Protocol Frame Description
Player response is PLAYER_TIME* frame.
PLAYER_GETINDEXNUMBER Get numbers of files in current directory or root directory.
Command
Table
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Frame Start | Channel | Command | Data Length | Data | CheckSum | |
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7Eh | If not used, | 59h | 00h | No | Yes | |
FFh | ||||||
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Player response is PLAYER_INDEXNUMBER* frame.
PLAYER_ENTER_ROOT_DIR Select first available MP3 files in the root directory. Player response is SYSTEM_ACK or Command SYSTEM_NACK frame (no MP3 file found or low level error).
Table
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Frame Start | Channel | Command | Data Length | Data | CheckSum | |
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7Eh | If not used, | 5Ah | 00h | No | Yes | |
FFh | ||||||
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PLAYER_SET_FILTER Set file filters (no directory, only MP3 files are seen). This command has be sent before Command the SYSTEM_SELECT_MEMORY command because the filter are used during file
system FAT install.
Table
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Frame Start | Channel | Command | Data Length |
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| Byte 0: Filter |
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7Eh | If not used, | 5Bh | 01h | - 00h | No filter | Yes | |
FFh | - 01h | Filter directory (no | |||||
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| directory seen only MP3 files) |
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PLAYER_GET_FILE_LIST Get file name list in current directory or root directory.
Command
Table
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Frame Start | Channel | Command | Data Length | Data | CheckSum | |
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7Eh | If not used, | 5Ch | 00h | No | Yes | |
FFh | ||||||
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Player reponse is:
FS_NAME* frame for each file name in current directory
FS_END_OF_LIST* frame when end of list is reached. First file of the list is then selected and become current file.
Example:
AT83SND2CMP3 User Guide |