145 lines
3.6 KiB
C
145 lines
3.6 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) 2009 Bertrik Sikken
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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 "system.h"
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#include "kernel.h"
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#include "button.h"
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#include "as3525v2.h"
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#ifndef BOOTLOADER
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#include "backlight.h"
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#endif
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#if defined(SANSA_CLIP)
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# define OUT_PIN GPIOC_PIN
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# define OUT_DIR GPIOC_DIR
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# define INITIAL 0
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# define IN_PIN GPIOB_PIN
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# define IN_DIR GPIOB_DIR
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#elif defined(SANSA_CLIPV2)
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# define OUT_PIN GPIOD_PIN
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# define OUT_DIR GPIOD_DIR
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# define INITIAL 1
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# define IN_PIN GPIOD_PIN
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# define IN_DIR GPIOD_DIR
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#endif
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static const int rows[3] = {
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#if defined(SANSA_CLIP)
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4, 5, 6
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#elif defined(SANSA_CLIPV2)
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3, 4, 5
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#endif
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};
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void button_init_device(void)
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{
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GPIOA_DIR &= ~((1<<7) | (1<<3));
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CCU_IO &= ~(3<<2);
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IN_DIR &= ~((1<<2) | (1<<1) | (1<<0));
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for (int i = 0; i < 3; i++) {
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OUT_PIN(rows[i]) = INITIAL << rows[i];
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OUT_DIR |= 1 << rows[i];
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}
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/* get initial readings */
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button_read_device();
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button_read_device();
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button_read_device();
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}
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int button_read_device(void)
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{
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static int row, buttons;
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static unsigned power_counter;
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if(button_hold())
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{
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power_counter = HZ;
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return 0;
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}
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/* direct GPIO connections */
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/* read power, but not if hold button was just released, since
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* you basically always hit power due to the slider mechanism after
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* releasing hold (wait 1 sec) */
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if (power_counter)
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power_counter--;
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if (GPIOA_PIN(7) && !power_counter)
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buttons |= BUTTON_POWER;
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else
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buttons &= ~BUTTON_POWER;
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static const int matrix [3][3] = {
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{ 0 /*unused*/, BUTTON_VOL_UP, BUTTON_UP },
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{ BUTTON_LEFT, BUTTON_SELECT, BUTTON_RIGHT },
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{ BUTTON_DOWN, BUTTON_VOL_DOWN, BUTTON_HOME },
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};
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for (int i = 0; i<3; i++)
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if (IN_PIN(i) ^ (INITIAL << 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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OUT_PIN(rows[row]) = INITIAL << rows[row];
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row++;
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row %= 3;
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OUT_PIN(rows[row]) = (!INITIAL) << rows[row];
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return buttons;
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}
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bool button_hold(void)
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{
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#ifdef SANSA_CLIPV2
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GPIOA_DIR |= 1<<7;
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GPIOA_PIN(7) = 1<<7;
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int delay = 50;
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while(delay--)
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asm("nop");
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#endif
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bool hold_button = (GPIOA_PIN(3) != 0);
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#ifdef SANSA_CLIPV2
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GPIOA_PIN(7) = 0;
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GPIOA_DIR &= ~(1<<7);
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#endif
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#ifndef BOOTLOADER
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static bool hold_button_old = false;
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/* light handling */
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if (hold_button != hold_button_old)
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{
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hold_button_old = hold_button;
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backlight_hold_changed(hold_button);
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}
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#endif /* BOOTLOADER */
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return hold_button;
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}
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