Matrix Orbital GLK24064-25 Legacy - Manual (Page 41)

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12. Filesystem
12.1. Wipe
Filesystem
Dec
Hex
ASCII 254 33 89 33
FE 21 59 21
■ ! Y !
Completely erase all fonts and bitmaps from a graphic display. Extended length of the command is intended to
prevent accidental execution. To ensure filesystem integrity, cycle power to the display after erasure.
12.2. Delete a File Dec
Hex 254 173
FE AD
Type ID
Type ID
Removes a single font or bitmap file given the type and unique identification number. Cycle power after deletion.
Type 1 byte, 0 for font or 1 for bitmap
ID 1 byte, unique identification number of font or bitmap to be deleted
12.3. Get Filesystem
Space
Dec
Hex 254 175
FE AF
Returns the amount of space remaining in the display for font or bitmap uploads.
Response 4 bytes, number of bytes remaining in 32KB memory, LSB to MSB
12.4. Get Filesystem
Directory
Dec
Hex 254 179
FE B3
Returns a directory to the contents of the filesystem. The total number and type of each entry will be provided.
Response variable length, 1 byte representing number of entries followed by 4 identification bytes for each entry
Table 38: Filesystem Identification Bytes
Byte 3 2 1 0
Description Size MSB Size LSB Type/ID Flag
Table 39: Extended Byte Descriptions
Size MSB most significant byte of the file size
Size LSB least significant byte of the file size
Type/ID MSB designates file type, 0 for font or 1 for bitmap, remaining bits indicate ID number
Flag a value of 0 indicates entry is not in use