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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Karl Kurbjun
*
* 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.
*
****************************************************************************/
/* this file also handles the touch screen driver interface */
#include "config.h"
#include "cpu.h"
#include "system.h"
#include "button.h"
#include "kernel.h"
#include "backlight.h"
#include "adc.h"
#include "system.h"
#include "backlight-target.h"
#include "uart-target.h"
#include "tsc2100.h"
#include "string.h"
#include "touchscreen.h"
#define BUTTON_TIMEOUT 50
#define BUTTON_START_BYTE 0xF0
#define BUTTON_START_BYTE2 0xF4 /* not sure why, but sometimes you get F0 or F4, */
/* but always the same one for the session? */
static short last_x, last_y, last_z1, last_z2; /* for the touch screen */
static bool touch_available = false;
static struct touch_calibration_point topleft, bottomright;
/* Jd's tests.. These will hopefully work for everyone so we dont have to
* create a calibration screen.
* Portait:
* (0,0) = 200, 3900
* (480,640) = 3880, 270
* Landscape:
* (0,0) = 200, 270
* (640,480) = 3880, 3900
*/
static int touch_to_pixels(short val_x, short val_y)
{
short x,y;
#if CONFIG_ORIENTATION == SCREEN_PORTRAIT
x=val_x;
y=val_y;
#else
x=val_y;
y=val_x;
#endif
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)
{
touch_available = false;
/* GIO is the power button, set as input */
IO_GIO_DIR0 |= 0x01;
#if CONFIG_ORIENTATION == SCREEN_PORTRAIT
topleft.val_x = 200;
topleft.val_y = 3900;
bottomright.val_x = 3880;
bottomright.val_y = 270;
#else
topleft.val_x = 270;
topleft.val_y = 200;
bottomright.val_x = 3900;
bottomright.val_y = 3880;
#endif
topleft.px_x = 0;
topleft.px_y = 0;
bottomright.px_x = LCD_WIDTH;
bottomright.px_y = LCD_HEIGHT;
/* Enable the touchscreen interrupt */
IO_INTC_EINT2 |= (1<<3); /* IRQ_GIO14 */
#if 0
tsc2100_writereg(TSADC_PAGE, TSADC_ADDRESS,
TSADC_PSTCM|
(0x2<<TSADC_ADSCM_SHIFT)| /* scan x,y,z1,z2 */
(0x1<<TSADC_RESOL_SHIFT) /* 8 bit resolution */
);
/* doesnt work for some reason...
setting to 8bit would probably be better than the 12bit currently */
#endif
}
inline bool button_hold(void)
{
return false;
}
#define TOUCH_MARGIN 8
char r_buffer[5];
int r_button = BUTTON_NONE;
int button_read_device(int *data)
{
int retval, calbuf;
static int oldbutton = BUTTON_NONE;
static long last_touch = 0;
r_button=BUTTON_NONE;
*data = 0;
if (touch_available)
{
short x,y;
bool send_touch = false;
tsc2100_read_values(&x, &y, &last_z1, &last_z2);
if (TIME_BEFORE(last_touch + HZ/5, current_tick))
{
if ((x > last_x + TOUCH_MARGIN) ||
(x < last_x - TOUCH_MARGIN) ||
(y > last_y + TOUCH_MARGIN) ||
(y < last_y - TOUCH_MARGIN))
{
send_touch = true;
}
}
else
send_touch = true;
if (send_touch)
{
last_x = x;
last_y = y;
*data = touch_to_pixels(x, y);
r_button |= touchscreen_to_pixels((*data&0xffff0000)>>16,
*data&0x0000ffff, data);
oldbutton = r_button;
}
last_touch = current_tick;
touch_available = false;
}
else
{
/* Touch hasn't happened in a while, clear the bits */
if(last_touch+3>current_tick)
{
oldbutton&=(0xFF);
}
}
if ((IO_GIO_BITSET0&0x01) == 0)
{
r_button |= BUTTON_POWER;
oldbutton=r_button;
}
retval=uart1_gets_queue(r_buffer, 5);
do
{
for(calbuf=0;calbuf<4;calbuf++)
{
if((r_buffer[calbuf]&0xF0)==0xF0 && (r_buffer[calbuf+1]&0xF0)!=0xF0)
break;
}
calbuf++;
if(calbuf==5)
calbuf=0;
if(retval>=0)
{
r_button |= r_buffer[calbuf];
oldbutton=r_button;
}
else
{
r_button=oldbutton;
}
} while((retval=uart1_gets_queue(r_buffer, 5))>=5);
return r_button;
}
/* Touchscreen data available interupt */
void read_battery_inputs(void);
void GIO14(void)
{
short tsadc = tsc2100_readreg(TSADC_PAGE, TSADC_ADDRESS);
short adscm = (tsadc&TSADC_ADSCM_MASK)>>TSADC_ADSCM_SHIFT;
switch (adscm)
{
case 1:
case 2:
touch_available = true;
break;
case 0xb:
read_battery_inputs();
break;
}
//touch_available = true;
IO_INTC_IRQ2 = (1<<3); /* IRQ_GIO14 == 35 */
}
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