settings.c

编译后直接运行的ＭＰ３播放器全部Ｃ语言源代码 一个包含FAT文件系统、系统引导 Boot、FLASH Driver等内容的

/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id: settings.c,v 1.189 2004/01/26 17:05:21 hardeeps Exp $
 *
 * Copyright (C) 2002 by [e-mail]
 * RTC config saving code (C) 2002 by [e-mail]
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/

#include <stdio.h>
#include "config.h"
#include "kernel.h"
#include "thread.h"
#include "settings.h"
#include "disk.h"
#include "panic.h"
#include "debug.h"
#include "button.h"
#include "usb.h"
#include "backlight.h"
#include "lcd.h"
#include "mpeg.h"
#include "mp3_playback.h"
#include "string.h"
#include "ata.h"
#include "fat.h"
#include "power.h"
#include "backlight.h"
#include "powermgmt.h"
#include "status.h"
#include "atoi.h"
#include "screens.h"
#include "ctype.h"
#include "file.h"
#include "errno.h"
#include "system.h"
#include "misc.h"
#ifdef HAVE_LCD_BITMAP
#include "icons.h"
#include "font.h"
#include "peakmeter.h"
#include "hwcompat.h"
#endif
#include "lang.h"
#include "language.h"
#include "wps-display.h"
#include "powermgmt.h"
#include "bookmark.h"
#include "sprintf.h"
#include "keyboard.h"
#include "version.h"
#ifdef HAVE_MAS3507D
void dac_line_in(bool enable);
#endif
struct user_settings global_settings;
char rockboxdir[] = ROCKBOX_DIR;       /* config/font/data file directory */
char rec_base_directory[] = REC_BASE_DIR;


#define CONFIG_BLOCK_VERSION 9
#define CONFIG_BLOCK_SIZE 512
#define RTC_BLOCK_SIZE 44

#ifdef HAVE_LCD_BITMAP
#define MAX_LINES 10
#else
#define MAX_LINES 2
#endif

/********************************************

Config block as saved on the battery-packed RTC user RAM memory block
of 44 bytes, starting at offset 0x14 of the RTC memory space.

offset  abs
0x00    0x14    "Roc"   header signature: 0x52 0x6f 0x63
0x03    0x17    <version byte: 0x0>
0x04    0x18    <volume byte>
0x05    0x19    <balance byte>
0x06    0x1a    <bass byte>
0x07    0x1b    <treble byte>
0x08    0x1c    <loudness byte>
0x09    0x1d    <bass boost byte>
0x0a    0x1e    <contrast (bit 0-5), invert bit (bit 6), show_icons (bit 7)>
0x0b    0x1f    <backlight_on_when_charging, invert_cursor, backlight_timeout>
0x0c    0x20    <poweroff timer byte>
0x0d    0x21    <resume settings byte>
0x0e    0x22    <shuffle,dirfilter,sort_case,discharge,statusbar,show_hidden,
                 scroll bar>
0x0f    0x23    <volume type, battery type, timeformat, scroll speed>
0x10    0x24    <ff/rewind min step, acceleration rate>
0x11    0x25    <AVC, channel config>
0x12    0x26    <(short) Resume playlist index, or -1 if no playlist resume>
0x14    0x28    <(short) Resume playlist first index>
0x16    0x2a    <(int) Byte offset into resume file>
0x1a    0x2e    <time until disk spindown>
0x1b    0x2f    <browse current, play selected, recursive dir insert>
0x1c    0x30    <peak meter hold timeout (bit 0-4),
                 flip_display (bit 6)
                 rec_editable (bit 7)>
0x1d    0x31    <(int) Resume shuffle seed, or -1 if no shuffle>
0x21    0x35    <repeat mode (bit 0-1), rec. channels (bit 2),
                 mic gain (bit 4-7)>
0x22    0x36    <rec. quality (bit 0-2), source (bit 3-4), frequency (bit 5-7)>
0x23    0x37    <rec. left gain (bit 0-3)>
0x24    0x38    <rec. right gain (bit 0-3)>
0x25    0x39    <disk poweroff flag (bit 0), MP3 buffer margin (bit 1-3),
                 Trickle charge flag (bit 4)>
0x26    0x40    <runtime low byte>
0x27    0x41    <runtime high byte>
0x28    0x42    <topruntime low byte>
0x29    0x43    <topruntime high byte>

0x2a    <checksum 2 bytes: xor of 0x0-0x29>

Config memory is reset to 0xff and initialized with 'factory defaults' if
a valid header & checksum is not found. Config version number is only
increased when information is _relocated_ or space is _reused_ so that old
versions can read and modify configuration changed by new versions. New
versions should check for the value of '0xff' in each config memory
location used, and reset the setting in question with a factory default if
needed. Memory locations not used by a given version should not be
modified unless the header & checksum test fails.

