e z L C D -‐ 4 0 5
|
117
Rev.
© 2016 Earth Computers Tech. Inc.
About the File ID:
File ID is returned in the response to the
SD_FILE_CREATE
or
SD_FILE_OPEN
command. It
identifies the file after it has been opened. Since maximum 2 files may be concurrently opened,
the File ID should be: 1 or 2. Values higher than 2 are interpreted as 2 and 0 is interpreted as 1.
ezLCD Response
After receiving the SD_FILE_WRITE command, the ezLCD responds with either of the following
sequences:
In case of the
success
:
7
6
5
4
3
2
1
0
0
0
1
1
1
0
1
1
Byte 0:
39
hex,
59
dec
In case of an
error
:
7
6
5
4
3
2
1
0
0
0
1
1
1
1
1
0
Byte 0:
3E
hex,
62
dec
The ezLCD response is sent through the same interface, which received the SD_FILE_WRITE
command.
Example:
The following flow chart on the next page shows an example of writing 16 bytes into the
created file MyFile.dat
Summary of Contents for ezLCD-405
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