b9093b2b35
The blue bars I previously had with this way are fixed by blocking DBOP output while reading buttons from GPIO. We reached the maximum fps even at unboosted now (100.0 fps at lcd_update(), DBOP can't do more). Optimisation to YUV stuff is still possible though. The e200v2 scrollwheel is very improved due to the this and the previous speedup since the chance of getting the wheel read blocked is greatly decreased with faster updates. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22578 a1c6a512-1295-4272-9138-f99709370657
341 lines
9.8 KiB
C
341 lines
9.8 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 by Thomas Martitz
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* Copyright (C) 2008 by Dominik Wenger
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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 "system.h"
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#include "button.h"
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#include "button-target.h"
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#include "backlight.h"
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#ifdef SANSA_FUZE
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#define DBOP_BIT15_BUTTON BUTTON_HOME
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#define WHEEL_REPEAT_INTERVAL (HZ/5)
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#define WHEEL_COUNTER_DIV 4
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#define ACCEL_INCREMENT 2
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#define ACCEL_SHIFT 2
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#define BUTTON_DELAY 30
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#endif
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#ifdef SANSA_E200V2
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#define DBOP_BIT15_BUTTON BUTTON_REC
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#define WHEEL_REPEAT_INTERVAL (HZ/5)
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#define WHEEL_COUNTER_DIV 2
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#define ACCEL_INCREMENT 3
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#define ACCEL_SHIFT 1
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#define BUTTON_DELAY 10
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/* read_missed is true if buttons could not
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* be read (see lcd_button_support) */
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static bool read_missed = false;
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#endif
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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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static unsigned short _dbop_din = BUTTON_NONE;
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/* in the lcd driver */
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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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GPIOA_DIR |= (1<<1);
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GPIOA_PIN(1) = (1<<1);
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}
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#if !defined(BOOTLOADER) && defined(HAVE_SCROLLWHEEL)
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static void scrollwheel(unsigned short dbop_din)
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{
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/* current wheel values, parsed from dbop and the resulting button */
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unsigned wheel_value = 0;
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unsigned btn = BUTTON_NONE;
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/* old wheel values */
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static unsigned old_wheel_value = 0;
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static unsigned old_btn = BUTTON_NONE;
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/*
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* Getting BUTTON_REPEAT works like this: Remember when the btn value was
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* posted to the button_queue last, and if it was recent enough, generate
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* BUTTON_REPEAT
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*/
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static long last_wheel_post = 0;
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/*
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* Providing wheel acceleration works as follows: We increment accel
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* by 2 if the wheel was turned, and decrement it by 1 each tick
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* (no matter if it was turned), that means: the longer and faster you turn,
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* the higher accel will be. accel>>2 will actually posted to the button_queue
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*/
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static int accel = 0;
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/* We only post every 4th action, as this matches better with the physical
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* clicks of the wheel */
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static int counter = 0;
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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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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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if(hold_button)
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{
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accel = counter = 0;
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return;
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}
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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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if (btn != old_btn)
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{
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/* direction reversals nullify acceleration and counters */
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old_btn = btn;
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accel = counter = 0;
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}
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/* wheel_delta will cause lists to jump over items,
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* we want this for fast scrolling, but we must keep it accurate
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* for slow scrolling */
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int wheel_delta = 0;
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/* generate BUTTON_REPEAT if quick enough, scroll slightly faster too*/
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if (TIME_BEFORE(current_tick, last_wheel_post + WHEEL_REPEAT_INTERVAL))
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{
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btn |= BUTTON_REPEAT;
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wheel_delta = accel>>ACCEL_SHIFT;
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}
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accel += ACCEL_INCREMENT;
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/* the wheel is more reliable if we don't send every change,
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* every WHEEL_COUNTER_DIVth is basically one "physical click"
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* which should make up 1 item in lists */
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if (++counter >= WHEEL_COUNTER_DIV && queue_empty(&button_queue))
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{
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buttonlight_on();
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backlight_on();
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queue_post(&button_queue, btn, ((wheel_delta+1)<<24));
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/* message posted - reset count and remember post */
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counter = 0;
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last_wheel_post = current_tick;
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}
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}
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if (accel > 0
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#ifdef SANSA_E200V2
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&& !read_missed /* decrement only if reading buttons was successful */
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#endif
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)
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accel--;
