| 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. |
| 3. No-op - no operation and letting kernel do its idle |
| |
| This application uses Intel Quark SE Microcontroller C1000 board for |
| the demo. It demonstrates power operations on the x86 and ARC cores in |
| the board. |
| -------------------------------------------------------------------------------- |
| |
| Building and Running Project: |
| |
| make BOARD=<board> |
| |
| -------------------------------------------------------------------------------- |
| |
| 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 |
| |
| -------------------------------------------------------------------------------- |
| |
| ***Sample output on x86 core*** |
| |
| Power Management Demo on x86 |
| |
| Application main thread |
| |
| Low power state entry! |
| |
| Low power state exit! |
| Total Elapsed From Suspend To Resume = 131073 RTC Cycles |
| Wake up event handler |
| |
| Application main thread |
| |
| Deep sleep entry! |
| Wake from Deep Sleep! |
| |
| Deep sleep exit! |
| Total Elapsed From Suspend To Resume = 291542 RTC Cycles |
| Wake up event handler |
| |
| Application main thread |
| |
| No PM operations done |
| |
| Application main thread |
| |
| Low power state entry! |
| |
| Low power state exit! |
| |
| ... |
| |
| ***Sample output on ARC core*** |
| |
| Power Management Demo on arc |
| |
| Application main thread |
| |
| Low power state entry! |
| |
| Low power state exit! |
| Total Elapsed From Suspend To Resume = 131073 RTC Cycles |
| Wake up event handler |
| |
| Application main thread |
| |
| No PM operations done |
| |
| Application main thread |
| |
| Low power state entry! |
| |
| Low power state exit! |
| |
| ... |
