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user's manual R5975236-r3
user's manual R5975236-r3
Checksum byte
The checksum byte is used to detect errors during transmission or reception.
Formula :
Checksum byte
= (Projector a Command bytes + Data bytes) modulo 256
Stop byte
The stop byte informs the projector (in case of transmission) or the computer
(in case of reception) that the data transfer is complete and that the
interpretation of the command and data bytes can start.
Any command byte, data byte or checksum byte that equals \x80, \xfe
or \xff has to be converted !
Transmission :
- Instead of \x80, send \x80 followed by \x00.
- Instead of \xfe, send \x80 followed by \x7e.
- Instead of \xff, send \x80 followed by \x7f.
Reception :
- Replace \x80 followed by \x00 with \x80.
- Replace \x80 followed by \x7e with \xfe.
- Replace \x80 followed by \x7f with \xff..
Checksum byte
The checksum byte is used to detect errors during transmission or reception.
Formula :
Checksum byte
= (Projector a Command bytes + Data bytes) modulo 256
Stop byte
The stop byte informs the projector (in case of transmission) or the computer
(in case of reception) that the data transfer is complete and that the
interpretation of the command and data bytes can start.
Any command byte, data byte or checksum byte that equals \x80, \xfe
or \xff has to be converted !
Transmission :
- Instead of \x80, send \x80 followed by \x00.
- Instead of \xfe, send \x80 followed by \x7e.
- Instead of \xff, send \x80 followed by \x7f.
Reception :
- Replace \x80 followed by \x00 with \x80.
- Replace \x80 followed by \x7e with \xfe.
- Replace \x80 followed by \x7f with \xff..
Chapter 1: Communications basics
Chapter 1: Communications basics
communication protocol
communication protocol
Содержание BD2100
Страница 1: ...BARCO PROJECTION SYSTEMS Date 10 04 98 R5975236_r03 SERIAL COMMUNICATION LCD PROJECTOR USER S MANUAL ...
Страница 2: ...i 1 user s manual R5975236 r3 Contents ...
Страница 6: ...1 1 user s manual R5975236 r3 Chapter 1 Communication basics ...
Страница 18: ...2 1 user s manual R5975236 r3 Chapter2 Elementarycommands Chapter 2 Elementary commands ...
Страница 60: ...3 1 user s manual R5975236 r3 Chapter3 Advancedcommands Chapter 3 Advancedcommands ...
Страница 163: ...a 1 user s manual R5975236 r3 Appendixa Commandsummary2 Appendix a Command summary 2 ...
Страница 167: ...b 1 user s manual R5975236 r3 Appendixb Commandsummary3 Appendix b Command summary 3 ...