def start_device():
# Connect to BITalino
device = BITalino(settings.bitalino.mac_address)
# Set battery threshold
device.battery(settings.bitalino.battery_led_threshold)
# Read BITalino version
logger.info(device.version())
# Start Acquisition
device.start(settings.sampling.base_sample_rate, [0, 1, 2, 3])
return device
def launch_acquisition(msg):
global isAcquiring
isAcquiring = 1
macAddress = msg['payload']['macAddress']
# This example will collect data for 5 sec.
running_time = 9
batteryThreshold = 30
acqChannels = [0, 1, 2, 3, 4, 5]
samplingRate = 1000
nSamples = 10
digitalOutput = [1, 1]
# Connect to BITalino
device = BITalino(macAddress)
# Set battery threshold
device.battery(batteryThreshold)
# Read BITalino version
print(device.version())
# ON/OFF
device.trigger([1, 1])
device.trigger([0, 0])
# Start Acquisition
device.start(samplingRate, acqChannels)
start = time.time()
end = time.time()
while (end - start) < running_time and isAcquiring == 1:
# Read samples
data = device.read(nSamples)
print(data)
msg['payload']['val'] = data.tolist()
end = time.time()
# Stop acquisition
device.stop()
# Close connection
device.close()
isAcquiring = 0
return ("success")
try:
# Connect to BITalino
device = BITalino(device)
except:
print "Error: cannot connect to BITalino"
exit()
# Read BITalino version
print(device.version())
# Set battery threshold
device.battery(batterythreshold)
# Start Acquisition
device.start(fsample, channels)
# Turn BITalino led on
digitalOutput = [1,1]
device.trigger(digitalOutput)
startfeedback = time.time();
countfeedback = 0;
print "STARTING STREAM"
while True:
# measure the time that it takes
start = time.time();
# read the selected channels from the
running_time = 100
batteryThreshold = 30
acqChannels = [0]
samplingRate = 100
nSamples = 1
digitalOutput = [1, 1]
# Connect to BITalino
device = BITalino(macAddress)
# Set battery threshold
device.battery(batteryThreshold)
# Start Acquisition
device.start(samplingRate, acqChannels)
start = time.time()
end = time.time()
i = 0
while (end - start) < running_time:
raw = device.read(nSamples).tolist()
print(raw[0][5])
xdata.append(i)
ydata.append(raw[0][5])
oldValue = raw[0][5]
plt.plot(xdata, ydata)
plt.draw()
class bitalino_device(object):
def __init__(self, macAddress, batteryThreshold, samplingRate, nSamples):
self.macAddress = macAddress
self.batteryThreshold = batteryThreshold
self.acqChannels = [0, 1, 2, 3, 4, 5]
self.samplingRate = samplingRate
self.nSamples = nSamples
self.status = 0
self.ledOn = [1, 0]
self.ledOff = [0, 1]
self.attSensors = "this"
self.file = ""
self.threshold = 5
self.noise = [1, 1, 1, 1, 1, 1]
self.prevData = [0, 0, 0, 0, 0, 0]
def connect(self):
try:
self.connection = BITalino(self.macAddress)
self.status = 1
except:
print('failed to connect')
def state(self):
return self.connection.state()
def start(self):
self.connection.start(self.samplingRate, self.acqChannels)
def start_read(self):
return self.connection.read(self.nSamples)
def stop(self):
self.connection.stop()
def led_on(self):
self.connection.trigger(self.ledOn)
def led_off(self):
self.connection.trigger(self.ledOff)
def create_file(self, current_directory):
print('in create file')
new_file = bitFile(self.macAddress, self.acqChannels,
self.samplingRate, self.attSensors)
self.file = new_file.createFile(current_directory)
def update_sensors(self, sensorValues):
self.attSensors = sensorValues
def get_sensor_value(self):
print(str(self.attSensors))
def matToString(self, matrix):
"""
:param matrix: The matrix to be turned into string
Returns a string of a matrix row by row, without brackets or commas
"""
r, c = matrix.shape
string = ""
for row in range(0, r):
string = string + strftime("%Y-%m-%d %H:%M:%S", gmtime()) + "\t"
