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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2010 Marcin Bukat
*
* 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 "system.h"
#include "button.h"
#include "backlight.h"
#include "adc.h"
static bool remote_detect(void)
{
/* When there is no remote adc readout
* is exactly 0. We add some margin
* for ADC readout instability
*/
return adc_scan(ADC_REMOTE)>10?true:false;
}
void button_init_device(void)
{
/* GPIO56 (main PLAY) general input
* GPIO41 (remote PLAY) is shared with Audio Serial Data
*/
or_l((1<<24),&GPIO1_FUNCTION);
and_l(~(1<<24),&GPIO1_ENABLE);
}
bool button_hold(void)
{
/* GPIO36 active high */
return (GPIO1_READ & (1<<4))?true:false;
}
bool remote_button_hold(void)
{
/* On my remote hold gives readout of 44 */
if (remote_detect())
return adc_scan(ADC_REMOTE)<50?true:false;
else
return false;
}
/*
* Get button pressed from hardware
*/
int button_read_device(void)
{
int btn = BUTTON_NONE;
int data = 0;
static bool hold_button = false;
bool remote_hold_button = false;
#ifndef BOOTLOADER
bool hold_button_old;
#endif
bool remote_present;
/* check if we have remote connected */
remote_present = remote_detect();
/* read hold buttons status */
#ifndef BOOTLOADER
hold_button_old = hold_button;
#endif
hold_button = button_hold();
remote_hold_button = remote_button_hold();
#ifndef BOOTLOADER
/* Only main hold affects backlight */
if (hold_button != hold_button_old)
backlight_hold_changed(hold_button);
#endif
/* Skip if main hold is active */
if (!hold_button)
{
data = adc_scan(ADC_BUTTONS);
if (data < 2300) /* valid button */
{
if (data < 900) /* middle */
{
if (data < 500)
{
if (data > 200)
/* 200 - 500 */
btn = BUTTON_REC;
}
else /* 900 - 500 */
btn = BUTTON_VOL_DOWN;
}
else /* 2250 - 900 */
{
if (data < 1600)
{
/* 1600 - 900 */
if (data < 1200)
/* 1200 - 900 */
btn = BUTTON_VOL_UP;
else /* 1600 - 1200 */
btn = BUTTON_FF;
}
else /* 1600 - 2250 */
{
if (data < 1900)
/* 1900 - 1600 */
btn = BUTTON_REW;
else /* 1900 - 2300 */
btn = BUTTON_FUNC;
}
}
}
}
/* Skip if remote is not present or remote_hold is active */
if (remote_present && !remote_hold_button)
{
data = adc_scan(ADC_REMOTE);
if (data < 2050) /* valid button */
{
if (data < 950) /* middle */
{
if (data < 650)
{
if (data < 400)
{
if (data > 250)
/* 250 - 400 */
btn = BUTTON_RC_VOL_DOWN;
}
else /* 650 - 400 */
btn = BUTTON_RC_VOL_UP;
}
else /* 950 - 650 */
btn = BUTTON_RC_FF;
}
else /* 2050 - 950 */
{
if (data < 1900)
{
if (data < 1350)
/* 1350 - 900 */
btn = BUTTON_RC_REW;
}
else /* 2050 - 1900 */
btn = BUTTON_RC_FUNC;
}
}
}
/* PLAY buttons (both remote and main) are
* GPIOs not ADC
*/
data = GPIO1_READ;
/* GPIO56 active high main PLAY/PAUSE/ON */
if (!hold_button && ((data & (1<<24))))
btn |= BUTTON_PLAY;
/* GPIO41 active high remote PLAY/PAUSE/ON */
if (remote_present && !remote_hold_button && ((data & (1<<9))))
btn |= BUTTON_RC_PLAY;
return btn;
}
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