verify_ad9361_temp

#!/bin/sh

for i in $(find -L /sys/bus/iio/devices -maxdepth 2 -name name)
do
  dev_name=$(cat $i)
  if [ "$dev_name" = "ad9361-phy" ] ; then
    ad9361=$(echo $i | sed 's:/name$::')
    break
  fi
done

if [ "x$ad9361" = "x" ] ; then
  echo can not find ad9361 in /sys
  exit
fi

cd $ad9361
bbpll=$(cat rx_path_rates | sed -e 's|^BBPLL:||' -e 's| .*$||')
device=$(echo $ad9361 | awk -F '/' '{print $NF}')
# determine the time for new temperatures to be added - can't get something faster than I should
if [ -d /sys/kernel/debug/iio/$device ] ; then
   echo 0x00D > /sys/kernel/debug/iio/$device/direct_reg_access
   len=$(printf "%d" `cat /sys/kernel/debug/iio/$device/direct_reg_access`)
else
   len=127
fi
# (2^29 + 10%) = 5905580032
len=$(expr '(' $len '/' 2 ')' '*' 5905580032 '/' $bbpll)
len=$(printf "%d.%d\n" `expr $len '/' 10`  `expr $len - '(' $len '/' 10 '*' 10 ')'`)

avg=$(cat in_temp0_input)
# tolerance of the temp sensor is +/- 3C
tolerance=3000
max=`expr $avg + $tolerance`
min=`expr $avg - $tolerance`
echo "found $ad9361, starting temp ${avg}, reading every $len seconds"
start=`date +%s`
last_err=-1
while [ 1 ]
do
   sleep $len
   temp=$(cat in_temp0_input)
#   echo checking $temp against $max and $min, avg  $avg
   if [ $temp -gt $max ] ; then
      if [ $last_err -ne $temp ] ; then
        last_err=$temp
        echo -n "read $temp, exceeds max of $max, avg = $avg "
        err=`date +%s`
	sec=`expr $err - $start`
	hrs=`expr $sec / 3600`
        min=`expr '(' $sec - '(' $hrs '*' 60 ')' ')' / 60`
        sec=`expr $sec % 60`
        printf "%d:%d:%02d elapsed\n" $hrs $min $sec
     fi
   else
     if [ $temp -lt $min ] ; then
       if [ $last_err -ne $temp ] ; then
         last_err=$temp
         echo -n "read $temp, under min of $min, avg = $avg "
         err=`date +%s`
	 sec=`expr $err - $start`
	 hrs=`expr $sec / 3600`
         min=`expr '(' $sec - '(' $hrs '*' 60 ')' ')' / 60`
         sec=`expr $sec % 60`
         printf "%d:%d:%02d elapsed\n" $hrs $min $sec
       fi
     else
       avg=`expr '('  $avg + $temp ')' / 2`
       max=`expr $avg + $tolerance`
       min=`expr $avg - $tolerance`
     fi
   fi
done