From df4f14f220154276f4ee384dadd4078c75046fbe Mon Sep 17 00:00:00 2001
From: Bastian Bloessl <bloessl@ccs-labs.org>
Date: Wed, 4 Mar 2015 16:21:27 +0100
Subject: [PATCH] add script to enable / disable DC offset correction

---
 utils/dc_offset.py | 77 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100755 utils/dc_offset.py

diff --git a/utils/dc_offset.py b/utils/dc_offset.py
new file mode 100755
index 0000000..cce88a1
--- /dev/null
+++ b/utils/dc_offset.py
@@ -0,0 +1,77 @@
+#!/usr/bin/env python
+##################################################
+# Gnuradio Python Flow Graph
+# Title: Dc Offset
+# Generated: Sat Jan  3 17:36:59 2015
+##################################################
+
+from gnuradio import blocks
+from gnuradio import eng_notation
+from gnuradio import gr
+from gnuradio import uhd
+from gnuradio.eng_option import eng_option
+from gnuradio.filter import firdes
+from optparse import OptionParser
+import time
+
+class dc_offset(gr.top_block):
+
+    def __init__(self, dc=0):
+        gr.top_block.__init__(self, "Dc Offset")
+
+        ##################################################
+        # Parameters
+        ##################################################
+        self.dc = dc
+
+        ##################################################
+        # Variables
+        ##################################################
+        self.samp_rate = samp_rate = 32000
+
+        ##################################################
+        # Blocks
+        ##################################################
+        self.uhd_usrp_sink_0 = uhd.usrp_sink(
+        	",".join(("", "")),
+        	uhd.stream_args(
+        		cpu_format="fc32",
+        		channels=range(1),
+        	),
+        )
+        self.uhd_usrp_sink_0.set_samp_rate(samp_rate)
+        self.uhd_usrp_sink_0.set_center_freq(0, 0)
+        self.uhd_usrp_sink_0.set_gain(0, 0)
+        self.uhd_usrp_sink_0.set_dc_offset(bool(dc), 0)
+        self.blocks_null_source_0 = blocks.null_source(gr.sizeof_gr_complex*1)
+
+        ##################################################
+        # Connections
+        ##################################################
+        self.connect((self.blocks_null_source_0, 0), (self.uhd_usrp_sink_0, 0))
+
+
+
+    def get_dc(self):
+        return self.dc
+
+    def set_dc(self, dc):
+        self.dc = dc
+
+    def get_samp_rate(self):
+        return self.samp_rate
+
+    def set_samp_rate(self, samp_rate):
+        self.samp_rate = samp_rate
+        self.uhd_usrp_sink_0.set_samp_rate(self.samp_rate)
+
+if __name__ == '__main__':
+    parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
+    parser.add_option("", "--dc", dest="dc", type="intx", default=0,
+        help="Set dc [default=%default]")
+    (options, args) = parser.parse_args()
+    tb = dc_offset(dc=options.dc)
+    tb.start()
+    raw_input('Press Enter to quit: ')
+    tb.stop()
+    tb.wait()