for col in range(1, c):
string = string + str(int(matrix[row, col])) + "\t"
string += "\n"
return string
def openFile(self):
open(self.file, "w")
def checkNoiseArray(self, channels):
for i in range(6):
if (int(channels[i]) - int(self.prevData[i]) < self.threshold):
self.noise[i] = 0
else:
self.noise[i] = 1
self.prevData = channels
#print(self.noise)
def checkNoise(self, data):
data = self.matToString(data)
#print(data)
channels_list = data.split('\n')
for channels in channels_list:
channel = channels.split('\t')
if len(channel) > 1:
self.checkNoiseArray(channel[5:11])
#for channel in channels[2:]:
# print(channel)
def write(self, string_sample):
self.file.write(string_sample)
def closeFile(self):
self.file.close()
def main(self):
parser = argparse.ArgumentParser()
parser.add_argument("--sampling_rate",
help="Sampling rate used for recording data",
type=int,
default=10)
parser.add_argument("--offline",
help="run in offline mode",
action="store_true")
parser.add_argument("--logging",
dest="logging",
help="Log the data",
action="store_true",
default=True)
parser.add_argument("--no_logging",
dest='logging',
help="Log the data",
action="store_false")
parser.add_argument("--osc_path",
help="the osc path prefix",
default="Bitalino")
parser.add_argument("--dest_ip",
help="IP address of the destination",
default="127.0.0.1")
parser.add_argument("--dest_port",
help="the port",
type=int,
default=8000)
parser.add_argument("--mac_address", default="20:16:12:22:45:56")
parser.add_argument("--battery_threshold", default=30)
parser.add_argument("--analog_channels", default="0,1,2,3,4,5")
parser.add_argument("--batch_size",
help="number of samples read in batch",
type=int,
default=10)
parser.add_argument("--EDA_channel",
help="the analog channel inded of EXA",
type=int,
default=3)
args = parser.parse_args()
the_logger = log_writer(args.logging)
the_logger.log_msg("Starting up.")
# The channel list parsing is bit of a hack.. I'm sure there is some more pythonesque way of doing this
anal_channels = args.analog_channels.split(',')
channels = list(map(int, anal_channels))
# small samping rate for testing..
analogChannels = args.analog_channels
samplingRate = args.sampling_rate
nSamples = args.batch_size
# Connect to BITalino
device = BITalino(args.mac_address)
# Set battery threshold
batty = device.battery(args.battery_threshold)
# If we are not in offline mode we start streaming to given UDP port.
# He we just create a UDPClient for that.
if not args.offline:
client = udp_client.SimpleUDPClient(args.dest_ip, args.dest_port)
# Start recording
device.start(samplingRate, channels)
while self.interrupter == False:
# Start Acquisition
rec_data = device.read(nSamples)
current_time = datetime.datetime.now().timestamp()
for sample in rec_data:
# Delete digital channels (that contains just zeroes but that cannot be ignored)
# maybe this delete/insert thing is inefficient, but hopefully not inefficient enough
# to cause issues...
sample = np.delete(sample, [0, 1, 2, 3, 4])
sample = np.insert(sample, 0, current_time)
the_logger.log_data(sample)
current_time += (1.0 / samplingRate)
# Following code just for State of Darkness!! Does not generalize and will break if EDA is
# recorded from somewhere other than first channel.
EDA_data = np.mean(rec_data, axis=0)[(4 + args.EDA_channel)]
print("the EDA_data is: ", EDA_data)
osc_address = args.osc_path + "/EDA"
msg = osc_message_builder.OscMessageBuilder(address=osc_address)
msg.add_arg(EDA_data)
msg = msg.build()
if not args.offline:
client.send(msg)
# Stop acquisition
device.stop()
# Close connection
device.close()
return
class Opisense:
def __init__(self):
#TODO Implement a failure to connect condition.
