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#Adafruit trinket power consumption code
#Adafruit trinket power consumption series

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#Adafruit trinket power consumption series

Here are a few ways to post: a video on YouTub, a post on the CircuitPython forum, a blog post on your site, a series of Tweets, a Gist on GitHub. Just like past years (full summary 2019, 2020, and 2021), we’d like everyone in the CircuitPython community to contribute by posting their thoughts to some public place on the Internet. # include "nrf/timers.As 2022 starts, let’s take some time to share our goals for CircuitPython in 2022. Since the Raspberry Pi Foundation recommends a 5V/2.5A power supply, I’ll first try to get as close as possible as 2.5A, then I’ll go through tricks to reduce idle power consumption to less than 75 mA / 375 mW, and finally check the energy consumption under various CPU core count and frequency. # include "supervisor/shared/translate.h " The side effects will be that the usb background task will not run and that time.monotonic() and SysTick will not increment while sleeping.ĭoes all of this seem correct? Does my approach seem reasonable? My thought is to use a general purpose timer for tracking time while sleeping because there are unused timers that can be configured and run without interacting with any other code. The processor can go into some low power modes but not others while the timers are running. They are used for PulseOut, PWMOut, and internally for Bluetooth.

Timers: The general timers are configurable for different frequencies.

SysTick: Based on the processor clock cycles (very precise) and is used for general timing including time.sleep() and time.monotonic() and for controlling timeouts in various functions (e.g.

It runs even if the processor is in low power modes.

RTC: This is constantly running and is used for time.time().

From what I can tell, there are 3 types of timers in play:

#Adafruit trinket power consumption code

After spending some time looking through the code base, my plan is to make a module that has a function low_power_sleep() that will put the processor in a low power state until the time elapses.