Neo FreeRunner GTA02 for helicopter control

Andy Green andy at
Wed Jul 2 09:56:21 CEST 2008

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Somebody in the thread at some point said:

| We have planed a nice project with openmoko.
| Our goal is to make a helicopter like vehicle with 4 engines to fly and
| the controller of that should be the Neo FreeRunner GTA02.
| To control the engines we think that we use PWM-moduls with I²C.
| I know, that sounds a bit crazy and a lot of work, but we have enough
| The first thing is, how we can get the best access to the accelerometers
| and to I²C.

Accelerometers come out on /dev/input/event2 and 3 using normal X Y Z

If you pop the top facia, I2C is available from two testpoints near the
debug connector.  I'll post a pic in a minute.

There is not really any spare PWM, but you can steal the one used for
FIQ (Timer 3) I guess.

| Can we use the toolchain for this application?

Yes it should be fine.

I'm not sure a usermode app is the way to go with this though, and I2C
may not be fast enough either, but you can get started that way.

- -Andy
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