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-rw-r--r--src/touchpad.c278
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diff --git a/src/touchpad.c b/src/touchpad.c
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-/* ChibiOS/GFX - Copyright (C) 2012
- Joel Bodenmann aka Tectu <joel@unormal.org>
-
- This file is part of ChibiOS/GFX.
-
- ChibiOS/GFX 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.
-
- ChibiOS/GFX 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 <http://www.gnu.org/licenses/>.
-*/
-
-/**
- * @file touchpad.c
- * @brief Touchpad Driver code.
- *
- * @addgroup TOUCHPAD
- * @{
- */
-#include "ch.h"
-#include "hal.h"
-#include "gdisp.h"
-#include "touchpad.h"
-
-#if GFX_USE_TOUCHPAD || defined(__DOXYGEN__)
-
-#if TOUCHPAD_STORE_CALIBRATION
-extern void tp_store_calibration_lld(struct cal_t *cal);
-extern struct cal_t *tp_restore_calibration_lld(void);
-#endif
-
-/*===========================================================================*/
-/* Driver local definitions. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver local variables. */
-/*===========================================================================*/
-static struct cal_t *cal;
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-/**
- * @brief returns the uncalibrated readout of the X direction from the controller
- *
- * @noapi
- */
-static uint16_t _tpReadRealX(void) {
- uint32_t results = 0;
- uint16_t i, x;
-
- /* Median filtering is already done in LLD */
- for(i = 0; i < CONVERSIONS; i++) {
- results += tp_lld_read_x();
- }
-
- /* Take the average of the readings */
- x = results / CONVERSIONS;
-
- return x;
-}
-
-/**
- * @brief return the uncalibrated readout of the Y-direction from the controller
- *
- * @noapi
- */
-static uint16_t _tpReadRealY(void) {
- uint32_t results = 0;
- uint16_t i, y;
-
- /* Median filtering is already done in LLD */
- for(i = 0; i < CONVERSIONS; i++) {
- results += tp_lld_read_y();
- }
-
- /* Take the average of the readings */
- y = results / CONVERSIONS;
-
- return y;
-}
-
-/**
- * @brief draws a cross. Used for calibration.
- *
- * @noapi
- */
-static void _tpDrawCross(uint16_t x, uint16_t y) {
- gdispDrawLine(x-15, y, x-2, y, 0xffff);
- gdispDrawLine(x+2, y, x+15, y, 0xffff);
- gdispDrawLine(x, y-15, x, y-2, 0xffff);
- gdispDrawLine(x, y+2, x, y+15, 0xffff);
-
- gdispDrawLine(x-15, y+15, x-7, y+15, RGB565CONVERT(184,158,131));
- gdispDrawLine(x-15, y+7, x-15, y+15, RGB565CONVERT(184,158,131));
-
- gdispDrawLine(x-15, y-15, x-7, y-15, RGB565CONVERT(184,158,131));
- gdispDrawLine(x-15, y-7, x-15, y-15, RGB565CONVERT(184,158,131));
-
- gdispDrawLine(x+7, y+15, x+15, y+15, RGB565CONVERT(184,158,131));
- gdispDrawLine(x+15, y+7, x+15, y+15, RGB565CONVERT(184,158,131));
-
- gdispDrawLine(x+7, y-15, x+15, y-15, RGB565CONVERT(184,158,131));
- gdispDrawLine(x+15, y-15, x+15, y-7, RGB565CONVERT(184,158,131));
-}
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief Touchpad Driver initialization.
- * @note This function is NOT currently implicitly invoked by @p halInit().
- * It must be called manually.
- *
- * @api
- */
-void tpInit(const TOUCHPADDriver *tp) {
- cal = (struct cal_t*)chHeapAlloc(NULL, sizeof(struct cal_t));
- if(cal == NULL)
- return;
-
- /* Initialise Mutex */
- //MUTEX_INIT
-
- /* Initialise driver */
- //MUTEX_ENTER
- tp_lld_init(tp);
- //MUTEX_EXIT
-
- #if TOUCHPAD_STORE_CALIBRATION
- cal = tp_restore_calibration_lld();
- if(cal == NULL) {
- cal = (struct cal_t*)chHeapAlloc(NULL, sizeof(struct cal_t));
- tpCalibrate();
- }
- #endif
-}
-
-/**
- * @brief Get the X-Coordinate, relative to screen zero point.
