98 lines
2.7 KiB
C
98 lines
2.7 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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Recorder FM/V2 hardware button hookup
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=====================================
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F1, F2, F3, UP: connected to AN4 through a resistor network
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DOWN, PLAY, LEFT, RIGHT: likewise connected to AN5
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The voltage on AN4/ AN5 depends on which keys (or key combo) is pressed
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FM/V2 has PLAY and RIGHT switched compared to plain recorder
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ON: AN3, low active
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OFF: AN2, high active
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*/
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void button_init_device(void)
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{
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/* Set PB4 and PB8 as input pins */
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PBCR1 &= 0xfffc; /* PB8MD = 00 */
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PBCR2 &= 0xfcff; /* PB4MD = 00 */
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PBIOR &= ~0x0110; /* Inputs */
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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 F1..F3 and UP */
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data = adc_read(ADC_BUTTON_ROW1);
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if (data >= 150)
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{
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if (data >= 545)
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if (data >= 700)
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btn = BUTTON_F3;
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else
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btn = BUTTON_UP;
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else
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if (data >= 385)
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btn = BUTTON_F2;
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else
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btn = BUTTON_F1;
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}
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/* Some units have mushy keypads, so pressing UP also activates
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the Left/Right buttons. Let's combat that by skipping the AN5
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checks when UP is pressed. */
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if(!(btn & BUTTON_UP))
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{
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/* check DOWN, PLAY, LEFT, RIGHT */
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data = adc_read(ADC_BUTTON_ROW2);
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if (data >= 150)
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{
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if (data >= 545)
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if (data >= 700)
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btn |= BUTTON_DOWN;
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else
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btn |= BUTTON_RIGHT;
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else
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if (data >= 385)
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btn |= BUTTON_LEFT;
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else
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btn |= BUTTON_PLAY;
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}
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}
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if ( adc_read(ADC_BUTTON_ON) < 512 )
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btn |= BUTTON_ON;
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if ( adc_read(ADC_BUTTON_OFF) > 512 )
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btn |= BUTTON_OFF;
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return btn;
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}
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