Configuration Packets; Packet Timer Period Packet; Utc Synchronisation; Packet Timer Period - Advanced Navigation Spatial OEM Reference Manual

9.9

Configuration Packets

Configuration packets can be both read from and written to the device. On many of the
configuration packets the first byte is a permanent flag. A zero in this field indicates that the
settings will be lost on reset, a one indicates that they will be permanent.
9.9.1

Packet Timer Period Packet

Packet ID
Length
Field # Bytes
Offset
1 0
2 1
3 2
Table 66: Packet timer period packet
9.9.1.1

UTC Synchronisation

This is a boolean value that determines whether or not the packet timer is synchronised with UTC
time, with zero for disabled and one for enabled. For UTC Synchronisation to be enabled the
packet timer period must multiply into 1000000 evenly. For example if the packet timer period is
10000 (10 ms), 1000000/10000 = 100 which is valid for UTC synchronisation. If the packet timer
period is 15000 (15 ms), 1000000/15000 = 66.6666 which is not valid for UTC synchronisation. To
get the rate use the following.
Packet Timer Rate = 1000000/(Packet Timer Period) Hz
9.9.1.2

Packet timer period

This is a value in microseconds that sets the master packet timer period. The minimum value is
1000 (1 ms) or 1000 Hz and the maximum value is 65535 (65.535 ms) or 15.30 Hz.
Packet Timer Period Packet
Data Size
Type
u8 1
u8 1
u16 2
Spatial OEM Reference Manual
180
Description
Permanent
UTC synchronisation, see section 9.9.1.1
Packet timer period, see section 9.9.1.2
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