Title: Power management demo
Description:
A sample implementation of a power manager app that uses the zephyr
power management infrastructure.
This app will cycle through the various power schemes at every call
to _sys_soc_suspend() hook function.
It will cycle through following states
1. CPU Low Power State
2. Deep Sleep - demonstrates invoking suspend/resume handlers of devices to
save device states and switching to deep sleep state.
4. No-op - no operation and letting kernel do its idle
This application uses Intel Quark SE Microcontroller C1000 board for
the demo.
When started, the app waits for a toggle of GPIO pin 16. GPIO Pin 16 is
DIO 8 in arduino_101 and DIO 4 in quark_se_c1000_devboard.
Toggle the GPIO pin in the following sequence:-
1) Start connected to GND during power on or reset.
2) Disconnect from GND and connect to 3.3V
3) Disconnect from 3.3V. Test should start now.
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Building and Running Project:
make BOARD=<board>
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Troubleshooting:
Problems caused by out-dated project information can be addressed by
issuing one of the following commands then rebuilding the project:
make clean # discard results of previous builds
# but keep existing configuration info
or
make pristine # discard results of previous builds
# and restore pre-defined configuration info
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Sample Output:
Power Management Demo
Toggle gpio pin 16 to start test
PM demo started
Low power state entry!
Low power state exit!
Total Elapsed From Suspend To Resume = 163869 RTC Cycles
Deep sleep entry!
Wake from Deep Sleep!
Deep sleep exit!
Total Elapsed From Suspend To Resume = 163986 RTC Cycles
Deep Sleep wake up event handler
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