/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2006 by Barry Wardell * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * 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 "system.h" #include "button.h" #include "backlight.h" #include "powermgmt.h" #define WHEEL_REPEAT_INTERVAL 300000 #define WHEEL_FAST_ON_INTERVAL 20000 #define WHEEL_FAST_OFF_INTERVAL 60000 #define WHEELCLICKS_PER_ROTATION 48 /* wheelclicks per full rotation */ static short _dbop_din; /* Clickwheel */ static unsigned int old_wheel_value = 0; static unsigned int wheel_repeat = BUTTON_NONE; static unsigned int wheel_click_count = 0; static unsigned int wheel_delta = 0; static int wheel_fast_mode = 0; static unsigned long last_wheel_usec = 0; static unsigned long wheel_velocity = 0; static long last_wheel_post = 0; static long next_backlight_on = 0; /* Buttons */ static bool hold_button = false; #ifndef BOOTLOADER static bool hold_button_old = false; #endif extern bool lcd_button_support(void); void button_init_device(void) { } bool button_hold(void) { return hold_button; } void clickwheel(unsigned int wheel_value) { static const unsigned char wheel_tbl[2][4] = { { 2, 0, 3, 1 }, /* Clockwise rotation */ { 1, 3, 0, 2 }, /* Counter-clockwise */ }; /* Read wheel * Bits 13 and 14 of DBOP_DIN change as follows: * Clockwise rotation 00 -> 01 -> 11 -> 10 -> 00 * Counter-clockwise 00 -> 10 -> 11 -> 01 -> 00 */ /* did the wheel value change? */ unsigned int btn = BUTTON_NONE; if (old_wheel_value == wheel_tbl[0][wheel_value]) btn = BUTTON_SCROLL_FWD; else if (old_wheel_value == wheel_tbl[1][wheel_value]) btn = BUTTON_SCROLL_BACK; if (btn != BUTTON_NONE) { int repeat = 1; /* assume repeat */ unsigned long usec = TIMER1_VALUE; /* WAG!!! and it works!!*/ unsigned v = (usec - last_wheel_usec) & 0x7fffffff; v = (v>0) ? 1000000 / v : 0; /* clicks/sec = 1000000 * +clicks/usec */ v = (v>0xffffff) ? 0xffffff : v; /* limit to 24 bit */ /* some velocity filtering to smooth things out */ wheel_velocity = (7*wheel_velocity + v) / 8; if (btn != wheel_repeat) { /* direction reversals nullify all fast mode states */ wheel_repeat = btn; repeat = wheel_fast_mode = wheel_velocity = wheel_click_count = 0; } if (wheel_fast_mode != 0) { /* fast OFF happens immediately when velocity drops below threshold */ if (TIME_AFTER(usec, last_wheel_usec + WHEEL_FAST_OFF_INTERVAL)) { /* moving out of fast mode */ wheel_fast_mode = 0; /* reset velocity */ wheel_velocity = 0; /* wheel_delta is always 1 in slow mode */ wheel_delta = 1; } } else { /* fast ON gets filtered to avoid inadvertent jumps to fast mode */ if (repeat && wheel_velocity > 1000000/WHEEL_FAST_ON_INTERVAL) { /* moving into fast mode */ wheel_fast_mode = 1 << 31; wheel_click_count = 0; wheel_velocity = 1000000/WHEEL_FAST_OFF_INTERVAL; } else if (++wheel_click_count < 2) { btn = BUTTON_NONE; } /* wheel_delta is always 1 in slow mode */ wheel_delta = 1; } if (TIME_AFTER(current_tick, next_backlight_on) || v <= 4) { /* poke backlight to turn it on