e5e41c3a82
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20699 a1c6a512-1295-4272-9138-f99709370657
290 lines
8.6 KiB
C
290 lines
8.6 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) 2006 by Barry Wardell
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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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/* Taken from button-h10.c by Barry Wardell and reverse engineering by MrH. */
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#include "system.h"
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#include "button.h"
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#include "backlight.h"
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#include "powermgmt.h"
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#define WHEEL_REPEAT_INTERVAL 300000
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#define WHEEL_FAST_ON_INTERVAL 20000
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#define WHEEL_FAST_OFF_INTERVAL 60000
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#define WHEELCLICKS_PER_ROTATION 48 /* wheelclicks per full rotation */
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static short _dbop_din;
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/* Clickwheel */
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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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static unsigned int wheel_click_count = 0;
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static unsigned int wheel_delta = 0;
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static int wheel_fast_mode = 0;
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static unsigned long last_wheel_usec = 0;
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static unsigned long wheel_velocity = 0;
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static long last_wheel_post = 0;
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static long next_backlight_on = 0;
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/* Buttons */
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static bool hold_button = false;
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#ifndef BOOTLOADER
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static bool hold_button_old = false;
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#endif
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extern bool lcd_button_support(void);
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void button_init_device(void)
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{
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}
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bool button_hold(void)
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{
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return hold_button;
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}
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static void scrollwheel(short dbop_din)
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{
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static const unsigned char wheel_tbl[2][4] =
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{
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{ 2, 0, 3, 1 }, /* Clockwise rotation */
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{ 1, 3, 0, 2 }, /* Counter-clockwise */
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};
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/* Read wheel
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* Bits 13 and 14 of DBOP_DIN change as follows:
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* Clockwise rotation 00 -> 01 -> 11 -> 10 -> 00
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* Counter-clockwise 00 -> 10 -> 11 -> 01 -> 00
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*/
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/* did the wheel value change? */
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unsigned int btn = BUTTON_NONE;
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unsigned wheel_value = dbop_din & (1<<13|1<<14);
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wheel_value >>= 13;
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if (old_wheel_value == wheel_tbl[0][wheel_value])
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btn = BUTTON_SCROLL_FWD;
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else if (old_wheel_value == wheel_tbl[1][wheel_value])
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btn = BUTTON_SCROLL_BACK;
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if (btn != BUTTON_NONE)
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{
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int repeat = 1; /* assume repeat */
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unsigned long usec = TIMER1_VALUE;
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unsigned v = (usec - last_wheel_usec) & 0x7fffffff;
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v = (v>0) ? 1000000 / v : 0; /* clicks/sec = 1000000 * +clicks/usec */
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v = (v>0xffffff) ? 0xffffff : v; /* limit to 24 bit */
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/* some velocity filtering to smooth things out */
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wheel_velocity = (7*wheel_velocity + v) / 8;
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if (btn != wheel_repeat)
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{
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/* direction reversals nullify all fast mode states */
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wheel_repeat = btn;
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repeat =
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wheel_fast_mode =
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wheel_velocity =
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wheel_click_count = 0;
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}
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if (wheel_fast_mode != 0)
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{
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/* fast OFF happens immediately when velocity drops below
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threshold */
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if (TIME_AFTER(usec,
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last_wheel_usec + WHEEL_FAST_OFF_INTERVAL))
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{
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/* moving out of fast mode */
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wheel_fast_mode = 0;
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/* reset velocity */
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wheel_velocity = 0;
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/* wheel_delta is always 1 in slow mode */
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wheel_delta = 1;
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}
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}
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else
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{
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/* fast ON gets filtered to avoid inadvertent jumps to fast mode */
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if (repeat && wheel_velocity > 1000000/WHEEL_FAST_ON_INTERVAL)
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{
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/* moving into fast mode */
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wheel_fast_mode = 1 << 31;
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wheel_click_count = 0;
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wheel_velocity = 1000000/WHEEL_FAST_OFF_INTERVAL;
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}
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else if (++wheel_click_count < 2)
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{
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btn = BUTTON_NONE;
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}
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/* wheel_delta is always 1 in slow mode */
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wheel_delta = 1;
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}
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if (TIME_AFTER(current_tick, next_backlight_on) ||
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v <= 4)
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{
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/* poke backlight to turn it on or maintain it no more often
