Dustin Allensworth Software Development Systems/RTDX Team ABSTRACT Rea

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Write RTDX Host Application Using MATLAB
Dustin Allensworth Software Development Systems/RTDX Team ABSTRACT Real-Time Data Exchange (RTDX) technology developed Texas Instruments that enables real-time bi-directional communication between digital signal processor (DSP) microcontroller host application. This document describes steps needed write RTDX host application using MATLAB Developer's Texas Instruments DSP. MATLAB product MathWorks, Inc. Developer's extension MATLAB, version (release 12). This document assumes that have Code Composer Studio higher MATLAB, version with Developer's installed. also assumes that familiar with using MATLAB running simple RTDX target application within Code Composer Studio. familiar with MATLAB, please review MATLAB tutorial. familiar with running simple RTDX target application within Code Composer Studio, please review RTDX tutorial.
Contents Reading Data from Target Application Demonstration Reading Data from Target Application.2 Writing Data Target Application Demonstration Writing Data Target Application
Trademarks property their respective owners.
SPRA386
Reading Data from Target Application
following steps describe basic instructions that enable setup MATLAB read data messages from target application. MATLAB script (h_readmsg.m) containing these instructions attached this Application Report. section 1.1, Demonstration Reading Data from Target Application, details using this script. Declare function.
function void h_readmsg()
handle Code Composer Studio.
ccsdsp;
handle RTDX channel "ochan".
rtdx_ochan cc.rtdx;
Enable RTDX.
rtdx_ochan.enable;
Open RTDX channel reading.
open( rtdx_ochan, 'ochan',
Read data within loop until more data available.
timeout_msg 'Timeout'; NOMOREDATAMSG more data available!'; errmsg NaN; while isempty( findstr( timeout_msg errmsg read data data readmsg( rtdx_ochan, 'ochan', 'int32' display data disp( data catch errmsg lasterr; disp( NOMOREDATAMSG break;
Close RTDX channel.
close( rtdx_ochan, `ochan'
function.
return;
Demonstration Reading Data from Target Application
Below instructions running MATLAB script h_readmsg.m conjunction with target application t_write.out t_wrtsa.out. Copy file h_readmsg.m MATLAB6p1\work directory.
Write RTDX Host Application Using MATLAB
SPRA386
Start Code Composer Studio. Load target application selecting command Load Program from Code Composer Studio File menu. Load Program dialog box, open file t_write.out t_wrtsa.out. Code Composer Studio version 1.*, target applications located directories where <install-dir> location where installed Code Composer Studio product <tgt-dir>
c6000 c5400 c5500 tms470
Code Composer Studio version 2.0, target applications located directories where <install-dir> location where installed Code Composer Studio product <tgt-dir>
dsk6211 dsk6711 evm6201 sim62xx sim64xx dsk5402 sim54xx evm5510 sim55xx emuarm7 emuarm9
Enable RTDX. enable RTDX Code Composer Studio 1.*: From Code Composer Studio Tools menu, select RTDX. From RTDX window, select RTDX Enable from list window. enable RTDX Code Composer Studio 2.0: From Code Composer Studio Tools menu, select RTDX. From RTDX sub-menu, select Configuration Control. From RTDX window, select Enable RTDX from check-box window.
target application selecting command from Code Composer Studio Debug menu. Start MATLAB. From MATLAB Command Window, MATLAB script, h_readmsg.m. When target application t_write.out executed, values 0-99 will appear MATLAB Command Window. When target application t_wrtsa.out executed, values 0-499 will appear MATLAB Command Window.
Write RTDX Host Application Using MATLAB
SPRA386
Writing Data Target Application
following steps describe basic instructions that enable setup MATLAB send data target application. MATLAB script (h_writemsg.m) containing these instructions attached this Application Report. section 2.1, Demonstration Writing Data Target Application, details using this script. handle Code Composer Studio. ccsdsp; handle RTDX. rtdx_ichan cc.rtdx; Enable RTDX. rtdx_ichan.enable; Open target-declared, RTDX channel writing. open( rtdx_ichan, 'ichan', Write data target application. writemsg( rtdx_ichan, 'ichan', int32(data)
Demonstration Writing Data Target Application
Below instructions running MATLAB script, h_writemsg.m, conjunction with target application t_rdsa.out. Copy file h_writemsg.m MATLAB6p1\work directory. Start Code Composer Studio. Load target application selecting command Load Program from Code Composer Studio File menu. Load Program dialog box, open file t_rdsa.out. Code Composer Studio version 1.*, target application located directory where <install-dir> location where installed Code Composer Studio product <tgt-dir>
c6000 c5400 c5500 tms470
Code Composer Studio version 2.0, target application located directory where <install-dir> location where installed Code Composer Studio product <tgt-dir>
dsk6211 dsk6711 evm6201 sim62xx sim64xx dsk5402 sim54xx evm5510 sim55xx emuarm7 emuarm9
Write RTDX Host Application Using MATLAB
SPRA386
Enable RTDX. enable RTDX Code Composer Studio version 1.*: From Code Composer Tools menu, select RTDX. From RTDX window, select RTDX Enable from drop-down list. enable RTDX Code Composer Studio version 2.0: From Code Composer Tools menu, select RTDX. From RTDX submenu, select Configuration Control. From RTDX window, select checkbox labeled "Enable RTDX".
target application selecting command from Code Composer Studio Debug menu. Start MATLAB. From MATLAB Command Window, MATLAB script h_writemsg.m. values 0-499 will appear MATLAB Command Window.
Write RTDX Host Application Using MATLAB
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