Hello list!
I've updated (or at least tried updating) two of UCLA ZIGBEE PHY project's
examples to work with UHD - cc2420_txtest.py and cc2420_rxtest.py. I think the
tx one works fine (spectrum analyzer says that we truly are transmitting at the
given frequency), however the rx example isn't receiving/decoding packages.
Could someone take a look at the modifications to see what I'm doing wrong
(maybe I am setting the frequencies/some other parameters wrong - does using
self.u.set_center_freq function suffice, or should I somehow be tuning the
frequency - if so, how?)?
It seems that the variable self.rcvd_pktq is empty (line 258 in
ieee802_15_4_pkt.py):
(part of the code where we fill up the "msg" variable):
def run(self):
while self.keep_running:
print "802_15_4_pkt: waiting for packet"
msg = self.rcvd_pktq.delete_head()
ok = 0
payload = msg.to_string()
print "received packet "
It confuses me why we aren't receiving packets (especially since the
cc2420_channel_test.py works fine).
This is the output of uhd_cc2420_rxtest.py (regardless whether I'm running the
uhd_cc2420_txtest.py on the other machine or not):
kresimir@kresimir-U52F:~/ucla_zigbee_phy/src/examples$ ./uhd_cc2420_rxtest.py
-c 2450000000 -r 100 -A TX/RX -g 20 -f rxtest.dat
linux; GNU C++ version 4.4.5; Boost_104200; UHD_003.001.000-9f1e49e
Blocked waiting for GDB attach (pid = 5466)
Press Enter to continue:
cordic_freq = 2.45G
data_rate = 100
samples_per_symbol = 2
fs = 200
-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
-- Current send frame size: 1472 bytes
-- mboard0 is MIMO master
Center frequency: 2450000000
>>> gr_fir_fff: using SSE
802_15_4_pkt: waiting for packet
Statistics: good 0 received 0
I've been using two USRP N210s (also tried on only one with TX/RX as
transmitter and RX2 as receiver - same thing) for testing with gnuradio3.3.0 on
Ubuntu 10.10
Links to files:
http://marvin.kset.org/~sunshine/uhd_cc2420_rxtest.py
http://marvin.kset.org/~sunshine/uhd_cc2420_txtest.py
Regards,
Kresimir
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