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than every 1/4 second*/
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next_backlight_on = current_tick + HZ/4;
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backlight_on();
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buttonlight_on();
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reset_poweroff_timer();
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}
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if (btn != BUTTON_NONE)
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{
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wheel_click_count = 0;
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/* generate repeats if quick enough */
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if (repeat && TIME_BEFORE(usec,
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last_wheel_post + WHEEL_REPEAT_INTERVAL))
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btn |= BUTTON_REPEAT;
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last_wheel_post = usec;
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if (queue_empty(&button_queue))
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{
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queue_post(&button_queue, btn, wheel_fast_mode |
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(wheel_delta << 24) |
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wheel_velocity*360/WHEELCLICKS_PER_ROTATION);
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/* message posted - reset delta */
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wheel_delta = 1;
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}
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else
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{
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/* skipped post - increment delta */
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if (++wheel_delta > 0x7f)
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wheel_delta = 0x7f;
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}
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}
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last_wheel_usec = usec;
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}
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old_wheel_value = wheel_value;
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}
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short button_read_dbop(void)
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{
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/*write a red pixel */
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if (!lcd_button_support())
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return _dbop_din;
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/* Set up dbop for input */
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while (!(DBOP_STAT & (1<<10))); /* Wait for fifo to empty */
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DBOP_CTRL |= (1<<19); /* Tri-state DBOP on read cycle */
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DBOP_CTRL &= ~(1<<16); /* disable output (1:write enabled) */
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DBOP_TIMPOL_01 = 0xe167e167; /* Set Timing & Polarity regs 0 & 1 */
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DBOP_TIMPOL_23 = 0xe167006e; /* Set Timing & Polarity regs 2 & 3 */
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DBOP_CTRL |= (1<<15); /* start read */
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while (!(DBOP_STAT & (1<<16))); /* wait for valid data */
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_dbop_din = DBOP_DIN; /* Read dbop data*/
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/* Reset dbop for output */
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DBOP_TIMPOL_01 = 0x6e167; /* Set Timing & Polarity regs 0 & 1 */
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DBOP_TIMPOL_23 = 0xa167e06f; /* Set Timing & Polarity regs 2 & 3 */
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DBOP_CTRL |= (1<<16); /* Enable output (0:write disable) */
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DBOP_CTRL &= ~(1<<19); /* Tri-state when no active write */
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scrollwheel(_dbop_din);
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return _dbop_din;
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}
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short button_dbop_data(void)
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{
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return _dbop_din;
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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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/* read buttons from dbop */
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short dbop = button_read_dbop();
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/* hold button */
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if(dbop & (1<<12))
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{
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hold_button = true;
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return btn;
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}
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else
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{
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hold_button = false;
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}
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if (dbop & (1<<8))
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btn |= BUTTON_POWER;
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if (!(dbop & (1<<15)))
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btn |= BUTTON_REC;
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/* handle wheel */
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int wheel_value = dbop & (1<<13|1<<14);
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wheel_value >>= 13;
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/* Set afsel, so that we can read our buttons */
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GPIOC_AFSEL &= ~(1<<2|1<<3|1<<4|1<<5|1<<6);
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/* set dir so we can read our buttons (but reset the C pins first) */
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GPIOB_DIR &= ~(1<<4);
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GPIOC_DIR |= (1<<2|1<<3|1<<4|1<<5|1<<6);
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GPIOC_PIN(2) |= (1<<2);
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GPIOC_PIN(3) |= (1<<3);
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GPIOC_PIN(4) |= (1<<4);
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GPIOC_PIN(5) |= (1<<5);
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GPIOC_PIN(6) |= (1<<6);
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GPIOC_DIR &= ~(1<<2|1<<3|1<<4|1<<5|1<<6);
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int delay = 2; /* small delay needed to read buttons correctly */
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while(delay--);
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/* direct GPIO connections */
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if (!GPIOC_PIN(2))
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btn |= BUTTON_UP;
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if (!GPIOC_PIN(3))
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btn |= BUTTON_LEFT;
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if (!GPIOC_PIN(4))
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btn |= BUTTON_SELECT;
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if (!GPIOC_PIN(5))
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btn |= BUTTON_RIGHT;
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if (!GPIOC_PIN(6))
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btn |= BUTTON_DOWN;
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/* return to settings needed for lcd */
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GPIOC_DIR |= (1<<2|1<<3|1<<4|1<<5|1<<6);
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GPIOC_AFSEL |= (1<<2|1<<3|1<<4|1<<5|1<<6);
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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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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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/* The int_btn variable is set in the button interrupt handler */
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return btn;
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}
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