75 lines
2.2 KiB
C
75 lines
2.2 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) 2013 Andrew Ryabinin
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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 "system.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 "pca9555.h"
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extern unsigned short pca9555_in_ports;
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/* upper bounds of key's voltage values */
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#define ADV_KEYUP 0x05B + 0x10
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#define ADV_KEYDOWN 0x0F3 + 0x10
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#define ADV_KEYLEFT 0x190 + 0x10
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#define ADV_KEYRIGHT 0x22C + 0x10
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#define ADV_KEYMENU 0x2CA + 0x10
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void button_init_device(void) {
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GPIO_PCCON &= ~(1<<1);
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pca9555_init();
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}
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int button_read_device(void) {
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int adc_val = adc_read(ADC_BUTTONS);
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int button = 0;
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if (adc_val < ADV_KEYLEFT) {
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if (adc_val < ADV_KEYDOWN) {
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if (adc_val < ADV_KEYUP) {
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button = BUTTON_UP;
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} else {
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button = BUTTON_DOWN;
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}
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} else {
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button = BUTTON_LEFT;
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}
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} else {
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if (adc_val < ADV_KEYRIGHT) {
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button = BUTTON_RIGHT;
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} else if (adc_val < ADV_KEYMENU) {
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button = BUTTON_MENU;
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}
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}
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if (GPIO_PCDR & (1<<1)) {
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button |= BUTTON_PLAY;
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}
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if (((GPIO_PFDR&(1<<2)) == 0) &&
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((pca9555_in_ports & (1<<15)) == 0)) {
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button |= BUTTON_BACK;
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}
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return button;
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}
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