MSP430FR6972 watchdog cannot restart the program

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MSP430FR6972 watchdog cannot restart the program [Copy link]

Use WDTCTL = WDT_ARST_1000; to set the watchdog. In the main loop, WDTCTL = WDT_ARST_1000; feeds the watchdog, and the program works normally;

When the main loop feeding is removed, the program dies and does not restart. The WDTCTL clock source changes from ACLK to the default SMCLK. I don't understand why it does not restart.

qwerghf

This cannot be done. WDT_ARST_1000 uses ACLK as the watchdog clock.

qwerghf

If you use another clock as the watchdog clock, just select the corresponding function. It is clearly written in the header file.

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qwerghf posted on 2018-5-29 17:12 This cannot be done. WDT_ARST_1000 uses ACLK as the watchdog clock

Now I use WDTCTL = WDT_ARST_1000; and select ALCK as the watchdog clock. If I don’t feed the watchdog, the time is up and the system freezes, and the program cannot be restarted. In addition, the clock source has also been changed. I don’t know what caused this change. Feeding the watchdog with WDTCTL = WDT_ARST_1000; can clear the count, while ensuring that the watchdog clock source remains unchanged; this way the program can run normally

qwerghf

Let go of that chicken leg posted on 2018-5-29 18:19 Now I use WDTCTL = WDT_ARST_1000; select ALCK as the watchdog clock, don't feed the dog, time out, freeze, the program can't restart; another...

Can you see where it freezes during debugging? The clock source should be reset when it changes. You can add serial port printing to see if the program is reset and where it freezes