Keil Logo Arm Logo

Application Note 209

Using Cortex-M3 and Cortex-M4 Fault Exceptions

Cortex-M processors implement an efficient exception model that also traps illegal memory accesses and several incorrect program conditions. This application note describes the Cortex-M fault exceptions from a programmers point of view and explains the fault exceptions usage.

Revision

  • September 2016
    • Corrected: PRECISEERR to PRECISERR
    • Corrected: Register window picture on page 14
    • Adapted: Handling of hard faults from “Call Stack + Locals” window on page 13.
  • March 2016
    • Improved Fault Handlers for SHCSR from SHCSR |= 0x00007000 to
      SCB->SHCSR |= SCB_SHCSR_USGFAULTENA_Msk
                 |  SCB_SHCSR_BUSFAULTENA_Msk
                 |  SCB_SHCSR_MEMFAULTENA_Msk; // enable Usage-, Bus-, and MMU Fault
      
  • January 2016
    • SCB->SHP Registers: corrected parameters of NVIC_SetPriority()
    • SCB->SHCSR Register: corrected wrong SHCSR value 0x00070000 to 0x00007000
    • Implementing Fault Handlers: changed __breakpoint (0) to __BKPT (0)
    • Implementing Fault Handlers: corrected wrong SHCSR value 0x00070000 to 0x00007000
  • February 2015 - Exchanged figure 5.
  • June 2014 - Register misspellings corrected
  • November 2013 - Initial version
APNT209.PDF (650K)
Monday, September 19, 2016

Estimated File Download Time:
< 3 Minutes: 56Kb Modem
< 1 Minutes: 128Kb ISDN
< 10 Seconds: T1/Broadband

Keil logo

Arm logo
Important information

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies.

Change Settings

Privacy Policy Update

ARM’s Privacy Policy has been updated. By continuing to use our site, you consent to ARM’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers
of your data.

Acquisition of ARM Holdings plc. by SoftBank Group Corp.

We are pleased to inform you that on 5 September 2016, SoftBank Group Corp. acquired ARM Holdings Plc. ARM will continue to operate as an independent business within the SoftBank group.

Any current agreements between ARM Ltd (or other ARM group companies, as applicable) you / your company remain in effect as between the parties, and the parties will continue to be bound by and perform the obligations in such agreements. If you have any queries please direct these to ARMSoftbank-Notifications@arm.com.