Hi,
I have a TWR-LS1021a Eva Board, and I want to enable the watchdog so when kernel has a panic it will trigger system to reset.
Everything is set up correctly now, but I want to purposely damage the first filesystem and trigger the watchdog timer to throw exception so that the system can automatically reboot after the watchdog timer expires.
I was doing something in the uboot:
=> mm.b 0x2ad0000
02ad0000: 00 ?
02ad0001: 30 ?
according to the date sheet 1021ARM let's assume I want to set the time to 8 seconds so
02ad0000: 00 ? ---------------------------------> 0000 1111 --------->0x0f
since 0x00 is 0.5 seconds
.
.
so 0x 0f is 8 seconds
then enable the watch dog timer by setting up bit 13 to 1 which is
02ad0001: 30 ? -----------------------------------> 0000 0100 ------->0x04
not sure if the value I gave is correct. But after I set up the values the system reboots immediately and after reboot the device the values go back to default:
02ad0000: 00 ?
02ad0001: 30 ?
When I checked the QorIQ LS1021a reference manual the watdog section it says:
========================================================
Once the WDOG is activated, it must be serviced by the
software on a periodic basis. If servicing does not take place, the timer times out. Upon
timeout, the WDOG asserts the timeout signal (wdog_rst_b) as reset request to COP.
=========================================================
Does that mean I need to set the Watchdog Service Register as well?
Please help any instructions will be grateful.
