class ScopeInterface(QObject):
new_data = pyqtSignal(list)
def __init__(self, parent=None):
super(ScopeInterface, self).__init__(parent)
self.inprogress = False
def initialize(self):
self.sample_rate_index = 8
self.voltage_range = 0x01
self.data_points = 3 * 1024
self.trigger_level = 150
self.trigger_type = +1
self.scope = Oscilloscope()
self.scope.setup()
self.scope.open_handle()
if (not self.scope.is_device_firmware_present):
self.scope.flash_firmware()
self.scope.set_interface(1)
# choose ISO
self.scope.set_num_channels(1)
self.scope.set_sample_rate(self.sample_rate_index)
self.scope.set_ch1_voltage_range(self.voltage_range)
time.sleep(0.1)
return None
def capture(self):
if not self.inprogress:
self.inprogress = True
self.scope.start_capture()
shutdown_event = self.scope.read_async(self.data_callback,
self.data_points,
outstanding_transfers=25)
print("Clearing FIFO and starting data transfer...")
def data_callback(self, ch1_data, _):
d = list(ch1_data)
i = 0
#print("got new data ", time.time(), " : ", len(d))
if self.trigger_type > 0:
while (i < len(d) - 1) and not (d[i + 1] > self.trigger_level
and d[i] < self.trigger_level):
i += 1
#print("Trigger at ", i)
if (i != len(d) - 1):
self.new_data.emit(d[i:])
def stop(self):
self.scope.stop_capture()
print("Stopping new transfers.")
shutdown_event.set()
print("Snooze 1")
time.sleep(1)
print("Closing handle")
self.scope.close_handle()
print("Handle closed.")
self.inprogress = False
class ScopeInterface(QObject):
new_data = pyqtSignal(list)
def __init__(self, parent=None):
super(ScopeInterface, self).__init__(parent)
self.inprogress = False
def initialize(self):
self.sample_rate_index = 8
self.voltage_range = 0x01
self.data_points = 3 * 1024
self.trigger_level = 150
self.trigger_type = +1
self.scope = Oscilloscope()
self.scope.setup()
self.scope.open_handle()
if (not self.scope.is_device_firmware_present):
self.scope.flash_firmware()
self.scope.set_interface(1); # choose ISO
self.scope.set_num_channels(1)
self.scope.set_sample_rate(self.sample_rate_index)
self.scope.set_ch1_voltage_range(self.voltage_range)
time.sleep(0.1)
return None
def capture(self):
if not self.inprogress:
self.inprogress = True
self.scope.start_capture()
shutdown_event = self.scope.read_async(self.data_callback, self.data_points, outstanding_transfers=25)
print("Clearing FIFO and starting data transfer...")
def data_callback(self, ch1_data, _):
d = list(ch1_data)
i = 0
#print("got new data ", time.time(), " : ", len(d))
if self.trigger_type > 0:
while (i < len(d) - 1) and not (d[i+1] > self.trigger_level and d[i] < self.trigger_level):
i += 1
#print("Trigger at ", i)
if (i != len(d) - 1):
self.new_data.emit(d[i:])
def stop(self):
self.scope.stop_capture()
print("Stopping new transfers.")
shutdown_event.set()
print("Snooze 1")
time.sleep(1)
print("Closing handle")
self.scope.close_handle()
print("Handle closed.")
self.inprogress = False
time.sleep(1)
print("now")
data = []
data_extend = data.append
def extend_callback(ch1_data, _):
global data_extend
data_extend(ch1_data)
start_time = time.time()
print("Clearing FIFO and starting data transfer...")
shutdown_event = scope.read_async(extend_callback,
blocksize,
outstanding_transfers=10,
raw=True)
scope.start_capture()
while time.time() - start_time < numseconds:
scope.poll()
print("Stopping new transfers.")
