Thomas Hamilton
SD Card Interface class. Log raw data bytes to memory addresses of your choice, or format the card and use the FAT file system to write files.
FATFileSystem/Interface/FATFileHandle.cpp@4:9a5878d316d5, 2010-08-27 (annotated)
- Committer:
- Blaze513
- Date:
- Fri Aug 27 00:59:28 2010 +0000
- Revision:
- 4:9a5878d316d5
- Parent:
- 3:210eb67b260c
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| Blaze513 | 4:9a5878d316d5 | 1 | /* mbed Microcontroller Library - FATFileHandle |
| Blaze513 | 4:9a5878d316d5 | 2 | Copyright (c) 2008, sford */ |
| Blaze513 | 4:9a5878d316d5 | 3 | |
| Blaze513 | 4:9a5878d316d5 | 4 | //Modified by Thomas Hamilton, Copyright 2010 |
| Blaze513 | 4:9a5878d316d5 | 5 | |
| Blaze513 | 4:9a5878d316d5 | 6 | #include "FATFileHandle.h" |
| Blaze513 | 4:9a5878d316d5 | 7 | |
| Blaze513 | 4:9a5878d316d5 | 8 | FATFileHandle::FATFileHandle(FAT_FIL InputFilStr) |
| Blaze513 | 4:9a5878d316d5 | 9 | { |
| Blaze513 | 4:9a5878d316d5 | 10 | FileObject = InputFilStr; |
| Blaze513 | 4:9a5878d316d5 | 11 | } |
| Blaze513 | 4:9a5878d316d5 | 12 | |
| Blaze513 | 4:9a5878d316d5 | 13 | ssize_t FATFileHandle::write(const void* buffer, size_t length) |
| Blaze513 | 4:9a5878d316d5 | 14 | { |
| Blaze513 | 4:9a5878d316d5 | 15 | UINT ByteWritten; |
| Blaze513 | 4:9a5878d316d5 | 16 | if (f_write(&FileObject, buffer, (UINT)length, &ByteWritten)) |
| Blaze513 | 4:9a5878d316d5 | 17 | { |
| Blaze513 | 4:9a5878d316d5 | 18 | return -1; |
| Blaze513 | 4:9a5878d316d5 | 19 | } |
| Blaze513 | 4:9a5878d316d5 | 20 | else |
| Blaze513 | 4:9a5878d316d5 | 21 | { |
| Blaze513 | 4:9a5878d316d5 | 22 | return (ssize_t)ByteWritten; |
| Blaze513 | 4:9a5878d316d5 | 23 | } |
| Blaze513 | 4:9a5878d316d5 | 24 | } |
| Blaze513 | 4:9a5878d316d5 | 25 | |
| Blaze513 | 4:9a5878d316d5 | 26 | int FATFileHandle::close() |
| Blaze513 | 4:9a5878d316d5 | 27 | { |
| Blaze513 | 4:9a5878d316d5 | 28 | if (f_close(&FileObject)) |
| Blaze513 | 4:9a5878d316d5 | 29 | { |
| Blaze513 | 4:9a5878d316d5 | 30 | return -1; |
| Blaze513 | 4:9a5878d316d5 | 31 | } |
| Blaze513 | 4:9a5878d316d5 | 32 | else |
| Blaze513 | 4:9a5878d316d5 | 33 | { |
| Blaze513 | 4:9a5878d316d5 | 34 | delete this; |
| Blaze513 | 4:9a5878d316d5 | 35 | return 0; |
| Blaze513 | 4:9a5878d316d5 | 36 | } |
| Blaze513 | 4:9a5878d316d5 | 37 | } |
| Blaze513 | 4:9a5878d316d5 | 38 | |
| Blaze513 | 4:9a5878d316d5 | 39 | ssize_t FATFileHandle::read(void* buffer, size_t length) |
