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

25
1.5. Turn Flow
Control On
Dec
Hex
ASCII 254 58
FE 3A
■ :
Full Empty
Full Empty
Full Empty
Enables simple flow control. The display will return a single, Xoff, byte to the host when the display buffer is
almost full and a different, Xon, byte when the buffer is almost empty. Full value should provide enough room for
the largest data packet to be received without buffer overflow. No data should be sent to the display between full
and empty responses to permit processing. Buffer size is 128 bytes. Not available in I
2
C. Default off.
Full 1 byte, number of bytes remaining before buffer is completely full, 0 < Full < Empty < 128
Empty 1 byte, number of bytes remaining before buffer can be considered empty enough to accept more data
1.6. Turn Flow
Control Off
Dec
Hex
ASCII 254 59
FE 3B
■ ;
Disables flow control. Bytes sent to the display may be permitted to overflow the buffer resulting in data loss.
1.7. Set Flow Control
Response
Dec
Hex
ASCII 254 60
FE 3C
■ <
Xon Xoff
Xon Xoff
Xon Xoff
Sets the values returned for almost full and almost empty messages when in flow control mode. This command
permits the display to utilize standard flow control values of 0x11 and 0x13, note that defaults are 0xFF and 0xFE.
Xon 1 byte, value returned when display buffer is almost empty, permitting transmission to resume
Xoff 1 byte, value returned when display buffer is almost full, signalling transmission to halt