Because 0xff mean that the byte is unused, care must be taken so that
a used byte can't have the value 0xff. Either use only 7 bits, or make sure
that the value will never be 0xff.

Rest of config block, only saved to disk:
0xA8  (char)jump scroll mode (only for player)
0xA9  (char)jump scroll delay (only for player)
0xAA  Max number of files in playlist (1000-20000)
0xAC  Max number of files in dir (50-10000)
0xAE  fade on pause/unpause/stop setting (bit 0)
      caption backlight (bit 1)
      car adapter mode (bit 2)
      line_in (Player only)  (bit 3)
      playlist viewer icons (bit 4)
      playlist viewer indices (bit 5)
      playlist viewer track display (bit 6)
0xAF  <most-recent-bookmarks, auto-bookmark, autoload>
0xB0  peak meter clip hold timeout (bit 0-4), peak meter performance (bit 7)
0xB1  peak meter release step size, peak_meter_dbfs (bit 7)
0xB2  peak meter min either in -db or in percent
0xB3  peak meter max either in -db or in percent
0xB4  battery capacity
0xB5  scroll step in pixels
0xB6  scroll start and endpoint delay
0xB7  bidir scroll setting (bidi if 0-200% longer than screen width)
0xB8  (char[20]) WPS file
0xCC  (char[20]) Lang file
0xE0  (char[20]) Font file
0xF4  Prerecording time (bit 0-4), Recording directory option (bit 5-6)
0xF5-0xFF  <unused>

*************************************/

#include "rtc.h"
long lasttime = 0;
static unsigned char config_block[CONFIG_BLOCK_SIZE];

/*
 * Calculates the checksum for the config block and returns it
 */

static unsigned short calculate_config_checksum(unsigned char* buf)
{
    unsigned int i;
    unsigned char cksum[2];
    cksum[0] = cksum[1] = 0;
    
    for (i=0; i < RTC_BLOCK_SIZE - 2; i+=2 ) {
        cksum[0] ^= buf[i];
        cksum[1] ^= buf[i+1];
    }

    return (cksum[0] << 8) | cksum[1];
}

/*
 * initialize the config block buffer
 */
static void init_config_buffer( void )
{
    DEBUGF( "init_config_buffer()\n" );
    
    /* reset to 0xff - all unused */
    memset(config_block, 0xff, CONFIG_BLOCK_SIZE);
    /* insert header */
    config_block[0] = 'R';
    config_block[1] = 'o';
    config_block[2] = 'c';
    config_block[3] = CONFIG_BLOCK_VERSION;
}

/*
 * save the config block buffer to disk or RTC RAM
 */
static int save_config_buffer( void )
{
    unsigned short chksum;
#ifdef HAVE_RTC
    unsigned int i;
#endif

    DEBUGF( "save_config_buffer()\n" );
    
    /* update the checksum in the end of the block before saving */
    chksum = calculate_config_checksum(config_block);
    config_block[ RTC_BLOCK_SIZE - 2 ] = chksum >> 8;
    config_block[ RTC_BLOCK_SIZE - 1 ] = chksum & 0xff;

#ifdef HAVE_RTC    
    /* FIXME: okay, it _would_ be cleaner and faster to implement rtc_write so
       that it would write a number of bytes at a time since the RTC chip
       supports that, but this will have to do for now 8-) */
    for (i=0; i < RTC_BLOCK_SIZE; i++ ) {
        int r = rtc_write(0x14+i, config_block[i]);
        if (r) {
            DEBUGF( "save_config_buffer: rtc_write failed at addr 0x%02x: %d\n",
                    14+i, r );
            return r;
        }
    }

#endif

    if (fat_startsector() != 0)
        ata_delayed_write( 61, config_block);
    else
        return -1;

    return 0;
}

/*
 * load the config block buffer from disk or RTC RAM
 */
static int load_config_buffer( void )
{
    unsigned short chksum;
    bool correct = false;

#ifdef HAVE_RTC
    unsigned int i;
    unsigned char rtc_block[RTC_BLOCK_SIZE];
#endif
    
