65f1a94a08
Flyspray: FS#10615 Author: Carsten Schreiter and myself git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22842 a1c6a512-1295-4272-9138-f99709370657
240 lines
6.5 KiB
C
240 lines
6.5 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2008 by Rob Purchase
|
|
*
|
|
* 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 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#include "config.h"
|
|
#include "cpu.h"
|
|
#include "button.h"
|
|
#include "adc.h"
|
|
#include "pcf50606.h"
|
|
#include "backlight.h"
|
|
#include "touchscreen.h"
|
|
#include "stdlib.h"
|
|
|
|
#define NO_OF_TOUCH_DATA 5
|
|
|
|
static bool touch_available = false;
|
|
static short x[NO_OF_TOUCH_DATA], y[NO_OF_TOUCH_DATA];
|
|
|
|
/* comparator for qsort */
|
|
static int short_cmp(const void *a, const void *b)
|
|
{
|
|
return *(short*)a - *(short*)b;
|
|
}
|
|
|
|
void button_read_touch()
|
|
{
|
|
unsigned char buf[3];
|
|
|
|
static long last_touch_interrupt = 0;
|
|
static int touch_data_index = 0;
|
|
|
|
/* put the touchscreen into idle mode */
|
|
pcf50606_write(PCF5060X_ADCC1, 0);
|
|
|
|
/* here the touch coordinates are read 5 times */
|
|
/* they will be sorted and the middle one will be used */
|
|
pcf50606_write(PCF5060X_ADCC2, (0xE<<1) | 1); /* ADC start X+Y */
|
|
|
|
do {
|
|
buf[1] = pcf50606_read(PCF5060X_ADCS2);
|
|
} while (!(buf[1] & 0x80)); /* Busy wait on ADCRDY flag */
|
|
|
|
buf[0] = pcf50606_read(PCF5060X_ADCS1);
|
|
buf[2] = pcf50606_read(PCF5060X_ADCS3);
|
|
|
|
pcf50606_write(PCF5060X_ADCC2, 0); /* ADC stop */
|
|
|
|
if (TIME_AFTER(current_tick, last_touch_interrupt + 1))
|
|
{
|
|
/* resets the index if the last touch could not be read 5 times */
|
|
touch_data_index = 0;
|
|
}
|
|
|
|
x[touch_data_index] = (buf[0] << 2) | (buf[1] & 3);
|
|
y[touch_data_index] = (buf[2] << 2) | ((buf[1] & 0xC) >> 2);
|
|
|
|
touch_data_index++;
|
|
|
|
if (touch_data_index > NO_OF_TOUCH_DATA - 1)
|
|
{
|
|
/* coordinates 5 times read */
|
|
touch_available = true;
|
|
touch_data_index = 0;
|
|
}
|
|
else
|
|
{
|
|
/* put the touchscreen back into the interrupt mode */
|
|
pcf50606_write(PCF5060X_ADCC1, 1);
|
|
}
|
|
last_touch_interrupt = current_tick;
|
|
}
|
|
|
|
struct touch_calibration_point {
|
|
short px_x; /* known pixel value */
|
|
short px_y;
|
|
short val_x; /* touchscreen value at the known pixel */
|
|
short val_y;
|
|
};
|
|
|
|
static struct touch_calibration_point topleft, bottomright;
|
|
|
|
static int touch_to_pixels(short val_x, short val_y)
|
|
{
|
|
short x,y;
|
|
|
|
x=val_x;
|
|
y=val_y;
|
|
|
|
x = (x-topleft.val_x)*(bottomright.px_x - topleft.px_x)
|
|
/ (bottomright.val_x - topleft.val_x) + topleft.px_x;
|
|
|
|
y = (y-topleft.val_y)*(bottomright.px_y - topleft.px_y)
|
|
/ (bottomright.val_y - topleft.val_y) + topleft.px_y;
|
|
|
|
if (x < 0)
|
|
x = 0;
|
|
else if (x>=LCD_WIDTH)
|
|
x=LCD_WIDTH-1;
|
|
|
|
if (y < 0)
|
|
y = 0;
|
|
else if (y>=LCD_HEIGHT)
