External Mode for a custom STF

I'm trying to incorporate external mode for a custom target that I built. One of the files I include (ext_work.c) keeps giving me an error when I compile. This is just a snippet of the code that includes a full function:

void rtExtModePauseIfNeeded(RTWExtModeInfo *ei,
                            int_T numSampTimes,
                            boolean_T *stopReqPtr)
                            {
    while((modelStatus == TARGET_STATUS_PAUSED) && !startModel && !(*stopReqPtr)) {
        rt_ExtModeSleep(0L, 375000L);
        rt_PktServerWork(ei,numSampTimes,stopReqPtr);
#ifndef EXTMODE_DISABLESIGNALMONITORING
        rt_UploadServerWork(numSampTimes);
#endif
    }
    startModel = false; /* reset to false - if we were stepped we want to
                         *                  stop again next time we get
                         *                  back here.
                         */
} /* end rtExtModePauseIfNeeded */

When I try to compile, I get the following error:

ext_work.c:127:8: error: expected identifier or '(' before '{' token

(line 127 refers to the 4th line of the sample code).

Can anyone help with what might be wrong?

Many thanks!

[Walter Roberson]

My suspicion is that the actual problem is just before that line, if it thinks that it is still inside a function definition.

Answer 1

[John BG]

have you tried either

removing the ')' at the end of the previous line pointed by the error, the line ending with boolean_T *stopReqPtr

pairing the ')' of line boolean_T *stopReqPtr) with '('

if you find these lines useful would you please mark my answer as Accepted Answer?

To any other reader, please if you find this answer of any help, click on the thumbs-up vote link,

thanks in advance for time and attention

John BG

<mailto:[e-mail] [e-mail]>

[Giorgi]

Well no the parenthesis is paired since this:

void rtExtModePauseIfNeeded(RTWExtModeInfo *ei,
           int_T numSampTimes,
          boolean_T *stopReqPtr)

is the same as this:

void rtExtModePauseIfNeeded(RTWExtModeInfo *ei, int_T numSampTimes, boolean_T *stopReqPtr)

I also can't remove it since its the function decleration

[John BG]

ok,

in the function declaration try

adding 3 dots after each comma remove the 'void' remove the pointer '*' declare inside the function

rtExtModePauseIfNeeded( ei,...
            numSampTimes,...
           stopReqPtr)

in MATLAB you don't need that, and the comment character is '%' .

for just

• call rt_ExtModeSleep
• call rt_PktServerWork
• if EXTMODE_DISABLESIGNALMONITORING
• call rt_UploadServerWork

Why are you writing C code anyway, because you want this function to be called by a MATLAB function?

can you show the MATLAB function that calls this c function and how do you declare in MATLAB the variables that you are using here?

[Walter Roberson]

All those removals proposed are not appropriate under the circumstances. This is C code being invoked from Simulink as part of a custom real time deployment and it should not be rewritten in MATLAB.

[John BG]

ok, thanks for explaining

[Michael]

@Giorgi Did you ever resolve this issue. We are facing a similar problem.