66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2006 by Jens Arnold
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "system.h"
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#include "button.h"
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#include "backlight.h"
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#include "adc.h"
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/*
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Ondio hardware button hookup
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============================
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LEFT, RIGHT, UP, DOWN: connected to AN4 through a resistor network
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The voltage on AN4 depends on which keys (or key combo) is pressed
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OPTION: AN2, high active (assigned as MENU)
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ON/OFF: AN3, low active (assigned as OFF)
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*/
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int button_read_device(void)
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{
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int btn = BUTTON_NONE;
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int data;
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/* Check the 4 direction keys */
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data = adc_read(ADC_BUTTON_ROW1);
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if (data >= 165)
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{
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if (data >= 585)
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if (data >= 755)
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btn = BUTTON_LEFT;
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else
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btn = BUTTON_RIGHT;
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else
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if (data >= 415)
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btn = BUTTON_UP;
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else
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btn = BUTTON_DOWN;
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}
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if(adc_read(ADC_BUTTON_OPTION) > 0x200) /* active high */
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btn |= BUTTON_MENU;
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if(adc_read(ADC_BUTTON_ONOFF) < 0x120) /* active low */
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btn |= BUTTON_OFF;
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return btn;
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}
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