ctl.h and undefined reference

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Baptiste Chinon

• April 03, 2011 10:56

Hi,

I want to build a project and I have some trouble with ctl.h ; initially I had the error "no such file or directory" when including ctl.h, so I added it in C:\Program Files\Rowley Associates Limited\CrossWorks for ARM 2.0\include

Then it was ok but now I have errors during linking process, like those ones (see attached file "without ctl.c") :

undefined reference to 'ctl_get_current_time'
undefined reference to 'ctl_timeout_wait'
undefined reference to 'ctl_tas_set_priority'

...

I added ctl.c in my project and as a consequence previous link errors was gone but I have others... (see attached file "with ctl.c")

Where I'm wrong ?

Thanks

Baptiste

without ctl.c.jpg
with ctl.c.jpg

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  Paul Curtis

  • April 04, 2011 16:33

  You should have created a CTL project to begin with and then all the libraries and the header file location would have been set up automatically.

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  Baptiste Chinon

  • April 04, 2011 21:18

  thanks, everything is fine now !

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  Daniel Abraham

  • April 05, 2011 05:09

  @ Baptiste: Am facing the same issue... how u got fix it, many thankz!!!

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  Baptiste Chinon

  • April 05, 2011 12:54

  I have created a new CrossWork Tasking Library project (known as CTL).

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  Sarah

  • December 30, 2015 14:33

  Hi,

   

  I am having the same problem, I do not have ctl.h in CrossWorks folder but I have ctl_api.h

  I created a project in CTL but What should I do then ?

   

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  Michael Johnson

  • December 30, 2015 15:31

  It should be in $(StudioDir)/ctl/include - the project should have

  $(StudioDir)/ctl/include
  $(StudioDir)/include
  $(PackagesDir)/include

  in the system include directories property.

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  Sarah

  • December 30, 2015 15:37

  I found it in ctl directory. Thank you

  I am trying to measure the time for a function execution. I tried the following:

  Using "'ctl_get_current_time'" but the linker gives me this error:

  undefined symbol '_ctl_get_current_time'?

  Also I tried to use the "time function" defined in time.h, but I am getting the same error:

  error: undefined symbol '_time'

  How can I get the time measurement in this case?

   

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  Michael Johnson

  • December 30, 2015 15:49

  You'll need to link in the ctl library - add $(StudioDir)/ctl/lib/libctl$(LibExt).hza to the linker | additional inputs property.

  If you just want to measure time then start a timer running and record the counter value on entry/exit to the function.

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  Sarah

  • December 30, 2015 20:02

  Can you give me example to do this please.

  In my program I am trying to do the following: (I am running it in the AVR simulator)

  start_time=ctl_get_current_time();

  \\do  a function

  return start_time - ctl_get_current_time();

   

  I am getting 0.

   

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  Michael Johnson

  • December 31, 2015 08:06

  Sorry there's no timer support in the simulator.

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  Sarah

  • December 31, 2015 17:12

  How can I convert the recorded counter value to millisconds. For example if TCNT1=1431, how much is it in milliseconds?

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  Michael Johnson

  • January 04, 2016 09:13

  I'd guess it will be the CPU clock frequency with possibly a divider for the timer. Have a read of the data sheet and use the registers window to see the default values.

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