firmware/target/arm/as3525/sansa-c200v2/button-c200v2.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id: button-e200v2.c 19035 2008-11-07 05:31:05Z jdgordon $
   9  *
  10  * Copyright (C) 2006 by Barry Wardell
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include "system.h"
  23 #include "button-target.h"
  24 #include "button.h"
  25 #include "backlight.h"
  26 #include "powermgmt.h"
  27
  28
  29 static unsigned short _dbop_din    = 0xFFFF;
  30
  31 /* in the lcd driver */
  32 extern unsigned short int lcd_dbop_input(void);
  33
  34 static bool hold_button     = false;
  35 #ifndef BOOTLOADER
  36 static bool hold_button_old = false;
  37 #endif
  38
  39 /* for the debug menu */
  40 unsigned short button_dbop_data(void)
  41 {
  42     return _dbop_din;
  43 }
  44
  45 void button_init_device(void)
  46 {
  47     GPIOA_DIR &= ~(1<<3);
  48 }
  49
  50 bool button_hold(void)
  51 {
  52     return hold_button;
  53 }
  54
  55 /*
  56  * Get button pressed from hardware
  57  */
  58 int button_read_device(void)
  59 {
  60     int btn = BUTTON_NONE;
  61
  62     _dbop_din = lcd_dbop_input();
  63
  64     /* hold button handling */
  65     hold_button = ((_dbop_din & (1<<12)) == 0);
  66 #ifndef BOOTLOADER
  67     /* light handling */
  68     if (hold_button != hold_button_old)
  69     {
  70         hold_button_old = hold_button;
  71         backlight_hold_changed(hold_button);
  72     }
  73 #endif /* BOOTLOADER */
  74     if (hold_button) {
  75         return 0;
  76     }
  77
  78     /* direct GPIO connections */
  79     if (GPIOA_PIN(3))
  80         btn |= BUTTON_POWER;
  81
  82     /* DBOP buttons */
  83     if(!(_dbop_din & (1<<2)))
  84         btn |= BUTTON_LEFT;
  85     if(!(_dbop_din & (1<<3)))
  86         btn |= BUTTON_DOWN;
  87     if(!(_dbop_din & (1<<4)))
  88         btn |= BUTTON_SELECT;
  89     if(!(_dbop_din & (1<<5)))
  90         btn |= BUTTON_UP;
  91     if(!(_dbop_din & (1<<6)))
  92         btn |= BUTTON_RIGHT;
  93     if(!(_dbop_din & (1<<13)))
  94         btn |= BUTTON_VOL_UP;
  95     if(!(_dbop_din & (1<<14)))
  96         btn |= BUTTON_VOL_DOWN;
  97     if(!(_dbop_din & (1<<15)))
  98         btn |= BUTTON_REC;
  99
 100     return btn;
 101 }