Watchdog

Slacky

Hello.


How to find where the program freezes and reboot from watchdog?



Thanks.

Slacky

No solution?

TL_YB

Hi,
You can use register DEEP_ANA_REG10 to implement it.
The description of registers can refer to the pm.h header file.

1. /**
   
2. * @brief these analog register can store data in deepsleep mode or deepsleep with SRAM retention mode.
   
3. *               Reset these analog registers by watchdog, chip reset, RESET Pin, power cycle
   
4. */
   
5. #define DEEP_ANA_REG6                       0x35 //initial value =0x20
   
6. #define DEEP_ANA_REG7                       0x36 //initial value =0x00
   
7. #define DEEP_ANA_REG8                       0x37 //initial value =0x00
   
8. #define DEEP_ANA_REG9                       0x38 //initial value =0x00
   
9. #define DEEP_ANA_REG10                      0x39 //initial value =0xff

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Slacky

Hello.

How does this help us understand where the program crashed?

TL_YB

For example, when your system is running normally, you can write a value to register DEEP_ANA_REG10.

1. analog_write(DEEP_ANA_REG10, VALUE)

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When the system restarts, check if the expected value written in register DEEP_ANA_REG10 is correct.
If not, it indicates that the watchdog restart has been triggered.

Slacky

Hello.

Doesn't work without PM?

I write 0x65 to the register, but after reboot it always returns 0xFF.