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Function Control
The GPIO6 signal (pin no. 54 on J400) is an active-low input that performs multiple functions depending on how
long the signal is LOW (GND).
Start/stop data recording to file(s)
Toggle occupation mode between static and dynamic
Turn the baud rate of serial port A to 9600 bps
No action
a. Occupation mode switch is selected in TRU.
You can also clear the NVRAM, set all parameters to default values, and power cycle the board using a
combination of PBTN* and GPIO6. Here is how you can do this:
•
Pull the PBTN* signal LOW (GND) for more than 3 seconds and less than 10 seconds to turn the board off.
•
Pull the GPIO6 signal LOW (GND).
•
Pull the PBTN* signal LOW (GND) for about one second. Pull the PBTN* signal HIGH (3.3V) while continuing
to hold the GPIO6 signal LOW.
•
Wait until the STAT and REC LEDs are green.
•
Wait until the STAT and REC LEDs blink orange.
•
Pull the GPIO6 signal HIGH (3.3V) while the STAT and REC LEDs blink orange.
Use an external pull-up resistor of 10 kOhm to 3.3V for the GPIO6 signal.
Firmware Features
Real-Time Kinematic Engine
The B111 board incorporates a highly innovative RTK engine developed at Topcon. It offers a host of new
features and benefits blended with exceptional processing power. With the new RTK engine, the B111 provides
unrivaled positioning system efficient, secure, and appropriate for any real-time application that requires
accurate positioning solutions.
The following are some of the unique abilities available in the Topcon's proven RTK engine.
•
Designed for world-wide use and ready for GNSS challenges of the field
•
A greatly reduced amount of time needed for getting a fix
•
Perfectly tailored to both network and single reference station RTK techniques
•
Well suited for all kinds of baselines (short, medium, long)
•
Continuous monitoring, catching and removing measurement anomalies to secure reliable positioning
•
Carefully geared to handle up to 1 minute data-link delays
•
Selecting among different linear combinations of observations
•
New GNSS observations, such as GPS/GLONASS L2C, as well as Galileo E1, BeiDou B1/B2 and SBAS L1 are
readily and seamlessly accommodated
•
Instant controllability and flexibility that lets you optimize the engine performance over an extensive set of
commands
•
A variety of advanced options, specifically: a dedicated minimal signal-to-noise ratio for each satellite signal;
feeding the engine with various observations; number of ambiguity subsets resolved per epoch, and more.
Further Reading:
How to configure the B111 for RTK base/rover using GRIL commands in the
Firmware Features
Table 15. FN Functions
Function
P/N: 1018409-01
Duration of LOW state
More than 1 second and less than 5 seconds
Less than 1 second while the file(s) is open
More than 5 seconds and less than 8 seconds
More than 8 seconds
GRIL Reference
a
Manual.
15
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