| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2006 by Jens Arnold |
| * |
| * 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 "backlight.h" |
| #include "adc.h" |
| |
| /* |
| Recorder FM/V2 hardware button hookup |
| ===================================== |
| |
| F1, F2, F3, UP: connected to AN4 through a resistor network |
| DOWN, PLAY, LEFT, RIGHT: likewise connected to AN5 |
| |
| The voltage on AN4/ AN5 depends on which keys (or key combo) is pressed |
| FM/V2 has PLAY and RIGHT switched compared to plain recorder |
| |
| ON: AN3, low active |
| OFF: AN2, high active |
| */ |
| |
| void button_init_device(void) |
| { |
| /* Set PB4 and PB8 as input pins */ |
| PBCR1 &= 0xfffc; /* PB8MD = 00 */ |
| PBCR2 &= 0xfcff; /* PB4MD = 00 */ |
| PBIOR &= ~0x0110; /* Inputs */ |
| } |
| |
| int button_read_device(void) |
| { |
| int btn = BUTTON_NONE; |
| int data; |
| |
| /* check F1..F3 and UP */ |
| data = adc_read(ADC_BUTTON_ROW1); |
| if (data >= 150) |
| { |
| if (data >= 545) |
| if (data >= 700) |
| btn = BUTTON_F3; |
| else |
| btn = BUTTON_UP; |
| else |
| if (data >= 385) |
| btn = BUTTON_F2; |
| else |
| btn = BUTTON_F1; |
| } |
| |
| /* Some units have mushy keypads, so pressing UP also activates |
| the Left/Right buttons. Let's combat that by skipping the AN5 |
| checks when UP is pressed. */ |
| if(!(btn & BUTTON_UP)) |
| { |
| /* check DOWN, PLAY, LEFT, RIGHT */ |
| data = adc_read(ADC_BUTTON_ROW2); |
| if (data >= 150) |
| { |
| if (data >= 545) |
| if (data >= 700) |
| btn |= BUTTON_DOWN; |
| else |
| btn |= BUTTON_RIGHT; |
| else |
| if (data >= 385) |
| btn |= BUTTON_LEFT; |
| else |
| btn |= BUTTON_PLAY; |
| } |
| } |
| |
| if ( adc_read(ADC_BUTTON_ON) < 512 ) |
| btn |= BUTTON_ON; |
| if ( adc_read(ADC_BUTTON_OFF) > 512 ) |
| btn |= BUTTON_OFF; |
| |
| return btn; |
| } |