31
File Upload Protocol
Once a bitmap or font file has been created and paired to its command it must be sent using a file
protocol developed specifically for Matrix Orbital displays. Once a file upload command has been sent
requesting a unique reference number and specifying the file size required, the display will respond
indicating whether it has enough room to save the file or not. As is the case throughout the upload
protocol, a response of 1 will indicate confirmation while an 8 corresponds to rejection and will
terminate the session.
Table 29: Upload Protocol Responses
Value
Action
Description
1
Confirm
Transfer successful, upload continues
8
Decline
Transfer failed, abort upload
Once a file is confirmed to fit within the display, the upload will begin. A protocol is used here to ensure
each byte is uploaded successfully. After each byte is sent, the module will echo it back to the host. It
should then be checked against the value originally sent before a confirmation byte of 1 is returned. If
the transmitted and echoed values do not match the upload should be aborted by sending a value of 8
instead. The upload will continue in this manner as indicated by the examples below which utilize
familiar font and bitmap files.
Table 30: Font Upload Protocol
Host
Display
Comments
254
Command Prefix
36
Upload Font File Command
1
Reference ID
31
Font File LSB
0
Font File MSB
1
Size Confirmation
5
First Font Data Byte
5
Echo Data Byte
1
Confirm Data Byte
...
...
...
96
Last Font Data Byte
96
Echo Data Byte
1
Confirm Data Byte
Table 31: Bitmap Upload Protocol
Host
Display
Comments
254
Command Prefix
94
Upload Bitmap File Command
1
Reference ID
5
Bitmap File LSB
0
Bitmap File MSB
1
Size Confirmation
5
First Bitmap Data Byte
5
Echo Data Byte
1
Confirm Data Byte
...
...
...
224
Last Bitmap Data Byte
224
Echo Data Byte
1
Confirm Data Byte
It should be noted that the display has a timeout setting of 2.1 seconds before it resets to prevent it
from hanging during the upload process. Upon reset, the values 254 and 212 will be returned to
indicate an error or lengthy delay has occurred in the upload process. If everything goes smoothly, the
protocol will end with the host transmitting a
final confirmation byte and the font will be stored in the
display ready for any application.
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
GLK24064-25-WB-V
LCD GRAPHIC DISPL 240X64 BLU/WHT
GLT240128-FGW-VPT
LCD TOUCH 128X240 WHT/GRY
GM2BB50BM0C
LED WHITE 5000K 150MA 0.5W
GM5YJ01210A
LED ORANGE CLEAR 6050 SMD
GU128X128D-3900B
VACUUM FLUORESCENT DISPLAY
GU144X16D-7053B
VACUUM FLUORESCENT DISPLAY
GU160X32-800B
MODULE VF GRAPHIC DISPLAY 160X32
GU160X80E-7900B
VACUUM FLUORESCENT DISPLAY
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