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What is the difference between arm4 and arm5_no_packs examples in the NRF5 SDK

Hi,

Within each example in the NRF5 SDK there are a number of folders including

  • arm4
  • arm5_no_packs
  • armgcc
  • config
  • iar

I'm having trouble finding an explanation on the differences between arm4 and arm5_no_packs, can someone please explain this to me? Both seem to open in uVision.

I assume the IAR folders contain project files for those developing in  IAR Embedded Workbench. Is this assumption correct?

Further more what folders do i use if i want to use Seggers "Embedded Studio for ARM" as my development environment? Based on this article the latest SDK should contain examples for Segger Embedded studio. I am using NRF5_SDK_12.3.0

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