EarthLCD ezLCD-405, Руководство пользователя

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e z L C D -­‐ 4 0 5 | 98
Rev.
© 2016 Earth Computers Tech. Inc.
1.7.34 SD_FILE_DELETE
Description: Deletes the SD file
Supported file systems : FAT12, FAT16, FAT32
Code: 7D hex, 125 dec
7 6 5 4 3 2 1 0
Byte 0: Command
Byte 2: First Character of the file path
Byte 3: Second Character of the file path
Byte n: Last Character
Byte n+1: NULL
Notes: SD card has to be formatted in the supported file system.
A read-­‐only or opened file cannot be deleted.
About the File Path:
·∙ File Path specifies the full path to the file on SD including directory, filename and extension
·∙ Directories should be separated by: / ( not by: \ like in Windows and DOS).
·∙ File Path is not case-­‐sensitive. The drive and root directory do not have to be indicated, for
example, both: A:/Cat/Jumped/Over.txt and cat/jumped/over.TXT specify the same file.
·∙ Long file names are supported, however the File Path (directory + filename + extension +
NULL) may not exceed 64 bytes.
·∙ Wildcards are not allowed.
ezLCD Response
After receiving the SD_FILE_DELETE command, the ezLCD responds with either of the following
sequences:
In case of the success :
SD_FILE_CREATE
ASCII
ASCII
0
ASCII
Pa
th
to
th
e
fil
e
on
S
D
(N
U
LL
-­‐te
rm
in
ate
d
st
rin
g)