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#!/usr/bin/python
from socket import *
import string
import time
import struct;
from random import *;
import array;
import cmath;
from numpy import *;
from numpy.fft import *;
from pylab import *;
myport = randint(1025,65535);
filename = "output.dat";
msdd_port = 10001
msdd_host = "10.45.4.46"
buf = 100000;
my_udp_addr = ('',randint(1025,65535));
UDPSock = socket(AF_INET,SOCK_DGRAM);
UDPSock.bind(my_udp_addr);
f_mhz = 2500;
print "fc = %d"%(f_mhz);
f_hz = 0;
gain = 20; # attenuation
window = 3; #0=rect, 1=hanning, 2=hamming, 3=blackman
samples = 65535*4*2;
#samples = 16384;
#samples = 16*1024*1024;
#samples = samples*4; #bytes of data we are requesting
# decim 0-8 ( 3 - 8 )
#decim = 5; # rate ok
decim = 8;
decim = decim+16; # +16 to use 16bit floats instead of 32 bit floats
mode = 0; #0=IQ, 1=MAG, 2=MAGDB
#sets = 0;
sets = 0xffffffff;
size_int = 4;
request_len = 6*size_int; # 6 int items not including the 8 bytes for opcode and length fields
print "request len = %d"%(request_len);
raw_data = struct.pack("<IIIIIIII", 0x01, request_len, f_mhz, f_hz, gain, samples, decim, sets);
data = raw_data;
UDPSock.sendto(data, (msdd_host, msdd_port));
print "sent"
count = 0;
total_data = [];
state = 0;
vals = [];
mags = [];
re = [];
sample_count = 0;
IQ_bytes=0;
numtocap = 1000;
IQ_bytes = 4 * numtocap;
numbytes = 65536*100;
#numbytes = 65536*2;
#numbytes = 1024;
num_rx = 0;
start = time.time();
l = [];
arr = [];
while(num_rx < numbytes):
data = UDPSock.recv(1024);
l.append(data);
num_rx = num_rx + len(data);
end = time.time();
# send stop command
halt_data = struct.pack(">II", 0x04, 0x00);
UDPSock.sendto(halt_data, (msdd_host, msdd_port));
# perform timing analysis
print "recieved %d bytes in %f sec"%(numbytes, end-start);
bytes_per_sec = numbytes / (end-start);
samples_per_sec = bytes_per_sec / 4;
MSPS = samples_per_sec / 1000000.0;
print "Got %f MSPS"%(MSPS);
print "Expected %f MSPS"%(102.4/math.pow(2,(decim-16)));
# plot data
val_arr = [];
mag_arr = [];
mag_arr2 = [];
print "Repacking data..."
f = open("out.dat","w");
for li in l:
for p in range(0, len(li)/4):
[i,q] = struct.unpack_from("<hh", li, p*4);
val = complex(i,q);
mag_arr.append((val*conj(val)).real);
val_arr.append(val);
binchunk = struct.pack("<ff",float(val.real), float(val.imag) );
f.write(binchunk);
f.close();
dlen = len(val_arr)-1;
fft_data = [];
for i in range(1, dlen-1024, 1024*1024):
t_in = [];
for ind in range(i, i+1024):
t_in.append(val_arr[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];
print "Plotting..."
subplot(2,1,1);
plot(mag_arr);
title("T power");
subplot(2,1,2);
plot(10*log10(fft_data));
title("PSD");
show();
UDPSock.close();
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