How to save data from serial port to an array in Matlab gui? -
i want read serail port every 0.1s , append incoming data array, can show data time array seems store newest data. can tell me why? thanks. here code:
function wtsmat_openingfcn(hobject, eventdata, handles, varargin) ..... %%tact array store data tact=ones(1,84); handles.tact=tact; % update handles structure guidata(hobject, handles); here setting of scom
scom=serial(com_cur,'baudrate',baud_curnum,'parity','none','databits',8,'stopbits',1,... 'inputbuffersize',1000,... 'timeout',1,... 'timerperiod',0.1,... 'timerfcn',{@mycallback,handles}); fopen(scom); handles.scom=scom; guidata(hobject,handles); here mycallback function
function mycallback(scom,bytsavailable,handles) %start single frame acquisition showdata=ones(84,1); showwin=ones(14,6); %%get previous data handles tact=handles.tact; fwrite(scom,uint8(hex2dec(['aa';'aa';'aa';'20';'01';'00';'00';'8f';'83']))); mydata = fread(scom,183);%read raw data sensor i=1:84 showdata(i,1)=mydata(13+i*2)*16*16+mydata(12+i*2); end %%append tact array tact=[tact;showdata']; handles.tact=tact; .... save tact when close scom
function pb_close_callback(hobject, eventdata, handles) % hobject handle pb_close (see gcbo) % eventdata reserved - defined in future version of matlab % handles structure handles , user data (see guidata) scom=handles.scom; %stop acquising fwrite(scom,uint8(hex2dec(['aa';'aa';'aa';'22';'00';'00';'0e';'76']))); fclose(scom); tact=handles.tact; save('tact.mat','tact');
try creating buffer , saving new data in last position @ every iteration
buf_len = 100; index = 1:buf_len; %initialize array arrayofdata = zeros(buf_len,1); % data here. let's new value theta arrayofdata = [ arrayofdata (2:end) ; theta ]; plot(index,tdata,'r','linewidth',2);
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