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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Jens Arnold
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "system.h"
#include "button.h"
#include "backlight.h"
#include "adc.h"
/*
Recorder FM/V2 hardware button hookup
=====================================
F1, F2, F3, UP: connected to AN4 through a resistor network
DOWN, PLAY, LEFT, RIGHT: likewise connected to AN5
The voltage on AN4/ AN5 depends on which keys (or key combo) is pressed
FM/V2 has PLAY and RIGHT switched compared to plain recorder
ON: AN3, low active
OFF: AN2, high active
*/
void button_init_device(void)
{
/* Set PB4 and PB8 as input pins */
PBCR1 &= 0xfffc; /* PB8MD = 00 */
PBCR2 &= 0xfcff; /* PB4MD = 00 */
PBIOR &= ~0x0110; /* Inputs */
}
int button_read_device(void)
{
int btn = BUTTON_NONE;
int data;
/* check F1..F3 and UP */
data = adc_read(ADC_BUTTON_ROW1);
if (data >= 150)
{
if (data >= 545)
if (data >= 700)
btn = BUTTON_F3;
else
btn = BUTTON_UP;
else
if (data >= 385)
btn = BUTTON_F2;
else
btn = BUTTON_F1;
}
/* Some units have mushy keypads, so pressing UP also activates
the Left/Right buttons. Let's combat that by skipping the AN5
checks when UP is pressed. */
if(!(btn & BUTTON_UP))
{
/* check DOWN, PLAY, LEFT, RIGHT */
data = adc_read(ADC_BUTTON_ROW2);
if (data >= 150)
{
if (data >= 545)
if (data >= 700)
btn |= BUTTON_DOWN;
else
btn |= BUTTON_RIGHT;
else
if (data >= 385)
btn |= BUTTON_LEFT;
else
btn |= BUTTON_PLAY;
}
}
if ( adc_read(ADC_BUTTON_ON) < 512 )
btn |= BUTTON_ON;
if ( adc_read(ADC_BUTTON_OFF) > 512 )
btn |= BUTTON_OFF;
return btn;
}
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