firmware/target/arm/tcc77x/c100/button-c100.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2007 by Dave Chapman
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19
  20 #include "config.h"
  21 #include "cpu.h"
  22 #include "button.h"
  23 #include "adc.h"
  24
  25 void button_init_device(void)
  26 {
  27     GPIOA_DIR |= 0xC;
  28 }
  29
  30 int button_read_device(void)
  31 {
  32     int btn = BUTTON_NONE;
  33
  34         if (!button_hold()){
  35         GPIOA |= 0x4;
  36         GPIOA &= ~0x8;
  37
  38         int i=20; while (i--);
  39
  40         if (GPIOA & 0x10) btn |= BUTTON_PLAYPAUSE; /* up */
  41         if (GPIOA & 0x20) btn |= BUTTON_RIGHT;
  42         if (GPIOA & 0x40) btn |= BUTTON_LEFT;
  43
  44         GPIOA |= 0x8;
  45         GPIOA &= ~0x4;
  46
  47         i=20; while (i--);
  48
  49         if (GPIOA & 0x10) btn |= BUTTON_VOLUP;
  50         if (GPIOA & 0x20) btn |= BUTTON_VOLDOWN;
  51         if (GPIOA & 0x40) btn |= BUTTON_REPEATAB; /* down */
  52
  53         if (GPIOA & 0x80) btn |= BUTTON_SELECT;
  54         if (GPIOA & 0x100) btn |= BUTTON_MENU;
  55         }
  56         return btn;
  57 }
  58
  59 bool button_hold(void)
  60 {
  61     return (GPIOA & 0x2);
  62 }