touchZones.c

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#include "touchZones.h"
 
/* Accepted touch area. Deliberately generous: the BEEP row sits at the very bottom of
 * the panel and its presses read Y ~3340-3600, so a tight limit rejected them. Idle
 * (untouched) junk readings are already rejected by the pressure band in main.c. */
#define TOUCH_X_MIN        300
#define TOUCH_X_MAX       3700
#define TOUCH_Y_MIN        300
#define TOUCH_Y_MAX       3650
 
#define TOUCH_X_SPLIT     2060
 
/* Row boundaries, from measured presses on the panel with the printed layout:
 * LED1 Y ~580-880, LED2 ~1660-1790, LED3 ~2420-2700, BEEP ~3115-3560. */
#define TOUCH_Y_LED1_LED2 1285
#define TOUCH_Y_LED2_LED3 2075
#define TOUCH_Y_LED3_BEEP 2900
 
touchZone_t touchZoneFromPoint(int16_t x, int16_t y) {
    if (x < TOUCH_X_MIN || x > TOUCH_X_MAX || y < TOUCH_Y_MIN || y > TOUCH_Y_MAX) {
        return TOUCH_ZONE_NONE;
    }
 
    if (y >= TOUCH_Y_LED3_BEEP) {
        return TOUCH_ZONE_BEEP; /* full width: any X */
    }
 
    int right = (x >= TOUCH_X_SPLIT);
 
    if (y < TOUCH_Y_LED1_LED2) {
        return right ? TOUCH_ZONE_LED1_ON : TOUCH_ZONE_LED1_OFF;
    }
    if (y < TOUCH_Y_LED2_LED3) {
        return right ? TOUCH_ZONE_LED2_ON : TOUCH_ZONE_LED2_OFF;
    }
    return right ? TOUCH_ZONE_LED3_ON : TOUCH_ZONE_LED3_OFF;
}
 
const char *touchZoneName(touchZone_t zone) {
    switch (zone) {
    case TOUCH_ZONE_LED1_OFF: return "LED 1 OFF";
    case TOUCH_ZONE_LED1_ON:  return "LED 1 ON";
    case TOUCH_ZONE_LED2_OFF: return "LED 2 OFF";
    case TOUCH_ZONE_LED2_ON:  return "LED 2 ON";
    case TOUCH_ZONE_LED3_OFF: return "LED 3 OFF";
    case TOUCH_ZONE_LED3_ON:  return "LED 3 ON";
    case TOUCH_ZONE_BEEP:     return "BEEP";
    default:                  return "none";
    }
}