firmware/target/arm/olympus/mrobe-500/button-mr500.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2007 by Karl Kurbjun
  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 "system.h"
  23 #include "button.h"
  24 #include "kernel.h"
  25 #include "backlight.h"
  26 #include "adc.h"
  27 #include "system.h"
  28 #include "backlight-target.h"
  29 #include "uart-target.h"
  30
  31 #define BUTTON_TIMEOUT 50
  32
  33 #define BUTTON_START_BYTE 0xF0
  34 #define BUTTON_START_BYTE2 0xF4 /* not sure why, but sometimes you get F0 or F4, */
  35                                 /* but always the same one for the session? */
  36
  37 void button_init_device(void)
  38 {
  39     /* GIO is the power button, set as input */
  40     IO_GIO_DIR0 |= 0x01;
  41 }
  42
  43 inline bool button_hold(void)
  44 {
  45     return false;
  46 }
  47
  48 int button_read_device(void)
  49 {
  50     char data[5], c;
  51     int i = 0;
  52     int btn = BUTTON_NONE;
  53
  54     if ((IO_GIO_BITSET0&0x01) == 0)
  55         btn |= BUTTON_POWER;
  56
  57     uart1_heartbeat();
  58     while (uartAvailable())
  59     {
  60         if (uart1_getch(&c))
  61         {
  62             if (i && (data[0] == BUTTON_START_BYTE || data[0] == BUTTON_START_BYTE2))
  63             {
  64                 data[i++] = c;
  65             }
  66             else if (c == BUTTON_START_BYTE ||
  67                      c == BUTTON_START_BYTE2)
  68             {
  69                 data[0] = c;
  70                 i = 1;
  71             }
  72
  73             if (i == 5)
  74             {
  75                 if (data[1]& (1<<7))
  76                     btn |= BUTTON_RC_HEART;
  77                 if (data[1]& (1<<6))
  78                     btn |= BUTTON_RC_MODE;
  79                 if (data[1]& (1<<5))
  80                     btn |= BUTTON_RC_VOL_DOWN;
  81                 if (data[1]& (1<<4))
  82                     btn |= BUTTON_RC_VOL_UP;
  83                 if (data[1]& (1<<3))
  84                     btn |= BUTTON_RC_REW;
  85                 if (data[1]& (1<<2))
  86                     btn |= BUTTON_RC_FF;
  87                 if (data[1]& (1<<1))
  88                     btn |= BUTTON_RC_DOWN;
  89                 if (data[1]& (1<<0))
  90                     btn |= BUTTON_RC_PLAY;
  91                 break;
  92             }
  93         }
  94     }
  95     return btn;
  96 }