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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Karl Kurbjun
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* 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"
#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 int last_touch;
static struct touch_calibration_point topleft, bottomright;
static bool using_calibration = false;
void use_calibration(bool enable)
{
using_calibration = enable;
}
void set_calibration_points(struct touch_calibration_point *tl,
struct touch_calibration_point *br)
{
memcpy(&topleft, tl, sizeof(struct touch_calibration_point));
memcpy(&bottomright, br, sizeof(struct touch_calibration_point));
}
static int touch_to_pixels(short val_x, short val_y)
{
short x,y;
int x1,x2;
if (!using_calibration)
return (val_x<<16)|val_y;
x1 = topleft.val_x; x2 = bottomright.val_x;
x = (val_x-x1)*(bottomright.px_x - topleft.px_x) / (x2 - x1) + topleft.px_x;
x1 = topleft.val_y; x2 = bottomright.val_y;
y = (val_y-x1)*(bottomright.px_y - topleft.px_y) / (x2 - x1) + topleft.px_y;
if (x < 0)
x = 0;
if (y < 0)
y = 0;
return (x<<16)|y;
}
void button_init_device(void)
{
last_touch = 0;
/* GIO is the power button, set as input */
IO_GIO_DIR0 |= 0x01;
/* 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;
}
#ifdef BOOTLOADER
int button_get_last_touch(void)
{
int ret_val = last_touch;
last_touch = 0;
return ret_val;
}
#endif
static void remote_heartbeat(void)
{
char data[5] = {0x11, 0x30, 0x11^0x30, 0x11+0x30, '\0'};
uart1_puts(data);
}
int button_read_device(void)
{
char c;
int i = 0;
int btn = BUTTON_NONE;
if (last_touch)
btn |= BUTTON_TOUCHPAD;
if ((IO_GIO_BITSET0&0x01) == 0)
btn |= BUTTON_POWER;
remote_heartbeat();
while (uart1_getch(&c))
{
if (i==0 && (c == BUTTON_START_BYTE || c == BUTTON_START_BYTE2) )
{
i++;
}
else if (i)
{
i++;
if(i==2)
{
if (c& (1<<7))
btn |= BUTTON_RC_HEART;
if (c& (1<<6))
btn |= BUTTON_RC_MODE;
if (c& (1<<5))
btn |= BUTTON_RC_VOL_DOWN;
if (c& (1<<4))
btn |= BUTTON_RC_VOL_UP;
if (c& (1<<3))
btn |= BUTTON_RC_REW;
if (c& (1<<2))
btn |= BUTTON_RC_FF;
if (c& (1<<1))
btn |= BUTTON_RC_DOWN;
if (c& (1<<0))
btn |= BUTTON_RC_PLAY;
}
else if(i==5)
{
i=0;
}
}
}
return btn;
}
void GIO14(void)
{
tsc2100_read_values(&last_x, &last_y,
&last_z1, &last_z2);
last_touch = touch_to_pixels(last_x, last_y);
IO_INTC_IRQ2 = (1<<3);
}
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