#sudo hciconfig hci0 reset
failCounter = 0
print(time.strftime("%d %b %Y %H:%M:%S", time.gmtime()))
"""MAC Address for test device."""
self._macAddress = '98:D3:41:FD:4F:D9'
while not (self.__connect_bitalino()):
failCounter += 1
if failCounter > 5:
sys.exit('Unable to connect: Exiting.')
break
pass
"""Sampling rate of the device in Hz (samples per second)."""
self._sampleRate = 1000
"""Channels to acquire data from."""
self._acqChannels = [0, 1, 2, 3]
"""Initialize read status."""
self._canRead = False
def find_devices(self) -> list:
"""Search for nearby BITalino devices and return the MAC address of those found."""
localBITalinoMACs = [
device[0] for device in find() if 'BITalino' in device[1]
]
return localBITalinoMACs
def __connect_bitalino(self) -> bool:
"""Attempt to establish a connection w/ the BITalion hardware."""
try:
self._device = BITalino(macAddress='98:D3:41:FD:4F:D9')
#self._device = BITalino(macAddress=self._macAddress)
return True
except:
print('Error in establishing device connection. Trying again.')
return False
def start(self) -> None:
"""Start data collection by the device using the defined parameters."""
self._canRead = True
self._device.start(SamplingRate=self._sampleRate,
analogChannels=self._acqChannels)
def stop(self) -> None:
"""Stops data collection by the device."""
self._canRead = False
self._device.stop()
def __reset(self):
"""Initialize the instance variables for data recording."""
pass
def read_data(self) -> pd.DataFrame:
"""Reads data off of the device in 5.0s windows and casts it as a dataframe."""
if self._canRead:
rawData = self._device.read(5000)
rawCol = [
'channel_1_raw', 'channel_2_raw', 'channel_3_raw',
'channel_4_raw'
]
df = pd.DataFrame(columns=rawCol)
df.channel_1_raw = rawData[:, 5]
df.channel_2_raw = rawData[:, 6]
df.channel_3_raw = rawData[:, 7]
df.channel_4_raw = rawData[:, 8]
#print(time.strftime("%H:%M:%S", time.localtime()))
df['time'] = time.strftime("%H:%M:%S", time.localtime())
#df.set_index('time',inplace=True)
#print(df.head())
return df
else:
print(f'Device must be started.')
try:
# Connect to BITalino
device = BITalino(device)
except:
print("Error: cannot connect to BITalino")
exit()
# Read BITalino version
print((device.version()))
# Set battery threshold
device.battery(batterythreshold)
# Start Acquisition
device.start(fsample, channels)
# Turn BITalino led on
digitalOutput = [1,1]
device.trigger(digitalOutput)
startfeedback = time.time()
countfeedback = 0
print("STARTING STREAM")
while True:
# measure the time that it takes
start = time.time();
# read the selected channels from the bitalino
def _start():
"""Start the module
This uses the global variables from setup and adds a set of global variables
"""
global parser, args, config, r, response, patch, name
global monitor, debug, device, fsample, blocksize, channels, batterythreshold, nchans, startfeedback, countfeedback, ft_host, ft_port, ft_output, datatype, digitalOutput
# this can be used to show parameters that have changed
monitor = EEGsynth.monitor(name=name, debug=patch.getint("general", "debug"))
# get the options from the configuration file
debug = patch.getint("general", "debug")
device = patch.getstring("bitalino", "device")
fsample = patch.getfloat("bitalino", "fsample", default=1000)
blocksize = patch.getint("bitalino", "blocksize", default=10)
channels = patch.getint("bitalino", "channels", multiple=True) # these should be one-offset
batterythreshold = patch.getint("bitalino", "batterythreshold", default=30)
# switch from one-offset to zero-offset
nchans = len(channels)
for i in range(nchans):
channels[i] -= 1
monitor.info("fsample = " + str(fsample))
monitor.info("channels = " + str(channels))
monitor.info("nchans = " + str(nchans))
monitor.info("blocksize = " + str(blocksize))
try:
ft_host = patch.getstring("fieldtrip", "hostname")
ft_port = patch.getint("fieldtrip", "port")
monitor.success("Trying to connect to buffer on %s:%i ..." % (ft_host, ft_port))
ft_output = FieldTrip.Client()
ft_output.connect(ft_host, ft_port)
monitor.success("Connected to output FieldTrip buffer")
except:
raise RuntimeError("cannot connect to output FieldTrip buffer")
datatype = FieldTrip.DATATYPE_FLOAT32
ft_output.putHeader(nchans, float(fsample), datatype)
try:
# Connect to BITalino
device = BITalino(device)
monitor.success((device.version()))
except:
raise RuntimeError("cannot connect to BITalino")
# Set battery threshold
device.battery(batterythreshold)
# Start Acquisition
device.start(fsample, channels)
# Turn BITalino led on
digitalOutput = [1, 1]
device.trigger(digitalOutput)
startfeedback = time.time()
countfeedback = 0
# there should not be any local variables in this function, they should all be global
if len(locals()):
print("LOCALS: " + ", ".join(locals().keys()))
class BluetoothDataReceiver():
""" Creates a data receiver via Bitalino class object,
a configuration and a data buffer.
