📄 mp3.lst
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C51 COMPILER V7.50 MP3 11/27/2005 23:13:39 PAGE 1
C51 COMPILER V7.50, COMPILATION OF MODULE MP3
OBJECT MODULE PLACED IN MP3.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE MP3.c BROWSE DEBUG OBJECTEXTEND
line level source
1 /* MP3.C File
2 The MP3 play file
3 Created by Computer-lov. Date: 2005.3.19
4 Last edited date: 2005.5.31
5 Copyright (c) 2005 Computer-lov
6 version 1.1
7 */
8
9 #include "AT89C51SND1C.H"
10 #include "Initial.h"
11 #include "file_system.h"
12 #include "IDE.H"
13 #include "keyboard.h"
14 #include "hardware.h"
15 #include "MP3.H"
16 #include "LCD.H"
17
18 unsigned char status; //程序运行状态
19
20 extern unsigned char mp3_file_exist;
21
22 void DAC_start(unsigned char clk) //DAC开始工作
23 {
24 1 set_DAC_CLK(clk); //根据MP3文件，设置相应的DAC时钟频率
25 1 DAC_interface_en();
26 1 DAC_data_request_en();
27 1 }
28
29
30 unsigned char xdata function,vol,bas,med,tre; //保存音量等设置
31
32 code unsigned char MPEGVer[2][7]={"MPEG-2","MPEG-1"}; //版本显示信息
33 code unsigned char Fs[8]={22,44,24,48,16,32,22,44}; //采样率
34 code unsigned char DACFs[8]={33,16,30,15,46,22,33,16}; //256Fs
35 //code unsigned char DACFs[8]={22,10,20,9,30,15,0,0}; //384Fs
36
37 /////////////////////////// MP3 play /////////////////////////////////////////
38 void play(void)
39 {
40 1 unsigned long int LBA;
41 1 unsigned int i;
42 1 unsigned char sectors_count;
43 1 signed long int file_length;
44 1 unsigned char count;
45 1 unsigned char MPEG_inf; //用来保存MP3版本和采样率
46 1
47 1 /*
48 1 bit0=0 vertion 2
49 1 bit0=1 bertion 1
50 1 */
51 1 LCD_go_home();
52 1 prints(" ");
53 1 LCD_line_feed();
54 1 prints(" ");
55 1 file_length=file.length;
C51 COMPILER V7.50 MP3 11/27/2005 23:13:39 PAGE 2
56 1 LBA=file.next_cluster_number-(dbr[driver_number].root_cluster_num);
57 1 LBA=LBA*(dbr[driver_number].sectors_per_cluster)+DATA_start_sector[driver_number];
58 1
59 1 MP3_CRC_disen();
60 1
61 1 sectors_count = dbr[driver_number].sectors_per_cluster;
62 1
63 1 read_IDE_sector(LBA);
64 1 if(buffer[0]!=0xFF){pause();MP3_decoder_disen();DAC_interface_disen();get_next_file();key=0;return;}
65 1 if((buffer[1]&0x06)!=0x02){pause();MP3_decoder_disen();DAC_interface_disen();key=0;LCD_line_feed();prints(
-"MP3 层错误!! ");while(!key);get_next_file();return;}
66 1 //////////////////////// 从MP3侦头中获取采样率和压缩版本信息 //////////////
67 1 MPEG_inf=buffer[2]&0x0C; //采样率
68 1 MPEG_inf>>=1;
69 1 if((buffer[1]&0x18)==0x18)MPEG_inf=MPEG_inf | 0x01; //版本1
70 1 if((buffer[1]&0x18)==0x10)MPEG_inf=MPEG_inf & (~0x01); //版本2
71 1 ///////////////////////////////////////////////////////////////////////////
72 1
73 1 //////////////////////// 填充1K数据 ////////////////////////////////////
74 1 for(i=0;i<512;i++)MP3DAT=buffer[i];
75 1 LBA++;
76 1 sectors_count--;
77 1 if(file_length>512)file_length-=512;
78 1 else {pause();MP3_decoder_disen();DAC_interface_disen();get_next_file();key=0;return;}
79 1 if(sectors_count==0){LBA=get_next_sector();sectors_count=dbr[driver_number].sectors_per_cluster;}
80 1 read_IDE_sector(LBA);
81 1 for(i=0;i<512;i++)MP3DAT=buffer[i];
82 1 LBA++;
83 1 sectors_count--;
84 1 if(file_length>512)file_length-=512;
85 1 else {pause();MP3_decoder_disen();DAC_interface_disen();get_next_file();key=0;return;}
86 1 if(sectors_count==0){LBA=get_next_sector();sectors_count=dbr[driver_number].sectors_per_cluster;}
87 1
88 1 MP3_decoder_en(); //启动解码器
89 1 DAC_start(DACFs[MPEG_inf]); //初始化DAC接口
90 1 byte_offset=512;
91 1 key=KEY_FUN;
92 1 function=FUN_MAX;
93 1 while(1)
94 1 {
95 2 if(key) //如果有键按下
96 2 {
97 3 switch (key)
98 3 {
99 4 case KEY_FUN: //功能键按下
100 4 {
101 5 function++;
102 5 if(function>=FUN_MAX)function=FUN_SEL;
103 5 switch (function)
104 5 {
105 6 case FUN_SEL:LCD_go_home();for(count=0;count<14;count++)write_LCD_data(((unsigned char *)dir_n
-ame)[count]);LCD_line_feed();prints("当前曲号: ");printf(play_count);LED1=1;LED2=1;LED3=1;break;
