Grass Valley XSwitch Feb 01 2005 - Manual (Page 37)

36 ©2001 XSWITCH Installation and Operations Manual
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OTHER EXAMPLES:
Known: For all rest of examples, DEST=4, SRC=254.
1. command string = “4”
LEN = 1
input string for CRC = Chr$(4)+Chr$(254)+Chr$(LEN)+command string
CRC program returns:
complete CRC string = “FFFF80BC”
LSB needed from CRC = “BC”
MSB needed from CRC = “80”
packet string = Chr$(4)+Chr$(254)+Chr$(LEN)+command string
+Chr$(&HLSB)+Chr$(&HMSB)
2. command string = “1,P,255,0,0”
LEN = 11
input string for CRC = Chr$(4)+Chr$(254)+Chr$(LEN)+command string
CRC program returns:
complete CRC string = “FFFFC67F”
LSB needed from CRC = “7F”
MSB needed from CRC = “C6”
packet string = Chr$(4)+Chr$(254)+Chr$(LEN)+command string
+Chr$(&HLSB)+Chr$(&HMSB)
3. command string = “2,S”
LEN = 3
input string for CRC = Chr$(4)+Chr$(254)+Chr$(LEN)+command string
CRC program returns:
complete CRC string = “12E4”
LSB needed from CRC = “E4”
MSB needed from CRC = “12”
packet string = Chr$(4)+Chr$(254)+Chr$(LEN)+command string
+Chr$(&HLSB)+Chr$(&HMSB)
4. command string = “2,R,61,20”
LEN = 9
input string for CRC = Chr$(4)+Chr$(254)+Chr$(LEN)+command string
CRC program returns:
complete CRC string = “FFFF8758”
LSB needed from CRC = “58”
MSB needed from CRC = “87”
packet string= Chr$(4)+Chr$(254)+Chr$(LEN)+command string +Chr$(&HLSB)+Chr$(&HMSB)
5. command string = “2,3,131,20”
LEN = 10