topic Re: How to reset a processor from MQX? in MQX Software Solutions

How to reset a processor from MQX?

icheifot — Tue, 15 Feb 2011 07:27:26 GMT

Hi everyone

We are using twrk60n512+MQX 3.6.2

Can anyone point the way to reset the board from MQX?

Thanx in advance

Re: How to reset a processor from MQX?

boogy — Tue, 15 Feb 2011 21:58:38 GMT

I hope I'm not making a huge mistake by doing this, but it works.

__boot();

My starting task that calls all others first checks it's non-volatile ram for a correctly formatted firmware upgrade file and if it likes what it sees it upgrades a portion of my application then calls __boot();

So far so good.

Re: How to reset a processor from MQX?

icheifot — Thu, 17 Feb 2011 03:00:11 GMT

Thank you very much for your help

Your solution works, and i have created the support request with Freescale to confirm that calling __boot() function will not lead to problems.

I will post here when i hear from them

Cheers

Re: How to reset a processor from MQX?

CarlFST60L — Tue, 22 Feb 2011 06:38:14 GMT

I think this is the correct way to do it:

VMCF5225_STRUCT_PTR reg_ptr = (VMCF5225_STRUCT_PTR)BSP_IPSBAR;

reg_ptr->CCM.RCR |= MCF5225_CCM_RCR_SOFTRST;

Re: How to reset a processor from MQX?

icheifot — Wed, 23 Feb 2011 05:14:44 GMT

Thank you for the reply Carl

However this code is for the m52259 board and im working with the K60n512

Ill try to find the similar way to do it on Kinetis platform

Re: How to reset a processor from MQX?

boogy — Wed, 23 Feb 2011 23:07:31 GMT

I'm using MQX 3.6 along with CW7.2 and a MCF52259. I tried Carl's solution and ended up with unknown MCF5225_CCM_RCR_SOFTRST.

Where is this defined?

Re: How to reset a processor from MQX?

CarlFST60L — Thu, 29 Oct 2020 09:34:11 GMT

Hi,

Sorry, the complete code is this:

#define MCF5225_CCM_RCR_SOFTRST                 (1 << 7)void MCF52259_REBOOT(void){VMCF5225_STRUCT_PTR reg_ptr = (VMCF5225_STRUCT_PTR)BSP_IPSBAR; reg_ptr->CCM.RCR |= MCF5225_CCM_RCR_SOFTRST;}

icheifot, I meant to say "Maybe you can use a similar method that I use in MCF5225X"

Re: How to reset a processor from MQX?

boogy — Thu, 24 Feb 2011 23:01:03 GMT

Thanks Carl, you have solved an ancient mystery.

Re: How to reset a processor from MQX?

Briwallis — Thu, 29 Oct 2020 09:34:13 GMT

To answer this question, to do a soft reset on the Kinetis platform you need to set the SYSRESETREQ bit in the NVIC AIRCR register.

In the MK40X256VMD100 header file the register is SCB_AIRCR and you cannot just do a read modify write on this register because it has a vector key that must be written correctly and doesn't read the same. Here is a little snippet of code to reset the Kinetis:

   uint_32 read_value = SCB_AIRCR;   read_value &= ~SCB_AIRCR_VECTKEY_MASK;   read_value |= SCB_AIRCR_VECTKEY(0x05FA);   read_value |= SCB_AIRCR_SYSRESETREQ_MASK;      _int_disable();   SCB_AIRCR = read_value;   while(1);

Re: How to reset a processor from MQX?

DavidS — Wed, 20 Apr 2011 20:51:41 GMT

This topic was included on a post from 4-Mach-20011 that implemented the Kinetis software reset capability inside a watchdog routine as well.

https://community.freescale.com/message/79984#79984

Briwal..thanks for your code as well.

Regards,

David