This looks like a hard one. Intermittently, like once a day, I’m getting this: CM4 FAULT!! SCB->CFSR = 0x00008200 Bus Fault! Fault address = 0x01000000 r0 = 0x00000000 r1 = 0xffffffff r2 = 0x08045a48 r3 = 0xfff783ef r12 = 0x100a875f lr = 0x100a9450 pc = 0x81010000 psr = 0x3e01ec70 The call stack …

It goes against my superstitions to say so, but it looks like the “Intermittent CM4 FAULT! Bus Fault!” problem that started this thread has been solved by setting #define configUSE_NEWLIB_REENTRANT 1 in FreeRTOSConfig.h. Dave’s page explains the reasons better than I can. I want to thank you all …

Intermittent CM4 FAULT! Bus Fault! in floating point app

Kernel

rashed (Rashed Talukder) Split this topic July 2, 2020, 6:47pm 44

3 posts were split to a new topic: Cortex M4 hard fault when using floating point unit

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ARM Cortex M7 fault exception and stack corruption Kernel debug	15	4026	July 4, 2023
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Intermittent CM4 FAULT! Bus Fault! in floating point app

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