Exclude variable from initialization

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    • Exclude variable from initialization

      I have a couple of variables in my program that need to survive a reset. Thus, I did:

      C Source Code

      1. volatile uint32_t _px __attribute((section (".non_init")));
      In flash_placement.xml, I added the section:

      XML Source Code

      1. <ProgramSection alignment="4" load="No" name=".non_init" />
      I am using the GNU linker.

      However, the variable seems to be zeroed at startup. I can find the .non_init section in the map file and it contains my variable.

      How can I solve this?
    • Hello,

      Thank you from your inquiry.
      The use of the section here appears to be correct. So it should be working.
      You should have the file thumb_crt0.s in your project. Here you can verify which sections are zeroed at startup and which are not.
      Is non_init zeroed here as well?

      Best regards,
      Nino
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