| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2007 by Dave Chapman |
| * |
| * 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 "cpu.h" |
| #include "button.h" |
| #include "adc.h" |
| |
| /* |
| |
| Results of button testing (viewing ADC values whilst pressing buttons): |
| |
| HOLD: GPIOB & 0x0200 (0=hold active, 0x0200 = hold inactive) |
| |
| ADC[1]: (approx values) |
| |
| Idle - 0x3ff |
| MENU - unknown |
| |
| REPEAT/AB - 0x03? |
| LEFT - 0x07?-0x08? |
| SELECT - 0x0c? |
| RIGHT - 0x11? |
| |
| PLAY/PAUSE - 0x17?-0x018? |
| VOL UP - 0x1e?-0x01f? |
| VOL DOWN - 0x26? |
| |
| */ |
| |
| void button_init_device(void) |
| { |
| /* Nothing to do */ |
| } |
| |
| int button_read_device(void) |
| { |
| int btn = BUTTON_NONE; |
| int adc; |
| |
| /* TODO - determine how to detect BUTTON_MENU - it doesn't appear to |
| be connected to a GPIO or to an ADC |
| */ |
| |
| adc = adc_read(ADC_BUTTONS); |
| |
| if (adc < 0x384) { |
| if (adc < 0x140) { |
| if (adc < 0x96) { |
| if (adc < 0x50) { |
| btn |= BUTTON_REPEATAB; /* 0x00..0x4f */ |
| } else { |
| btn |= BUTTON_LEFT; /* 0x50..0x95 */ |
| } |
| } else { |
| if (adc < 0xe0) { |
| btn |= BUTTON_SELECT; /* 0x96..0xdf */ |
| } else { |
| btn |= BUTTON_RIGHT; /* 0xe0..0x13f */ |
| } |
| } |
| } else { |
| if (adc < 0x208) { |
| if (adc < 0x1b0) { |
| btn |= BUTTON_PLAYPAUSE; /* 0x140..0x1af */ |
| } else { |
| btn |= BUTTON_VOLUP; /* 0x1b0..0x207 */ |
| } |
| } else { |
| btn |= BUTTON_VOLDOWN; /* 0x209..0x383 */ |
| } |
| } |
| } |
| |
| return btn; |
| } |
| |
| bool button_hold(void) |
| { |
| return (GPIOB & 0x200)?false:true; |
| } |