Hello community,
I have a project running on an USRP N210 (a flowgraph consisting of several
OOT modules written all in C++).
I want to run the same project on an *USRP B200-mini*. I assumed that I
would only need to modify the *uhd_source* and *uhd_sink* configuration in
the */apps/main.py* file
(the rest of the project is bascially C++ code which should be independent
on the platform).
However, my usrp200-mini seems to work properly for the first command
transmitted, and then shuts down (the transmitted signal drops to 0).
Any help would be appreciated. Thank you very much for your time.
*Configuration for USRP N210+SBX*
# Configure usrp source
def u_source(self):
self.source = uhd.usrp_source(
device_addr=self.usrp_address_source,
stream_args=uhd.stream_args(
cpu_format="fc32",
channels=range(1),
),
)
self.source.set_samp_rate(self.adc_rate)
self.source.set_center_freq(self.freq, 0)
self.source.set_gain(self.rx_gain, 0)
self.source.set_antenna("RX2", 0)
self.source.set_auto_dc_offset(False) # Uncomment this line for SBX
daughterboard
# Configure usrp sink
def u_sink(self):
self.sink = uhd.usrp_sink(
device_addr=self.usrp_address_sink,
stream_args=uhd.stream_args(
cpu_format="fc32",
channels=range(1),
)
)
self.sink.set_samp_rate(self.dac_rate)
self.sink.set_center_freq(self.freq, 0)
self.sink.set_gain(self.tx_gain, 0)
self.sink.set_antenna("TX/RX", 0)
def __init__(self, myfreq):
gr.top_block.__init__(self)
self.dac_rate = 100e6/50 # DAC rate
self.adc_rate = 100e6/26 # ADC rate
self.freq = myfreq
self.rx_gain = -5
self.tx_gain = 25
self.usrp_address_source = "addr=192.168.10.105"
self.usrp_address_sink = "addr=192.168.10.105"
*Configuration for USRPN210+SBX*
self.source = uhd.usrp_source(
device_addr=self.usrp_address_source,
stream_args=uhd.stream_args(
cpu_format="fc32",
channels=range(1),
),
)
self.source.set_samp_rate(self.adc_rate)
self.source.set_center_freq(self.freq, 0)
self.source.set_gain(self.rx_gain, 0)
self.source.set_antenna("RX2", 0)
self.source.set_auto_dc_offset(False)
# Configure usrp sink
def u_sink(self):
self.sink = uhd.usrp_sink(
device_addr=self.usrp_address_sink,
stream_args=uhd.stream_args(
cpu_format="fc32",
channels=range(1),
)
)
self.sink.set_samp_rate(self.dac_rate)
self.sink.set_center_freq(self.freq, 0)
self.sink.set_gain(self.tx_gain, 0)
self.sink.set_antenna("TX/RX", 0)
def __init__(self, myfreq):
gr.top_block.__init__(self)
self.dac_rate = 100e6/44 # DAC rate
self.adc_rate = 100e6/44 # ADC rate
self.rx_gain = 300
self.tx_gain = 300
self.usrp_address_source = "serial=31861F8"
self.usrp_address_sink = "serial=31861F8"
--
*Laura Arjona *
*Paul G. Allen School of Computer Science & Engineering*
185 E Stevens Way NE
University of Washington
Seattle, WA 98195-2350
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