| Blaze513 | 4:9a5878d316d5 | 40 | { |
| Blaze513 | 4:9a5878d316d5 | 41 | UINT ByteRead; |
| Blaze513 | 4:9a5878d316d5 | 42 | if (f_read(&FileObject, buffer, (UINT)length, &ByteRead)) |
| Blaze513 | 4:9a5878d316d5 | 43 | { |
| Blaze513 | 4:9a5878d316d5 | 44 | return -1; |
| Blaze513 | 4:9a5878d316d5 | 45 | } |
| Blaze513 | 4:9a5878d316d5 | 46 | else |
| Blaze513 | 4:9a5878d316d5 | 47 | { |
| Blaze513 | 4:9a5878d316d5 | 48 | return (ssize_t)ByteRead; |
| Blaze513 | 4:9a5878d316d5 | 49 | } |
| Blaze513 | 4:9a5878d316d5 | 50 | } |
| Blaze513 | 4:9a5878d316d5 | 51 | |
| Blaze513 | 4:9a5878d316d5 | 52 | int FATFileHandle::isatty() |
| Blaze513 | 4:9a5878d316d5 | 53 | { |
| Blaze513 | 4:9a5878d316d5 | 54 | return 0; |
| Blaze513 | 4:9a5878d316d5 | 55 | } |
| Blaze513 | 4:9a5878d316d5 | 56 | |
| Blaze513 | 4:9a5878d316d5 | 57 | off_t FATFileHandle::lseek(off_t offset, int whence) |
| Blaze513 | 4:9a5878d316d5 | 58 | { |
| Blaze513 | 4:9a5878d316d5 | 59 | switch (whence) |
| Blaze513 | 4:9a5878d316d5 | 60 | { |
| Blaze513 | 4:9a5878d316d5 | 61 | case SEEK_CUR: offset += FileObject.fptr; break; |
| Blaze513 | 4:9a5878d316d5 | 62 | case SEEK_END: offset += FileObject.fsize; break; |
| Blaze513 | 4:9a5878d316d5 | 63 | } |
| Blaze513 | 4:9a5878d316d5 | 64 | if (f_lseek(&FileObject, (DWORD)offset)) |
| Blaze513 | 4:9a5878d316d5 | 65 | { |
| Blaze513 | 4:9a5878d316d5 | 66 | return -1; |
| Blaze513 | 4:9a5878d316d5 | 67 | } |
| Blaze513 | 4:9a5878d316d5 | 68 | else |
| Blaze513 | 4:9a5878d316d5 | 69 | { |
| Blaze513 | 4:9a5878d316d5 | 70 | return (off_t)FileObject.fptr; |
| Blaze513 | 4:9a5878d316d5 | 71 | } |
| Blaze513 | 4:9a5878d316d5 | 72 | } |
| Blaze513 | 4:9a5878d316d5 | 73 | |
| Blaze513 | 4:9a5878d316d5 | 74 | int FATFileHandle::fsync() |
| Blaze513 | 4:9a5878d316d5 | 75 | { |
| Blaze513 | 4:9a5878d316d5 | 76 | if (f_sync(&FileObject)) |
| Blaze513 | 4:9a5878d316d5 | 77 | { |
| Blaze513 | 4:9a5878d316d5 | 78 | return -1; |
| Blaze513 | 4:9a5878d316d5 | 79 | } |
| Blaze513 | 4:9a5878d316d5 | 80 | else |
| Blaze513 | 4:9a5878d316d5 | 81 | { |
| Blaze513 | 4:9a5878d316d5 | 82 | return 0; |
| Blaze513 | 4:9a5878d316d5 | 83 | } |
| Blaze513 | 4:9a5878d316d5 | 84 | } |
| Blaze513 | 4:9a5878d316d5 | 85 | |
| Blaze513 | 4:9a5878d316d5 | 86 | off_t FATFileHandle::flen() |
| Blaze513 | 4:9a5878d316d5 | 87 | { |
| Blaze513 | 4:9a5878d316d5 | 88 | return (off_t)FileObject.fsize; |
| Blaze513 | 1:94c648931f84 | 89 | } |