FSTAT deposit writes 1 to clear FPVIOL and ACCERR,but the value is still 0

[ZEROOO]

When debugging Csec module with S32K118, example 1_Configure_part_and_Load_keys is used. FSTAT deposit writes 1 to clear FPVIOL and ACCERR. Why is it still 0 detected by debugger after writing.Did the register automatically clear to 0 after writing 1 in the initialization phase?

[danielmartynek]

Hi @ZEROOO,

I'm not sure if I understand the question.

But this is expected, the bits are W1C (Write 1 to clear), refers to a register bitfield that must be written as 1 to be "cleared."

Regards,

Daniel

[ZEROOO]

Hi

    This code is to write 1 to the FSTAT register ACCERR and FPVIOL fields, but the actual ic5000 debugging found that it did not write in, as shown below.

[danielmartynek · Accepted solution]

If the two flags were set, the W1C would clear the flags.

But since the flags are not set, the code does nothing.

The code does not suppose to set the flags.

BR, Daniel