From 387d6d26a45e1ac037164eea875d87ffae0a1bac Mon Sep 17 00:00:00 2001
From: nldudok1 <nldudok1@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Fri, 21 Dec 2007 04:43:55 +0000
Subject: bugfix for low decimation rates (dec<8)
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@7236 221aa14e-8319-0410-a670-987f0aec2ac5
---
gr-utils/src/python/usrp_fft.py | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
(limited to 'gr-utils/src/python/usrp_fft.py')
diff --git a/gr-utils/src/python/usrp_fft.py b/gr-utils/src/python/usrp_fft.py
index 58da671472..c98f01eb48 100755
--- a/gr-utils/src/python/usrp_fft.py
+++ b/gr-utils/src/python/usrp_fft.py
@@ -69,6 +69,8 @@ class app_top_block(stdgui2.std_top_block):
help="Enable waterfall display")
parser.add_option("-8", "--width-8", action="store_true", default=False,
help="Enable 8-bit samples across USB")
+ parser.add_option( "--no-hb", action="store_true", default=False,
+ help="don't use halfband filter in usrp")
parser.add_option("-S", "--oscilloscope", action="store_true", default=False,
help="Enable oscilloscope display")
(options, args) = parser.parse_args()
@@ -79,8 +81,17 @@ class app_top_block(stdgui2.std_top_block):
self.show_debug_info = True
# build the graph
+ if options.no_hb or (options.decim<8):
+ #Min decimation of this firmware is 4.
+ #contains 4 Rx paths without halfbands and 0 tx paths.
+ self.fpga_filename="std_4rx_0tx.rbf"
+ self.u = usrp.source_c(which=options.which, decim_rate=options.decim, fpga_filename=self.fpga_filename)
+ else:
+ #Min decimation of standard firmware is 8.
+ #standard fpga firmware "std_2rxhb_2tx.rbf"
+ #contains 2 Rx paths with halfband filters and 2 tx paths (the default)
+ self.u = usrp.source_c(which=options.which, decim_rate=options.decim)
- self.u = usrp.source_c(which=options.which, decim_rate=options.decim)
if options.rx_subdev_spec is None:
options.rx_subdev_spec = pick_subdevice(self.u)
self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
--
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