structure - unaligned memory? hard fault

mjg8t — Fri, 16 Jun 2017 22:32:20 GMT

Hi There,

I think I may be having an unalignment memory hard fault occurring. I am using some code which has run fine on the KL devices, but is giving the K22 a hard fault. I have narrowed down the issue to writing to a structure variable.

I have been happily naive about memory alignment and it appears it is time to learn more details about it in fixing my issue here. I have attached the project which is running on the frdm-k22f board. The main loop has a write to the structure and which seems to be casuing the issue.

Can someone explain what is wrong with the structure defenition? How I can avoid this in the future? And how to fix it?

Thanks!

Original Attachment has been moved to: test_sd.zip

Re: structure - unaligned memory? hard fault

jingpan — Mon, 19 Jun 2017 07:54:42 GMT

Hi,

I read you code and found that pdev is a pointer. But I didn't see you initializing it. A pointer must point to a entity before you use it.

Regards

Re: structure - unaligned memory? hard fault

mjg8t — Wed, 21 Jun 2017 17:04:13 GMT

Thank you for having a look! Very glad it was a something so simple.

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structure - unaligned memory? hard fault

Re: structure - unaligned memory? hard fault

Re: structure - unaligned memory? hard fault