Softdevice halts at location 0x000008C4

[DonalHE]

Hi There,

We have an issue where our project crashes, but the app_error_fault_handler() callback is not being called to help identify the cause of the issue. We are using the following version of the Softdevice: s132_nrf52_3.0.0_softdevice.hex

Without the debugger connected, the crash results in the application rebooting, but with the debugger attached it will halt at flash location 0x000008C4, which is within the softdevice.

We've also added the following additional fault handlers, but they are not catching the issue:

• HardFault_Handler
• MemManage_Handler
• BusFault_Handler
• UsageFault_Handler

Any suggestions on how to further debug this issue?

Cheers, Donal

[FormerMember]

The debugger halt at flash location 0x000008C4 indicates a hardfault in MBR, which indicates that there it may have been a problem when reading the RAM, resulting in a BusFault.

It is possible that there can be a problem related to booting of the application, do you use the correct start-up files?

Remember that the RAM address 0x20000000 is reserved, also when the softdevice is not in use.

[FormerMember]

When the application crashes at location 0x000008C4 during normal operation, does the hardfault registers provide any useful information? (This link can be useful for hardfault debugging.)