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C51 COMPILER V6.20c FILE 07/10/2002 15:17:48 PAGE 1
C51 COMPILER V6.20c, COMPILATION OF MODULE FILE
OBJECT MODULE PLACED IN ..\obj\file.obj
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE ..\src\file\file.c BROWSE INCDIR(..\src\system;..\..\..\lib) DEFINE(KEIL) D
-EBUG OBJECTEXTEND PRINT(.\file.lst) OBJECT(..\obj\file.obj)
stmt level source
1 /*C**************************************************************************
2 * $RCSfile: file.c,v $
3 *----------------------------------------------------------------------------
4 * Copyright (c) 2002 Atmel.
5 *----------------------------------------------------------------------------
6 * RELEASE: $Name: DEMO_FAT_1_2_5 $
7 * REVISION: $Revision: 1.4 $
8 * FILE_CVSID: $Id: file.c,v 1.4 2002/06/06 15:21:05 ffosse Exp $
9 *----------------------------------------------------------------------------
10 * PURPOSE:
11 * This file contains extention routines to the file system
12 *****************************************************************************/
13
14 /*_____ I N C L U D E S ____________________________________________________*/
15
16 #include "config.h" /* system configuration */
17 #include "..\display\disp_task.h" /* display task definition */
18 #include "..\file\file.h" /* file system definition */
19
20 /*_____ M A C R O S ________________________________________________________*/
21
22 #define F_SEEK_TIME ((Byte)4)
23
24
25 /*_____ D E F I N I T I O N ________________________________________________*/
26
27
28 /*_____ D E C L A R A T I O N ______________________________________________*/
29
30
31 /*F**************************************************************************
32 * NAME: file_seek_prev
33 *----------------------------------------------------------------------------
34 * PARAMS:
35 * ext: file type identifier
36 *
37 * return:
38 *----------------------------------------------------------------------------
39 * PURPOSE:
40 * Select previous file with specified extension
41 *----------------------------------------------------------------------------
42 * EXAMPLE:
43 *----------------------------------------------------------------------------
44 * NOTE:
45 * Depending on the time played, this function selects the previous file
46 * or restarts the file under playing.
47 *----------------------------------------------------------------------------
48 * REQUIREMENTS:
49 *****************************************************************************/
50 void file_seek_prev (Byte id)
51 {
52 1 if ((disp_get_sec() < F_SEEK_TIME) && (disp_get_min() == 0))
53 1 {
54 2 while (File_goto_prev() == OK)
C51 COMPILER V6.20c FILE 07/10/2002 15:17:48 PAGE 2
55 2 {
56 3 /* a file or a directory exists */
57 3 if ((File_type() & id) != 0) /* specified file type found */
58 3 {
59 4 return; /* exit when found */
60 4 }
61 3 }
62 2 /* beginning of dir */
63 2 if (File_goto_last() == OK) /* goto to the end of dir */
64 2 {
65 3 do
66 3 {
67 4 if ((File_type() & id) != 0) /* look for a specified file */
68 4 { /* specified file type found */
69 5 return; /* exit when found */
70 5 }
71 4 }
72 3 while (File_goto_prev() == OK);
73 3 }
74 2 }
75 1 }
76
77
78 /*F**************************************************************************
79 * NAME: file_seek_next
80 *----------------------------------------------------------------------------
81 * PARAMS:
82 * id: file type identifier
83 * loop: loop to the first file
84 *
85 * return:
86 *----------------------------------------------------------------------------
87 * PURPOSE:
88 * Select next file with specified extension
89 *----------------------------------------------------------------------------
90 * EXAMPLE:
91 *----------------------------------------------------------------------------
92 * NOTE:
93 *----------------------------------------------------------------------------
94 * REQUIREMENTS:
95 *****************************************************************************/
96 bit file_seek_next (Byte id, bit loop)
97 {
98 1
99 1 while (File_goto_next() == OK)
100 1 {
101 2 /* file or dir found */
102 2 if ((File_type() & id) != 0)
103 2 { /* specified file type found */
104 3 return TRUE; /* exit when found */
105 3 }
106 2 }
107 1 /* end of dir */
108 1 if (File_goto_first() == OK) /* goto beginning of the dir */
109 1 {
110 2 if (loop) /* loop ? */
111 2 { /* re-start at the beginning */
112 3 do
113 3 {
114 4 if ((File_type() & id) != 0) /* look for a specified file */
115 4 { /* specified file type found */
116 5 return TRUE; /* exit when found */
C51 COMPILER V6.20c FILE 07/10/2002 15:17:48 PAGE 3
117 5 }
118 4 }
119 3 while (File_goto_next() == OK);
120 3 return FALSE; /* no specified file in the dir */
121 3 }
122 2 else /* no loop */
123 2 {
124 3 return FALSE; /* Stop at the beginning */
125 3 }
126 2 }
127 1 else
128 1 return FALSE;
129 1 }
130
131
132 /*F**************************************************************************
133 * NAME: file_entry_dir
134 *----------------------------------------------------------------------------
135 * PARAMS:
136 * id: file type identifier
137 *
138 * return:
139 * OK: file type found
140 * KO: file type not found
141 *----------------------------------------------------------------------------
142 * PURPOSE:
143 * Enter a directory
144 *----------------------------------------------------------------------------
145 * EXAMPLE:
146 *----------------------------------------------------------------------------
147 * NOTE:
148 *----------------------------------------------------------------------------
149 * REQUIREMENTS:
150 *****************************************************************************/
151 bit file_entry_dir (Byte id)
152 {
153 1 if (File_type() == FILE_DIR) /* only for directory! */
154 1 { /* stopped on a directory */
155 2 if (File_goto_child(id) != OK)
156 2 {
157 3 /* no file in dir */
158 3 return File_goto_parent(id);
159 3 }
160 2 else
161 2 return OK;
162 2 }
163 1 }
164
165
166
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 117 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = ---- 3
IDATA SIZE = ---- ----
BIT SIZE = ---- 1
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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