Difference between revisions of "AXIOM Beta/Temperatures"
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printf "%-14.14s\t%8.4f °C\n" "Temp" $ZT | printf "%-14.14s\t%8.4f °C\n" "Temp" $ZT | ||
</pre> | </pre> | ||
==Power Board== | |||
The AXIOM [[Beta Power Board]] contains a dedicated LM75 digital thermometer ([https://datasheets.maximintegrated.com/en/ds/LM75.pdf datasheet]) which can be read with the following command: | |||
<pre style="white-space: pre-wrap"> | |||
cat /sys/class/hwmon/hwmon0/temp1_input | |||
</pre> | |||
The output divided by 1000 is provided in °C. | |||
Revision as of 15:07, 19 July 2020
1 Different Temperature Sensors
The AXIOM Beta hardware contains several temperature sensors (some dedicated sensors some integrated in other chips) the different chips and components are also operating at different temperature ranges. The Zynq for example has a rather hot operation range but the image sensor is meant to be as cold as possible meaning just a few degrees above room temperature. This page is a collection of information related to reading the different temperatures throughout the hardware.
1.1 MicroZed™ Zynq 7020
The Zynq 7020 has a maximum operating temperature of 85°C and has a special heat sink attached.
The temperature can be read with the axiom-zynq-info.sh script (AXIOM Beta Firmware Version 2.0) which contains the following code lines:
ZTO=`cat /sys/devices/soc0/amba/*.adc/iio*/in_temp0_offset`
ZTR=`cat /sys/devices/soc0/amba/*.adc/iio*/in_temp0_raw`
ZTS=`cat /sys/devices/soc0/amba/*.adc/iio*/in_temp0_scale`
ZT=`dc -e "5k $ZTR ${ZTO/-/_} + $ZTS * 1000 / p"`
printf "%-14.14s\t%8.4f °C\n" "Temp" $ZT
1.2 Power Board
The AXIOM Beta Power Board contains a dedicated LM75 digital thermometer (datasheet) which can be read with the following command:
cat /sys/class/hwmon/hwmon0/temp1_input
The output divided by 1000 is provided in °C.