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This version (09 Feb 2021 16:11) was approved by Robin Getz.The Previously approved version (10 Nov 2014 15:07) is available.Diff

Table of Contents

Shell Scripts for the FMC RF boards

Analog Devices uses six designations to inform our customers where a semiconductor product is in its life cycle. From emerging innovations to products which have been in production for twenty years, we understand that insight into life cycle status is important. Device life cycles are tracked on their individual product pages on analog.com, and should always be consulted before making any design decisions.

This particular articl/edocument/design has been retired or deprecated, which means it is no longer maintained or actively updated, even though the devices themselves may be Recommended for New Designs or in Production. This page is here for historical/reference purposes only.

Shell Scripts are scripts written for the shell (dash or bash or ash) of an operating system. To find out which shell, you are using, try something like:

This specifies any shell prompt running on the target 

rgetz@pinky ~ $ which sh
/usr/bin/sh
rgetz@pinky ~ $ ls -l /usr/bin/sh
lrwxrwxrwx 1 root root 9 2009-05-13 20:39 /usr/bin/sh -> /bin/bash

OR 

rgetz@pinky ~ $ ps -p $$
  PID TTY          TIME CMD
 1321 pts/0    00:00:00 bash

DDS passing by

#!/bin/sh
 
# find the DAC
for i in $(find /sys -name name)
do
  if [ "`cat $i`" = "cf-ad9122-core-lpc" ] ; then
     dac_path=$(echo $i | sed 's:/name$::')
  fi
done
 
#save the current settings
init=`cat $dac_path/out_altvoltage0_1A_frequency`
 
# Set DDSn_A
freq_A(){
  echo $1 > $dac_path/out_altvoltage0_1A_frequency
  echo $1 > $dac_path/out_altvoltage2_2A_frequency
}
 
# Set DDSn_B
freq_B(){
  echo $1 > $dac_path/out_altvoltage1_1B_frequency
  echo $1 > $dac_path/out_altvoltage3_2B_frequency
}
 
for i in 10 20 30 40 50 60 70 80 90 100 110
do 
  freq_A `expr $i \\* 1000000`
  freq_B `expr \( 120 - $i \) \\* 1000000`
  sleep 1
done
 
freq_A $init
freq_B $init

Random data on the RF output

#!/bin/sh
 
# buffer size, let's use 512 samples, or 1024 bytes
buffer_size=1024
 
# find the DAC
for i in $(find /sys -name name)
do
  if [ "`cat $i`" = "cf-ad9122-core-lpc" ] ; then
     dac_path=$(echo $i | sed 's:/name$::')
  fi
done
 
# Get the associated dev file
dev=/dev/$(echo $dac_path |  awk -F "/" '{print $NF}')
if [ ! -c $dev ] ; then
  echo "Can't find device $dev"
  exit
fi
 
# set the buffer size
echo $buffer_size > $dac_path/buffer/length
 
# generate the random data, and give it to the DAC
dd if=/dev/urandom of=$dev bs=$buffer_size count=1
 
#enable things
echo 1 > $dac_path/buffer/enable
 
#Wait 5 seconds
sleep 5
 
#turn if off before we bring down everyone's WiFi
echo 0 > $dac_path/buffer/enable

Setting the amplitude

I don't like remembering what 1/32 is, so I just use 1/(2^n). You just need to provide 'n'. 

#!/bin/sh
 
#check in the input
if [ $1 -le -1 ] ; then
  echo "input out of range, (needs to be 0-4)"
  exit
fi
 
if [ $1 -ge 5 ] ; then
  echo "input out of range (needs to be 0-4)"
  exit
fi
 
# find the DAC
for i in $(find /sys -name name 2>/dev/null)
do
  if [ "`cat $i`" = "cf-ad9122-core-lpc" ] ; then
     dac_path=$(echo $i | sed 's:/name$::')
  fi
done
 
echo $(echo "scale=4; 1 / ( 2 ^ $1 )" | bc) > $dac_path/out_altvoltage0_1A_scale
echo $(echo "scale=4; 1 / ( 2 ^ $1 )" | bc) > $dac_path/out_altvoltage1_1B_scale
echo $(echo "scale=4; 1 / ( 2 ^ $1 )" | bc) > $dac_path/out_altvoltage2_2A_scale
echo $(echo "scale=4; 1 / ( 2 ^ $1 )" | bc) > $dac_path/out_altvoltage3_2B_scale
 
echo -n "amplitude set to "
cat $dac_path/out_altvoltage0_1A_scale

Sweeping the Tx

#!/bin/bash
 
# find the TX LO generator
for i in $(find /sys -name name)
do
  if [ "`cat $i`" = "adf4351-tx-lpc" ] ; then
     tx_lo_path=$(echo $i | sed 's:/name$::')
  fi
done
 
if [ -z $tx_lo_path ] ; then
  echo "Can't find adf4351-tx-lpc"
  exit 1
fi
 
start=$1
end=$2
inc=$3
pause=$4
 
if [ -z $start ] ; then
  start=400
fi
 
if [ -z $end ] ; then
  end=4000
fi
 
if [ -z $inc ] ; then
  inc=5 
fi
 
if [ -z $pause ] ; then
  pause=1
fi
 
freq_tx() {
  echo $1 > $tx_lo_path/out_altvoltage0_frequency
}
 
for (( i  = $start; $i <= $end; i+=$inc));
do
  echo $i
  freq_tx `expr $i \\* 1000000`
  sleep $pause
done
resources/eval/user-guides/ad-fmcomms1-ebz/software/linux/applications/shell_scripts.txt · Last modified: 09 Feb 2021 16:11 by Robin Getz

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