WatchDog_B pin is not getting asserted

arunvarma — Thu, 27 Aug 2015 09:16:35 GMT

Hi,

I am using custom board based on SaberSD design (processor imx6dl).

Using Watchdog_1 for timeout and reset, IPU1_DISP0_DATA08 / IPU2_DISP0_DATA08 / PWM1_OUT / WDOG1_B / <GPIO4_IO29> in is connected to PMIC reset pin.

If SRS bit is cleared / watchdog time out happens OS get restarted, but WATCHDOG1_B is not asserted( so no power reset happens).

WCR is initialized to 0x779f.

Thanks and regards,

Arun

Re: WatchDog_B pin is not getting asserted

arunvarma — Fri, 28 Aug 2015 14:28:11 GMT

Hi all,

Issue is resolved

Reason for Issue:

Configured the MUx control of DISP0_DATA08 to WDOG1_B, but doesn't configured pad control registers.

WCR= 0x779F;

In above initialization WDA bit is cleared.

So WDOG1_B pin get asserted, once I Configured DISP0_DATA08 PAD and MUX control registers.

Fix:

Configure DISP0_DATA08 PAD and MUX control registers.

Set WDA bit to 1, so it behaves in system default mode.

WCR = 0x77BF;

After above fix WDOG1_B pin gets asserted whenever watch dog timeout happens or SRS bit is cleared.