Protocol Frame Description
Table
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Frame Start | Channel | Command | Data Length | Data | CheckSum | |
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| Byte 0: Player Status Byte |
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| Byte 1: MSB3 File size |
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7Eh | If not used, | 8Bh | 05h | Byte 2: MSB2 File size | Yes | |
FFh | Byte 3: MSB1 File size | |||||
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| Byte 4: MSB0 File size |
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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
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| Protocol |
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Frame Start | Channel | Command | Data Length | Data | CheckSum | |
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| If not used, |
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| Byte 0: Player Status Byte |
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7Eh | 8Ch | 03h | Byte 1: FCHAIN_INDEX | Yes | ||
FFh | ||||||
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| Byte 2: FLAST_CLUST_INDEX |
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PLAYER_END_OF* Response Player has reached end of
list after the PLAYER_GET_FILE_LIST command.
Table
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| Protocol |
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Frame Start | Channel | Command | Data Length |
| Data | CheckSum | |
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| Byte 0: Player Status |
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7Eh | If not used, | 8Dh | 02h | Byte 1: | Yes | ||
FFh | - 00h | => reserved | |||||
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| - 01h | => End of list reached |
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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.
AT83SND2CMP3 User Guide |