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From: JetJungle on 1 Nov 2005 17:44
I'm trying to communicate to an Ashtech Z-FX GPS receiver via RS-232 using Matlab's serial command (R14 ver 7.0.4 on XP), but no joy. This device works and passes data to GBSS and Ashtech's RCS (Commander) software.

My code

gps=serial('COM1') % No error message
set(gps, 'Baudrate', 57600, 'Terminator', 'CR') % Stop bits, parity etc as required by Receiver Reference manua. No error message
fopen(gps) % No error message
fprintf(gps, '$PASHQ, SID \r') % No error message
% above line sends a query for device serial no.
% Now for the problem
out = fscanf(gps)
% above line results in error message:
Warning: A timeout occurred before the Terminator was reached. out = ''

The terminator is defined as 'CR' and I've tried different ways of parsing it in fprintf(gps, '$PASHQ, SID \r'). E.g
fprintf(gps, '$PASHQ, SID\r')
fprintf(gps, '$PASHQ, SID')
fprintf(gps, '$PASHQ, SID \n') %new line, not CR
fprintf(gps, '$PASHQ, SID\n')
fprintf(gps, '$PASHQ, SID \r', 'async')
even inserted a pause(0.15) before out = fscanf(gps)
None of these options seem to work

Any suggestions?

%Pass a GPS query
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