EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 310, R.O.C.
http://www.emt.com.tw
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4.3.3 Data Logging Programming Description
4.3.3.1 Configuring for Data Logging
1. Send
LogConfig Set
command to the receiver to enable data logging.
2. The receiver will start logging data and return the
LogConfig Info
message three
times. The logged receiver position-velocity-time data is stored in a circular buffer.
When the buffer becomes full, oldest data is over-written.
3. The
LogConfig Read
command may be issued to request sending of
LogConfig
Info
message again three times.
4.3.3.2 Retrieving Logged Data
1. Issue
LogData Dump
command to the receiver.
2. Upon reception of the
LogData Dump
command, the receiver disables data
logging automatically and starts to output the logged data either in NMEA format or
in binary
LogData
message format, according to the format requested in the
previously issued
LogData Dump
command, until all logged data is sent.
3. Another issue of the
LogData Dump
command to the receiver will cause step 2 to
be performed again; the same set of data will be sent.
4. To continue data logging operation, send
LogConfig Set
command to the receiver
again. Newly logged data will be placed right after the latest logged data in the
circular buffer. If the
LogData Dump
command is issued and the data buffer is not
used up yet, both the newly logged data and the previously logged data will be
output. Note that
LogData Dump
command dumps everything in the data buffer.
5. To ensure only newly logged data is output after
LogConfig Set
command is
issued, send
LogData Erase
command to clear the log buffer prior to sending the
LogConfig Set
command.