#scope.stop_capture()
shutdown_event.set()
time.sleep(1)
scope.stop_capture()
scope.close_handle()
total = sum(len(block) for block in data)
filename = "test.wav"
print("Writing out data from scope to {}".format(filename))
scope.set_ch1_voltage_range(voltage_range)
time.sleep(1)
data = deque(maxlen=2*1024*1024)
data_extend = data.extend
def extend_callback(ch1_data, _):
global data_extend
data_extend(ch1_data)
start_time = time.time()
print("Clearing FIFO and starting data transfer...")
i = 0
scope.start_capture()
shutdown_event = scope.read_async(extend_callback, data_points, outstanding_transfers=10, raw=True)
while time.time() - start_time < 1:
scope.poll()
scope.stop_capture()
print("Stopping new transfers.")
shutdown_event.set()
print("Snooze 1")
time.sleep(1)
print("Closing handle")
scope.close_handle()
print("Handle closed.")
print("Points in buffer:", len(data))
scaled_data = scope.scale_read_data(data, voltage_range)
with open('/tmp/continuous_read.out','wt') as ouf:
ouf.write(str(scaled_data[:65536])[1:-1].replace(', ',chr(10)))
plt.figure(0)
print "Reading data from scope! in ",
for x in range(0, 3):
print 3-x,"..",
sys.stdout.flush()
time.sleep(1)
print "now"
data = []
data_extend = data.append
def extend_callback(ch1_data, _):
data_extend(ch1_data)
start_time = time.time()
print "Clearing FIFO and starting data transfer..."
shutdown_event = scope.read_async(extend_callback, blocksize, outstanding_transfers=10,raw=True)
scope.start_capture()
while time.time() - start_time < numseconds:
time.sleep(0.01)
print "Stopping new transfers."
#scope.stop_capture()
shutdown_event.set()
time.sleep(1)
scope.stop_capture()
scope.close_handle()
total = 0
for block in data:
total = total + len(block)
filename = "test.wav"
print "Writing out data from scope to {}".format(filename)
scope.set_sample_rate(sample_rate_index)
scope.set_ch1_voltage_range(voltage_range)
time.sleep(1)
data = deque(maxlen=2 * 1024 * 1024)
data_extend = data.extend
def extend_callback(ch1_data, _):
global data_extend
data_extend(ch1_data)
start_time = time.time()
shutdown_event = scope.read_async(extend_callback,
data_points,
outstanding_transfers=25)
print("Clearing FIFO and starting data transfer...")
i = 0
scope.start_capture()
while time.time() - start_time < 1:
scope.poll()
scope.stop_capture()
print("Stopping new transfers.")
shutdown_event.set()
print("Snooze 1")
time.sleep(1)
print("Closing handle")
scope.close_handle()
print("Handle closed.")
print("Points in buffer:", len(data))
#
##########################################################
skip1st = True # marker for skip of 1st (unstable) packet
tick = 1 / sample_rate # time between two samples
totalsize = 0
dc1 = dc2 = rms1 = rms2 = 0
timestep = 0
start_time = time.time(
) + scope.packetsize / sample_rate # correct the 1st skipped block
# GO!
scope.start_capture()
shutdown_event = scope.read_async(pcb,
scope.packetsize,
outstanding_transfers=10,
raw=True)
# sample until time is over, show the progress
lastsec = None
while True:
to_go = start_time + sample_time - time.time()
if to_go <= -downsample * 256 * tick:
break
if int(to_go) != lastsec:
if None == lastsec:
sys.stderr.write("\rCapturing " + str(sample_time) +
" seconds ... ")
elif lastsec > 0:
sys.stderr.write("\rCapturing " + str(lastsec) +
" seconds ... ")
numchannels = 1
blocksize = 6*1024 # should be divisible by 6*1024
alternative = 1 # choose ISO 3072 bytes per 125 us
@atexit.register
def close():
time.sleep(2)
scope.stop_capture()
scope.close_handle()
data = []
data_extend = data.append
def extend_callback(ch1_data, _):
data_extend(ch1_data)
f = open("test.out", "wb")
scope = Oscilloscope()
scope.setup()
scope.open_handle()
scope.set_interface(alternative);
scope.set_num_channels(numchannels)
scope.set_ch1_voltage_range(voltage_range)
scope.set_sample_rate(samplerate)
scope.start_capture()
while True:
scope.read_async(extend_callback, blocksize, outstanding_transfers=1,raw=True)
for block in data:
f.write(block)
