/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2008 by Thomas Martitz * Copyright (C) 2008 by Dominik Wenger * * 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. * ****************************************************************************/ #include "config.h" #include "system.h" #include "button.h" #include "button-target.h" #include "backlight.h" #include "dbop-as3525.h" #ifdef SANSA_FUZE #define DBOP_BIT15_BUTTON BUTTON_HOME #define WHEEL_REPEAT_INTERVAL (HZ/5) #define WHEEL_COUNTER_DIV 4 #define ACCEL_INCREMENT 2 #define ACCEL_SHIFT 2 #endif #ifdef SANSA_E200V2 #define DBOP_BIT15_BUTTON BUTTON_REC #define WHEEL_REPEAT_INTERVAL (HZ/5) #define WHEEL_COUNTER_DIV 2 #define ACCEL_INCREMENT 3 #define ACCEL_SHIFT 1 #endif /* Buttons */ static bool hold_button = false; #ifndef BOOTLOADER static bool hold_button_old = false; #endif void button_init_device(void) { GPIOA_DIR |= (1<<1); GPIOA_PIN(1) = (1<<1); } #if !defined(BOOTLOADER) && defined(HAVE_SCROLLWHEEL) static void scrollwheel(unsigned int wheel_value) { /* current wheel values, parsed from dbop and the resulting button */ unsigned btn = BUTTON_NONE; /* old wheel values */ static unsigned old_wheel_value = 0; static unsigned old_btn = BUTTON_NONE; /* * Getting BUTTON_REPEAT works like this: Remember when the btn value was * posted to the button_queue last, and if it was recent enough, generate * BUTTON_REPEAT */ static long last_wheel_post = 0; /* * Providing wheel acceleration works as follows: We increment accel * by 2 if the wheel was turned, and decrement it by 1 each tick * (no matter if it was turned), that means: the longer and faster you turn, * the higher accel will be. accel>>2 will actually posted to the button_queue */ static int accel = 0; /* We only post every 4th action, as this matches better with the physical * clicks of the wheel */ static int counter = 0; /* Read wheel * Bits 13 and 14 of DBOP_DIN change as follows (Gray Code): * Clockwise rotation 00 -> 01 -> 11 -> 10 -> 00 * Counter-clockwise 00 -> 10 -> 11 -> 01 -> 00 * * For easy look-up, actual wheel values act as indicies also, * which is why the table seems to be not ordered correctly */ static const unsigned char wheel_tbl[2][4] = { { 2, 0, 3, 1 }, /* Clockwise rotation */ { 1, 3, 0, 2 }, /* Counter-clockwise */ }; if(hold_button) { accel = counter = 0; return; } 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; else if (old_wheel_value != wheel_value && accel > ACCEL_INCREMENT) { /* if no button is read and wheel_value changed, assume old_btn */ btn = old_btn; } /* else btn = BUTTON_NONE */ if (btn != BUTTON_NONE) { if (btn != old_btn) { /* direction reversals nullify acceleration and counters */ old_btn = btn; accel = counter = 0; } /* wheel_delta will cause lists to jump over items, * we want this for fast scrolling, but we must keep it accurate * for slow scrolling */ int wheel_delta = 0; /* generate BUTTON_REPEAT if quick enough, scroll slightly faster too*/ if (TIME_BEFORE(current_tick, last_wheel_post + WHEEL_REPEAT_INTERVAL)) { btn |= BUTTON_REPEAT; wheel_delta = accel>>ACCEL_SHIFT; } accel += ACCEL_INCREMENT; /* the wheel is more reliable if we don't send every change, * every WHEEL_COUNTER_DIVth is basically one "physical click" * which should make up 1 item in lists */ if (++counter >= WHEEL_COUNTER_DIV && queue_empty(&button_queue)) { buttonlight_on(); backlight_on(); queue_post(&button_queue, btn, ((wheel_delta+1)<<24)); /* message posted - reset count and remember post */ counter = 0; last_wheel_post = current_tick; } } if (accel > 0) accel--; old_wheel_value = wheel_value; } #endif /* !defined(BOOTLOADER) && defined(SCROLLWHEEL) */ bool button_hold(void) { return hold_button; } unsigned short button_read_dbop(void) { unsigned dbop_din = dbop_read_input(); #if defined(HAVE_SCROLLWHEEL) && !defined(BOOTLOADER) /* scroll wheel handling */ scrollwheel((dbop_din >> 13) & (1<<1|1<<0)); #endif return dbop_din; } /* * Get button pressed from hardware */ int button_read_device(void) { #ifdef SANSA_FUZE static unsigned power_counter = 0; #endif unsigned short dbop_din; int btn = BUTTON_NONE; dbop_din = button_read_dbop(); /* hold button handling */ hold_button = ((dbop_din & (1<<12)) != 0); #ifndef BOOTLOADER /* light handling */ if (hold_button != hold_button_old) { hold_button_old = hold_button; backlight_hold_changed(hold_button); } #endif /* BOOTLOADER */ if (hold_button) { #ifdef SANSA_FUZE power_counter = HZ; #endif return 0; } /* push button handling */ if ((dbop_din & (1 << 2)) == 0) btn |= BUTTON_UP; if ((dbop_din & (1 << 3)) == 0) btn |= BUTTON_LEFT; if ((dbop_din & (1 << 4)) == 0) btn |= BUTTON_SELECT; if ((dbop_din & (1 << 5)) == 0) btn |= BUTTON_RIGHT; if ((dbop_din & (1 << 6)) == 0) btn |= BUTTON_DOWN; if ((dbop_din & (1 << 8)) != 0) btn |= BUTTON_POWER; if ((dbop_din & (1 << 15)) == 0) btn |= DBOP_BIT15_BUTTON; #ifdef SANSA_FUZE /* read power on bit 8, but not if hold button was just released, since * you basically always hit power due to the slider mechanism after releasing * (fuze only) */ if (power_counter > 0) { power_counter--; btn &= ~BUTTON_POWER; } #endif return btn; }