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function serialData = PR670read
% PR670read - Read data from the PR-670.
%
% Syntax:
% serialData = PR670read
%
% Description:
% Reads data chars from PR-670 until there is nothing left. Returns an
% empty matrix if there is nothing to read.
%
% Output:
% serialData (1xN char) - Data read from the PR-50.
global g_serialPort;
if isempty(g_serialPort)
error('Meter has not been initialized.');
end
% Look for any data on the serial port.
serialData = char(IOPort('Read', g_serialPort));
% If data exists keep reading off the port until there's nothing left.
if ~isempty(serialData)
tmpData = 1;
while ~isempty(tmpData)
WaitSecs(0.050);
tmpData = char(IOPort('Read', g_serialPort));
serialData = [serialData, tmpData]; %#ok<AGROW>
end
end
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