124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
|
/***************************************************************************
|
||
|
|
* __________ __ ___.
|
||
|
|
* 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"
|
||
|
|
|
||
|
|
void button_init_device(void)
|
||
|
|
{
|
||
|
|
/* Set GPIO36, GPIO56 as general purpose inputs */
|
||
|
|
or_l((1<<4)|(1<<24),&GPIO1_FUNCTION);
|
||
|
|
and_l(~((1<<4)|(1<<24)),&GPIO1_ENABLE);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool button_hold(void)
|
||
|
|
{
|
||
|
|
/* GPIO36 active high */
|
||
|
|
return (GPIO1_READ & (1<<4))?true:false;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Get button pressed from hardware
|
||
|
|
*/
|
||
|
|
int button_read_device(void)
|
||
|
|
{
|
||
|
|
int btn = BUTTON_NONE;
|
||
|
|
int data = 0;
|
||
|
|
static bool hold_button = false;
|
||
|
|
|
||
|
|
/* for moving average filter */
|
||
|
|
static unsigned short button_filter[4];
|
||
|
|
static unsigned char index;
|
||
|
|
|
||
|
|
bool hold_button_old;
|
||
|
|
|
||
|
|
/* normal buttons */
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
|
||
|
|
/* simple moving average filter with 4 item window */
|
||
|
|
button_filter[index&0x03] = adc_scan(ADC_BUTTONS);
|
||
|
|
index++;
|
||
|
|
|
||
|
|
data = (button_filter[0]+button_filter[1] \
|
||
|
|
+button_filter[2]+button_filter[3])>>2;
|
||
|
|
|
||
|
|
|
||
|
|
if (data < 2250) // 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_NEXT;
|
||
|
|
}
|
||
|
|
else /* 1600 - 2250 */
|
||
|
|
{
|
||
|
|
if (data < 1900)
|
||
|
|
/* 1900 - 1600 */
|
||
|
|
btn = BUTTON_PREV;
|
||
|
|
else /* 1900 - 2250 */
|
||
|
|
btn = BUTTON_SELECT;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
data = GPIO1_READ;
|
||
|
|
|
||
|
|
/* GPIO56 active high main PLAY/PAUSE/ON */
|
||
|
|
if (!hold_button && ((data & (1<<24))))
|
||
|
|
btn |= BUTTON_PLAY;
|
||
|
|
|
||
|
|
return btn;
|
||
|
|
}
|