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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Rob Purchase
*
* 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"
#include "backlight.h"
#include "touchscreen-target.h"
#include <stdlib.h>
void button_init_device(void)
{
/* Configure GPIOA 4 (POWER) and 8 (HOLD) for input */
GPIOA_DIR &= ~0x110;
/* Configure GPIOB 4 (button pressed) for input */
GPIOB_DIR &= ~0x10;
touchscreen_init_device();
}
bool button_hold(void)
{
return (GPIOA & 0x8) ? false : true;
}
int button_read_device(int *data)
{
int btn = BUTTON_NONE;
int adc;
static int old_data = 0;
static bool hold_button = false;
bool hold_button_old;
*data = old_data;
hold_button_old = hold_button;
hold_button = button_hold();
#ifndef BOOTLOADER
if (hold_button != hold_button_old)
backlight_hold_changed(hold_button);
#endif
if (hold_button)
return BUTTON_NONE;
if (GPIOB & 0x4)
{
adc = adc_read(ADC_BUTTONS);
/* The following contains some arbitrary, but working, guesswork */
if (adc < 0x038) {
btn |= (BUTTON_MINUS | BUTTON_PLUS | BUTTON_MENU);
} else if (adc < 0x048) {
btn |= (BUTTON_MINUS | BUTTON_PLUS);
} else if (adc < 0x058) {
btn |= (BUTTON_PLUS | BUTTON_MENU);
} else if (adc < 0x070) {
btn |= BUTTON_PLUS;
} else if (adc < 0x090) {
btn |= (BUTTON_MINUS | BUTTON_MENU);
} else if (adc < 0x150) {
btn |= BUTTON_MINUS;
} else if (adc < 0x200) {
btn |= BUTTON_MENU;
}
}
btn |= touchscreen_read_device(data, &old_data);
if (!(GPIOA & 0x4))
btn |= BUTTON_POWER;
if (btn & BUTTON_TOUCHSCREEN && !is_backlight_on(true))
old_data = *data = 0;
return btn;
}
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