Initializing large static array caused watch dog reset

bj Wang

Hello Guys

I am a newbie to msp430.

In my code i declared a large static array. It takes long time to initialize it in __data20_memzeor funtion, which caused watch dog reset.

I have to desable the watch dog in cstartup.asm file to make code run successfully. Is there any other way to solve the issue?

(Is it possible to put the array to DATA_N? How?)

Thanks in advance.

Charles

0 Mo. over 11 years ago

Hi Charles,

It seems that the Watchdog is triggered during the start-up code. Please have a look at this link: http://processors.wiki.ti.com/index.php/MSP430_FAQ#WDT_fires_during_C_startup_code

To prevent the Watchdog from firing during the C start-up you can add the following to a C source file (using CCS):

int _system_pre_init(void)
{
WDTCTL = WDTPW | WDTHOLD; // Stop watchdog timer
return 1;
}

In IAR, the function is called int __low_level_init(void).

Hope this helps.

BR,

Mo.

0 Leo Hendrawan over 11 years ago

Hi,

There are basically two options:

- disable watchdog in the C-pre init function

- make the compiler to skip the initialization of large array (using __no_init__ keyword)

0 bj Wang over 11 years ago in reply to Mo.

Hello Mo&Leo

Thanks you guys for quick reply. They are very helpful.

Charles

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