Merged r6271:6278 from jcorgan/t182 into trunk. Implements ticket:182.

Created new top-level component, gr-utils, to hold commonly used utility
scripts (originally in gnuradio-examples).  These now install into the 
system path, allowing their use from wherever.

Reorganization of gnuradio-examples component:

 * Commonly used utility scripts moved from python/usrp into gr-utils.
 * Examples now install into $(prefix)/share/gnuradio/examples/...
 * Channel coding examples moved into gr-trellis/src/examples, now install
   from there, only if gr-atsc itself is going to built and installed.
 * ATSC example scripts now install into example hierarchy
 * Cruft has been moved into 'limbo' in repository, do not get installed

Trunk passes 'make distcheck'.



git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@6279 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 62 insertions, 0 deletions

diff --git a/gnuradio-examples/python/usrp/limbo/siggen_min2.py b/gnuradio-examples/python/usrp/limbo/siggen_min2.py
new file mode 100755
index 000000000..8709e3373
--- /dev/null
+++ b/gnuradio-examples/python/usrp/limbo/siggen_min2.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python
+
+from gnuradio import gr
+from gnuradio import usrp
+from gnuradio import eng_notation
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+
+
+def build_graph ():
+
+    # interp = 32
+    interp = 64
+    nchan = 2
+    
+    if nchan == 1:
+        mux = 0x0098
+        #mux = 0x9800
+    else:
+        mux = 0xba98
+
+    f0 = 100e3
+    a0 = 16e3
+    duc0 = 5e6
+
+    f1 = 50e3
+    a1 = 16e3
+    duc1 = 7e6
+
+    fg = gr.flow_graph ()
+
+    u = usrp.sink_c (0, interp, nchan, mux)
+    sample_rate = u.dac_freq () / interp
+    print "sample_rate = ", eng_notation.num_to_str (sample_rate)
+    print "usb_sample_rate = ", eng_notation.num_to_str (sample_rate * nchan)
+
+    u.set_tx_freq (0, duc0)
+    u.set_tx_freq (1, duc1)
+
+    interleave = gr.interleave (gr.sizeof_gr_complex)
+    fg.connect (interleave, u)
+
+    src0 = gr.sig_source_c (sample_rate, gr.GR_SIN_WAVE, f0, a0, 0)
+    fg.connect (src0, (interleave, 0))
+
+    if nchan == 2:
+        if 1:
+            src1 = gr.sig_source_c (sample_rate, gr.GR_SIN_WAVE, f1, a1, 0)
+        else:
+            src1 = gr.noise_source_c (gr.GR_UNIFORM, a1)
+        fg.connect (src1, (interleave, 1))
+    
+    return fg
+
+
+if __name__ == '__main__':
+    fg = build_graph ()
+    fg.start ()
+    raw_input ('Press Enter to quit: ')
+    fg.stop ()
+