Advanced Navigation GNSS Compass Reference Manual page 119

GNSS Compass Reference Manual • Advanced Navigation Packet Protocol
10.5.1 Packets Period Packet
Packets Period Packet
Packet ID
Length
Read / Write
Field # Bytes Off-
set
1 0
2 2
3 3
+
Table 94: Packets Period Packet
10.5.1.1 Flags
Bit Description
0 Permanent
1-3 Port
4 Port field valid
5-7 Reserved
8 Clear Existing Packet Periods
9-15 Reserved
Table 95: Packet period flags
10.5.1.2 Clear Existing Packets
This is a boolean field, when set to one it deletes any existing packet rates. When set to zero existing packet
rates remain. Only one packet rate can exist per packet ID, so new packet rates will overwrite existing packet
rates for the same packet ID.
10.5.1.3 Packet Period
This indicates the period in units of the packet timer period. The packet rate can be calculated as follows.
Packet Rate = 1000000/(Packet Period x Packet Timer Period) Hz
For example if the packet timer period is set to 1000 (1 ms). Setting packet ID 20 with a packet period of 50 will
give the following.
Packet 20 Rate = 1000000/(50 x 1000)
Packet 20 Rate = 20 Hz
v2.0
Data Size
Type
u16 1
u8 1
u32 4
181
2 + (5 x number of packet periods)
Read / Write
Description
Flags
Packet ID
Packet Period
Fields 2-3 repeat for additional packet
periods
Page 110 04 Nov 2021