Topcon Gnss Input; Anpp Input; Anpp Output; Disable Gnss - Advanced Navigation Spatial FOG Dual Reference Manual

12.4.9

Topcon GNSS Input

This function is designed for interfacing Spatial FOG Dual with a Topcon GNSS receiver.
It accepts data in the GRIL TPS binary format and expects messages PG and VG at
rates higher than 1 Hz.
12.4.10

ANPP Input

This function accepts data in the ANPP format as specified in section 13.
12.4.11

ANPP Output

This function outputs data in the ANPP format as specified in section 13. For packets to
be sent out they must be requested through another GPIO functioning as ANPP input.
12.4.12

Disable GNSS

This function accepts a digital input with a low state enabling the GNSS and a high
state disabling the GNSS.
12.4.13

Disable Pressure

This function accepts a digital input with a low state enabling the atmospheric
pressure sensor and a high state disabling the atmospheric pressure sensor.
12.4.14

Set Zero Orientation Alignment

This function accepts a digital input. The input is normally low and a transition from
low to high causes Spatial FOG Dual to set it's alignment so that the current
orientation is zero. Due to the risk of exhausting the flash cycles, the change is not
permanent and will disappear on reset. To make it permanent the Installation
Alignment Packet must be read and then sent back to Spatial FOG Dual with the
permanent flag set. This function requires de-bouncing if attached to a switch.
12.4.15

System State Packet Trigger

This function accepts a digital input. The input is normally low and a transition from
low to high causes Spatial FOG Dual to send the system state packet. This function
requires de-bouncing if attached to a switch.
12.4.16

Raw Sensors Packet Trigger

This function accepts a digital input. The input is normally low and a transition from
low to high causes Spatial FOG Dual to send the raw sensors packet. This function
requires de-bouncing if attached to a switch.
12.4.17

RTCM Differential GNSS Corrections Input

This function accepts RTCM differential GPS corrections. This allows for Differential
GNSS or RTK with Spatial FOG Dual's internal GNSS receiver.
Spatial FOG Dual Reference Manual
Page 83 of 138
Version 1.0
26/06/2015