or maintain it no more often than every 1/4 second*/ next_backlight_on = current_tick + HZ/4; backlight_on(); buttonlight_on(); reset_poweroff_timer(); } if (btn != BUTTON_NONE) { wheel_click_count = 0; /* generate repeats if quick enough */ if (repeat && TIME_BEFORE(usec, last_wheel_post + WHEEL_REPEAT_INTERVAL)) btn |= BUTTON_REPEAT; last_wheel_post = usec; if (queue_empty(&button_queue)) { queue_post(&button_queue, btn, wheel_fast_mode | (wheel_delta << 24) | wheel_velocity*360/WHEELCLICKS_PER_ROTATION); /* message posted - reset delta */ wheel_delta = 1; } else { /* skipped post - increment delta */ if (++wheel_delta > 0x7f) wheel_delta = 0x7f; } } last_wheel_usec = usec; } old_wheel_value = wheel_value; } static short read_dbop(void) { /*write a red pixel */ if (!lcd_button_support()) return _dbop_din; /* Set up dbop for input */ while (!(DBOP_STAT & (1<<10))); /* Wait for fifo to empty */ DBOP_CTRL |= (1<<19); DBOP_CTRL &= ~(1<<16); /* disable output */ DBOP_TIMPOL_01 = 0xe167e167; //11100001011001111110000101100111 DBOP_TIMPOL_23 = 0xe167006e; //11100001011001110000000001101110 DBOP_CTRL |= (1<<15); /* start read */ while (!(DBOP_STAT & (1<<16))); /* wait for valid data */ int delay = 50; while(delay--); /* small delay to set up read */ _dbop_din = DBOP_DIN; /* now read dbop & store info*/ DBOP_TIMPOL_01 = 0x6e167; DBOP_TIMPOL_23 = 0xa167e06f; DBOP_CTRL |= (1<<16); DBOP_CTRL &= ~(1<<19); return _dbop_din; } short button_dbop_data(void) { return _dbop_din; } /* * Get button pressed from hardware */ int button_read_device(void) { int btn = BUTTON_NONE; /* read buttons from dbop */ short dbop = read_dbop(); /* hold button */ if(dbop & (1<<12)) { hold_button = true; return btn; } else { hold_button = false; } if (dbop & (1<<8)) btn |= BUTTON_POWER; if (!(dbop & (1<<15))) btn |= BUTTON_REC; /* handle wheel */ int wheel_value = dbop & (1<<13|1<<14); wheel_value >>= 13; clickwheel(wheel_value); /* Set afsel, so that we can read our buttons */ GPIOC_AFSEL &= ~(1<<2|1<<3|1<<4|1<<5|1<<6); /* set dir so we can read our buttons (but reset the C pins first) */ GPIOB_DIR &= ~(1<<4); GPIOC_DIR |= (1<<2|1<<3|1<<4|1<<5|1<<6); GPIOC_PIN(2) |= (1<<2); GPIOC_PIN(3) |= (1<<3); GPIOC_PIN(4) |= (1<<4); GPIOC_PIN(5) |= (1<<5); GPIOC_PIN(6) |= (1<<6); GPIOC_DIR &= ~(1<<2|1<<3|1<<4|1<<5|1<<6); int delay = 50; /* small delay needed to read buttons correctly */ while(delay--); /* direct GPIO connections */ if (!GPIOC_PIN(2)) btn |= BUTTON_UP; if (!GPIOC_PIN(3)) btn |= BUTTON_LEFT; if (!GPIOC_PIN(4)) btn |= BUTTON_SELECT; if (!GPIOC_PIN(5)) btn |= BUTTON_RIGHT; if (!GPIOC_PIN(6)) btn |= BUTTON_DOWN; /* return to settings needed for lcd */ GPIOC_DIR |= (1<<2|1<<3|1<<4|1<<5|1<<6); GPIOC_AFSEL |= (1<<2|1<<3|1<<4|1<<5|1<<6); #ifndef BOOTLOADER /* light handling */ if (hold_button != hold_button_old) { hold_button_old = hold_button; backlight_hold_changed(hold_button); } #endif /* BOOTLOADER */ /* The int_btn variable is set in the button interrupt handler */ return btn; }