Atmel AT83SND2C MP3 - Manual (Page 56)

Protocol Frame Description
5-52 AT83SND2CMP3 User Guide
7525A–MP3–07/05
Table 5-72 . FS_FILESIZE Frame
Note: File size is 4 bytes (MSB is byte 0). Directory size is 0.
FS_FILEPOS* Response Player current file position (only in Player PLAY operating mode). The frame
FS_FILEPOS returns 2 parameters:
„
FCHAIN_INDEX: number of the fragment of the file, in fact the index of the table in
the cluster chain (frame parameter byte 1 ).
„ FLAST_CLUST_INDEX: index of the last cluster in file chain (frame parameter byte
2).
The File position is then given by the following formula:
FilePosition (%) = 100 * FCHAIN_INDEX / FLAST_CLUST_INDEX
Table 5-73 . FS_FILEPOSFrame
PLAYER_END_OF* Response Player has reached end of
„ list after the PLAYER_GET_FILE_LIST command.
Table 5-74 . PLAYER_END_OF_LIST Frame
SYSTEM_MOUNTED* Frame Player has finished to select and install file system FAT on selected memory.
Example:
„
Remote Controller sends the SYSTEM_SELECT_MEMORY command.
„ When file system install is finished, the Player status is updated with: FNA or MNF or
MERROR. The Player send the SYSTEM_MOUNTED frame.
Frame Start Channel
Protocol
Command Data Length Data CheckSum
7Eh
If not used,
FFh
8Bh 05h
Byte 0: Player Status Byte
Byte 1: MSB3 File size
Byte 2: MSB2 File size
Byte 3: MSB1 File size
Byte 4: MSB0 File size
Yes
Frame Start Channel
Protocol
Command Data Length Data CheckSum
7Eh
If not used,
FFh
8Ch 03h
Byte 0: Player Status Byte
Byte 1: FCHAIN_INDEX
Byte 2: FLAST_CLUST_INDEX
Yes
Frame Start Channel
Protocol
Command Data Length Data CheckSum
7Eh
If not used,
FFh
8Dh 02h
Byte 0: Player Status
Byte 1:
- 00h => reserved
- 01h => End of list reached
Yes