- *
- * @return The X position in pixels.
- *
- * @api
- */
-uint16_t tpReadX(void) {
- uint16_t x, y;
-
-#if TOUCHPAD_XY_INVERTED == TRUE
- x = cal->xm * _tpReadRealY() + cal->xn;
- y = cal->ym * _tpReadRealX() + cal->yn;
-#else
- x = cal->xm * _tpReadRealX() + cal->xn;
- y = cal->ym * _tpReadRealY() + cal->yn;
-#endif
-
- switch(gdispGetOrientation()) {
- case GDISP_ROTATE_0:
- return x;
- case GDISP_ROTATE_90:
- return y;
- case GDISP_ROTATE_180:
- return GDISP_SCREEN_WIDTH - x - 1;
- case GDISP_ROTATE_270:
- return GDISP_SCREEN_HEIGHT - y - 1;
- }
-
- return 0;
-}
-
-/**
- * @brief Get the X-Coordinate, relative to screen zero point.
- *
- * @return The Y position in pixels.
- *
- * @api
- */
-uint16_t tpReadY(void) {
- uint16_t x, y;
-
-#if TOUCHPAD_XY_INVERTED == TRUE
- x = cal->xm * _tpReadRealY() + cal->xn;
- y = cal->ym * _tpReadRealX() + cal->yn;
-#else
- x = cal->xm * _tpReadRealX() + cal->xn;
- y = cal->ym * _tpReadRealY() + cal->yn;
-#endif
-
- switch(gdispGetOrientation()) {
- case GDISP_ROTATE_0:
- return y;
- case GDISP_ROTATE_90:
- return GDISP_SCREEN_WIDTH - x - 1;
- case GDISP_ROTATE_180:
- return GDISP_SCREEN_HEIGHT - y - 1;
- case GDISP_ROTATE_270:
- return x;
- }
-
- return 0;
-}
-
-void tpCalibrate(void) {
- const uint16_t h = gdispGetHeight();
- const uint16_t w = gdispGetWidth();
- const uint16_t cross[2][2] = {{(w/8), (h/8)}, {(w-(w/8)) , (h-(h/8))}};
- uint16_t points[2][2];
- uint8_t i;
-
- gdispSetOrientation(GDISP_ROTATE_0);
- gdispClear(Red);
- gdispFillStringBox(0, 10, gdispGetWidth(), 30, "Calibration", &fontUI2Double, White, Red, justifyCenter);
-
- for(i = 0; i < 2; i++) {
- _tpDrawCross(cross[i][0], cross[i][1]);
- while(!tpIRQ());
- points[i][0] = _tpReadRealX();
- points[i][1] = _tpReadRealY();
- chThdSleepMilliseconds(100);
- while(tpIRQ());
- gdispFillArea(cross[i][0]-15, cross[i][1]-15, 42, 42, Red);
- }
-
- cal->xm = ((float)cross[1][0] - (float)cross[0][0]) / ((float)points[1][0] - (float)points[0][0]);
- cal->ym = ((float)cross[1][1] - (float)cross[0][1]) / ((float)points[1][1] - (float)points[0][1]);
-
- cal->xn = (float)cross[0][0] - cal->xm * (float)points[0][0];
- cal->yn = (float)cross[0][1] - cal->ym * (float)points[0][1];
-
- #if TOUCHPAD_STORE_CALIBRATION
- tp_store_calibration_lld(cal);
- #endif
-}
-
-/**
- * @brief returns if touchpad is pressed or not
- *
- * @return 1 if pressed, 0 otherwise
- *
- * @api
- */
-#if TOUCHPAD_HAS_IRQ || defined(__DOXYGEN__)
- uint8_t tpIRQ(void) {
- return tp_lld_irq();
- }
-#endif
-
-/**
- * @brief Get the pressure.
- *
- * @return The pressure.
- *
- * @api
- */
-#if TOUCHPAD_HAS_PRESSURE || defined(__DOXYGEN__)
- uint16_t tpReadZ(void) {
- /* ToDo */
- return (tp_lld_read_z());
- }
-#endif
-
-#endif /* GFX_USE_TOUCHPAD */
-/** @} */
-
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