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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Dave Chapman
*
* 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"
/*
Results of button testing (viewing ADC values whilst pressing buttons):
HOLD: GPIOB & 0x0200 (0=hold active, 0x0200 = hold inactive)
ADC[1]: (approx values)
Idle - 0x3ff
MENU - unknown
REPEAT/AB - 0x03?
LEFT - 0x07?-0x08?
SELECT - 0x0c?
RIGHT - 0x11?
PLAY/PAUSE - 0x17?-0x018?
VOL UP - 0x1e?-0x01f?
VOL DOWN - 0x26?
*/
void button_init_device(void)
{
/* Nothing to do */
}
int button_read_device(void)
{
int btn = BUTTON_NONE;
int adc;
/* TODO - determine how to detect BUTTON_MENU - it doesn't appear to
be connected to a GPIO or to an ADC
*/
adc = adc_read(ADC_BUTTONS);
if (adc < 0x384) {
if (adc < 0x140) {
if (adc < 0x96) {
if (adc < 0x50) {
btn |= BUTTON_REPEATAB; /* 0x00..0x4f */
} else {
btn |= BUTTON_LEFT; /* 0x50..0x95 */
}
} else {
if (adc < 0xe0) {
btn |= BUTTON_SELECT; /* 0x96..0xdf */
} else {
btn |= BUTTON_RIGHT; /* 0xe0..0x13f */
}
}
} else {
if (adc < 0x208) {
if (adc < 0x1b0) {
btn |= BUTTON_PLAYPAUSE; /* 0x140..0x1af */
} else {
btn |= BUTTON_VOLUP; /* 0x1b0..0x207 */
}
} else {
btn |= BUTTON_VOLDOWN; /* 0x209..0x383 */
}
}
}
return btn;
}
bool button_hold(void)
{
return (GPIOB & 0x200)?false:true;
}
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