Watchdog does not trigger reset on s32k

[zainali]

Hi,

I am trying to setup watchdog for s32k144. For that i am using sdk. The sequence to setup is watchdog is defined below:

• 
• WDOG_DRV_Init(INST_WATCHDOG, &watchdog0_Config0); // To initialize the watchodog in main.
• WDOG_DRV_Trigger(INST_WATCHDOG); // Trigger watchdog in main loop.

Now the problem is that if i comment "WDOG_DRV_Trigger(INST_WATCHDOG);" then the MCU does not restart. But if i do run code in debug mode and add breakpoint on "WDOG_DRV_Init" function then watchdog resets MCU.

Any idea what might be wrong with my configuration as my watchdog only perform reset when i am in debug mode plus i add breakpoint on "WDOG_DRV_Init".

Thanks

[zainali · Accepted solution]

The issue was due to optimization level. For above test i was using optimization of -Os. Once i switched to -O0, it would work every time.