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old_wheel_value = wheel_value;
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}
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#endif /* !defined(BOOTLOADER) && defined(SCROLLWHEEL) */
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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 button_delay(void)
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{
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int i = BUTTON_DELAY;
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while(i--) asm volatile ("nop\n");
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}
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unsigned short button_read_dbop(void)
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{
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#ifdef SANSA_FUZE
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/* skip home and power reading if lcd_button_support was blocked,
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* since the dbop bit 15 is invalid then, and use the old value instead
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* -20 (arbitary value) indicates valid home&power button read
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* (fuze only) */
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int old_home_power = -20;
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#endif
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if(!lcd_button_support())
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{
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#if defined(SANSA_FUZE)
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old_home_power = (_dbop_din & (1<<15|1<<8));
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#elif defined(SANSA_E200V2)
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read_missed = true;
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#endif
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}
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#ifdef SANSA_E200V2
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if (!read_missed) /* read buttons only if lcd_button_support was not blocked */
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#endif
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{
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/* Set up dbop for input */
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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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button_delay();
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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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}
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#ifdef SANSA_FUZE
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/* write back old values if blocked */
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if (old_home_power != -20)
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{
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_dbop_din |= old_home_power & 1<<15;
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_dbop_din &= 0xfeff|(old_home_power & 1<<8);
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}
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#endif
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#if defined(HAVE_SCROLLWHEEL) && !defined(BOOTLOADER)
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/* read wheel on bit 13 & 14, but sent to the button queue seperately */
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scrollwheel(_dbop_din);
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#endif
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#ifdef SANSA_E200V2
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read_missed = false;
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#endif
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return _dbop_din;
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}
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/* for the debug menu */
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unsigned short button_dbop_data(void)
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{
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return _dbop_din;
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}
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static int button_gpio(void)
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{
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int btn = BUTTON_NONE;
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if(hold_button)
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return btn;
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/* disable DBOP output while changing GPIO pins that share lines with it */
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DBOP_CTRL &= ~(1<<16);
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button_delay();
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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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/* small delay needed to read buttons correctly */
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button_delay();
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/* direct GPIO connections */
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if (!GPIOC_PIN(3))
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btn |= BUTTON_LEFT;
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if (!GPIOC_PIN(2))
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btn |= BUTTON_UP;
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if (!GPIOC_PIN(6))
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btn |= BUTTON_DOWN;
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if (!GPIOC_PIN(5))
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btn |= BUTTON_RIGHT;
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if (!GPIOC_PIN(4))
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btn |= BUTTON_SELECT;
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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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DBOP_CTRL |= (1<<16); /* enable output again */
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return btn;
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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 short dbop = button_read_dbop();
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#ifdef SANSA_FUZE
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static unsigned power_counter = 0;
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#endif
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/* hold button */
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if(dbop & (1<<12))
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{
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#ifdef SANSA_FUZE
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power_counter = HZ;
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#endif
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hold_button = true;
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}
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else
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{
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hold_button = false;
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#ifdef SANSA_FUZE
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/* read power on bit 8, but not if hold button was just released, since
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* you basically always hit power due to the slider mechanism after releasing
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* (fuze only)
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* hold (wait 1 sec) */
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if (power_counter)
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power_counter--;
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#endif
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if (dbop & (1<<8)
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#ifdef SANSA_FUZE
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&& !power_counter
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#endif
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)
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btn |= BUTTON_POWER;
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/* read home on bit 15 */
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if (!(dbop & (1<<15)))
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btn |= DBOP_BIT15_BUTTON;
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btn |= button_gpio();
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}
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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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return btn;
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}
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