DSP/BIOS and RTDX Using MATLAB, Visual C++, Visual Basic, and LabVIEW - Digital Signal Processing and Applications with the C6713 and C6416 DSK - page 313

% RTDX_MATLAB_sim.m MATLAB-DSK interface using RTDX. Calls CCS
%loads .out file.Data transfer from MATLAB->DSK,then DSK->MATLAB

indata(1:10) = [1:10]; %data to send to DSK

ccsboardinfo %board info

cc = ccsdsp('boardnum',0); %set up CCS object

reset(cc) %reset board

visible(cc,1); %for CCS window

enable(cc.rtdx); %enable RTDX

if ~isenabled(cc.rtdx)
error('RTDX is not enabled')
end
cc.rtdx.set('timeout', 20); %set 20sec time out for RTDX
open(cc,'rtdx_matlab_sim.pjt'); %open project
load(cc,'./debug/rtdx_matlab_sim.out'); %load executable file
run(cc); %run

configure(cc.rtdx,1024,4); %configure two RTDX channels

open(cc.rtdx,'ichan','w'); %open input channel

open(cc.rtdx,'ochan','r'); %open output channel

pause(3) %wait for RTDX channel to

open
enable(cc.rtdx,'ichan'); %enable channel TO DSK

if isenabled(cc.rtdx,'ichan')
writemsg(cc.rtdx,'ichan', int16(indata)) %send 16-bit data to DSK
pause(3)
else
error('Channel ''ichan'' is not enabled')
end
enable(cc.rtdx,'ochan');

%enable channel FROM DSK

if isenabled(cc.rtdx,'ochan')
outdata=readmsg(cc.rtdx,'ochan','int16') %read 16-bit data from DSK
pause(3)
else
error('Channel ''ochan'' is not enabled')
end
if isrunning(cc), halt(cc);

%if DSP running halt

processor

end
disable(cc.rtdx); %disable RTDX
close(cc.rtdx,'ichan'); %close input channel
close(cc.rtdx,'ochan'); %close output channel
FIGURE 9.7. MATLAB program that runs on the host PC to illustrate RTDX with
MATLAB. Buffer of data sent from MATLAB to the DSK ( rtdx_matlab_sim.m ).

Access MATLAB and make the following directory (path) active:

c 6713 \ myprojects rtdx \ _ matlab _ sim

Within MATLAB, run the ( .m ) file, typing rtdx _ matlab _ sim . Verify that the exe-
cutable file is being loaded (through the CCS window) and run. Within the CCS
window, the following messages should be printed: Waiting to read, Read completed,