Trimble Outdoors SK8 - Manual (Page 65)

Lassen-SK8 Embedded GPS Module A-1
A Trimble Standard Interface
Protocol
The Trimble Standard Interface Protocol (TSIP) provides the system designer with over
75 commands that may be used to configure a GPS receiver for optimum performance in a
variety of applications. TSIP enables the system designer to customize the configuration
of a GPS module to meet the requirements of a specific application.
This appendix provides the information needed to make judicious use of the powerful
features TSIP has to offer, to greatly enhance overall system performance and to reduce
the total development time. The reference tables beginning on Page 2 will help you
determine which packets apply to your application. For those applications requiring
customizing, see Page 3 for a detailed description of the key setup parameters. Application
guidelines are provided for each TSIP Command Packet, beginning on
Page 20.
A.1 Interface Scope
The Trimble Standard Interface Protocol is used in Trimble 6-channel and 8-channel
receiver designs. The protocol was originally created for the Trimble Advanced
Navigation Sensor (TANS) and is colloquially known as the TANS protocol even though
the protocol applies to many other devices.
The Lassen-SK8 has two independently configurable serial I/O communication ports.
Port1 is a bi-directional control and data port utilizing a Trimble Standard Interface
Protocol (TSIP) or Trimble ASCII Interface Protocol (TAIP). Port 2 is a bi-directional
port used to receive differential GPS (DGPS) corrections in the industry standard
RTCMSC-104 format and for output of industry standard ASCII NMEA sentences. Port 1
can also be configured to TAIP I/O using the TSIP command. The dual data I/O port
characteristics and other options are user programmable and stored in non-volatile
memory.
The TSIP protocol is based on the transmission of packets of information between the user
equipment and the unit. Each packet includes an identification code (1 byte, representing 2
hexadecimal digits) that identifies the meaning and format of the data that follows. Each
packet begins and ends with control characters.