No Flash Operation After Power-Up

Andy_B — Tue, 13 Dec 2022 21:05:06 GMT

I am using a PEmicro Multilink to develop and flash code into my target board with IAR Embedded Workbench. This works fine when the debugger is connected, and I get a UART prompt and some flashing LEDs (to let me know the firmware is running).

If I remove the debugger and cycle power the code does not appear to work: no UART prompt and no flashing LEDs.

When flashing I get the warning below, so I assume that I've got something improperly set in either my linker command file or project settings. Most of the code I'm using, at least for start-up, is from NXP's RTD (version 4.4.2.0.0) for the processor I'm using.

Any insight into how to resolve this would be appreciated. Thank you in advance.

Re: No Flash Operation After Power-Up

Robin_Shen — Wed, 14 Dec 2022 03:32:02 GMT

Hi Andy_B,

Looks more related to IAR, please contact IAR's technical support. I'm not familiar with the use of IAR, but maybe you can refer to this: https://www.iar.com/knowledge/support/technical-notes/general/creating-a-bootloader-for-cortex-m/
Also, have you tried the 'Attach to Running Target' feature to see where the program goes wrong?

Best Regards,
Robin
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topic No Flash Operation After Power-Up in S32K

No Flash Operation After Power-Up

Re: No Flash Operation After Power-Up