From a91849871371d35cf1cd6d52a9287082d3628a1a Mon Sep 17 00:00:00 2001
From: Xianjun Jiao <xianjun.jiao@ugent.be>
Date: Mon, 28 Mar 2022 12:16:41 +0200
Subject: [PATCH] Add script to restrict openwifi only use a fixed frequency:
 to avoid extra tuning/scanning operation/procedure bringing ad9361
 calibration and Linux channenl setting activities

---
 user_space/set_restrict_freq.sh | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100755 user_space/set_restrict_freq.sh

diff --git a/user_space/set_restrict_freq.sh b/user_space/set_restrict_freq.sh
new file mode 100755
index 0000000..a9e9428
--- /dev/null
+++ b/user_space/set_restrict_freq.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+
+home_dir=$(pwd)
+
+if test -d "/sys/devices/platform/fpga-axi@0/fpga-axi@0:sdr"; then
+  cd /sys/devices/platform/fpga-axi@0/fpga-axi@0:sdr
+else 
+  cd /sys/devices/soc0/fpga-axi\@0/fpga-axi\@0\:sdr
+fi
+
+# set
+if [[ -n $1 ]]; then
+  echo $1 > restrict_freq_mhz
+fi
+
+# show
+cat restrict_freq_mhz
+
+cd $home_dir
+