182 lines
5.0 KiB
C
182 lines
5.0 KiB
C
/***************************************************************************
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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) 2010 Marcin Bukat
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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 "cpu.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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static bool remote_detect(void)
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{
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/* When there is no remote adc readout
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* is exactly 0. We add some margin
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* for ADC readout instability
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*/
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return adc_scan(ADC_REMOTE)>10?true:false;
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}
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void button_init_device(void)
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{
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/* GPIO56 (main PLAY) general input
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* GPIO41 (remote PLAY) is shared with Audio Serial Data
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*/
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or_l((1<<24),&GPIO1_FUNCTION);
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and_l(~(1<<24),&GPIO1_ENABLE);
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}
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bool button_hold(void)
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{
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/* GPIO36 active high */
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return (GPIO1_READ & (1<<4))?true:false;
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}
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bool remote_button_hold(void)
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{
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/* On my remote hold gives readout of 44 */
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if (remote_detect())
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return adc_scan(ADC_REMOTE)<50?true:false;
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else
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return false;
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}
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/*
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* Get button pressed from hardware
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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 = 0;
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static bool hold_button = false;
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bool remote_hold_button = false;
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bool hold_button_old;
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bool remote_present;
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/* check if we have remote connected */
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remote_present = remote_detect();
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/* read hold buttons status */
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hold_button_old = hold_button;
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hold_button = button_hold();
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remote_hold_button = remote_button_hold();
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#ifndef BOOTLOADER
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/* Only main hold affects backlight */
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if (hold_button != hold_button_old)
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backlight_hold_changed(hold_button);
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#endif
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/* Skip if main hold is active */
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if (!hold_button)
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{
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data = adc_scan(ADC_BUTTONS);
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if (data < 2300) /* valid button */
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{
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if (data < 900) /* middle */
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{
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if (data < 500)
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{
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if (data > 200)
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/* 200 - 500 */
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btn = BUTTON_REC;
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}
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else /* 900 - 500 */
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btn = BUTTON_VOL_DOWN;
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}
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else /* 2250 - 900 */
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{
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if (data < 1600)
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{
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/* 1600 - 900 */
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if (data < 1200)
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/* 1200 - 900 */
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btn = BUTTON_VOL_UP;
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else /* 1600 - 1200 */
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btn = BUTTON_FF;
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}
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else /* 1600 - 2250 */
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{
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if (data < 1900)
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/* 1900 - 1600 */
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btn = BUTTON_REW;
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else /* 1900 - 2300 */
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btn = BUTTON_FUNC;
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}
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}
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}
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}
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/* Skip if remote is not present or remote_hold is active */
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if (remote_present && !remote_hold_button)
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{
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data = adc_scan(ADC_REMOTE);
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if (data < 2050) /* valid button */
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{
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if (data < 950) /* middle */
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{
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if (data < 650)
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{
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if (data < 400)
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{
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if (data > 250)
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/* 250 - 400 */
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btn = BUTTON_RC_VOL_DOWN;
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}
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else /* 650 - 400 */
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btn = BUTTON_RC_VOL_UP;
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}
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else /* 950 - 650 */
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btn = BUTTON_RC_FF;
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}
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else /* 2050 - 950 */
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{
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if (data < 1900)
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{
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if (data < 1350)
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/* 1350 - 900 */
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btn = BUTTON_RC_REW;
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}
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else /* 2050 - 1900 */
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btn = BUTTON_RC_FUNC;
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}
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}
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}
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/* PLAY buttons (both remote and main) are
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* GPIOs not ADC
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*/
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data = GPIO1_READ;
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/* GPIO56 active high main PLAY/PAUSE/ON */
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if (!hold_button && ((data & (1<<24))))
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btn |= BUTTON_PLAY;
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/* GPIO41 active high remote PLAY/PAUSE/ON */
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if (remote_present && !remote_hold_button && ((data & (1<<9))))
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btn |= BUTTON_RC_PLAY;
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return btn;
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}
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