IIC hangs when D3 is interrupt

[marcusuy]

Hey Loppen,

I'm getting a similar-ish problem:

Photon Solid Green/Cyan LED when calling I2C

Hey All and Particle Team (@mdma @BDub ), I’m testing out the Photon now with firmware 0.4.7 and the issue on the Photon is that after a few loops, most times as few as just one loop, the Photon “hangs” with the observable behavior being a solid green/cyan LED (the same color as WiFi, except without “breathing”). The main commonality, so far, seems to be it stops working when accessing I2C components via the Wire functions. Given that the Photon typically gets through the first loop without t…

I get the same cyan without breathing after a one or three loops.

@mdma Would appreciate any ideas you might have as well.

The code I'm using was working on earlier versions of the Core, but has now also stopped working since I updated my Core to 0.4.7, the Photon fares a little better with 0.4.7 by being able to run a couple loops before failing.