i.MX RT1166 SysTick Interrupt Issue

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Patrick Conway

• August 05, 2022 13:35

i.MX RT1166 SysTick Interrupt Issue

We have been observing an issue when running code on i.MX RT1166 (CM7 core) where the SysTick interrupt does not appear to fire or is masked out. However, it is unclear why this is the case.

From some research online, it is mentioned that the Debug Halting Control and Status Register (DHCSR) has the ability to mask interrupts including the SysTick. However, I can't see a means of accessing this within CrossStudio to check its behaviour, or indeed see any settings which might be used to alter this behaviour within the GUI.

Is the DHCSR something which CrossStudio would normally interact with anyway? And how would we be able to check its value? (if we can) Or could you suggest other avenues of investigation for this SysTick interrupt issue?

Many thanks!

 

Kind regards,

Patrick Conway,

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  Markus

  • August 05, 2022 14:50

  Hello Patrick,

  you can check the value of the register via debugger. It is memory-mapped:

  

  iMXRT1166 is currently not supported by the Crossworks CPU-Support Package, how do you have created a project for iMXRT1166?

  Regards

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  Patrick Conway

  • August 05, 2022 14:55

  Hi Markus,

  Thanks for the response, I had tried checking the register value directly at its address value as you've indicated, however this is reported as "restricted memory range" within CrossStudio.

  We have been using a third-party CPU support package where iMX support was added; as I understand it the Crossworks "official" package will include iMX support at some point.

  Kind regards,

  Patrick

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  Markus

  • August 05, 2022 15:06

  Hello Patrick,

   

  have you tried to read the register via your application to a local variable?

  Which third-party CPU support package do you have used?

  Regards

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