Keyword arguments:
receiver_configuration -- a BluetoothReceiverConfiguration object
which contains the receiver settings from a JSON file.
data_buffer -- A Queue through which the received data is
transmitted forward.
"""
def __init__(self, receiver_configuration, data_buffer):
self.__data_buffer = data_buffer
self.__receiver_configuration = receiver_configuration
self.__communication_queue = None
self.__receiver_thread = None
self.__bitalino_device = BITalino(receiver_configuration.macAddress)
self.t0 = None
def Start(self):
""" Starts an 'infinite loop' which will receive and transmit
data on a separate thread until the *Stop* method is called.
"""
# Creates a Bitalino object using the given receiver configuration
# and try to connect to the Bitalino device.
self.__bitalino_device.start(
self.__receiver_configuration.samplingRate,
self.__receiver_configuration.acqChannels)
if self.__receiver_thread is None:
self.__communication_queue = queue.Queue()
self.__receiver_thread = threading.Thread(
target=self.__receiver_loop, args=[])
self.__receiver_thread.start()
def __receiver_loop(self):
""" An 'infinite loop' which is stopped by *Stop* method. \n
This method will get the data received through the Bitalino
device and send further via data buffer.
"""
self.t0 = time.time()
while True:
if not self.__communication_queue.empty():
cmd = self.__communication_queue.get()
if isinstance(cmd, str) and cmd == 'quit':
break
data = self.__bitalino_device.read(
self.__receiver_configuration.nSamples)
self.__data_buffer.put(
(self.__receiver_configuration.macAddress[-5:].replace(
':', ''), data[:, 5]))
def Stop(self):
""" Stops the 'infinite loop' thread created by *Start* call.
"""
self.__communication_queue.put('quit')
self.__receiver_thread.join()
self.__bitalino_device.stop()
self.__bitalino_device.close()
self.__communication_queue = None
self.__receiver_thread = None
def main():
# OS Specific Initializations
clearCmd = "cls||clear"
if platform.system() == 'Windows':
clearCmd = "cls"
print("Using Windows default console size 80x24")
columns = 80
rows = 24
else:
clearCmd = "clear"
rows, columns = os.popen('stty size', 'r').read().split()
print("Connecting to BITalino...")
# Set MAC Address with argument
defaultMACAddress = "20:16:12:21:98:56"
if len(sys.argv) == 2:
macAddress = sys.argv[1]
print("Using address: " + macAddress)
elif len(sys.argv) > 1:
print("Please input only 1 argument, which is the address of the BITalino device.")
print("Running without argument will use default MAC Address = " + defaultMACAddress)
print("Exiting...")
exit()
else:
macAddress = defaultMACAddress
print("Using default MAC address: " + macAddress)
# Setting other attributes
batteryThreshold = 30
acqChannels = [0,1]
samplingRate = 100
nSamples = 20
digitalOutput = [1,1]
# Connect to BITalino
device = BITalino(macAddress)
# Set battery threshold
device.battery(batteryThreshold)
# Read BITalino version
os.system(clearCmd)
print("Device Version:" + device.version())
# Start Acquisition
device.start(samplingRate, acqChannels)
# Take baseline measurement
p1Base = []
p2Base = []
start = time.time()
end = time.time()
samplingTime = 15
print("Sampling for baseline...")
