Cortex M4 hard fault finding root cause on LPC4078 pc=0x0

Hi everyone,

I'm getting a hard fault at my LPC4078 on LPCXpresso and would be very glad if you could help me finding the root cause.

The µC runs with freeRtos 8.2.2 but I'm not sure if the hard fault has ever anything to do with it.

When the hard fault occurs it hangs on this position:

The register values are:

r0 volatile uint32_t 0x1 (Hex)
r1 volatile uint32_t 0x300 (Hex)
r2 volatile uint32_t 0x0 (Hex)
r3 volatile uint32_t 0x10008a90 (Hex)
r12 volatile uint32_t 0x0 (Hex)
lr volatile uint32_t 0x12f89 (Hex)
pc volatile uint32_t 0x0 (Hex)
psr volatile uint32_t 0x0 (Hex)
SCB SCB_Type * 0xe000ed00
CPUID const volatile uint32_t 0x410fc241 (Hex)
ICSR volatile uint32_t 0x429803 (Hex)
VTOR volatile uint32_t 0x8000 (Hex)
AIRCR volatile uint32_t 0xfa050000 (Hex)
SCR volatile uint32_t 0x0 (Hex)
CCR volatile uint32_t 0x200 (Hex)
SHP volatile uint8_t [12] 0xe000ed18 (Hex)
SHCSR volatile uint32_t 0x0 (Hex)
CFSR volatile uint32_t 0x20000 (Hex)
HFSR volatile uint32_t 0x40000000 (Hex)
DFSR volatile uint32_t 0x0 (Hex)
MMFAR volatile uint32_t 0xe000edf8 (Hex)
BFAR volatile uint32_t 0xe000edf8 (Hex)
AFSR volatile uint32_t 0x0 (Hex)
PFR const volatile uint32_t [2] 0xe000ed40 (Hex)
PFR[0] const volatile uint32_t 48
PFR[1] const volatile uint32_t 512
DFR const volatile uint32_t 0x100000 (Hex)
ADR const volatile uint32_t 0x0 (Hex)
MMFR const volatile uint32_t [4] 0xe000ed50 (Hex)
MMFR[0] const volatile uint32_t 1048624
MMFR[1] const volatile uint32_t 0
MMFR[2] const volatile uint32_t 16777216
MMFR[3] const volatile uint32_t 0
ISAR const volatile uint32_t [5] 0xe000ed60 (Hex)
ISAR[0] const volatile uint32_t 17830160
ISAR[1] const volatile uint32_t 34676736
ISAR[2] const volatile uint32_t 555950641
ISAR[3] const volatile uint32_t 17895729
ISAR[4] const volatile uint32_t 19988786
RESERVED0 uint32_t [5] 0xe000ed74 (Hex)
RESERVED0[0] uint32_t 0
RESERVED0[1] uint32_t 0
RESERVED0[2] uint32_t 0
RESERVED0[3] uint32_t 0
RESERVED0[4] uint32_t 0
CPACR volatile uint32_t 0xf00000 (Hex)

Unfortunately pc is 0x0. That helped me a lot at similar hard fault failures.

How would you proceed finding the cause? Are there any information missing or should I check any other values?

I already searched in Google but until now I didn't find anything useful or it seemed to be too complex.

I'm looking forward hearing from you for any hints or tips.

Best regards,

Daniel

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