Re: [PATCH 03/12] hdaps: Unify and cache hdaps readouts

From: Shem Multinymous
Date: Tue Aug 08 2006 - 05:14:28 EST

On 8/8/06, Pavel Machek <pavel@xxxxxxx> wrote:
Okay, so what about ..

#define CONVERT(x) *(s16*)(data.val+x) * (hdaps_invert?-1:1);

...or better inline function?

Actually, some models require fancier transformations. This was
supposed to be reserved for a future patch, but might as well prepare
the infrastructure:

/* Some models require an axis transformation to the standard reprsentation */
static void transform_axes(int inx, int iny, int *outx, int *outy) {
*outx = inx * (hdaps_invert?-1:1);
*outy = iny * (hdaps_invert?-1:1);
/* Parse position data: */
*(s16*)(data.val+EC_ACCEL_IDX_YPOS1), &pos_x, &pos_y);

/* Parse so-called "variance" data: */
*(s16*)(data.val+EC_ACCEL_IDX_YPOS2), &var_x, &var_y);

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