simgps.m

用matlab编程实现GPS数据的采集与存储。

file='G:\GPS\gga.txt';
fid=fopen(file,'r');
rawdata=textread(file,'%s',-1); %data is a cell array
fclose(fid);
%make sure COM1 correctly open
s1=instrfind({'Port'},{'COM6'});
if exist('s1')==0 || length(s1)==0
  s1=serial('COM6','BaudRate',115200,'InputBufferSize',256);
  s1.TimeOut=30;
end
d=get(s1,{'Type','Name','Port','Status'});
if strcmp(d{1,4},'closed')==1
  fopen(s1);
end

%10 Hz
t = timer('StartDelay', 1,'Period', 0.1,'TasksToExecute', 8000,...
          'ExecutionMode','fixedRate');
  set(t, 'TimerFcn', {@my_callback_fcn, s1,rawdata});  % actual parameters;prototype declared in the beginning of function my_callback_fcn
   set(t, 'UserData', 1);
 start(t);