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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Barry Wardell
*
* 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.
*
****************************************************************************/
/* Taken from button-h10.c by Barry Wardell and reverse engineering by MrH. */
#include <stdlib.h>
#include "config.h"
#include "cpu.h"
#include "system.h"
#include "button.h"
#include "kernel.h"
#include "backlight.h"
#include "system.h"
static unsigned int old_wheel_value = 0;
static unsigned int wheel_repeat = BUTTON_NONE;
void button_init_device(void)
{
/* Enable all buttons */
GPIOF_ENABLE |= 0xff;
GPIOH_ENABLE |= 0xc0;
/* Scrollwheel light - enable control through GPIOG pin 7 and set timeout */
GPIOG_ENABLE = 0x80;
GPIOG_OUTPUT_EN |= 0x80;
/* Read initial wheel value (bit 6-7 of GPIOH) */
old_wheel_value = GPIOH_INPUT_VAL & 0xc0;
}
bool button_hold(void)
{
return (GPIOF_INPUT_VAL & 0x80)?true:false;
}
/*
* Get button pressed from hardware
*/
int button_read_device(void)
{
int btn = BUTTON_NONE;
unsigned char state;
static bool hold_button = false;
bool hold_button_old;
unsigned int new_wheel_value = 0; /* read later, but this stops a warning */
/* Hold */
hold_button_old = hold_button;
hold_button = button_hold();
#ifndef BOOTLOADER
/* light handling */
if (hold_button != hold_button_old)
{
backlight_hold_changed(hold_button);
}
#endif
/* device buttons */
if (!hold_button)
{
/* Read normal buttons */
state = GPIOF_INPUT_VAL & 0xff;
if ((state & 0x1) == 0) btn |= BUTTON_REC;
if ((state & 0x2) == 0) btn |= BUTTON_DOWN;
if ((state & 0x4) == 0) btn |= BUTTON_RIGHT;
if ((state & 0x8) == 0) btn |= BUTTON_LEFT;
if ((state & 0x10) == 0) btn |= BUTTON_SELECT; /* The centre button */
if ((state & 0x20) == 0) btn |= BUTTON_UP; /* The "play" button */
if ((state & 0x40) != 0) btn |= BUTTON_POWER;
/* Read wheel
* Bits 6 and 7 of GPIOH change as follows:
* Clockwise rotation 01 -> 00 -> 10 -> 11
* Counter-clockwise 11 -> 10 -> 00 -> 01
*
* This is equivalent to wheel_value of:
* Clockwise rotation 0x40 -> 0x00 -> 0x80 -> 0xc0
* Counter-clockwise 0xc0 -> 0x80 -> 0x00 -> 0x40
*/
new_wheel_value = GPIOH_INPUT_VAL & 0xc0;
switch(new_wheel_value){
case 0x00:
if(old_wheel_value==0x80)
btn |= BUTTON_SCROLL_UP;
else if (old_wheel_value==0x40)
btn |= BUTTON_SCROLL_DOWN;
break;
case 0x40:
if(old_wheel_value==0x00)
btn |= BUTTON_SCROLL_UP;
else if (old_wheel_value==0xc0)
btn |= BUTTON_SCROLL_DOWN;
break;
case 0x80:
if(old_wheel_value==0xc0)
btn |= BUTTON_SCROLL_UP;
else if (old_wheel_value==0x00)
btn |= BUTTON_SCROLL_DOWN;
break;
case 0xc0:
if(old_wheel_value==0x40)
btn |= BUTTON_SCROLL_UP;
else if (old_wheel_value==0x80)
btn |= BUTTON_SCROLL_DOWN;
break;
}
if(wheel_repeat == BUTTON_NONE){
if(btn & BUTTON_SCROLL_UP)
wheel_repeat = BUTTON_SCROLL_UP;
if(btn & BUTTON_SCROLL_DOWN)
wheel_repeat = BUTTON_SCROLL_DOWN;
} else if (wheel_repeat == BUTTON_SCROLL_UP) {
btn |= BUTTON_SCROLL_UP;
wheel_repeat = BUTTON_NONE;
} else if (wheel_repeat == BUTTON_SCROLL_DOWN) {
btn |= BUTTON_SCROLL_DOWN;
wheel_repeat = BUTTON_NONE;
}
old_wheel_value = new_wheel_value;
}
if( (btn & BUTTON_SCROLL_UP) || (btn & BUTTON_SCROLL_DOWN) ){
/* only trigger once per click */
if ((new_wheel_value == 0x00) || (new_wheel_value == 0xc0))
{
btn = btn&(~(BUTTON_SCROLL_UP|BUTTON_SCROLL_DOWN));
}
#ifndef BOOTLOADER
button_backlight_on();
#endif
}
return btn;
}
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