[Commit-gnuradio] [gnuradio] 01/14: Print scan rate

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trondeau pushed a commit to branch master
in repository gnuradio.

commit cab7c1eb5c0d323ade589f33e0703dd6fe9c237b
Author: Chris Kuethe <address@hidden>
Date:   Sun May 3 16:05:00 2015 -0700

    Print scan rate
    
    Useful when scanning in a way that is likely to run slowly, doubly
    so when multiple passes across the band are needed.
---
 gr-uhd/examples/python/usrp_spectrum_sense.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/gr-uhd/examples/python/usrp_spectrum_sense.py 
b/gr-uhd/examples/python/usrp_spectrum_sense.py
index ba45a2e..b1ea6b4 100755
--- a/gr-uhd/examples/python/usrp_spectrum_sense.py
+++ b/gr-uhd/examples/python/usrp_spectrum_sense.py
@@ -33,6 +33,7 @@ import math
 import struct
 import threading
 from datetime import datetime
+import time
 
 sys.stderr.write("Warning: this may have issues on some machines+Python 
version combinations to seg fault due to the callback in bin_statitics.\n\n")
 
@@ -271,6 +272,8 @@ def main_loop(tb):
     bin_start = int(tb.fft_size * ((1 - 0.75) / 2))
     bin_stop = int(tb.fft_size - bin_start)
 
+    timestamp = 0
+    centerfreq = 0
     while 1:
 
         # Get the next message sent from the C++ code (blocking call).
@@ -282,6 +285,15 @@ def main_loop(tb):
         # m.raw_data is a string that contains the binary floats.
         # You could write this as binary to a file.
 
+        # Scanning rate
+        if timestamp == 0:
+            timestamp = time.time()
+            centerfreq = m.center_freq
+        if m.center_freq < centerfreq:
+            sys.stderr.write("scanned %.1fMHz in %.1fs\n" % ((centerfreq - 
m.center_freq)/1.0e6, time.time() - timestamp))
+            timestamp = time.time()
+        centerfreq = m.center_freq
+
         for i_bin in range(bin_start, bin_stop):
 
             center_freq = m.center_freq