apps: add named gain controls to fft and siggen apps

usage examples:

osmocom_fft -a hackrf -v
osmocom_fft -a rtl=0 -v
osmocom_fft -a uhd -v

osmocom_siggen -a hackrf -f 100e6 --sweep -x 2e6 -y 10 -v
osmocom_siggen -a uhd,subdev=A:0 -f 100e6 --sweep -x 2e6 -y 10 -s 4e6 -v

1 files changed, 51 insertions, 0 deletions

diff --git a/apps/osmocom_siggen_nogui b/apps/osmocom_siggen_nogui
new file mode 100755
index 0000000..0283fcf
--- /dev/null
+++ b/apps/osmocom_siggen_nogui
@@ -0,0 +1,51 @@
+#!/usr/bin/env python
+#
+# Copyright 2008,2009,2011,2012 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+from gnuradio import gr
+from osmosdr import osmocom_siggen_base as osmocom_siggen
+import sys
+
+def main():
+    if gr.enable_realtime_scheduling() != gr.RT_OK:
+        print "Note: failed to enable realtime scheduling, continuing"
+
+    # Grab command line options and create top block
+    try:
+        (options, args) = osmocom_siggen.get_options()
+        tb = osmocom_siggen.top_block(options, args)
+
+    except RuntimeError, e:
+        print e
+        sys.exit(1)
+
+    tb.start()
+    raw_input('Press Enter to quit: ')
+    tb.stop()
+    tb.wait()
+
+# Make sure to create the top block (tb) within a function:
+# That code in main will allow tb to go out of scope on return,
+# which will call the decontructor on usrp and stop transmit.
+# Whats odd is that grc works fine with tb in the __main__,
+# perhaps its because the try/except clauses around tb.
+if __name__ == "__main__":
+    main()