Freerunner games / using motion sensors in C

Federico Lorenzi florenzi at gmail.com
Tue May 13 09:54:58 CEST 2008


On that topic, a joystick interface to the accel. would be rather cool.

Cheers,
Federico

On 5/13/08, Andy Green <andy at openmoko.com> wrote:
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> Somebody in the thread at some point said:
>
> | If somebody tells me how to use the accelerometers, I will have a go. Is
> | it just like /dev/joydev ?
>
> You just open /dev/input/event2 (top accel) and/or 3 (bottom).  Have a
> look in <cross path>/usr/include/linux/input.h -- basically these guys
> turn up in there 300 a second:
>
> struct input_event {
> 	struct timeval time;
> 	__u16 type;    <==== type = 2
> 	__u16 code;    <==== code = 0=X, 1=Y, 2=Z
> 	__s32 value;   <==== signed mG force in 18mG steps
> };
>
> - -Andy
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