Sub-second timeouts using ATmega4808 Mini Ultra

[David Witten]

I would like to use timeouts on the Mini Ultra (8bit) ATmega4808 that are less than 1 second. For example, 600 ms. I want to do this using the RocketScream_LowPowerAVRZero.h and RocketScream_RTCAVRZero.h for RTC standby sleep, and perhaps using deep sleep with the PIC.

No documentation or example convinces me that this is possible. But I find it hard to believe that it cannot be done.

Can anyone enlighten me?

Dave

[LIM PHANG MOH]

I have written the library with the smallest time base as 1 s as I believe that is what being used in most low power application (sleep->wake->sleep behaviour). But, if you want to go anything smaller than that, you will need to play with the pre-scaler somewhere along line #61 of the source code. The main reason I didn’t provide a smaller base time is, the maximum period it could support is too small rendering it useless for majority of the low power application (again like the above example).

[David Witten]

Thanks for the information!
I need to report a simple sensor (I2C) reading on 1 s interval boundaries. The data analysis people go nuts if they can’t have a a pretty exact 1 s cadence to work with across large numbers of samples.

Dave

[Author]

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