Ultra-Low Power Mode
It is common to reduce the power consumed by the processor by using the idle Task hook to place the processor into a low power state. The power saving that can be achieved by this simple method varies depending on CPU utilisation but is limited by the necessity to periodically exit and then re-enter the low power state to process RTOS tick interrupts.
Alternatively, when supported by the processor, SAFERTOS can be purchased supporting a tickless Ultra-Low Power Mode. Here power is saved by completely stopping the RTOS tick interrupt during idle periods and placing the system in a power saving mode. Stopping the tick interrupt allows the processor to remain in a deep power saving mode longer until either an interrupt occurs, or it is time for the RTOS to re-activate a Task.
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