while (end - start) < samplingTime:
# Sampling for baseline
baseSample = device.read(nSamples)
p1Base.append(numpy.mean(baseSample[:,5]))
p2Base.append(numpy.mean(baseSample[:,6]))
end = time.time()
p1B = numpy.mean(p1Base)
p2B = numpy.mean(p2Base)
print("\n")
p1P = "Player 1 Baseline: " + str(p1B)
print(p1P)
p2P = "Player 2 Baseline: " + str(p2B)
print(p2P)
print("\n\n\n\n\n\n")
print("Are you ready for the game? Type 'No' to exit".center(int(columns)," "))
response = sys.stdin.readline().rstrip()
if response == "No":
sys.exit()
print("\n")
print("Starting Game...".center(int(columns), " "))
time.sleep(5)
# Start Game
os.system(clearCmd)
gameRunning = True
player1Progress = 28
while gameRunning:
# While not reaching runningTime, read samples
rawData = device.read(nSamples)
portA1 = rawData[:,5]
#print "Port A1: ", portA1
valueA1 = numpy.mean(portA1 - p1B)
#print "Value A1: ", valueA1
#print ""
portA2 = rawData[:,6]
#print "Port A2: ", portA2
valueA2 = numpy.mean(portA2 - p2B)
#print "Value A2: ", valueA2
#print "\n"
if (valueA2 - valueA1) > 10:
player1Progress-=1
elif (valueA2 - valueA1) > 20:
plater1Progress-=2
elif (valueA1 - valueA2) > 10:
player1Progress+=1
elif (valueA1 - valueA2) > 20:
player1Progress+=2
print("\n\n")
print("Player 1 Reading:".center(int(columns)," "))
print("\n")
print(str(valueA1).center(int(columns)," "))
print("\n\n\n")
print("*****************************I*****************************".center(int(columns)," "))
progress = "P1 *" + ' '*player1Progress + 'O' + ' '*(56-player1Progress) + '* P2'
print(progress.center(int(columns)," "))
print("*****************************I*****************************".center(int(columns)," "))
print("\n\n\n")
print("Player 2 Reading:".center(int(columns)," "))
print("\n")
print(str(valueA2).center(int(columns)," "))
time.sleep(0.2)
os.system(clearCmd)
if player1Progress == 0:
print("\n\n\n\n\n")
print("Player 1 has won".center(int(columns)," "))
gameRunning = False
elif player1Progress == 56:
print("\n\n\n\n\n")
print("Player 2 has won".center(int(columns)," "))
gameRunning = False
# Turn BITalino LED on
device.trigger(digitalOutput)
# Stop acquisition
device.stop()
# Close connection
device.close()
except IndexError:
raise Exception('No BITalino found using address {}'.format(args.bitalino))
chans = [1, 2] # ECG = 1, EDA = 2
fs = 100 # sampling rate
n_samples = 10 # how many samples to read from BITalino
session_id = int(args.session)
# Connect to BITalino
device = BITalino(device_address)
# Read BITalino version
print(device.version())
# Start Acquisition
device.start(fs, chans)
hr = HeartRate.HeartRate(fs, 32)
edr = SkinConductance.SkinConductance(fs, 20, 0.4, 20, 20)
osc_ip = args.osc_ip
osc_port = args.osc_port
print("connecting to osc server: {}:{}".format(osc_ip, osc_port))
client = OSCClient()
client.connect((osc_ip, osc_port))
ecg_ignore_beats = 5
ecg_last_rate = 0
ecg_rates = []
import pygame
import pygame.mixer
from pygame.locals import *
import sys
# ----------------------------------------
# デバイスの初期化
macAddress = "20:16:12:21:35:82" # MACアドレス
samplingRate = 1000 # サンプリングレート
acqChannels = [0] # 取得チャネル（A1）
nSamples = 100 # 取得サンプル数
device = BITalino(macAddress) # デバイスの取得
print(device.version())
device.start(samplingRate, acqChannels) # データ取得開始
# ----------------------------------------
# ----------------------------------------
# 信号の取得
def selected():
BITS = 10 # 信号のビット幅
VCC = 3.3 # 操作電圧
GAIN = 1009 # センサーゲイン
THRESHOLD = 0.3 # 閾値
data = device.read(nSamples)
emg = (((((data[:,5] / 2**BITS) - 1/2) * VCC) / GAIN) * 1000) # 単位変換（mV）
emg = np.abs(emg) # 絶対値
max_value = np.max(emg)
class Bitalino(Node):
"""BITalino driver.
