The RP2040 clocking system is not ideal for power reduction. The sleep power is also potentially leaky on this version. I would use a decent size lithium battery with this or use external power management.
Microcontrollers like PIC or AVR have very low power consumption and can be used to shutdown the RP2040. However the RP2040 has a boot requirement which means this strategies on works for specific cases like infrequent boots. The point here is microprocessor management tricks independent of the central power management/governor system will still work here.
ARM core should be capable of some level of power management internally using specific instructions built into idle task. (Does RTOS support scheduler on both cores like this? Aka via NVIC.) This however will not likely reduce the overall power much. (Deep sleep really brings it down.) The problem with sleeping in RTOS is inversion. Generally speaking you need to prove everything is ready to come down.
Microcontrollers like PIC or AVR have very low power consumption and can be used to shutdown the RP2040. However the RP2040 has a boot requirement which means this strategies on works for specific cases like infrequent boots. The point here is microprocessor management tricks independent of the central power management/governor system will still work here.
ARM core should be capable of some level of power management internally using specific instructions built into idle task. (Does RTOS support scheduler on both cores like this? Aka via NVIC.) This however will not likely reduce the overall power much. (Deep sleep really brings it down.) The problem with sleeping in RTOS is inversion. Generally speaking you need to prove everything is ready to come down.
Statistics: Posted by dthacher — Sat Jun 15, 2024 6:46 am