a69b53dc89
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11807 a1c6a512-1295-4272-9138-f99709370657
173 lines
5.1 KiB
C
173 lines
5.1 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) 2006 by Barry Wardell
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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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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/* Taken from button-h10.c by Barry Wardell and reverse engineering by MrH. */
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#include <stdlib.h>
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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 "kernel.h"
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#include "backlight.h"
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#include "system.h"
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static unsigned int old_wheel_value = 0;
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static unsigned int wheel_repeat = BUTTON_NONE;
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/* Wheel backlight control */
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#define WHEEL_BACKLIGHT_TIMEOUT 5*HZ;
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static unsigned int wheel_backlight_timer;
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void wheel_backlight_on(bool enable)
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{
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if(enable)
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GPIOG_OUTPUT_VAL |=0x80;
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else
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GPIOG_OUTPUT_VAL &=~ 0x80;
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}
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void button_init_device(void)
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{
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/* Enable all buttons */
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GPIOF_ENABLE |= 0xff;
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GPIOH_ENABLE |= 0xc0;
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/* Scrollwheel light - enable control through GPIOG pin 7 and set timeout */
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GPIOG_ENABLE = 0x80;
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GPIOG_OUTPUT_EN |= 0x80;
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wheel_backlight_timer = WHEEL_BACKLIGHT_TIMEOUT;
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/* Read initial wheel value (bit 6-7 of GPIOH) */
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old_wheel_value = GPIOH_INPUT_VAL & 0xc0;
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}
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bool button_hold(void)
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{
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return (GPIOF_INPUT_VAL & 0x80)?true: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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unsigned char state;
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static bool hold_button = false;
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bool hold_button_old;
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unsigned int new_wheel_value;
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/* Hold */
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hold_button_old = hold_button;
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hold_button = button_hold();
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#if 0
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#ifndef BOOTLOADER
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/* light handling */
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if (hold_button != hold_button_old)
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{
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backlight_hold_changed(hold_button);
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}
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#endif
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#endif
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/* device buttons */
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if (!hold_button)
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{
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/* Read normal buttons */
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state = GPIOF_INPUT_VAL & 0xff;
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if ((state & 0x1) == 0) btn |= BUTTON_REC;
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if ((state & 0x2) == 0) btn |= BUTTON_DOWN;
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if ((state & 0x4) == 0) btn |= BUTTON_RIGHT;
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if ((state & 0x8) == 0) btn |= BUTTON_LEFT;
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if ((state & 0x10) == 0) btn |= BUTTON_SELECT; /* The centre button */
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if ((state & 0x20) == 0) btn |= BUTTON_UP; /* The "play" button */
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if ((state & 0x40) != 0) btn |= BUTTON_POWER;
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/* Read wheel
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* Bits 6 and 7 of GPIOH change as follows:
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* Clockwise rotation 01 -> 00 -> 10 -> 11
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* Counter-clockwise 11 -> 10 -> 00 -> 01
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*
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* This is equivalent to wheel_value of:
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* Clockwise rotation 0x40 -> 0x00 -> 0x80 -> 0xc0
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* Counter-clockwise 0xc0 -> 0x80 -> 0x00 -> 0x40
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*/
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new_wheel_value = GPIOH_INPUT_VAL & 0xc0;
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switch(new_wheel_value){
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case 0x00:
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if(old_wheel_value==0x80)
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btn |= BUTTON_SCROLL_UP;
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else if (old_wheel_value==0x40)
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btn |= BUTTON_SCROLL_DOWN;
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break;
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case 0x40:
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if(old_wheel_value==0x00)
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btn |= BUTTON_SCROLL_UP;
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else if (old_wheel_value==0xc0)
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btn |= BUTTON_SCROLL_DOWN;
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break;
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case 0x80:
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if(old_wheel_value==0xc0)
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btn |= BUTTON_SCROLL_UP;
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else if (old_wheel_value==0x00)
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btn |= BUTTON_SCROLL_DOWN;
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break;
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case 0xc0:
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if(old_wheel_value==0x40)
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btn |= BUTTON_SCROLL_UP;
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else if (old_wheel_value==0x80)
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btn |= BUTTON_SCROLL_DOWN;
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break;
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}
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if(wheel_repeat == BUTTON_NONE){
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if(btn & BUTTON_SCROLL_UP)
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wheel_repeat = BUTTON_SCROLL_UP;
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if(btn & BUTTON_SCROLL_DOWN)
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wheel_repeat = BUTTON_SCROLL_DOWN;
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} else if (wheel_repeat == BUTTON_SCROLL_UP) {
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btn |= BUTTON_SCROLL_UP;
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wheel_repeat = BUTTON_NONE;
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} else if (wheel_repeat == BUTTON_SCROLL_DOWN) {
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btn |= BUTTON_SCROLL_DOWN;
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wheel_repeat = BUTTON_NONE;
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}
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old_wheel_value = new_wheel_value;
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}
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if(wheel_backlight_timer>0){
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wheel_backlight_timer--;
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if(wheel_backlight_timer==0){
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wheel_backlight_on(false);
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}
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}
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if( (btn & BUTTON_SCROLL_UP) || (btn & BUTTON_SCROLL_DOWN) ){
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if(wheel_backlight_timer==0){
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wheel_backlight_on(true);
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}
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wheel_backlight_timer = WHEEL_BACKLIGHT_TIMEOUT;
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}
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return btn;
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}
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