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- Unnamed
- Friday, December 15th, 2006 at 12:20:09pm MST
- /***************************************************************************
- * __________ __ ___.
- * Open \______ \ ____ ____ | | _\_ |__ _______ ___
- * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
- * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
- * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
- * \/ \/ \/ \/ \/
- * $Id: button-e200.c,v 1.2 2006-10-16 00:18:49 dan_a Exp $
- *
- * Copyright (C) 2006 by Barry Wardell
- *
- * All files in this archive are subject to the GNU General Public License.
- * See the file COPYING in the source tree root for full license agreement.
- *
- * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
- * KIND, either express or implied.
- *
- ****************************************************************************/
- /* Taken from button-h10.c by Barry Wardell and reverse engineering by MrH. */
- #include <stdlib.h>
- #include "config.h"
- #include "cpu.h"
- #include "system.h"
- #include "button.h"
- #include "kernel.h"
- #include "backlight.h"
- #include "system.h"
- static unsigned int old_wheel_value = 0;
- static unsigned int wheel_repeat = BUTTON_NONE;
- void button_init_device(void)
- {
- /* Enable all buttons */
- GPIOF_ENABLE |= 0xff;
- GPIOH_ENABLE |= 0xc0;
- /* Read initial wheel value (bit 6-7 of GPIOH) */
- old_wheel_value = GPIOH_INPUT_VAL & 0xc0;
- }
- bool button_hold(void)
- {
- return (GPIOF_INPUT_VAL & 0x80)?true:false;
- }
- /*
- * Get button pressed from hardware
- */
- int button_read_device(void)
- {
- int btn = BUTTON_NONE;
- unsigned char state;
- static bool hold_button = false;
- bool hold_button_old;
- unsigned int new_wheel_value;
- /* Hold */
- hold_button_old = hold_button;
- hold_button = button_hold();
- #if 0
- #ifndef BOOTLOADER
- /* light handling */
- if (hold_button != hold_button_old)
- {
- backlight_hold_changed(hold_button);
- }
- #endif
- #endif
- /* device buttons */
- if (!hold_button)
- {
- /* Read normal buttons */
- state = GPIOF_INPUT_VAL & 0xff;
- if ((state & 0x1) == 0) btn |= BUTTON_REC;
- if ((state & 0x2) == 0) btn |= BUTTON_DOWN;
- if ((state & 0x4) == 0) btn |= BUTTON_RIGHT;
- if ((state & 0x8) == 0) btn |= BUTTON_LEFT;
- if ((state & 0x10) == 0) btn |= BUTTON_SELECT; /* The centre button */
- if ((state & 0x20) == 0) btn |= BUTTON_UP; /* The "play" button */
- if ((state & 0x40) != 0) btn |= BUTTON_POWER;
- /* Read wheel
- * Bits 6 and 7 of GPIOH change as follows:
- * Clockwise rotation 01 -> 00 -> 10 -> 11
- * Counter-clockwise 11 -> 10 -> 00 -> 01
- *
- * This is equivalent to wheel_value of:
- * Clockwise rotation 0x40 -> 0x00 -> 0x80 -> 0xc0
- * Counter-clockwise 0xc0 -> 0x80 -> 0x00 -> 0x40
- */
- new_wheel_value = GPIOH_INPUT_VAL & 0xc0;
- switch(new_wheel_value){
- case 0x00:
- if(old_wheel_value==0x80)
- btn |= BUTTON_SCROLL_UP;
- else if (old_wheel_value==0x40)
- btn |= BUTTON_SCROLL_DOWN;
- break;
- case 0x40:
- if(old_wheel_value==0x00)
- btn |= BUTTON_SCROLL_UP;
- else if (old_wheel_value==0xc0)
- btn |= BUTTON_SCROLL_DOWN;
- break;
- case 0x80:
- if(old_wheel_value==0xc0)
- btn |= BUTTON_SCROLL_UP;
- else if (old_wheel_value==0x00)
- btn |= BUTTON_SCROLL_DOWN;
- break;
- case 0xc0:
- if(old_wheel_value==0x40)
- btn |= BUTTON_SCROLL_UP;
- else if (old_wheel_value==0x80)
- btn |= BUTTON_SCROLL_DOWN;
- break;
- }
- if(wheel_repeat == BUTTON_NONE){
- if(btn & BUTTON_SCROLL_UP)
- wheel_repeat = BUTTON_SCROLL_UP;
- if(btn & BUTTON_SCROLL_DOWN)
- wheel_repeat = BUTTON_SCROLL_DOWN;
- } else if (wheel_repeat == BUTTON_SCROLL_UP) {
- btn |= BUTTON_SCROLL_UP;
- wheel_repeat = BUTTON_NONE;
- } else if (wheel_repeat == BUTTON_SCROLL_DOWN) {
- btn |= BUTTON_SCROLL_DOWN;
- wheel_repeat = BUTTON_NONE;
- }
- old_wheel_value = new_wheel_value;
- }
- return btn;
- }
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