    DEBUGF( "load_config_buffer()\n" );

    if (fat_startsector() != 0) {
        ata_read_sectors( 61, 1,  config_block);

        /* calculate the checksum, check it and the header */
        chksum = calculate_config_checksum(config_block);
        
        if (config_block[0] == 'R' &&
            config_block[1] == 'o' &&
            config_block[2] == 'c' &&
            config_block[3] == CONFIG_BLOCK_VERSION &&
            (chksum >> 8) == config_block[RTC_BLOCK_SIZE - 2] &&
            (chksum & 0xff) == config_block[RTC_BLOCK_SIZE - 1])
        {
            DEBUGF( "load_config_buffer: header & checksum test ok\n" );
            correct = true;
        }
    }

#ifdef HAVE_RTC    
    /* read rtc block */
    for (i=0; i < RTC_BLOCK_SIZE; i++ )
        rtc_block[i] = rtc_read(0x14+i);

    chksum = calculate_config_checksum(rtc_block);
    
    /* if rtc block is ok, use that */
    if (rtc_block[0] == 'R' &&
        rtc_block[1] == 'o' &&
        rtc_block[2] == 'c' &&
        rtc_block[3] == CONFIG_BLOCK_VERSION &&
        (chksum >> 8) == rtc_block[RTC_BLOCK_SIZE - 2] &&
        (chksum & 0xff) == rtc_block[RTC_BLOCK_SIZE - 1])
    {
        memcpy(config_block, rtc_block, RTC_BLOCK_SIZE);
        correct = true;
    }
#endif
    
    if ( !correct ) {
        /* if checksum is not valid, clear the config buffer */
        DEBUGF( "load_config_buffer: header & checksum test failed\n" );
        init_config_buffer();
        return -1;
    }

    return 0;
}

/*
 * persist all runtime user settings to disk or RTC RAM
 */
int settings_save( void )
{
    DEBUGF( "settings_save()\n" );
    
    /* update the config block buffer with current
       settings and save the block in the RTC */
    config_block[0x4] = (unsigned char)global_settings.volume;
    config_block[0x5] = (char)global_settings.balance;
    config_block[0x6] = (unsigned char)global_settings.bass;
    config_block[0x7] = (unsigned char)global_settings.treble;
    config_block[0x8] = (unsigned char)global_settings.loudness;
    config_block[0x9] = (unsigned char)global_settings.bass_boost;
    
    config_block[0xa] = (unsigned char)
      ((global_settings.contrast & 0x3f) |
       (global_settings.invert ? 0x40 : 0) |
       (global_settings.show_icons ? 0x80 : 0) );

    config_block[0xb] = (unsigned char)
        ((global_settings.backlight_on_when_charging?0x40:0) |
         (global_settings.invert_cursor ? 0x20 : 0) |
         (global_settings.backlight_timeout & 0x1f));
    config_block[0xc] = (unsigned char)global_settings.poweroff;
    config_block[0xd] = (unsigned char)global_settings.resume;
    
    config_block[0xe] = (unsigned char)
        ((global_settings.playlist_shuffle & 1) |
         ((global_settings.dirfilter & 1) << 1) |
         ((global_settings.sort_case & 1) << 2) |
         ((global_settings.discharge & 1) << 3) |
         ((global_settings.statusbar & 1) << 4) |
         ((global_settings.dirfilter & 2) << 4) |
         ((global_settings.scrollbar & 1) << 6));
    
    config_block[0xf] = (unsigned char)
        ((global_settings.volume_type & 1) |
         ((global_settings.battery_type & 1) << 1) |
         ((global_settings.timeformat & 1)   << 2) |
         ( global_settings.scroll_speed      << 3));
    
    config_block[0x10] = (unsigned char)
        ((global_settings.ff_rewind_min_step & 15) << 4 |
         (global_settings.ff_rewind_accel & 15));

    config_block[0x11] = (unsigned char)
        ((global_settings.avc & 0x03) | 
         ((global_settings.channel_config & 0x07) << 2));

    *((short*)(&config_block[0x12])) = global_settings.resume_index;
    *((short*)(&config_block[0x14])) = global_settings.resume_first_index;
    memcpy(&config_block[0x16], &global_settings.resume_offset, 4);
    DEBUGF( "+Resume index %X offset %X\n",
            global_settings.resume_index,
            global_settings.resume_offset );

    config_block[0x1a] = (unsigned char)global_settings.disk_spindown;