what is the nature of imprecise data bus error?

David Chance

Hi all,

My program (on TM4C1294 platform) ran for many hours and got a hard fault, and NVIC_FAULT_STAT registered 0x400, or imprecise data bus error.

I tried to change my codes, such as increasing stack/heap size, in hope to fix this problem, but I still run into this hard fault a few times and every time I observe the same error code, I tried to track further down, but this happened on a section of codes (with the help of SP->PC to find it) that have been ran through many many times.

It is very time consuming to repeat this finding, so it will be helpful if I know the nature of this "imprecise data bus error". Can anyone give me the pointer?

Thanks alot!

over 9 years ago

0 cb1 over 9 years ago

Guru 47900 points

Might a visit to, "https://e2e.ti.com/support/microcontrollers/tiva_arm/f/908/t/258102" prove of some value? (it does target this vendor's MCU)

Poetic justice rises as, "Imprecise data bus error" hardly qualifies as anywhere near a, "precise" description.

The penchant for inadequate description defies comprehension - would not error xxx123 be equally "descriptive" - and raise NO (false) hopes of our understanding?

As (another) public service - here's Google's 1st page findings: i.e. "Everything you ever wanted to (really) know about "imprecise data bus errors."

0 David Chance over 9 years ago in reply to cb1

Genius 4760 points

Thanks for the suggestion

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what is the nature of imprecise data bus error?