# Add the qtsnk widgets to the layout box
self.gui.sinkLayout.addWidget(snk)
+ self.gui.dcGainEdit.setText(QtCore.QString("%1").arg(0.001))
+
# Connect up some signals
self.connect(self.gui.pauseButton, QtCore.SIGNAL("clicked()"),
self.pauseFg)
self.saveData)
self.gui.actionSaveData.setShortcut(QtGui.QKeySequence.Save)
+ self.connect(self.gui.dcGainEdit, QtCore.SIGNAL("editingFinished()"),
+ self.dcGainEditText)
+ self.connect(self.gui.dcCancelCheckBox, QtCore.SIGNAL("clicked(bool)"),
+ self.dcCancelClicked)
+
def pauseFg(self):
if(self.gui.pauseButton.text() == "Pause"):
self.fg.stop()
if(len(fileName)):
self.fg.save_to_file(str(fileName))
+ def dcGainEditText(self):
+ gain = float(self.gui.dcGainEdit.text())
+ self.fg.set_dc_gain(gain)
+
+ def dcCancelClicked(self, state):
+ self.dcGainEditText()
+ self.fg.cancel_dc(state)
+
class my_top_block(gr.top_block):
help="select Ethernet interface, default is eth0")
parser.add_option("-m", "--mac-addr", type="string", default="",
help="select USRP by MAC address, default is auto-select")
- parser.add_option("-W", "--bw", type="float", default=1e6,
+ parser.add_option("-W", "--bw", type="eng_float", default=1e6,
help="set bandwidth of receiver [default=%default]")
- parser.add_option("-f", "--freq", type="eng_float", default=None,
+ parser.add_option("-f", "--freq", type="eng_float", default=2412e6,
help="set frequency to FREQ", metavar="FREQ")
parser.add_option("-g", "--gain", type="eng_float", default=None,
help="set gain in dB (default is midpoint)")
self.amp = gr.multiply_const_cc(0.0)
self.set_amplifier_gain(100)
+ # Create a single-pole IIR filter to remove DC
+ # but don't connect it yet
+ self.dc_gain = 0.001
+ self.dc = gr.single_pole_iir_filter_cc(self.dc_gain)
+ self.dc_sub = gr.sub_cc()
+
self.connect(self.u, self.amp, self.snk)
if self.show_debug_info:
def save_to_file(self, name):
- # Pause the flow graph
- self.stop()
- self.wait()
+ self.lock()
# Add file sink to save data
self.file_sink = gr.file_sink(gr.sizeof_gr_complex, name)
self.connect(self.amp, self.file_sink)
- # Restart flow graph
- self.start()
+ self.unlock()
def set_gain(self, gain):
self._gain = gain
pass
def set_amplifier_gain(self, amp):
- self._amp_value = amp
- self.amp.set_k(self._amp_value)
+ self._amp_value = amp
+ self.amp.set_k(self._amp_value)
+
+ def set_dc_gain(self, gain):
+ self.dc.set_taps(gain)
+
+ def cancel_dc(self, state):
+ self.lock()
+
+ if(state):
+ self.disconnect(self.u, self.amp)
+ self.connect(self.u, (self.dc_sub,0))
+ self.connect(self.u, self.dc, (self.dc_sub,1))
+ self.connect(self.dc_sub, self.amp)
+ else:
+ self.disconnect(self.dc_sub, self.amp)
+ self.disconnect(self.dc, (self.dc_sub,1))
+ self.disconnect(self.u, self.dc)
+ self.disconnect(self.u, (self.dc_sub,0))
+ self.connect(self.u, self.amp)
+
+ self.unlock()
def main ():
tb = my_top_block()