nRF52832 reset and RESETREAS is 0x00000008(LOCKUP)

[jacksong]

Hi,DevZone

I'm not Native English , sometimes can not express exactly, So, I'll provide a concise description about  the question 

1, platform: nRF52832_QFAA _E1, nRF5_SDK_13.0

2, question: nRF52832 RESET(erratic and rare) and RESETREAS is 0x00000008(LOCKUP)

3, I have read some post at devzone 

https://devzone.nordicsemi.com/f/nordic-q-a/32894/what-does-cpu-lock-up-mean-and-how-should-i-debug-this-issue/126706#126706

and 

Cortex-M4 Lockup search result from google

4, my HardFualt _Handler code and WDT_Handler code:

void HardFault_Handler(void)
{
	/* Go to infinite loop when Hard Fault exception occurs */
	if (CoreDebug->DHCSR & 1)    //check C_DEBUGEN == 1 -> Debugger Connected
	{
		__breakpoint(0);  // halt program execution here
	}

	while (1)
	{
	}
}

void wdt_event_handler(void)
{
	/* Go to infinite loop when Hard Fault exception occurs */
	if (CoreDebug->DHCSR & 1)    //check C_DEBUGEN == 1 -> Debugger Connected
	{
		__breakpoint(0);  // halt program execution here
	}
	while (1)
	{
	}
}

Kenneth awneil @

Hope someone can point out what's happen and how to dig further

Thank You

[Turbo J]

jacksong said:

RESETREAS is 0x00000008(LOCKUP)

How do you know that?

I am asking because Segger RTT logging internally enables debug registers. Which means those breakpoint instruction will be executed, and directly trigger the Lockup (fault in Hard Fault condition).

[jacksong]

Hi,

In thsi case, the Reset was capture from daily use of product instead of simulation debug. I make a simple flash system on extern-SPI-flash, which can save RESETREAS and other necessary message as soon as chip reset. the LUCKUP shown to you is readback from flash.

[haakonsh]

I suggest you also log the cpu registers to flash in the hardfault handler.