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Lassen-SK8 Embedded GPS Module B-5
TSIP User's Guide
TSIPPRNT
TSIPPRNT translates TSIP report packet byte streams into readable reports.
It uses the same report interface routines as TSIPCHAT, but uses 'printf'
rather than 'cprintf' so that output can be redirected to a file.
The command line for console output is:
TSIPPRNT tsip_filename
where tsip_filename is the name of a stream of TSIP report packets
collected directly from the receiver output port or from TSIPCHAT. The
command line for re-directing output to a file is:
TSIPPRNT tsip_filename > ascii_filename
Full source code is provided. TSIPPRNT is created by compiling under any
C compiler with the macro FILE_INPUT defined (BORLAND and
PORT_INPUT not defined) and with the include file TSIPINCL.H. The
following routines must be compiled:
TSIPPRNT.C (main)
TSIP_RPT.C
TSIP_IFC.C
TSIPPRNT code can be easily modified by the user to supply any ASCII
output file format that is required by adjusting the report interpreter routines
in TSIP_RPT.C, provided the necessary information is contained in the
binary input file. Software flow follows that of TSIPCHAT, except with no
user-interactive and command features.
RTCM_MON
RTCM_MON translates RTCM SC-104 Version 2.0 (Differential GPS
correction) byte streams off a serial port. It is designed to be configured to
the same port parameters as the TSIP receiver. RTCM streams can best be
tested by using the TSIP receiver itself as a decoder, using TSIPCHAT and
the '/' command (Packet 0x65) which returns Packet 0x85 listing all
differential RTCM messages decoded. RTCM_MON is provided in case the
user prefers to use a direct connection to a computer serial port to decode an
RTCM stream.
The RTCM_MON command line has no arguments. When listening to the
serial port, characters will be printed on the screen. RTCM 6-of-8 bytes
are identified by the first two bits (binary 01??????) and all other bytes are
reported as non-RTCM bytes. Once the program locks onto the RTCM
preamble and framing, it begins to report differential correction messages
for each of the satellites.
To exit the program, press [ESCAPE].
Bit-Slipping Even though the RTCM bytes are 6 bits of data and fit neatly into a 8-bit
byte once the lead bits '01' are attached, some reference receivers do not
align the RTCM data onto 8-bit boundaries for the serial link (“bit-
slipping”). RTCM_MON automatically searches for bit-slipping.