嵌入式开发板高低温试验的小技巧

在开发板做高低温试验的时候，我习惯与编写一个显示温度的脚本，随时观看，这样可以方便的观察到系统是否重新启动，是否超出温度限制，脚本如下：

#!/bin/bash
while true
do
echo "`date +%T`  current temperaturei= `cat /sys/class/thermal/thermal_zone0/temp` runtime = `cat /proc/uptime`" | tee -a ./aa.txt 
sleep 10s
done

这样脚本会一致运行，在屏幕终端显示的同时，会将记录保存到aa.txt文件中。如下图

0:15:06  current temperaturei= 53000 runtime = 1013.97 992.96
00:15:07  current temperaturei= 53000 runtime = 1014.99 993.96
00:15:08  current temperaturei= 53000 runtime = 1016.02 994.96
00:15:09  current temperaturei= 53000 runtime = 1017.04 995.96
00:15:10  current temperaturei= 53000 runtime = 1018.06 996.96
00:15:11  current temperaturei= 53000 runtime = 1019.08 997.96
00:15:12  current temperaturei= 53000 runtime = 1020.11 998.96
00:15:13  current temperaturei= 53000 runtime = 1021.13 999.96
00:15:14  current temperaturei= 53000 runtime = 1022.15 1000.96
00:15:15  current temperaturei= 53000 runtime = 1023.17 1001.96
00:15:16  current temperaturei= 53000 runtime = 1024.20 1002.95
00:15:18  current temperaturei= 53000 runtime = 1025.22 1003.95
00:15:19  current temperaturei= 53000 runtime = 1026.24 1004.95
00:15:20  current temperaturei= 53000 runtime = 1027.26 1005.95
00:15:21  current temperaturei= 53000 runtime = 1028.29 1006.95
00:15:22  current temperaturei= 53000 runtime = 1029.31 1007.95
00:15:23  current temperaturei= 53000 runtime = 1030.33 1008.95
00:15:24  current temperaturei= 53000 runtime = 1031.36 1009.94
00:15:25  current temperaturei= 53000 runtime = 1032.39 1010.93
00:15:26  current temperaturei= 53000 runtime = 1033.41 1011.93
00:15:27  current temperaturei= 103000 runtime = 1034.43 1012.93
00:15:28  current temperaturei= 53000 runtime = 1035.46 1013.93
00:15:29  current temperaturei= 53000 runtime = 1036.48 1014.93
00:15:30  current temperaturei= 53000 runtime = 1037.50 1015.93
00:15:31  current temperaturei= 53000 runtime = 1038.52 1016.93
00:15:32  current temperaturei= 53000 runtime = 1039.55 1017.93

诸如此类，另外我还需要查看最高温度和最低温度，用于数据统计，需要如何做呢，见下面的脚本

#!/bin/bash

# print the five word of every lines form aa 
array=($(cat aa.txt |awk '{print $4}'))
max=${array[0]}
min=${array[0]}
#echo "max= " $max "min= " $min
for v in "${array[@]}"
do
	if(( $v > ${max} ));then 
		max=$v
	fi
	if(( $v < ${min} ));then
		min=$v
	fi
done
echo "The Max value is " $max 
echo "The Min value is " $min

执行后如下图：

 当然最终的结果根据文件内容显示，怎么样，好用吧。