LPC1768 Save hard fault context

yakoinfinity — Tue, 03 Oct 2017 20:55:39 GMT

Hi folks!

I've been experiencing some troubles with an application on one client. For some reason, after some time of normal use, it locks up on a Hard fault and performs a watchdog reset (wich is the expected behaviour). It occurs every hour, sometimes 2 or 3 times.
But, since we can not reproduce the fault, i've thinking in the possibility of make some post-mortem debugging in site.

There are a chance of saving the context (registers, PC) somewhere on the MCU, before it locks up and wait for watchdog reset?

Actually, i'm using default fault handlers, CMSIS Drivers and CoOs. MCU is LPC1768.

Any help will be welcome.

Regards,

Exequiel.

Re: LPC1768 Save hard fault context

carstengroen — Wed, 04 Oct 2017 06:38:29 GMT

Exequiel,

some good info can be found in Keil's appnote here: http://www.keil.com/appnotes/files/apnt209.pdf

and here: Debugging a Cortex-M0 Hard Fault - Discussions - Embedded - Arm Community

Hope this helps...

topic LPC1768 Save hard fault context in LPC Microcontrollers

LPC1768 Save hard fault context

Re: LPC1768 Save hard fault context