MATLAB EMBEDDED IDE LINK 4 - FOR USE WITH TEXAS INSTRUMENTS CODE COMPOSER STUDIO Guía de usuario descargar pdf (Pagina 56)

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101

2 Automa tion Interface

and exit the program, or respond in s ome way. When you are writing or

reading data to your processor in a script or M-ﬁle, checking the status of

the channels can help you avoid errors during execution.

As your application runs you may ﬁnd it helpful to display progress

messages. In this case, the program directed MATLAB software to print a

message as it reads the data from the p rocessor by adding the function

disp('writing to processor...')

Function cc.rtdx.writemsg('ichan', int16(indata)) results in 20

messages stored on the processor. He re’s how.

When you write

indata to the processor, the following code running on the

processor takes your input data from

ichan, adds one to the values and

copiesthedatatomemory:

while ( !RTDX_isInputEnabled(&ichan) )

{/* wait for channel enable from MATLAB */}

RTDX_read( &ichan, recvd, sizeof(recvd) );

puts("\n\n Read Completed ");

for (j=1; j<=20; j++) {

for (i=0; i<MAX; i++) {

recvd[i] +=1;

}

while ( !RTDX_isOutputEnabled(&ochan) )

{ /* wait for channel enable from MATLAB */ }

RTDX_write( &ochan, recvd, sizeof(recvd) );

while ( RTDX_writing != NULL )

{ /* wait for data xfer INTERRUPT DRIVEN for C6000 */ }

}

Program int16_rtdx.c contains this source code. You can ﬁnd the ﬁle in a

folder in the

..\tidemos\rtdxtutorial directory.

5 Type the following to check the number of available messages to read from

the processor.

num_of_msgs = cc.rtdx.msgcount('ochan');

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MATLAB EMBEDDED IDE LINK 4 - FOR USE WITH TEXAS INSTRUMENTS CODE COMPOSER STUDIO Guía de usuario Pagina 56

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