Since the hard fault is an exception interrupt, user can search code address from the memory address recorded by a stack pointer before entering a hardfault handler, and find the hard fault according to the address.

The steps are as follows:

Get a starting address of the stack pointer in Debug mode;
Enter the starting address to query stack of information in the memory;
The stacked 7^th address is the code address before entering an interrupt;
View the content of the code address in the program window, which is the state before entering the hard fault.

• Keil RVMDK:

• IAR EWARM:

Products:	Microcontrollers ,Arm Cortex-M0 MCUs ,M051 Base Series ,M0518 Series ,M0519 Series ,Mini51 Base Series ,Nano100/102 Base Series ,Nano110/112 LCD Series ,Nano120 USB Series ,Nano130 Advanced Series ,NUC029 Series ,NUC100/200 Advanced Series ,NUC120/122/123/220 USB Series ,NUC130/230 CAN Series ,NUC131/NUC1311 CAN Series ,NUC140/240 Connectivity Series ,Arm Cortex-M4 MCUs ,M451 Base Series ,M451M Series ,M452 USB Series ,M453 CAN Series ,NUC442/472 Series ,NUC505 Series
Applications:
Function:	Software and Tools,Development-Environment,IAR,Keil

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How does a user check the state before entering hard fault when a hard fault occurs on a M0/M4 microcontroller (MCU)? Issue Date：2015-10-16

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