432 wdt configuration

robert schaefer

Expert 2050 points

Other Parts Discussed in Thread: ENERGIA

Hi,

I am trying to configure the WDT based on the examples provided, wdt_interval_mode, and wdt_service_the_dog

The 432 examples don't change the core frequency, which I guess is 3Mhz.

I readjusted the core frequency to 48Mhz, and to no surprise, the timeout occurs too quickly.

I figured I would just increase the WDT_A_CLOCKITERATIONS_x value by 12, however, on referencing the source code I see that WDT_A_CLOCKITERATIONS_x is a coded value and not a count.

Rather than iteratively try the different and see what happens, does anyone here have a equation for converting code to seconds timeout per core frequency?

These are the choices:

WDT_A_CLOCKITERATIONS_512K -> the wdt example.

WDT_A_CLOCKITERATIONS_8192K

WDT_A_CLOCKITERATIONS_128M

WDT_A_CLOCKITERATIONS_2G

over 9 years ago

0 Cameron LaFollette over 9 years ago

TI__Genius 14875 points

Robert,
I can't find the examples you are referencing, are these in Energia, DriverLib, or elsewhere?
Without seeing exactly what is happening, the equation should follow Iterations/Frequency. So 128M should timeout at 2.667 seconds at 48MHz.

Which clock do you mean by "changed the core frequency." Also, what clock is sourcing WDT?

0 robert schaefer over 9 years ago in reply to Cameron LaFollette

Expert 2050 points

Libraries->Driver Library -> MSO432P4xx -> Example Projects -> WDT_A

MAP_CS_setDCOCenteredFrequency(CS_DCO_FREQUENCY_48);

128M gives just under 3 seconds, thank you.

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432 wdt configuration