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
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))
with open(filename, "wb") as wf:
wf.write(b"RIFF")
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()
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)))
