[Sensor] Fail to get the x,y,z value and catch errors sometimes

[xiaolongx]

Running Accelerometer.js and Gyroscope.js after 1-2 seconds, catch errors in serial log.

Error logs:

x=0.53037 y=0.953175 z=0.07454999999999999
[ERROR] /home/xiaolong/00_xiaolong/ZJS/ww47-1/zephyr.js/src/zjs_callbacks.c:341 zjs_signal_callback(): error putting into ring buffer, ret=4294967174
rotation (rad/s):  x=0.669885 y=0.410025 z=0.09[ERROR] /home/xiaolong/00_xiaolong/ZJS/ww47-1/zephyr.js/src/zjs_callbacks.c:341 zjs_signal_callback(): error putting into ring buffer, ret=4294967174
ephyr.js/src/zjs_rotation (rad/s):  x=0.531[ERROR] /home/xiaolong/00_xiaolong/ZJS/ww47-1/zephyr.js/src/zjs_callbacks.c:341 zjs_signal_callback(): error putting into ring buffer, ret=4294967174
xiaolong/ZJS/ww47-1/zephyr.js/src/zjs[ERROR] /home/xiaolong/00_xiaolong/ZJS/ww47-1/zephyr.js/src/zjs_callbacks.c:341 zjs_signal_callback(): error putting into ring buffer, ret=4294967174
rotati[ERROR] /home/xiaolong/00_xiaolong/ZJS/ww47-1/zephyr.js/src/zjs_callbacks.c:341 zjs_signal_callback(): error putting into ring buffer, ret=4294967174

Branch	Build ID	Date	Result
master	870d928	Nov 15, 2016	FAIL

[jimmy-huang]

yeah, this was a due to the ring buffer filling up too fast due to the event firing rapidly, so events gets dropped, it's a known issue, but it wasn't printing before now it's printing. I have a new patch to use trigger mode to set the sampling frequency to a slower value to 50Hz which will eliminate this isse, re-test after #453 is merged.

[xiaolongx]

Retest on arduino 101 with commit 2a9bbc7(#453 is merged), fail to get the x,y,z value
Error logs:

Accelerometer test...
ipm_console0: 'Sensor core running ZJS ARC support image'
state: activating
state: activated

Gyroscope test...
ipm_console0: 'Sensor core running ZJS ARC support image'
state: activating
state: activated

[jimmy-huang]

#483 should fix x,y,z not updated issue.

[xiaolongx]

QA cannot reproduce this issue after #483 is merged

[grgustaf]

Closing based on QA verification.