Matrix Orbital GLK19264-7T-1U - Manual (Page 50)

Host Display Comments
0xFE Command Prefix
0x24 Upload Font File Command
0x01 Reference ID
0x19 Size (LSB)
0x00 Size (MSB)
0x01 Confirmation Byte
0x01 Confimation Byte
0x05 Font Width
0x05 Echo Font Width
0x01 Confimation Byte
0x07 Font Height
0x07 Echo Font Height
0x01 Confimation Byte
0x49 Font ASCII Start Value
0x49 Echo Font ASCII Start Value
0x01 Confimation Byte
... ... ...
0x60 Last Font File Byte
0x60 Echo Last Font File Byte
0x01 Confirm Upload Finished
Table 55: Upload Protocol
data that you wish to transfer, LSB to MSB. The LSB must be transmitted first followed by the MSB. After
receiving the MSB the display module will send a confirm byte, 0x01, if the file fits and continue, or decline
byte, 0x08, and terminate the session.
Byte Description
0x01 Confirm: Will continue the file transfer.
0x08 Decline: Terminate the session.
The last part of uploading a font file is to upload the file data. After transmitting each byte of the file the
module will echo the byte and wait for a confirmation byte of 0x01 until the file has completed uploading.
Below is an example of uploading the font file which we created in Section 5.1.2 on page 20.
At times that the display or the host sees anything else other than 0x01 for confirmation (usually a 0x08)
the upload is aborted.
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