cnt = 0
while True:
for pixel in range(64):
[xo, yo] = pixel_list[pixel, :]
print '%2d: %.3f %.3f' % (pixel, xo, yo)
fft_phase = gp.initial_phase_orig(257 - xo, 257 - yo, 512)
#print 'phase_offset',gp.phase_offset
# generate encoding matrix
seed = cnt + 1
code = gp.encrypt(seed, 512, 128)
fft_phase += code
# send to Alice SLM
gp.write2file(fft_phase, gp.phasemap, SLMpath, '99')
# send decoding matrix to Bob SLM
decode = gp.decrypt(code, xshift, yshift, nrows)
gp.write2file(decode, gp.phasemap, SLMpath, '100')
send(99)
msg = wait()
time.sleep(0.1)
if int(msg) < 0:
print 'Problem with SLM setting'
break
# start taking data
start = buf.datapoints
time.sleep(Tacq)
stop = buf.datapoints
if logtags:
tup = buf[-(stop -
start):] # a tuple of chan tags, and time tags
save_thread = threading.Thread(None,
nrows = 512
cnt = 0
seed = 1 # use same random pattern all the time
# compute random phase and set alice
code = gp.encrypt(seed,512,128)
# figure phases to point to pixel
fft_phase = gp.initial_phase_orig(257-xo,257-yo, 512)
fft_phase += code
gp.write2file(fft_phase, gp.phasemap, SLMpath, '99')
for xshift in range(-10,11):
for yshift in range(-10,11):
print 'xshift, yshift: %3d %3d'%(xshift,yshift)
# send decoding matrix to Bob SLM, vary xshift, yshift
decode = gp.decrypt(code, xshift, yshift, nrows)
gp.write2file(decode, gp.phasemap, SLMpath, '100')
send(99)
msg = wait()
if int(msg)<0:
print 'Problem with SLM setting'
raise('Problem with SLM setting')
break
# start taking data
start = buf.datapoints
time.sleep(Tacq)
stop = buf.datapoints
if logtags:
tup = buf[-(stop - start):] # a tuple of chan tags, and time tags
save_thread = threading.Thread(None, target = tags2file, args=(dataPath, tup,cnt))
save_thread.start()