Andy Green wrote:
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Somebody in the thread at some point said:
|> For the accelerometers, the problem boils down to the FIFO not being
What FIFO? Where? There's no FIFO in the accels.
I'm sure you know the hardware better than I, but behavior indicates
there is either some sort of internal FIFO or a buffer of some kind.
There is a bit that tells you when a sample is ready to read. That bit
can generate an interrupt. The old code would then read one sample on an
edge interrupt and return. The problem was that the bit could at times
not get reset because of delays and there are actually 2 samples to
read. We can solve by either making level trigger or looping until the
bit is cleared. I prefer level trigger because if it breaks we get an
interrupt storm but the phone still functions. Looping in an interrupt
can be hard to debug.
- -Andy
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