This node connects to a BITalino device and streams data at a provided rate.
It is based on the original BITalino Python library, with some performance
improvements and careful timestamping.
Two output streams are provided. The default output is the data read from the
analog and digital channels. The ``o_offsets`` output provides continuous offsets
between the local time and the estimated device time. This enables drift correction
to be performed during post-processing, although no significant drift has been
observed during testing.
Attributes:
o (Port): BITalino data, provides DataFrame.
o_offsets (Port): Time offsets, provide DataFrame.
Args:
port (string): The serial port.
e.g. ``COM3`` on Windows; ``/dev/tty.bitalino-DevB`` on MacOS;
``/dev/ttyUSB0`` on GNU/Linux.
rate (int): The device rate in Hz.
Possible values: ``1``, ``10``, ``100``, ``1000``. Default: ``1000``.
channels (tupple): The analog channels to read from.
Default: ``('A1', 'A2', 'A3', 'A4', 'A5', 'A6')``.
Example:
.. literalinclude:: /../examples/bitalino.yaml
:language: yaml
Notes:
.. attention::
Make sure to set your graph rate to an high-enough value, otherwise the device
internal buffer may saturate, and data may be lost. A 30Hz graph rate is
recommended for a 1000Hz device rate.
"""
def __init__(self,
port,
rate=1000,
channels=("A1", "A2", "A3", "A4", "A5", "A6")):
# Check port
if not port.startswith("/dev/") and not port.startswith("COM"):
raise ValueError(f"Invalid serial port: {port}")
# Check rate
if rate not in (1, 10, 100, 1000):
raise ValueError(f"Invalid rate: {rate}")
# Check channels
unique_channels = set(channels)
analog_channels = ["A1", "A2", "A3", "A4", "A5", "A6"]
channels = []
for channel_num, channel_name in enumerate(analog_channels):
if channel_name in unique_channels:
channels.append(channel_num)
# Set column names
# Sequence number and numeric channels are always present
self.columns = ["SEQ", "I1", "I2", "O1", "O2"]
# Add required analog channels
for channel in channels:
self.columns.append(analog_channels[channel])
# Compute the sample size in bytes
self.channel_count = len(channels)
if self.channel_count <= 4:
self.sample_size = int(
np.ceil((12.0 + 10.0 * self.channel_count) / 8.0))
else:
self.sample_size = int(
np.ceil((52.0 + 6.0 * (self.channel_count - 4)) / 8.0))
# Connect to BITalino
try:
self.device = BITalino(port)
except UnicodeDecodeError:
# This can happen after an internal buffer overflow.
# The solution seems to power off the device and repair.
raise WorkerInterrupt("Unstable state. Could not connect.")
except Exception as e:
raise WorkerInterrupt(e)
# Set battery threshold
# The red led will light up at 5-10%
self.device.battery(30)
# Read BITalino version
self.logger.info(self.device.version())
# Read state and show battery level
# http://forum.bitalino.com/viewtopic.php?t=448
state = self.device.state()
battery = round(
1 + (state["battery"] - 511) * ((99 - 1) / (645 - 511)), 2)
self.logger.info("Battery: %.2f%%", battery)
# Start Acquisition
self.device.start(rate, channels)
# Initialize counters for timestamp indices and continuity checks
self.last_sample_counter = 15
self.time_device = np.datetime64(int(time.time() * 1e6), "us")
self.time_local = self.time_device
self.time_delta = np.timedelta64(int(1000 / rate), "ms")
# Set meta
self.meta = {"rate": rate}
def update(self):
# Send BITalino data
data, timestamps = self._read_all()
self.o.set(data, timestamps, self.columns, self.meta)
# Send time offsets
if len(timestamps) > 0:
offset = (self.time_local - self.time_device).astype(int)
self.o_offsets.set(
[[self.time_device, offset]],
[self.time_local],
["time_device", "time_offset"],
)
def _read_all(self):
"""Read all available data"""
# Make sure the device is in aquisition mode
if not self.device.started:
raise Exception(ExceptionCode.DEVICE_NOT_IN_ACQUISITION)
# We only support serial connections
if not self.device.serial:
raise Exception("Device must be opened in serial mode.")
