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GINPUT Touch Calibration

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Improvements to error detection and displaying that to the user during a
calibration.
Also introduced a hack to allow initialisation of a touch device without
an automatic calibration for when the user application wants to do
something with the raw readings first.
This commit is contained in:
Andrew Hannam 2012-11-30 00:44:24 +10:00
parent e741d6045b
commit 64ceade60c
1 changed files with 39 additions and 7 deletions
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46
src/ginput/mouse.c
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@ -40,7 +40,10 @@
#endif
#define GINPUT_MOUSE_CALIBRATION_FONT &fontUI2Double
#define GINPUT_MOUSE_CALIBRATION_FONT2 &fontUI2Narrow
#define GINPUT_MOUSE_CALIBRATION_TEXT "Calibration"
#define GINPUT_MOUSE_CALIBRATION_ERROR_TEXT "Failed - Please try again!"
#define GINPUT_MOUSE_CALIBRATION_SAME_TEXT "Error: Same Reading - Check Driver!"
#if GINPUT_MOUSE_MAX_CALIBRATION_ERROR < 0
#define GINPUT_MOUSE_CALIBRATION_POINTS 3
@ -327,7 +330,9 @@ GSourceHandle ginputGetMouse(uint16_t instance) {
#endif
// We only support a single mouse instance currently
if (instance)
// Instance 9999 is the same as instance 0 except that it installs
// a special "raw" calibration if there isn't one we can load.
if (instance && instance != 9999)
return 0;
// Do we need to initialise the mouse subsystem?
@ -348,6 +353,14 @@ GSourceHandle ginputGetMouse(uint16_t instance) {
MouseConfig.flags |= (FLG_CAL_OK|FLG_CAL_SAVED);
if ((MouseConfig.flags & FLG_CAL_FREE))
chHeapFree((void *)pc);
} else if (instance == 9999) {
MouseConfig.caldata.ax = 1;
MouseConfig.caldata.bx = 0;
MouseConfig.caldata.cx = 0;
MouseConfig.caldata.ay = 0;
MouseConfig.caldata.by = 1;
MouseConfig.caldata.cy = 0;
MouseConfig.flags |= (FLG_CAL_OK|FLG_CAL_SAVED);
} else
ginputCalibrateMouse(instance);
#endif
@ -410,6 +423,9 @@ bool_t ginputCalibrateMouse(uint16_t instance) {
MousePoint *pt;
int32_t px, py;
unsigned i, j;
#if GINPUT_MOUSE_MAX_CALIBRATION_ERROR >= 0
unsigned err;
#endif
if (instance || (MouseConfig.flags & FLG_IN_CAL))
return FALSE;
@ -422,13 +438,17 @@ bool_t ginputCalibrateMouse(uint16_t instance) {
gdispSetOrientation(GDISP_ROTATE_0);
#endif
gdispClear(Blue);
gdispFillStringBox(0, 5, width, 30, GINPUT_MOUSE_CALIBRATION_TEXT, GINPUT_MOUSE_CALIBRATION_FONT, White, Blue, justifyCenter);
#if GDISP_NEED_CLIP
gdispSetClip(0, 0, width, height);
#endif
#if GINPUT_MOUSE_MAX_CALIBRATION_ERROR >= 0
do {
while(1) {
#endif
gdispClear(Blue);
gdispFillStringBox(0, 5, width, 30, GINPUT_MOUSE_CALIBRATION_TEXT, GINPUT_MOUSE_CALIBRATION_FONT, White, Blue, justifyCenter);
for(i = 0, pt = points, pc = cross; i < GINPUT_MOUSE_CALIBRATION_POINTS; i++, pt++, pc++) {
_tsDrawCross(pc);
@ -454,6 +474,13 @@ bool_t ginputCalibrateMouse(uint16_t instance) {
pt->y = py / j;
_tsClearCross(pc);
if (i >= 1 && pt->x == (pt-1)->x && pt->y == (pt-1)->y) {
gdispFillStringBox(0, 35, width, 40, GINPUT_MOUSE_CALIBRATION_SAME_TEXT, GINPUT_MOUSE_CALIBRATION_FONT2, Red, Yellow, justifyCenter);
chThdSleepMilliseconds(5000);
gdispFillArea(0, 35, width, 40, Blue);
}
}
/* Apply 3 point calibration algorithm */
@ -471,10 +498,15 @@ bool_t ginputCalibrateMouse(uint16_t instance) {
_tsTransform(&MouseConfig.t, &MouseConfig.caldata);
/* Calculate the delta */
px = (MouseConfig.t.x - cross[3].x) * (MouseConfig.t.x - cross[3].x) +
err = (MouseConfig.t.x - cross[3].x) * (MouseConfig.t.x - cross[3].x) +
(MouseConfig.t.y - cross[3].y) * (MouseConfig.t.y - cross[3].y);
} while (px > GINPUT_MOUSE_MAX_CALIBRATION_ERROR * GINPUT_MOUSE_MAX_CALIBRATION_ERROR);
if (err <= GINPUT_MOUSE_MAX_CALIBRATION_ERROR * GINPUT_MOUSE_MAX_CALIBRATION_ERROR)
break;
gdispFillStringBox(0, 35, width, 40, GINPUT_MOUSE_CALIBRATION_ERROR_TEXT, GINPUT_MOUSE_CALIBRATION_FONT2, Red, Yellow, justifyCenter);
chThdSleepMilliseconds(5000);
}
#endif
// Restart everything