103 lines
2.7 KiB
C
103 lines
2.7 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) 2008 by Rob Purchase
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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 "button.h"
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#include "adc.h"
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#include "backlight.h"
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#include "touchscreen-target.h"
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#include <stdlib.h>
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void button_init_device(void)
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{
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/* Configure GPIOA 4 (POWER) and 8 (HOLD) for input */
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GPIOA_DIR &= ~0x110;
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/* Configure GPIOB 4 (button pressed) for input */
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GPIOB_DIR &= ~0x10;
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touchscreen_init_device();
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}
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bool button_hold(void)
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{
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return (GPIOA & 0x8) ? false : true;
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}
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int button_read_device(int *data)
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{
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int btn = BUTTON_NONE;
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int adc;
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static int old_data = 0;
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static bool hold_button = false;
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#ifndef BOOTLOADER
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bool hold_button_old;
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#endif
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*data = old_data;
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#ifndef BOOTLOADER
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hold_button_old = hold_button;
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#endif
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hold_button = button_hold();
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#ifndef BOOTLOADER
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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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if (hold_button)
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return BUTTON_NONE;
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if (GPIOB & 0x4)
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{
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adc = adc_read(ADC_BUTTONS);
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/* The following contains some arbitrary, but working, guesswork */
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if (adc < 0x038) {
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btn |= (BUTTON_MINUS | BUTTON_PLUS | BUTTON_MENU);
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} else if (adc < 0x048) {
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btn |= (BUTTON_MINUS | BUTTON_PLUS);
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} else if (adc < 0x058) {
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btn |= (BUTTON_PLUS | BUTTON_MENU);
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} else if (adc < 0x070) {
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btn |= BUTTON_PLUS;
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} else if (adc < 0x090) {
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btn |= (BUTTON_MINUS | BUTTON_MENU);
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} else if (adc < 0x150) {
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btn |= BUTTON_MINUS;
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} else if (adc < 0x200) {
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btn |= BUTTON_MENU;
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}
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}
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btn |= touchscreen_read_device(data, &old_data);
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if (!(GPIOA & 0x4))
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btn |= BUTTON_POWER;
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if (btn & BUTTON_TOUCHSCREEN && !is_backlight_on(true))
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old_data = *data = 0;
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return btn;
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}
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