firmware/export/adc.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 by Linus Nielsen Feltzing
  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 #ifndef _ADC_H_
  20 #define _ADC_H_
  21
  22 #define NUM_ADC_CHANNELS 8
  23
  24 #ifdef HAVE_ONDIO_ADC
  25
  26 #define ADC_MMC_SWITCH          0 /* low values if MMC inserted */
  27 #define ADC_USB_POWER           1 /* USB, reads 0x000 when USB is inserted */
  28 #define ADC_BUTTON_OPTION       2 /* the option button, low value if pressed */
  29 #define ADC_BUTTON_ONOFF        3 /* the on/off button, high value if pressed */
  30 #define ADC_BUTTON_ROW1         4 /* Used for scanning the keys, different
  31                                      voltages for different keys */
  32 #define ADC_UNREG_POWER         7 /* Battery voltage */
  33 /* FixMe: this doesn't exist, just to make the compiler happy */
  34 #define ADC_EXT_POWER           5 /* The external power voltage, V=X*0.0148 */
  35
  36 #else
  37 /* normal JBR channel assignment */
  38 #define ADC_BATTERY             0 /* Battery voltage always reads 0x3FF due to
  39                                      silly scaling */
  40 #ifdef HAVE_FMADC
  41 #define ADC_CHARGE_REGULATOR    0 /* Uh, we read the battery voltage? */
  42 #define ADC_USB_POWER           1 /* USB, reads 0x000 when USB is inserted */
  43 #else
  44 #define ADC_CHARGE_REGULATOR    1 /* Regulator reference voltage, should read
  45                                      about 0x1c0 when charging, else 0x3FF */
  46 #define ADC_USB_POWER           2 /* USB, reads 0x3FF when USB is inserted */
  47 #endif
  48
  49 #define ADC_BUTTON_ROW1         4 /* Used for scanning the keys, different
  50                                      voltages for different keys */
  51 #define ADC_BUTTON_ROW2         5 /* Used for scanning the keys, different
  52                                      voltages for different keys */
  53 #define ADC_UNREG_POWER         6 /* Battery voltage with a better scaling */
  54 #define ADC_EXT_POWER           7 /* The external power voltage, V=X*0.0148 */
  55
  56 #endif
  57
  58 #define EXT_SCALE_FACTOR 14800
  59
  60 unsigned short adc_read(int channel);
  61 void adc_init(void);
  62
  63 #endif