voice_drv.lst

基于AT89C51SND1的MP3的程序设计(包括播放mp3和录音功能)

C51 COMPILER V7.06   VOICE_DRV                                                             05/05/2005 12:12:03 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE VOICE_DRV
OBJECT MODULE PLACED IN voice_drv.obj
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE modules\voice\voice_drv.c OPTIMIZE(7,SPEED) BROWSE INCDIR(.\modules\system;
                    -.\;.\;.\lib_refd) DEFINE(KEIL) DEBUG OBJECTEXTEND PRINT(.\voice_drv.lst) OBJECT(voice_drv.obj)

stmt level    source

   1          /*C**************************************************************************
   2          * NAME:         voice_drv.c
   3          *----------------------------------------------------------------------------
   4          * Copyright (c) 2003 Atmel.
   5          *----------------------------------------------------------------------------
   6          * RELEASE:      snd1c-refd-nf-4_0_3      
   7          * REVISION:     1.9     
   8          *----------------------------------------------------------------------------
   9          * PURPOSE:
  10          * This file contains the voice driver routines Timer 1 is used as conversion 
  11          * time base, its frequency is defined in config.h
  12          *
  13          * NOTES:
  14          * Global Variables:
  15          *   - voice_buffer:    array of bytes in xdata space
  16          *   - gl_pointer:   byte in data space
  17          *****************************************************************************/
  18          
  19          /*_____ I N C L U D E S ____________________________________________________*/
  20          
  21          #include "config.h"                 /* system configuration */
  22          #include "board.h"                  /* board definition */
  23          #include "dac\dac_drv.h"            /* dac driver definition */
  24          #include "lib_mcu\clock\clock.h"    /* clock definition */
  25          #include "voice_drv.h"              /* voice driver definition */
  26          
  27          
  28          /*_____ M A C R O S ________________________________________________________*/
  29          
  30          
  31          /*_____ D E F I N I T I O N ________________________________________________*/
  32          
  33          extern  xdata   Byte    voice_buffer[];
  34          extern  data    Byte    gl_pointer;
  35          
  36          Byte    voc_volume;                     /* volume value */
  37          
  38          
  39          /*_____ D E C L A R A T I O N ______________________________________________*/
  40          
  41          static  void    voc_audio_init (void);
  42          
  43          
  44          /*F**************************************************************************
  45          * NAME: voc_rec_init
  46          *----------------------------------------------------------------------------
  47          * PARAMS:
  48          *
  49          * return:
  50          *----------------------------------------------------------------------------
  51          * PURPOSE: 
  52          *   Initialize the timer and ADC
  53          *----------------------------------------------------------------------------
  54          * EXAMPLE:
C51 COMPILER V7.06   VOICE_DRV                                                             05/05/2005 12:12:03 PAGE 2   

  55          *----------------------------------------------------------------------------
  56          * NOTE: 
  57          *   T1_PRIO defined in config.h
  58          *----------------------------------------------------------------------------
  59          * REQUIREMENTS: 
  60          *****************************************************************************/
  61          void voc_rec_init (void)
  62          {
  63   1        gl_pointer = 0x00;
  64   1        Adc_set_clock(AD_CLOCK);
  65   1        Adc_enable();
  66   1        Adc_select_channel(VOICE_CHANNEL);          /* select voice channel */
  67   1        T1_init(T1_NOT_GATED, T1_TIMER, T1_MODE_2); /* 8-bit auto-reload */
  68   1        TH1 = T1_BASE;                              /* load timer */ 
  69   1        t1_set_prio(T1_PRIO);                       /* set-up priority */
  70   1        T1_enable_int();                            /* enable interrupt */
  71   1        T1_start();
  72   1      }
  73          
  74          
  75          /*F**************************************************************************
  76          * NAME: voc_play_init
  77          *----------------------------------------------------------------------------
  78          * PARAMS:
  79          *
  80          * return:
  81          *----------------------------------------------------------------------------
  82          * PURPOSE: 
  83          *   Audio interface initialization
  84          *----------------------------------------------------------------------------
  85          * EXAMPLE:
  86          *----------------------------------------------------------------------------
  87          * NOTE: 
  88          *----------------------------------------------------------------------------
  89          * REQUIREMENTS: 
  90          *****************************************************************************/
  91          void voc_play_init (void)
  92          {
  93   1        gl_pointer = 0x00;
  94   1        voc_audio_init();                       /* init audio interface */
  95   1        clock_voice_init();                     /* program the voice clocks */
  96   1      }
  97          
  98          
  99          /*L**************************************************************************
 100          * NAME: voc_audio_init
 101          *----------------------------------------------------------------------------
 102          * PARAMS:
 103          *
 104          * return:
 105          *----------------------------------------------------------------------------
 106          * PURPOSE: 
 107          *   Audio interface initialization in voice mode
 108          *----------------------------------------------------------------------------
 109          * EXAMPLE:
 110          *----------------------------------------------------------------------------
 111          * NOTE: 
 112          *   DAC_NB_BIT and AUD_PRIO defined in config.h
 113          *----------------------------------------------------------------------------
 114          * REQUIREMENTS: 
 115          *****************************************************************************/
 116          void voc_audio_init (void)
C51 COMPILER V7.06   VOICE_DRV                                                             05/05/2005 12:12:03 PAGE 3   

 117          {
 118   1        Aud_set_pcm_32(DAC_NB_BIT);
 119   1        Aud_set_voice(MSK_DUP0);
 120   1        aud_set_prio(AUD_PRIO);
 121   1        Aud_enable();
 122   1        Dac_unmute();
 123   1      }
 124          
 125          
 126          /*F**************************************************************************
 127          * NAME: voc_play_start
 128          *----------------------------------------------------------------------------
 129          * PARAMS:
 130          *
 131          * return:
 132          *----------------------------------------------------------------------------
 133          * PURPOSE: 
 134          *   Fill audio buffer and start sample request
 135          *----------------------------------------------------------------------------
 136          * EXAMPLE:
 137          *----------------------------------------------------------------------------
 138          * NOTE: 
 139          *   0x80 offset is added for unsigned to signed samples conversion 
 140          *----------------------------------------------------------------------------
 141          * REQUIREMENTS: 
 142          *****************************************************************************/
 143          void voc_play_start (void)
 144          {
 145   1      Byte i;
 146   1      
 147   1        for (i = 8; i != 0; i--)