MCF52254 Reset Hangs

salman83 — Thu, 03 Oct 2013 15:04:33 GMT

Hi,

I am trying to do software reset but everytime during the reset it is unable to boot. It looks like that it is hanged. Even if I do the hardware reset, still it does not respond. I have to power down the mcu and then power it up again.

I tried to do the reset using two ways: -

- Asserting Software Reset Bit

- Backup Watchdog Timer Expiration

Both of them do not work at all.

Here is code for each section: -

Software Reset

----------------------

MCF_RCM_RCR = MCF_RCM_RCR_SOFTRST | MCF_RCM_RCR_FRCRSTOUT;

Backup Watchdog Timer

------------------------------------

	MCF_CLOCK_BWCR = 0x00;
	MCF_BWT_WMR = 0xFFFF;
	MCF_BWT_WCR = MCF_BWT_WCR_EN;

while(1) { }

Thanks in advance for the help.

Regards.

Re: MCF52254 Reset Hangs

TomE — Thu, 03 Oct 2013 23:31:25 GMT

Type "mcf52259 soft reset" into the Search Field and see if any of the previous posts on this topic give a solution.

Here's someone who now has soft reset working fine. There must be a difference between his hardware and yours:

Re: Software Reset For MCf52259

Here's one from 2011 stating that the M52259DEMO Board doesn't soft-reset, but the M52259EVB Board does work. Also that it doesn't work with the debugger connected.

Re: MCF52259: Software Reset hangs

That should be enough to get you working.

Tom

topic MCF52254 Reset Hangs in ColdFire/68K Microcontrollers and Processors

MCF52254 Reset Hangs

Re: MCF52254 Reset Hangs