* Added mechanism enabling CPU to
enter WFI mode when the OS is
in idle, what results in large
power consumption reduction.
* Added mechanism to switch SDRAM to
self-refresh mode before entering
WFI, what resulted in further power
consumption reduction.
- Sentinel locks the frequency when pressing buttons and the encoder.
- The "user activity" sentinel will be properly managed by the system
(CpuGovernor) just like other sentinels.
- Adding information about active sentinels in the power management
statistics logs
Gets data from freertos and prints on frequency change depending
if it's important. Gathering is not costly, printing is though.
For less intrusive checks I would rather disable names gathering
as in worst case scenario it hangs rtos context switching till
thread id is found.
Improve structure of the module sys. Problems within this module
prevents from linking others.
Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>
