Forcing a Software Reset

v_dave — Fri, 12 Jun 2009 00:39:47 GMT

Hello All,

I have searched the Forum but I don't see an answer to my particular situation so I am hoping someone out there has done something similar.

Processor - 56F8323

Codewarrior Version - DSC56800/E 8.1.1a

I use a section of the Data FLASH to store some configuration data. What I am trying to do is to implement a Factory Reset where this data is erased and then I need to restart the code so that way the Firmware will think it was just powered up for the first time after assembly.

I can erase the FLASH but my issue is with how to restart from address 0x0000.

1) I turned on the Watch dog and the plan was to just sit in a loop until the Dog caused a reset after I erase the FLASH. The problem I am having is the Dog seems to reset the code everytime I break in Debug mode. I know the datasheet specifically says the Dog's timer stops running when halted in debug but for some reason it is still running and I am getting a reset.

2) With the Watchdog not doing what I want then my next attempt at a solution is to erase the FLASH then execute a reset command. I have not found any kind of method to perform a Software reset. I looked for an ASM opcode, a Reset Macro or function but I am just not seeing anything.

So my question is - Can someone point me to some good information on how to fix the Watchdog when in Debug mode OR can someone point me to a good software reset method?

Thanks in advance.

Re: Forcing a Software Reset

v_dave — Thu, 29 Oct 2020 09:41:01 GMT

OK, I found a simple solution and it works just fine for my application:

   Data_IFsh1_EraseSector(FLASH_Init);   asm(jmp 0x00);

Just erase the FLASH sector then jump to address 0x000. It was just a little to simple for me to see at first.

If anyone has a better way I would be glad to hear it.

topic Forcing a Software Reset in Classic/Legacy CodeWarrior

Forcing a Software Reset

Re: Forcing a Software Reset