Roving Networks WIFLY GSX Manuale Utente Scaricare il pdf (Pagina 60)

www.rovingnetworks.com Version 1.0r 9/21/2012 60

RN-WIFLYCR-UM

TIME STAMPING PACKETS

You can use the time stamping feature to append 8 bytes to a TCP or UDP packet automatically. The set ip flags 0x87

command enables the time stamp and keeps other default settings). The time stamp bits from MSB to LSB are:

User’s TCP or UDP packet data

63..56

55..48

47..40

39..32

31..24

23..16

15..8

7..0

The 8 bytes represents the 64-bit raw value of the real-time clock register. The data is appended before calculating the

TCP checksum so that the data passes through the TCP stack correctly. This register counts at 32,768 Hz. If the

timeserver function is enabled, the RTC should accurately reflect the real time. This register also counts when the module

is in sleep mode.

1 2 ... 55 56 57 58 59 60 61 62 63 64 65 ... 95 96

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Roving Networks WIFLY GSX Manuale Utente Pagina 60