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Power management (Axel)

698 bytes added, 16:36, 10 October 2016
Measuring power consumption
Please note that OPP transactions may be prevented at all by manually configuring the governor in order to use a fixed OPP.
For more details please refer to [[Linux_and_interrupt_latency_(Axel) |this page]].
==Processor heating and lifetime==
==Measuring power consumption==
[[AxelEVB-Lite|AxelEVB]] integrates a chip (Texas Instruments INA226) that allows to measure the power consumption of the Axel SOM. This component - referenced as U25 - is very flexible. Following are the instructions to perform basic measurements. For more details please refer to its data sheet (http://wwwtested with the Linux kernel released with [[Axel_Embedded_Linux_Kit_(XELK)|XELK 2.ti3.com/product/INA2260]]).
TBDSOM power consumption measurements are available to be read from userspace via <code>sysfs</code> entries. Following are the entries for:* Voltage expressed in mV:<pre>root@axel-lite:~# cat /sys/class/hwmon/hwmon0/device/in0_input5root@axel-lite:~# cat /sys/class/hwmon/hwmon0/device/in1_input3286</pre>* Current expressed in mA:<pre>root@axel-lite:~# cat /sys/class/hwmon/hwmon0/device/curr1_input425</pre>* Power expressed in uW:<pre>root@axel-lite:~# cat /sys/class/hwmon/hwmon0/device/power1_input1500000</pre> INA225 - referenced as U25 on AxelEVB - is very flexible. For more details about possible please refer to its data sheet (http://www.ti.com/product/INA226).
==Useful links==
*[[FAQs_FAQs (Axel)|FAQs]]*[[Thermal management (Axel)]]*[[Power consumption (AxelLite)]]
==References==
{{reflist}}
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