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Greetings,

You will need to use RTDX/HSRTDX over JTAG to your PC running either Matlab, National Instruments RTDX or any other legacy compatible RTDX engine on the PC to receive and display your FFT data in real time.  Such Real Time Data Exchange has certain bandwidth limitation.  You can output your FFT on an analog  port on the DSK and view it on a scope in Real Time.

Good Luck,

Sam

Hi Sam,

            Could you please throw some light as to how to interface he RTDX with the PC.

Thanks

Uday

Greetings,

Please read http://processors.wiki.ti.com/index.php/Real_Time_Data_eXchange_(RTDX) and http://processors.wiki.ti.com/index.php/High_Speed_RTDX_(HSRTDX)

Matlab/Simulink RTW supported these up to recent releases where TI dropped the interface (as 6/24/10).

National Instruments Debugging Workbench product "LABVIEW DSP TEST TOOLKIT FOR TI DSP" supported these.

TI had a PC host based low layer dll to support the interface.

Good Luck,

Sam

Hi Sam,

           Thanks a lot  for your help so far.

I have Matlab version (7.9.0)R2009b and CCs v 3.1.My target is DSK6713.I wanted to know that are they compatible for using HSRTDX.

Also,if you can tell is there some other way to view the real time output on the DSK6713 apart from using RTDX.

Thanking You

Uday

Greetings,

If your 2009b contain similar components to the following

MATLAB                                                Version 7.8        (R2009a)
Simulink                                              Version 7.3        (R2009a)
Communications Blockset                               Version 4.2        (R2009a)
Communications Toolbox                                Version 4.3        (R2009a)
Embedded IDE Link CC                                  Version 3.4        (R2009a)
Real-Time Workshop                                    Version 7.3        (R2009a)
Real-Time Workshop Embedded Coder                     Version 5.3        (R2009a)
Signal Processing Blockset                            Version 6.9        (R2009a)
Signal Processing Toolbox                             Version 6.11       (R2009a)
Target Support Package TC6                            Version 3.6        (R2009a)

Then you should be able to use it.

As I suggested earlier, you can output the Real FFT values to a DAC on the DSK and view the contour on a scope.

Good Luck,

Sam

Hi Sam,

             I have tried to see the FFT on the scope but have been unsuccessful.

  As for the RTDX,I came across a pdf  from TI of reading data from a target application.As per the instructions I loaded the h2t.out file in the folder dsk6713\rtdx\h2t  in CC studio v3.1. Then in Matlab I loaded the file h_readmsg.m.After running the file I am getting the following errors in Matlab.

Warning: 'ccsdsp' will be removed in a future version. Use 'ticcs' instead.
> In ccsdsp at 53
??? Error using ==> cu_compareAndWarnCCSVersions at 53
This version of the Embedded IDE Link does not support your
version of Code Composer Studio(TM) IDE.
The Code Composer Studio(TM) version supported in this release is 3.3.
Refer to the Embedded IDE Link data sheet
for more information on product requirements.

Error in ==> ticcs>CheckIfIdeVersionIsSupported at 192
cu_compareAndWarnCCSVersions(apiver,'warn');

Error in ==> ticcs>Connect2App_CheckIdeVersion at 174
CheckIfIdeVersionIsSupported(hccs);

Error in ==> ticcs at 58
hccs = Connect2App_CheckIdeVersion;

Error in ==> ccsdsp at 56
h = ticcs(varargin{:});

Below is the file h_readmsg.m

function void = h_readmsg()
cc = ccsdsp;
rtdx_ochan = cc.rtdx;
rtdx_ochan.enable;
open( rtdx_ochan, 'ochan', 'r' );
timeout_msg = 'Timeout';
NOMOREDATAMSG = 'No more data is available!';
errmsg = NaN;
while ( isempty( findstr( timeout_msg , errmsg ) ) )
try
% read data
data = readmsg( rtdx_ochan, 'ochan', 'int32' );
% display data
disp( data );
catch
errmsg = lasterr;
disp( NOMOREDATAMSG );
break;
end
end
close( rtdx_ochan,'ochan' );
return;

Please let me know what is the problem.Is the version of the CC studio not compatible for the RTDX here .

Thanking You

Uday 

Hi Sam,

             I have tried to see the FFT on the scope but have been unsuccessful.

 As for the RTDX,I came across a pdf  from TI of reading data from a target application.As per the instructions I loaded the h2t.out file in the folder dsk6713\rtdx\h2t  in CC studio v3.1. Then in Matlab I loaded the file h_readmsg.m.After running the file I am getting the following errors in Matlab.

Warning: 'ccsdsp' will be removed in a future version. Use 'ticcs' instead.
> In ccsdsp at 53
??? Error using ==> cu_compareAndWarnCCSVersions at 53
This version of the Embedded IDE Link does not support your
version of Code Composer Studio(TM) IDE.
The Code Composer Studio(TM) version supported in this release is 3.3.
Refer to the Embedded IDE Link data sheet
for more information on product requirements.

Error in ==> ticcs>CheckIfIdeVersionIsSupported at 192
cu_compareAndWarnCCSVersions(apiver,'warn');

Error in ==> ticcs>Connect2App_CheckIdeVersion at 174
CheckIfIdeVersionIsSupported(hccs);

Error in ==> ticcs at 58
hccs = Connect2App_CheckIdeVersion;

Error in ==> ccsdsp at 56
h = ticcs(varargin{:});

Below is the file h_readmsg.m

function void = h_readmsg()
cc = ccsdsp;
rtdx_ochan = cc.rtdx;
rtdx_ochan.enable;
open( rtdx_ochan, 'ochan', 'r' );
timeout_msg = 'Timeout';
NOMOREDATAMSG = 'No more data is available!';
errmsg = NaN;
while ( isempty( findstr( timeout_msg , errmsg ) ) )
try
% read data
data = readmsg( rtdx_ochan, 'ochan', 'int32' );
% display data
disp( data );
catch
errmsg = lasterr;
disp( NOMOREDATAMSG );
break;
end
end
close( rtdx_ochan,'ochan' );
return;

Please let me know what is the problem.Is the version of the CC studio not compatible for the RTDX here .

Thanking You

Uday 

Greetings,

Since you listed the use of R2009b, I can only speculate from the multiple error messages that Matlab is complaining about the use of CCS3.1 IDE and looking for CCS3.3 IDE.

Good Luck,

Sam