# Check buffer size and limits
buffer_size = self.device.socket.in_waiting
if buffer_size == 1020:
# The device buffer can hold up to 1020 bytes
self.logger.warn(
"OS serial buffer saturated. Increase graph rate or decrease device rate."
)
# Compute the maximum number of samples we can get
sample_count = int(buffer_size / self.sample_size)
# Infer timestamps from sample count and rate
# Will fail dramatically if too much packets are lost
# Tests show that there is no significant drift during a 2-hour session
start = self.time_device
stop = start + self.time_delta * sample_count
self.time_device = stop
timestamps = np.arange(start, stop, self.time_delta)
self.time_local = np.datetime64(int(time.time() * 1e6), "us")
# Infer timestamps from local time and rate
# /!\ Not monotonic
# stop = np.datetime64(int(time.time() * 1e6), 'us')
# start = stop - (sample_count * self.time_delta)
# timestamps = np.arange(start, stop, self.time_delta)
# Read raw samples from device
raw = self.device.socket.read(sample_count * self.sample_size)
# Initialize the output matrix
data = np.full((sample_count, 5 + self.channel_count), np.nan)
# Parse the raw data
# http://bitalino.com/datasheets/REVOLUTION_MCU_Block_Datasheet.pdf
for sample_number in range(sample_count):
# Extract sample
start = sample_number * self.sample_size
stop = start + self.sample_size
sample = list(
struct.unpack(self.sample_size * "B ", raw[start:stop]))
# Is the sample corrupted?
crc = sample[-1] & 0x0F
sample[-1] = sample[-1] & 0xF0
x = 0
for i in range(self.sample_size):
for bit in range(7, -1, -1):
x = x << 1
if x & 0x10:
x = x ^ 0x03
x = x ^ ((sample[i] >> bit) & 0x01)
if crc != x & 0x0F:
self.logger.warn("Checksum failed.")
continue
# Parse sample
data[sample_number, 0] = sample[-1] >> 4
data[sample_number, 1] = sample[-2] >> 7 & 0x01
data[sample_number, 2] = sample[-2] >> 6 & 0x01
data[sample_number, 3] = sample[-2] >> 5 & 0x01
data[sample_number, 4] = sample[-2] >> 4 & 0x01
if self.channel_count > 0:
data[sample_number,
5] = ((sample[-2] & 0x0F) << 6) | (sample[-3] >> 2)
if self.channel_count > 1:
data[sample_number,
6] = ((sample[-3] & 0x03) << 8) | sample[-4]
if self.channel_count > 2:
data[sample_number, 7] = (sample[-5] << 2) | (sample[-6] >> 6)
if self.channel_count > 3:
data[sample_number,
8] = ((sample[-6] & 0x3F) << 4) | (sample[-7] >> 4)
if self.channel_count > 4:
data[sample_number,
9] = ((sample[-7] & 0x0F) << 2) | (sample[-8] >> 6)
if self.channel_count > 5:
data[sample_number, 10] = sample[-8] & 0x3F
# Did we miss any sample?
# Check for discontinuity in the internal sample counter, encoded to 4 bits.
sample_counter = data[sample_number, 0]
if sample_counter == self.last_sample_counter + 1:
pass
elif sample_counter == 0 and self.last_sample_counter == 15:
pass
else:
self.logger.warn("Missed sample.")
self.last_sample_counter = sample_counter
return data, timestamps
def terminate(self):
self.device.stop()
self.device.close()
class BITalinoProcess(Process):
"""
BITalino acquisition process.