|
|
y=LCD_HEIGHT-1;
|
|
|
|
return (x<<16)|y;
|
|
}
|
|
|
|
void button_init_device(void)
|
|
{
|
|
/* Configure GPIOA 4 (POWER) and 8 (HOLD) for input */
|
|
GPIOA_DIR &= ~0x110;
|
|
|
|
/* Configure GPIOB 4 (button pressed) for input */
|
|
GPIOB_DIR &= ~0x10;
|
|
|
|
touch_available = false;
|
|
|
|
/* Arbitrary touchscreen calibration */
|
|
topleft.px_x = 0;
|
|
topleft.px_y = 0;
|
|
topleft.val_x = 50;
|
|
topleft.val_y = 50;
|
|
|
|
bottomright.px_x = LCD_WIDTH;
|
|
bottomright.px_y = LCD_HEIGHT;
|
|
bottomright.val_x = 980;
|
|
bottomright.val_y = 980;
|
|
}
|
|
|
|
bool button_hold(void)
|
|
{
|
|
return (GPIOA & 0x8) ? false : true;
|
|
}
|
|
|
|
int button_read_device(int *data)
|
|
{
|
|
int btn = BUTTON_NONE;
|
|
int adc;
|
|
static int old_data = 0;
|
|
|
|
static bool hold_button = false;
|
|
bool hold_button_old;
|
|
static bool touch_hold = false;
|
|
static long last_touch = 0;
|
|
|
|
*data = old_data;
|
|
|
|
hold_button_old = hold_button;
|
|
hold_button = button_hold();
|
|
|
|
#ifndef BOOTLOADER
|
|
if (hold_button != hold_button_old)
|
|
backlight_hold_changed(hold_button);
|
|
#endif
|
|
|
|
if (hold_button)
|
|
return BUTTON_NONE;
|
|
|
|
if (GPIOB & 0x4)
|
|
{
|
|
adc = adc_read(ADC_BUTTONS);
|
|
|
|
/* The following contains some arbitrary, but working, guesswork */
|
|
if (adc < 0x038) {
|
|
btn |= (BUTTON_MINUS | BUTTON_PLUS | BUTTON_MENU);
|
|
} else if (adc < 0x048) {
|
|
btn |= (BUTTON_MINUS | BUTTON_PLUS);
|
|
} else if (adc < 0x058) {
|
|
btn |= (BUTTON_PLUS | BUTTON_MENU);
|
|
} else if (adc < 0x070) {
|
|
btn |= BUTTON_PLUS;
|
|
} else if (adc < 0x090) {
|
|
btn |= (BUTTON_MINUS | BUTTON_MENU);
|
|
} else if (adc < 0x150) {
|
|
btn |= BUTTON_MINUS;
|
|
} else if (adc < 0x200) {
|
|
btn |= BUTTON_MENU;
|
|
}
|
|
}
|
|
|
|
if (touch_available || touch_hold)
|
|
{
|
|
short x_touch, y_touch;
|
|
static short last_x = 0, last_y = 0;
|
|
|
|
if (touch_hold)
|
|
{
|
|
/* get rid of very fast unintended double touches */
|
|
x_touch = last_x;
|
|
y_touch = last_y;
|
|
}
|
|
else
|
|
{
|
|
/* sort the 5 data taken and use the median value */
|
|
qsort(x, NO_OF_TOUCH_DATA, sizeof(short), short_cmp);
|
|
qsort(y, NO_OF_TOUCH_DATA, sizeof(short), short_cmp);
|
|
x_touch = last_x = x[(NO_OF_TOUCH_DATA - 1)/2];
|
|
y_touch = last_y = y[(NO_OF_TOUCH_DATA - 1)/2];
|
|
last_touch = current_tick;
|
|
touch_hold = true;
|
|
touch_available = false;
|
|
}
|
|
old_data = *data = touch_to_pixels(x_touch, y_touch);
|
|
btn |= touchscreen_to_pixels((*data&0xffff0000)>>16,
|
|
(*data&0x0000ffff),
|
|
data);
|
|
}
|
|
|
|
if (TIME_AFTER(current_tick, last_touch + 10))
|
|
{
|
|
/* put the touchscreen back into interrupt mode */
|
|
touch_hold = false;
|
|
pcf50606_write(PCF5060X_ADCC1, 1);
|
|
}
|
|
|
|
if (!(GPIOA & 0x4))
|
|
btn |= BUTTON_POWER;
|
|
|
|
if (btn & BUTTON_TOUCHSCREEN && !is_backlight_on(true))
|
|
old_data = *data = 0;
|
|
|
|
return btn;
|
|
}
|