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/**
* Marlin 3D Printer Firmware
* Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
#pragma once
#include "../../inc/MarlinConfigPre.h"
#include "tft_io.h"
#ifndef TOUCH_SCREEN_CALIBRATION_PRECISION
#define TOUCH_SCREEN_CALIBRATION_PRECISION 80
#endif
#ifndef TOUCH_SCREEN_HOLD_TO_CALIBRATE_MS
#define TOUCH_SCREEN_HOLD_TO_CALIBRATE_MS 2500
#endif
typedef struct __attribute__((__packed__)) {
int32_t x, y;
int16_t offset_x, offset_y;
uint8_t orientation;
} touch_calibration_t;
typedef struct __attribute__((__packed__)) {
uint16_t x, y;
int16_t raw_x, raw_y;
} touch_calibration_point_t;
enum calibrationState : uint8_t {
CALIBRATION_TOP_LEFT = 0x00,
CALIBRATION_BOTTOM_LEFT,
CALIBRATION_TOP_RIGHT,
CALIBRATION_BOTTOM_RIGHT,
CALIBRATION_SUCCESS,
CALIBRATION_FAIL,
CALIBRATION_NONE,
};
class TouchCalibration {
public:
static calibrationState calibration_state;
static touch_calibration_point_t calibration_points[4];
static bool validate_precision(int32_t a, int32_t b) { return (a > b ? (100 * b) / a : (100 * a) / b) > TOUCH_SCREEN_CALIBRATION_PRECISION; }
static bool validate_precision_x(uint8_t a, uint8_t b) { return validate_precision(calibration_points[a].raw_x, calibration_points[b].raw_x); }
static bool validate_precision_y(uint8_t a, uint8_t b) { return validate_precision(calibration_points[a].raw_y, calibration_points[b].raw_y); }
static void validate_calibration();
static touch_calibration_t calibration;
static uint8_t failed_count;
static void calibration_reset() { calibration = { TOUCH_CALIBRATION_X, TOUCH_CALIBRATION_Y, TOUCH_OFFSET_X, TOUCH_OFFSET_Y, TOUCH_ORIENTATION }; }
static bool need_calibration() { return !calibration.offset_x && !calibration.offset_y && !calibration.x && !calibration.y; }
static calibrationState calibration_start() {
calibration = { 0, 0, 0, 0, TOUCH_ORIENTATION_NONE };
calibration_state = CALIBRATION_TOP_LEFT;
calibration_points[CALIBRATION_TOP_LEFT].x = 30;
calibration_points[CALIBRATION_TOP_LEFT].y = 30;
calibration_points[CALIBRATION_BOTTOM_LEFT].x = 30;
calibration_points[CALIBRATION_BOTTOM_LEFT].y = TFT_HEIGHT - 31;
calibration_points[CALIBRATION_TOP_RIGHT].x = TFT_WIDTH - 31;
calibration_points[CALIBRATION_TOP_RIGHT].y = 30;
calibration_points[CALIBRATION_BOTTOM_RIGHT].x = TFT_WIDTH - 31;
calibration_points[CALIBRATION_BOTTOM_RIGHT].y = TFT_HEIGHT - 31;
failed_count = 0;
return calibration_state;
}
static void calibration_end() { calibration_state = CALIBRATION_NONE; }
static calibrationState get_calibration_state() { return calibration_state; }
static bool calibration_loaded() {
if (need_calibration()) calibration_reset();
return !need_calibration();
}
static bool handleTouch(uint16_t x, uint16_t y);
};
extern TouchCalibration touch_calibration;
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