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uint32 got copied wrong? (Bit error while debugging)

NewtoM

Hi,

I am struggling with I2S. While I was debugging my I2S data handler function, I found something interesting. I copy one element from a uint32 buffer into a (static volatile) uint32 variable and the values are not the same! Here is a screenshot:

image description

And here is the relevant disassembly:

image description

Can anyone explain?

Thanks,

NewtoM

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    what is p_data_received[sample] pointing to? is it connected to EasyDMA? First I though that this has to do something with the Thumb bit for ARM core but there is no branch instruction to that address, so its not about the thumb bit. Are your optimization level set to 0?

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    what is p_data_received[sample] pointing to? is it connected to EasyDMA? First I though that this has to do something with the Thumb bit for ARM core but there is no branch instruction to that address, so its not about the thumb bit. Are your optimization level set to 0?

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