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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2009 Bertrik Sikken
* Copyright (C) 2008 François Dinel
* Copyright © 2008-2009 Rafaël Carré
*
* 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 "system.h"
#include "button-target.h"
#include "as3525v2.h"
#ifndef BOOTLOADER
#include "backlight.h"
#endif
void button_init_device(void)
{
GPIOA_DIR &= ~((1<<7) | (1<<3));
GPIOD_DIR &= ~((1<<2) | (1<<1) | (1<<0));
GPIOD_PIN(3) = 1<<3;
GPIOD_PIN(4) = 1<<4;
GPIOD_PIN(5) = 1<<5;
GPIOD_DIR |= ((1<<5) | (1<<4) | (1<<3));
/* get initial readings */
button_read_device();
button_read_device();
button_read_device();
}
int button_read_device(void)
{
static int row = 0;
static int buttons = 0;
static unsigned power_counter = 0;
if(button_hold())
{
power_counter = HZ;
return 0;
}
/* direct GPIO connections */
/* read power, but not if hold button was just released, since
* you basically always hit power due to the slider mechanism after
* releasing hold (wait 1 sec) */
if (power_counter)
power_counter--;
if (GPIOA_PIN(7) && !power_counter)
buttons |= BUTTON_POWER;
else
buttons &= ~BUTTON_POWER;
/* This is a keypad using D3-D5 as columns and D0-D2 as rows */
switch (row) {
case 0:
buttons &= ~(BUTTON_VOL_UP | BUTTON_UP);
(void)GPIOD_PIN(0); /* D3D0 is unused */
if (!GPIOD_PIN(1))
buttons |= BUTTON_VOL_UP;
if (!GPIOD_PIN(2))
buttons |= BUTTON_UP;
GPIOD_PIN(3) = 1<<3;
GPIOD_PIN(4) = 0x00;
row++;
break;
case 1:
buttons &= ~(BUTTON_LEFT | BUTTON_SELECT | BUTTON_RIGHT);
if (!GPIOD_PIN(0))
buttons |= BUTTON_LEFT;
if (!GPIOD_PIN(1))
buttons |= BUTTON_SELECT;
if (!GPIOD_PIN(2))
buttons |= BUTTON_RIGHT;
GPIOD_PIN(4) = 1<<4;
GPIOD_PIN(5) = 0x00;
row++;
break;
case 2:
buttons &= ~(BUTTON_DOWN | BUTTON_VOL_DOWN | BUTTON_HOME);
if (!GPIOD_PIN(0))
buttons |= BUTTON_DOWN;
if (!GPIOD_PIN(1))
buttons |= BUTTON_VOL_DOWN;
if (!GPIOD_PIN(2))
buttons |= BUTTON_HOME;
GPIOD_PIN(5) = 1<<5;
GPIOD_PIN(3) = 0x00;
default:
row = 0;
break;
}
return buttons;
}
bool button_hold(void)
{
#ifndef BOOTLOADER
static bool hold_button_old = false;
#endif
GPIOA_DIR |= 1<<7;
GPIOA_PIN(7) = 1<<7;
int delay = 50;
while(delay--)
asm("nop");
bool hold_button = (GPIOA_PIN(3) != 0);
GPIOA_PIN(7) = 0;
GPIOA_DIR &= ~(1<<7);
#ifndef BOOTLOADER
/* light handling */
if (hold_button != hold_button_old)
{
hold_button_old = hold_button;
backlight_hold_changed(hold_button);
}
#endif /* BOOTLOADER */
return hold_button;
}
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