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#!/usr/bin/python
from socket import *
import string
import time
import struct;
import random;
import array;
import cmath;
from numpy import *;
from numpy.fft import *;
from pylab import *;
myport = random.randint(1025,65535);
filename = "output.dat";
port = 10000
host = "10.45.4.46"
#host = "10.45.4.41"
myaddr = ('',myport);
buf = 100000;
TCPSock = socket(AF_INET,SOCK_STREAM);
TCPSock.bind(myaddr);
TCPSock.connect((host,port));
#f_mhz = 2647; # roof ofdm
if(len(sys.argv)!= 3):
print "usage: %s fc_ghz decim_pow2_exponent"%(sys.argv[0]);
sys.exit(-1);
f_mhz = float(sys.argv[1])*1000;
decim = int(sys.argv[2]);
#f_mhz = 3500;
#f_mhz = 2600;
f_hz = 0; # offset
gain = 0;
window = 3; #0=rect, 1=hanning, 2=hamming, 3=blackman
samples = 65536;
#samples = 16777216;
samples = samples*4; #bytes of data we are requesting
samples=samples*2;
#decim = 2; #0-8 (3 => 2^3 = 8)
decim = decim+16; # +16 to use 16bit floats instead of 32 bit floats
mode = 0; #0=IQ, 1=MAG, 2=MAGDB
sets = 1;
raw_data = struct.pack("<IIIIIIII", 0x01, 0x18, f_mhz, f_hz, gain, samples, decim, sets);
data = raw_data;
TCPSock.send(data);
print "sent"
count = 0;
total_data = [];
state = 0;
vals = [];
mags = [];
re = [];
sample_count = 0;
IQ_bytes=0;
while(TCPSock):
if(state==0):
data = TCPSock.recv(4);
[opcode] = struct.unpack("<I", data);
print "Opcode = %d"%(opcode);
if(opcode==1):
state = 1;
elif(state==1):
data = TCPSock.recv(7*4);
args = struct.unpack("<IIIIIII", data);
print ["reply_len", "freq_mhz", "offset_hz", "gain", "sample_bytes", "decim", "sets_remain"];
print args;
IQ_bytes = args[0] - 7*4;
state =2;
elif(state==2):
data = TCPSock.recv(4);
[i,q] = struct.unpack("<hh", data);
tmp = complex(i,q);
re.append(i);
vals.append(tmp);
mags.append(abs(tmp));
sample_count = sample_count + 1;
# print "sample count %d"%(sample_count)
IQ_bytes = IQ_bytes - 4;
if(IQ_bytes < 4):
print "got all data (total %d)"%(sample_count);
print "remaining: %d"%(IQ_bytes);
break;
TCPSock.close();
print "done"
nmags = []
for i in mags:
if i == 0:
i=1;
nmags.append(i);
subplot(2,1,1);
plot(nmags);
#plot(10*log10(nmags));
dlen = len(vals);
fftlen = (dlen-1024)/1024;
fft_data = []
for i in range(1, dlen-1025, 1024):
t_in = [];
for ind in range(i, i+1024):
t_in.append(vals[ind]);
#tmp = 20*log10(fftshift(fft(t_in)));
tmp = (fftshift(fft(t_in)));
if(len(fft_data) == 0):
for ind in range(0,1024):
fft_data.append( tmp[ind] );
else:
for ind in range(0,1024):
fft_data[ind] = fft_data[ind] + tmp[ind];
#fft_data = 20*log10(fftshift(fft(vals)));
subplot(2,1,2);
plot(fft_data);
show();
f = open(filename, "w");
for sample in vals:
binchunk = struct.pack("<ff",float(sample.real), float(sample.imag) );
f.write(binchunk);
f.close();
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