CLN-SW-6x1-M
APANTAC LLC, 7470 SW BRIDGEPORT ROAD, PORTLAND, OR 97224
, TEL: +1 503 968 3000, FAX: +1 503 389 7921
33
CRC Byte
Table – CRC Table
Example: Route output 6 to input 3
Byte 1 (DB) is 0x20 – Device iden Device ID = 0x20 + 0 = 0x20
Byte 2 (RB) is 0x01 – Request route video output channel = 0x01
Byte 3 (IB) is 0x06 – Index output 6 = 6
Byte 4 (VB) is 0x03 – Value Input 3 = 3
Byte 5 (CB) is 0x93 – CRC code from Byte 1 to Byte 4 (CRC4)
CRC Calculation
CRC 0
= 0 (Initinal value)
CRC 1
= CRC_TABLE[CRC 0 ^
Byte1
] = CRC_TABLE[0x00 ^ 0x20] = 0x23
CRC 2
= CRC_TABLE[CRC 1 ^
Byte2
] = CRC_TABLE[0x23 ^ 0x01] = 0x9F
CRC 3
= CRC_TABLE[CRC 2 ^
Byte3
] = CRC_TABLE[0x9F ^ 0x06] = 0x8D
CRC 4
= CRC_TABLE[CRC 3 ^
Byte4
] = CRC_TABLE[0x8D ^ 0x03] = 0x93
