How do I call a function in my code from the debugger?

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Harjit Singh

• April 22, 2010 05:44

I am using CrossStudio for ARM for a robotics project.

During development, I capture data on the robot which I then want to upload.

So, I download my program and run it from the debugger and then I disconnect the debugger. The robot does its thing and stores data to RAM and then I attach the debugger to the target.

To send the data back, I break into the target and then manually change the PC to the routine that writes data back to the host and tell the debugger to run to the return for the routine.

Is there a way to tell CrossStudio to jump to one of my routines i.e. type "call vWriteDataHost" into CrossStudio so that I don't have to manually look up the address of vWriteDataHost and then modify the PC?

Thanks,

Harjit

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  Michael Johnson

  • April 22, 2010 10:21

  You can call functions from the debug immediate window - don't call functions that use debug_printf.

   

  Regards

  Michael

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  Harjit Singh

  • April 23, 2010 18:46

  I couldn't find any info. in the help file(s) on the debug immediate window, the commands it supports and their syntax.

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  Michael Johnson

  • April 25, 2010 07:20

  C expressions e.g.

  fn(3)

  Regards

  Michael

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  Harjit Singh

  • September 23, 2010 05:58

  I found the Debug Immediate window but when I type in my function name, it doesn't appear to run. I also then tried putting a breakpoint in the routine and the breakpoint doesn't fire.

  Also, is there any documentation on the capabilites and usage of the Immediate window?

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  Michael Johnson

  • September 23, 2010 09:42

  Are you stopped on a breakpoint when you type in the expression?

  Breakpoints in the function won't work.

  Try it on a simple function.

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  Harjit Singh

  • September 24, 2010 22:49

  I originally was sitting at a breakpoint and it didn't do anything. I then tried it with the CPU sitting in a loop and for "simple" functions it works.

  I can't get it to work on a function that has debug_fwrite() in it - based on your response of 4/22 above, I assume all debug_* functions won't work?

  My need is that after I've captured data on the robot, I want to ship it over to the PC and wanted to use this mechanism. Any suggestions?

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  Michael Johnson

  • September 25, 2010 08:14

  None of the debug_ functions work when called from the debugger - we should support this but it's easier said than done.

  You could use the JavaScript console to save the contents of a variable to a file when at a breakpoint

  d = TargetInterface.peekBytes(Debug.evaluate("&var"), Debug.evaluate("sizeof(var)"));

  TargetInterface.writeBinary("c:/tmp/var.bin", d);

   

  Regards

  Michael

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