Atmel AT83SND2C MP3 - Manual (Page 55)

Protocol Frame Description
AT83SND2CMP3 User Guide 5-51
7525A–MP3–07/05
Table 5-68 . FS_FREAD_BLOCK_DATA Frame
FS_FREAD_BLOCK_DATA_EN
D* Response
Player Response of FS_READ_BLOCK command when last block is reached (end of
file). After this Player reponse, there is no need to send the FS_FCLOSE command.
Player returns in operating mode IDLE.
Table 5-69 . FS_FREAD_BLOCK_DATA_END Frame
PLAYER_INDEX_NUMBER*
Response
Player Response of PLAYER_GETINDEXNUMBER command. This frame returns the
number of file in current directory.
Table 5-70 . PLAYER_INDEX_NUMBER Frame
FS_MEMFREESPACE*
Response
Player Response of FS_GETMEMFREESPACE command. Data parameter are:
„
number of free cluster (32 bits, byte 1:4, MSB is byte 0 in data parameters).
„ cluster size in sector (8 bits, byte 5 in data parameters).
Note: Sector size is 512 Bytes.
Memory free space available is :
MemoryFreeSpace(Byte) = NumberFreeCluster * ClusterSize * 512 Bytes.
Table 5-71 . FS_MEMFREESPACE Frame
FS_FILESIZE* Response Current file size is in Bytes. Player Response of FS_GETFILESIZE command.
Frame Start Channel
Protocol
Command Data Length Data CheckSum Data Block
7Eh
If not used,
FFh
84h 01h DataBlockNumber 01h Yes
Byte 0:1FFh => 512 Bytes data
(no checksum on data)
Frame Start Channel
Protocol
Command Data Length Data CheckSum
7Eh
If not used,
FFh
85h 01h Byte 0: Player Status Byte Yes
Frame Start Channel
Protocol
Command
Data
Length Data CheckSum
7Eh
If not used,
FFh
86h 03h
Byte 0: Player Status Byte
Byte 1: MSB(Number_of_Index)
Byte 2: LSB(Number_of_Index)
Yes
Frame Start Channel
Protocol
Command Data Length Data CheckSum
7Eh
If not used,
FFh
8Ah 06h
Byte 0: Player Status Byte
Byte 1:4 Number of free cluster
Byte 5: Cluster Size
Yes