Which command to use to make a soft reset on K64F (KDS2 and KSDK110)?

[dafodil]

Hi,

I need to be able to reset by software my application that works on K64F.

Do you know a command ?

Bernard

[BlackNight]

Hi Bernard,

This is a generic way for ARM Cortex to perform a software reset:

void KIN1_SoftwareReset(void)
{
  /* generic way to request a reset from software for ARM Cortex */
  SCB_AIRCR = SCB_AIRCR_VECTKEY(0x5FA) | SCB_AIRCR_SYSRESETREQ_MASK;
  for(;;) {
    /* wait until reset */
  }
}

If you are using Processor Expert: that functionality/function is present in the 'KinetisTools' component:

available on SourceForge (see McuOnEclipse Releases on SourceForge | MCU on Eclipse).

Erich

[dafodil]

Hi Erich,

I got an error message, all macros are undeclared, where can I find the declaration? (my project is with KDSK110 and PE)

Bernard

[BlackNight]

Hi Bernard,

for the SDK, it is in core_cm4.h

and would be

SCB->AIRCR = (0x5FA<<SCB_AIRCR_VECTKEY_Pos)|SCB_AIRCR_SYSRESETREQ_Msk;

Erich

[BlackNight · Accepted solution]

And just in case: attached the KinetisTools component which can do this both for Kinetis SDK and non-SDK projects

void KIN1_SoftwareReset(void)
{
  /* Generic way to request a reset from software for ARM Cortex */
  /* See https://community.freescale.com/thread/99740
     To write to this register, you must write 0x5FA to the VECTKEY field, otherwise the processor ignores the write.
     SYSRESETREQ will cause a system reset asynchronously, so need to wait afterwards.
   */
#if KIN1_IS_USING_KINETIS_SDK
  SCB->AIRCR = (0x5FA<<SCB_AIRCR_VECTKEY_Pos)|SCB_AIRCR_SYSRESETREQ_Msk;
#else
  SCB_AIRCR = SCB_AIRCR_VECTKEY(0x5FA) | SCB_AIRCR_SYSRESETREQ_MASK;
#endif
  for(;;) {
    /* wait until reset */
  }
}

Erich

[dafodil]

Hi Erich,

It's not working, maybe it's because I use MQX with RTCS.  The app stop, but don't restart.

I found a solution with WDOG from KSDK and the WDOG_DRV_ResetSystem();

[BlackNight]

Not sure why this does not work with MQX. It works fine for me with the Kinetis SDK and FreeRTOS.

[dafodil]

In fact, the use of kinetis tools make some instability inside my project after adding ksdk component.

I will try again with the new KDS3!

For now, I reboot the app with timeout watchdog. It's not really the best solution, but it works.