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import time
import unittest
import SoapySDR
from SoapySDR import * #SOAPY_SDR_* constants
import numpy as np
SDR_ARGS = {'driver': 'lime'}
class TestBasicStreaming(unittest.TestCase):
def setUp(self):
self.sdr = SoapySDR.Device(SDR_ARGS)
# We need to detect the number of channels as the LimeSDR has two
# and the LimeSDR-Mini has one
chans = range(self.sdr.getNumChannels(0))
for ch in chans:
self.sdr.setSampleRate(SOAPY_SDR_RX, ch, 10e6)
self.sdr.setSampleRate(SOAPY_SDR_TX, ch, 10e6)
self.rxStream = self.sdr.setupStream(SOAPY_SDR_RX, SOAPY_SDR_CF32, chans)
self.txStream = self.sdr.setupStream(SOAPY_SDR_TX, SOAPY_SDR_CF32, chans)
def tearDown(self):
self.sdr.closeStream(self.rxStream)
self.sdr.closeStream(self.txStream)
self.sdr = None
def testTime(self):
print('===== test the timestamps =====')
self.sdr.activateStream(self.txStream)
self.sdr.activateStream(self.rxStream)
t0 = self.sdr.getHardwareTime()
print('t0=%d ns'%t0)
time.sleep(0.1)
t1 = self.sdr.getHardwareTime()
print('t1=%d ns'%t1)
delta = float(t1-t0)/1e8
print('delta=%f secs'%delta)
self.assertGreater(delta, 0.9)
self.assertLess(delta, 1.1)
self.sdr.deactivateStream(self.txStream)
self.sdr.deactivateStream(self.rxStream)
def testRxContinuous(self):
print('===== receive a continuous stream =====')
self.sdr.activateStream(self.rxStream)
buff0 = np.zeros(1024, np.complex64)
buff1 = np.zeros(1024, np.complex64)
print('readStream continuously...')
doneLoopTime = time.time() + 0.1
while time.time() < doneLoopTime:
sr = self.sdr.readStream(self.rxStream, [buff0, buff1], 1024)
self.assertGreater(sr.ret, 0)
#deactivate
self.sdr.deactivateStream(self.rxStream)
print('readStream for a timeout...')
sr = self.sdr.readStream(self.rxStream, [buff0, buff1], 1024)
print(sr)
self.assertEqual(sr.ret, SOAPY_SDR_TIMEOUT)
def testRxBurstNow(self):
print('===== receive a burst asap =====')
numElemsRequest = 10000
self.sdr.activateStream(self.rxStream, SOAPY_SDR_END_BURST, 0, numElemsRequest)
buff0 = np.zeros(1024, np.complex64)
buff1 = np.zeros(1024, np.complex64)
print('readStream for a burst...')
while numElemsRequest > 0:
sr = self.sdr.readStream(self.rxStream, [buff0, buff1], 1024)
print(sr)
self.assertGreater(sr.ret, 0)
numElemsRequest -= sr.ret
#only end burst marked on the last
if numElemsRequest: self.assertFalse(sr.flags & SOAPY_SDR_END_BURST)
else: self.assertTrue(sr.flags & SOAPY_SDR_END_BURST)
self.assertEqual(numElemsRequest, 0)
print('readStream for a timeout...')
sr = self.sdr.readStream(self.rxStream, [buff0, buff1], 1024)
print(sr)
self.assertEqual(sr.ret, SOAPY_SDR_TIMEOUT)
self.sdr.deactivateStream(self.rxStream)
def testRxBurstAtTime(self):
print('===== receive a timed burst =====')
numElemsRequest = 10000
tBurst = self.sdr.getHardwareTime() + int(1e8)
self.sdr.activateStream(self.rxStream, SOAPY_SDR_END_BURST | SOAPY_SDR_HAS_TIME, tBurst, numElemsRequest)
buff0 = np.zeros(1024, np.complex64)
buff1 = np.zeros(1024, np.complex64)
print('readStream for a timed burst...')
tFirst = -1
while numElemsRequest > 0:
sr = self.sdr.readStream(self.rxStream, [buff0, buff1], 1024, timeoutUs=int(1e6))
print(sr)
self.assertGreater(sr.ret, 0)
numElemsRequest -= sr.ret
if tFirst == -1:
tFirst = sr.timeNs
self.assertTrue(sr.flags & SOAPY_SDR_HAS_TIME)
#only end burst marked on the last
if numElemsRequest: self.assertFalse(sr.flags & SOAPY_SDR_END_BURST)
else: self.assertTrue(sr.flags & SOAPY_SDR_END_BURST)
#check that the first timestamp was correct
#there is some play in the nanosecond conversion,
#but it should be the same 10 MHz clock tick
self.assertEqual(tFirst/100, tBurst/100)
self.assertEqual(numElemsRequest, 0)
print('readStream for a timeout...')
sr = self.sdr.readStream(self.rxStream, [buff0, buff1], 1024)
print(sr)
self.assertEqual(sr.ret, SOAPY_SDR_TIMEOUT)
self.sdr.deactivateStream(self.rxStream)
def testRxLateBurst(self):
print('===== receive a late burst =====')
numElemsRequest = 10000
tBurst = self.sdr.getHardwareTime() + int(1e8)
self.sdr.activateStream(self.rxStream, SOAPY_SDR_END_BURST | SOAPY_SDR_HAS_TIME, tBurst, numElemsRequest)
buff0 = np.zeros(1024, np.complex64)
buff1 = np.zeros(1024, np.complex64)
print('readStream for a late burst...')
time.sleep(1.0) #make sure the readStream is late
sr = self.sdr.readStream(self.rxStream, [buff0, buff1], 1024, timeoutUs=int(1e6))
self.assertEqual(sr.ret, SOAPY_SDR_TIME_ERROR)
print('readStream for a timeout...')
sr = self.sdr.readStream(self.rxStream, [buff0, buff1], 1024)
print(sr)
self.assertEqual(sr.ret, SOAPY_SDR_TIMEOUT)
self.sdr.deactivateStream(self.rxStream)
def testTxLate(self):
print('===== test txing a late packet =====')
self.sdr.activateStream(self.txStream)
self.sdr.activateStream(self.rxStream)
t0 = self.sdr.getHardwareTime()
tLate = t0 + int(1e8)
buff0 = np.zeros(1024, np.complex64)
buff1 = np.zeros(1024, np.complex64)
flags = SOAPY_SDR_HAS_TIME | SOAPY_SDR_END_BURST
time.sleep(1.0) #make sure the writeStream is late
self.sdr.writeStream(self.txStream,
[buff0, buff1], 1024,
flags=flags,
timeNs=tLate,
timeoutUs=int(1e6))
#small wait for late packet to get reported
time.sleep(0.1)
print('readStreamStatus for a late indicator...')
r0 = self.sdr.readStreamStatus(self.txStream)
self.assertEqual(r0.ret, SOAPY_SDR_TIME_ERROR)
self.assertTrue(r0.flags & SOAPY_SDR_HAS_TIME)
#TODO check the delta when we have an understanding of the time reported
delta = float(r0.timeNs-t0)/1e9
print('delta=%f secs'%delta)
#self.assertGreater(delta, 1.4)
#self.assertLess(delta, 1.6)
print('readStreamStatus for a timeout...')
r1 = self.sdr.readStreamStatus(self.txStream)
self.assertNotEqual(r1.ret, SOAPY_SDR_TIME_ERROR)
self.sdr.deactivateStream(self.txStream)
self.sdr.deactivateStream(self.rxStream)
if __name__ == '__main__':
unittest.main()
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