)

Hardware Design / Form Factor Discussion

• Compatible with Lisa/M to stack on top with Plastic spacers

Lisa/M Example of Gumstix board layout

• CAN above CAN SPI above SPI for short simple cabling

BTW Make sure

• SD is still accessible
• Caspa Cam can be connected
• Bluetooth and Wifi antennas can be connected
• Heat distribution is good

Alternative:

• Nice to mate board-to-board with Lia, but should also be compatible with Lisa/M (perhaps at least mount lisa/m on the LGSB with 2mm hardware) Scdwyer 18:09, 23 August 2012 (UTC)
• What about compatibility with some LPC-based boards (maybe not board-to-board...) Scdwyer 18:09, 23 August 2012 (UTC)
• Some of the big (i.e. heavy) connectors could be optional with an easy to solder component, that way if someone only needs one usb or one ethernet, or nothing at all, it can be smaller/lighter/cheaper, but still have the capacity to add all the features Scdwyer 18:09, 23 August 2012 (UTC)
• Some considerations might be made for a good enclosure and cable management after mounting in an airframe. Always seems to be less room than expected on fixed-wing (quads perhaps less of an issue). Scdwyer 18:09, 23 August 2012 (UTC)

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