106 6 case FUN_VOL:LCD_line_feed();prints("音量: ");printf(vol);prints(" ");LED1=0;LED2=1;LED3=
-0;break;
107 6 case FUN_BAS:LCD_line_feed();prints("低音: ");printf(bas);prints(" ");LED1=1;LED2=1;LED3=
-0;break;
108 6 case FUN_MED:LCD_line_feed();prints("中音: ");printf(med);prints(" ");LED1=1;LED2=0;LED3=
-1;break;
109 6 case FUN_TRE:LCD_line_feed();prints("高音: ");printf(tre);prints(" ");LED1=0;LED2=1;LED3=
-1;break;
110 6 case FUN_BOOT:LCD_line_feed();prints("重低音: ");if(MP3CON&0x40)prints("开");else prints("关")
-;prints(" ");LED1=0;LED2=0;LED3=0;break;
C51 COMPILER V7.50 MP3 11/27/2005 23:13:39 PAGE 3
111 6 }
112 5 key=0;break;
113 5 }
114 4 case KEY_UP: //上翻键按下
115 4 {
116 5 switch (function)
117 5 {
118 6 case FUN_SEL:{MP3_decoder_disen();DAC_interface_disen();get_pre_file();LCD_go_home();for(count=
-0;count<14;count++)write_LCD_data(((unsigned char *)dir_name)[count]);LCD_line_feed();prints("当前曲号: ");printf(play_c
-ount);key=0;return;}
119 6 case FUN_VOL:{if(vol<31)vol++;set_vol(vol);set_vor(vol);LCD_line_feed();prints("音量: ");printf
-(vol);prints(" ");break;}
120 6 case FUN_BAS:{if(bas<31)bas++;set_bas(bas);LCD_line_feed();prints("低音: ");printf(bas);prints(
-" ");break;}
121 6 case FUN_MED:{if(med<31)med++;set_med(med);LCD_line_feed();prints("中音: ");printf(med);prints(
-" ");break;}
122 6 case FUN_TRE:{if(tre<31)tre++;set_tre(tre);LCD_line_feed();prints("高音: ");printf(tre);prints(
-" ");break;}
123 6 case FUN_BOOT:{MP3_bass_boost();LCD_line_feed();prints("重低音: ");prints("开");prints(" "
-);break;}
124 6 }
125 5 key=0;break;
126 5 }
127 4 case KEY_DOWN: //下翻键按下
128 4 {
129 5 switch (function)
130 5 {
131 6 case FUN_SEL:{MP3_decoder_disen();DAC_interface_disen();get_next_file();LCD_go_home();for(count
-=0;count<14;count++)write_LCD_data(((unsigned char *)dir_name)[count]);LCD_line_feed();prints("当前曲号: ");printf(play_
-count);key=0;return;}
132 6 case FUN_VOL:{if(vol>0)vol--;set_vol(vol);set_vor(vol);LCD_line_feed();prints("音量: ");printf(
-vol);prints(" ");break;}
133 6 case FUN_BAS:{if(bas>0)bas--;set_bas(bas);LCD_line_feed();prints("低音: ");printf(bas);prints("
- ");break;}
134 6 case FUN_MED:{if(med>0)med--;set_med(med);LCD_line_feed();prints("中音: ");printf(med);prints("
- ");break;}
135 6 case FUN_TRE:{if(tre>0)tre--;set_tre(tre);LCD_line_feed();prints("高音: ");printf(tre);prints("
- ");break;}
136 6 case FUN_BOOT:{MP3_no_bass_boost();LCD_line_feed();prints("重低音: ");prints("关");prints("
- ");break;}
137 6 }
138 5 key=0;break;
139 5 }
140 4 case KEY_OK:
141 4 {
142 5 MP3_decoder_disen();
143 5 DAC_interface_disen();
144 5 status=STOP;
145 5 for(i=(folder_length/2);i<(7+folder_length/2);i++)dir_name[i]=0x2020;
146 5 LCD_line_feed();
147 5 prints("停止 ");
148 5 key=0;
149 5 return;
150 5 }
151 4 }
152 3 }
153 2 while(MPFREQ)
154 2 {
155 3 if((((unsigned char *)&byte_offset)[0])&0xFE)
156 3 {
157 4 read_IDE_sector(LBA);
158 4 LBA++;
C51 COMPILER V7.50 MP3 11/27/2005 23:13:39 PAGE 4
159 4 byte_offset=0;
160 4 sectors_count--;
161 4 file_length-=512;
162 4 while(MPFREQ)
163 4 {
164 5 MP3DAT=buffer[byte_offset];
165 5 byte_offset++;
166 5 if((((unsigned char *)&byte_offset)[0])&0xFE)break;
167 5 }
168 4 if(file_length<=0) {pause();MP3_decoder_disen();DAC_interface_disen();get_next_file();key=0;return;
-}
169 4 if(sectors_count==0){LBA=get_next_sector();sectors_count=(dbr[driver_number].sectors_per_cluster);}
170 4 }
171 3 if(MPFREQ)
172 3 {
173 4 MP3DAT=buffer[byte_offset];
174 4 byte_offset++;
175 4 }
176 3 }
177 2 }
178 1 }
179 ///////////////////////////////////////////////////////////////////////////////////////////
180
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 1840 ----
CONSTANT SIZE = 137 ----
XDATA SIZE = 5 ----
PDATA SIZE = ---- ----
DATA SIZE = 1 13
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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