zephyr

History

Anas Nashif 10bb38c186 Use SoC instead of platform. Change terminology and use SoC instead of platform. An SoC provides features and default configurations available with an SoC. A board implements the SoC and adds more features and IP block specific to the board to extend the SoC functionality such as sensors and debugging features. Change-Id: I15e8d78a6d4ecd5cfb3bc25ced9ba77e5ea1122f Signed-off-by: Anas Nashif <anas.nashif@intel.com>		2016-02-05 20:25:11 -05:00
..
src	Use SoC instead of platform.	2016-02-05 20:25:11 -05:00
Makefile	Use BOARD instead of PLATFORM_CONFIG	2016-02-05 20:25:11 -05:00
README.txt	Update Title in sample project README.txt files	2016-02-05 20:15:21 -05:00
prj.mdef	Rename VPF files to use MDEF file extension	2016-02-05 20:14:15 -05:00
prj_arm.conf	samples: remove explicit enabling of SW_ISR_TABLE/DYNAMIC	2016-02-05 20:13:45 -05:00
prj_x86.conf	CONFIG_DRV_RANDOM is obsolete	2016-02-05 20:15:35 -05:00
testcase.ini	Use SoC instead of platform.	2016-02-05 20:25:11 -05:00

README.txt

Title: Tickless Idle Support

Description:

This test verifies the timing accuracy of the tickless idle feature.

The test first calibrates itself by repeatedly sleeping for 10 ticks with the
tickless idle feature disabled.  It then repeats this process with the tickless
idle feature enabled.  Lastly, it compares the average measured duration of
each approach and displays the result.  The tick timing is correct if the
'diff ticks' with tickless enabled matches the SLEEP_TICKS (10) setting in
the source.

The demonstration utilizes microkernel mutex APIs, timers and tickless
idle mode.

--------------------------------------------------------------------------------

Building and Running Project:

This microkernel project outputs to the console.  It can be built and executed
on QEMU as follows:

    make qemu

--------------------------------------------------------------------------------

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:

Tickless Idle Test
Calibrating TSC...
Calibrated time stamp period = 0x00000000163adc3a
Do the real test with tickless enabled
Going idle for 10 ticks...
start ticks     : 343
end   ticks     : 353
diff  ticks     : 10
diff  time stamp: 0x0000000018a69898
Cal   time stamp: 0x00000000163adc3a
variance in time stamp diff: 10 percent
===================================================================
PROJECT EXECUTION SUCCESSFUL