firmware/target/arm/tcc77x/logikdax/button-logikdax.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 /*
  26
  27 Results of button testing:
  28
  29 HOLD:  GPIOA & 0x0002 (0=pressed, 0x0002 = released)
  30 POWER: GPIOA & 0x8000 (0=pressed, 0x8000 = released)
  31
  32 ADC[0]: (approx values)
  33
  34 RIGHT - 0x37
  35 LEFT  - 0x7f
  36 JOYSTICK PRESS - 0xc7
  37 UP             - 0x11e
  38 DOWN           - 0x184
  39 MODE           - 0x1f0/0x1ff
  40 PRESET         - 0x268/0x269
  41 REC            - 0x2dd
  42
  43 Values of ADC[0] tested in OF disassembly: 0x50, 0x96, 0xdc, 0x208, 0x384
  44
  45 */
  46
  47 void button_init_device(void)
  48 {
  49     /* Nothing to do */
  50 }
  51
  52 int button_read_device(void)
  53 {
  54     int btn = BUTTON_NONE;
  55     int adc;
  56
  57     adc = adc_read(ADC_BUTTONS);
  58
  59     if (adc < 0x384) {
  60         if (adc < 0x140) {
  61             if (adc < 0x96) {
  62                 if (adc < 0x50) {
  63                     btn |= BUTTON_RIGHT;      /* 0x00..0x4f */
  64                 } else {
  65                     btn |= BUTTON_LEFT;       /* 0x50..0x95 */
  66                 }
  67             } else {
  68                 if (adc < 0xe0) {
  69                     btn |= BUTTON_SELECT;     /* 0x96..0xdf */
  70                 } else {
  71                     btn |= BUTTON_UP;         /* 0xe0..0x13f */
  72                 }
  73             }
  74         } else {
  75             if (adc < 0x208) {
  76                 if (adc < 0x1b0) {
  77                     btn |= BUTTON_DOWN;       /* 0x140..0x1af */
  78                 } else {
  79                     btn |= BUTTON_MODE;       /* 0x1b0..0x207 */
  80                 }
  81             } else {
  82                 if (adc < 0x290) {
  83                     btn |= BUTTON_PRESET;     /* 0x208..0x28f */
  84                 } else {
  85                     btn |= BUTTON_REC;        /* 0x290..0x383 */
  86                 }
  87             }
  88         }
  89     }
  90
  91     if (!(GPIOA & 0x2))
  92         btn |= BUTTON_HOLD;
  93
  94     if (!(GPIOA & 0x8000))
  95         btn |= BUTTON_POWERPLAY;
  96
  97     return btn;
  98 }