HardFault debug

[Hansome]

During the firmware running, there will be a HardFault_Handler error occasionally.

Is there any way to locate the error source?

Is there any good way to catch the hardware exception? Thanks!

[AndreasF]

Hi.

Can you take a look at this page on StackOverflow?

Best regards,

Andreas

[Hansome]

Based on MDK5.25, nRF5_SDK_15.3.0_59ac345, and open DEBUG macro, and -O0

[AndreasF]

Hi, to quick summarize:

You have to find the stack pointer (SP) value at r13, as you can see that that is the location of the stack pointer in Cortex M4:

You then have to add 0x18 to the stack pointer value, and this will give you the program counter (PC) value that cause the error.

Best regards,

Andreas

[Hansome]

While setting APP_TIMER_CONFIG_IRQ_PRIORITY = 2, execute sd_ble_gap_conn_param_update will cause HardFault.
While setting APP_TIMER_CONFIG_IRQ_PRIORITY = 2, it is normal.
Why?

[Hansome]

APP_TIMER_CONFIG_IRQ_PRIORITY = 6 is normal