95cf63b294
no need to define BUTTON_REMOTE anymore git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31620 a1c6a512-1295-4272-9138-f99709370657
84 lines
2.4 KiB
C
84 lines
2.4 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 François Dinel
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* Copyright © 2008-2009 Rafaël Carré
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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 "button.h"
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#include "as3525v2.h"
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#include "system.h"
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#include "kernel.h"
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static int keyscan(void)
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{
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static int buttons, row;
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static const int matrix[2][3] = {
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{ BUTTON_RIGHT, BUTTON_SELECT, BUTTON_UP },
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{ BUTTON_HOME, BUTTON_DOWN, BUTTON_LEFT },
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};
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for (int i = 0; i < 3; i++)
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if (GPIOC_PIN(3 + i))
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buttons |= matrix[row][i];
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else
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buttons &= ~matrix[row][i];
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/* prepare next row */
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GPIOC_PIN(1) = row << 1;
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row ^= 1;
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GPIOC_PIN(2) = row << 2;
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/* delay a bit if interrupts are disabled, to be sure next row will read */
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if (!irq_enabled())
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for (volatile int i = 0; i < 0x500; i++) ;
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return buttons;
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}
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void button_init_device(void)
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{
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/* GPIO A6, A7 and D6 are direct button inputs */
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GPIOA_DIR &= ~(1 << 6 | 1<< 7);
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GPIOD_DIR &= ~(1 << 6);
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/* GPIO C1, C2, C3, C4, C5 are used in a column/row key scan matrix */
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GPIOC_DIR |= ((1 << 1) | (1 << 2));
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GPIOC_DIR &= ~((1 << 3) | (1 << 4) | (1 << 5));
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/* initial reading */
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button_read_device();
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sleep(1);
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button_read_device();
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sleep(1);
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}
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int button_read_device(void)
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{
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int buttons = 0;
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if (GPIOD_PIN(6))
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buttons |= BUTTON_POWER;
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if (GPIOA_PIN(6))
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buttons |= BUTTON_VOL_DOWN;
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if (GPIOA_PIN(7))
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buttons |= BUTTON_VOL_UP;
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return buttons | keyscan();
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}
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