topic Watchdog disable in i.MX Processors

Watchdog disable

shamiksaha — Fri, 22 Jan 2016 12:31:06 GMT

Hi guys,

As a mistake while blowing the fuses in U-Boot, I set the watchdog enable fuse as well, now every 90 seconds my board gets reset. Can the watchdog be disabled by software in uboot after setting the fuse??

Please help.....

Re: Watchdog disable

Yuri — Mon, 25 Jan 2016 07:00:48 GMT

Hello,

According to Watchdog Control Register (WDOGx_WCR) description

the WDZST, WDBG, WDW, WDE, WDT bits are write-once only bits.
Once the software does a write access to these bits, they will be locked

and cannot be reprogrammed until the next system reset assertion.

Have a great day,
Yuri

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Re: Watchdog disable

shamiksaha — Fri, 12 Feb 2016 02:39:20 GMT

Thanks for your reply Yuri,

I found the solution. In the System Reset Control register (SRC_SCR) at address 0x20d8000 there is a watchdog mask bit. On setting this bit i'm able to avoid the constant resetting, however due to this software rest is disabled and I have to manually reset the board everytime.

regards,

Shamik