"""
def __init__(self,
outQueue,
goFlag,
acqFlag,
mac=None,
channels=[0],
step=100,
SamplingRate=1000,
timeout=5,
bitCls=None):
# run parent __init__
super(BITalinoProcess, self).__init__()
# synchronization inputs
self.queue = outQueue
self.go = goFlag
self.acq = acqFlag
# BITalino settings
self.mac = mac
self.channels = channels
self.step = step
self.SamplingRate = int(SamplingRate)
if bitCls is None:
self.device = BITalino()
else:
self.device = bitCls()
# trigger stuff
c1, c2 = Pipe()
self._outerPipe = c1
self._innerPipe = c2
self._trigout = 2 * self.step / float(self.SamplingRate)
# timeout
self.timeout = timeout
@classmethod
def instaStart(cls, *args, **kwargs):
# do some class method magic here to instantiate and start the process
outQueue = Queue()
goFlag = Event()
goFlag.set()
acqFlag = Event()
p = cls(outQueue, goFlag, acqFlag, *args, **kwargs)
p.start()
return p, outQueue, goFlag, acqFlag
def _checkTrigger(self):
# check if there is a trigger to act on
if self._innerPipe.poll():
data = self._innerPipe.recv()
try:
mask = data['Mask']
except KeyError:
# report failure
self._innerPipe.send({'Ack': False})
else:
# trigger
self.device.trigger(mask)
# report success
self._innerPipe.send({'Ack': True})
def trigger(self, data=[0, 0, 0, 0]):
# act on digital outputs
if not self.acq.is_set():
return False
# send mask
self._outerPipe.send({'Mask': data})
# wait for ack
if self._outerPipe.poll(self._trigout):
out = self._outerPipe.recv()
return out['Ack']
else:
return False
def connect(self):
# connect to BITalino
if self.device.open(self.mac, self.SamplingRate):
time.sleep(1.5)
print "successful"
return True
else:
print "failed"
return False
def setup(self):
# setup bitalino
print "connecting to %s: " % self.mac
while self.go.is_set():
if self.connect():
return True
time.sleep(1.5)
return False
def on_start(self):
# run immediately after acquisition starts
pass
def exit(self):
# exit process
self.acq.clear()
self.go.clear()
def processData(self, data):
# process received data
# send data
self.queue.put(data)
def on_stop(self):
# run immediately before acquisition stops
pass
def run(self):
# main loop
# connect to device, proceed if successful
if self.setup():
while self.go.is_set():
# wait for acquisition flag
print "Waiting"
self.acq.wait(timeout=self.timeout)
if self.acq.is_set():
# start acquisition
self.device.start(self.channels)
# time.sleep(1)
print "acquiring"
self.on_start()
while self.acq.is_set():
# read data
data = self.device.read(self.step)
# process data
self.processData(data)
# check trigger
self._checkTrigger()
# clean up
self.on_stop()
self.queue.put('')
# stop acquisition
self.device.stop()
# print "blocked"
print "acquisition stopped"
# disconnect device
self.device.close()
print "disconnected"
print "MAC address (%s) is not defined..." %macAddress
print "connecting to BITalino(%s)..."
# Set battery threshold
device.battery(batteryThreshold)
# Read BITalino version
print device.version()
print "connected to BITalino(%s)" %macAddress
print "creating Signal stream..."
info = StreamInfo('BiTalino','BiTalino',+len(acqChannels),samplingRate,'float32','myuid34234');
# next make an outlet
outlet = StreamOutlet(info)
print"created Signal stream : %s" %info.name()
print("starting acquisition...")
# Start Acquisition
device.start(samplingRate, acqChannels)
# Read samples
while 1:
data=device.read(nSamples)
print data
outlet.push_sample(data[0][defaultChannel+1:])
# Turn BITalino led on
device.trigger(digitalOutput)
# Stop acquisition
device.stop()
# Close connection
outlet.close()
info.close()
device.close()