brainflow/emulator/brainflow_emulator/galea_manual_v4.py at cda4358181bbc3ec950485ae57fceba2dbaf00da · brainflow-dev/brainflow · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
import enum
import logging
import random
import socket
import struct
import time


class State(enum.Enum):
    wait = 'wait'
    stream = 'stream'


class Message(enum.Enum):
    start_stream = b'b'
    stop_stream = b's'
    ack_values = (b'd', b'~6', b'~5', b'~4', b'o', b'F0')
    ack_from_device = b'A'
    time_calc_command = b'F4444444'


class GaleaEmulator(object):

    def __init__(self):
        self.local_ip = '127.0.0.1'
        self.local_port = 2390
        self.server_socket = socket.socket(family=socket.AF_INET, type=socket.SOCK_DGRAM)
        self.server_socket.bind((self.local_ip, self.local_port))
        self.state = State.wait.value
        self.addr = None
        self.package_num = 0
        self.transaction_size = 12
        self.package_size = 114
        self.server_socket.settimeout(.0001)
        self.channel_on_off = [1] * 24
        self.channel_identifiers = [
            '1', '2', '3', '4', '5', '6', '7', '8',
            'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',
            'A', 'S', 'D', 'G', 'H', 'J', 'K', 'L'
        ]

    def run(self):
        start_time = time.time()
        while True:
            try:
                msg, self.addr = self.server_socket.recvfrom(128)
                if msg == Message.start_stream.value:
                    self.state = State.stream.value
                elif msg == Message.stop_stream.value:
                    self.state = State.wait.value
                elif msg.decode('utf-8').startswith('~'):
                    self.server_socket.sendto(Message.ack_from_device.value, self.addr)
                    self.process_sampling_rate(msg.decode('utf-8'))
                elif msg in Message.ack_values.value or msg.decode('utf-8').startswith('x'):
                    self.server_socket.sendto(Message.ack_from_device.value, self.addr)
                    self.process_channel_on_off(msg.decode('utf-8'))
                elif msg in Message.ack_values.value or msg.decode('utf-8').startswith('z'):
                    self.server_socket.sendto(Message.ack_from_device.value, self.addr)
                elif msg == Message.time_calc_command.value:
                    cur_time = time.time()
                    resp = bytearray(struct.pack('d', (cur_time - start_time) * 1000))
                    self.server_socket.sendto(resp, self.addr)
                else:
                    if msg:
                        # we dont handle board config characters because they dont change package format
                        logging.warn('received unexpected string %s', str(msg))
            except socket.timeout:
                logging.debug('timeout for recv')

            if self.state == State.stream.value:
                transaction = list()
                for t in range(self.transaction_size):
                    single_package = list()
                    channel = 0
                    for i in range(self.package_size):
                        if (i > 4 and i < 77):
                            sample = i - 4
                            if (sample % 3 == 1):
                                channel += 1
                            if (self.channel_on_off[channel - 1] == 1):
                                if (sample % 3 == 2):
                                    single_package.append(random.randint(0, 8 + (channel * 2)))
                                else:
                                    single_package.append(0)
                            else:
                               single_package.append(0)
                        else:
                            single_package.append(random.randint(0, 255))
                    single_package[0] = self.package_num

                    cur_time = time.time()
                    timestamp = bytearray(struct.pack('d', (cur_time - start_time) * 1000))
                    eda = bytearray(struct.pack('f', .5))
                    ppg_red = bytearray(struct.pack('i', int(random.random() * 5000)))
                    ppg_ir = bytearray(struct.pack('i', int(random.random() * 5000)))

                    for i in range(88, 96):
                        single_package[i] = timestamp[i - 88]
                    for i in range(1, 5):
                        single_package[i] = eda[i - 1]
                    for i in range(84, 88):
                        single_package[i] = ppg_ir[i - 84]
                    for i in range(80, 84):
                        single_package[i] = ppg_red[i - 80]
                    single_package[77] = random.randint(0, 100)

                    self.package_num = self.package_num + 1
                    if self.package_num % 256 == 0:
                        self.package_num = 0
                    transaction.append(single_package)
                try:
                    package = list()
                    for i in range(self.transaction_size):
                        package.extend(bytes(transaction[i]))
                    self.server_socket.sendto(bytes(package), self.addr)
                except socket.timeout:
                    logging.info('timeout for send')
                time.sleep(0.001)


    def process_channel_on_off(self, msg):
        if msg.startswith('x'):
            for channel_id in self.channel_identifiers:
                channel_num = self.channel_identifiers.index(channel_id)
                if (msg[1] == channel_id):
                    if (msg[2] == '0'): # 0 is off (or Power Down), 1 is on
                        self.channel_on_off[channel_num] = 1
                        logging.info('channel '+ str(channel_num + 1) + ' is on')
                    else:
                        self.channel_on_off[channel_num] = 0
                        logging.info('channel ' + str(channel_num + 1) + ' is off')

    def process_sampling_rate(self, msg):
        if (msg[1] == '6'):
            logging.info('sampling rate is 250Hz')
        elif (msg[1] == '5'):
            logging.info('sampling rate is 500Hz')
        elif (msg[1] == '4'):
            logging.info('sampling rate is 1000Hz')
        else:
            logging.warning(f'did not recognize sampling rate command: {msg}')

def main():
    emulator = GaleaEmulator()
    emulator.run()


if __name__ == '__main__':
    logging.basicConfig(format='%(asctime)s %(levelname)-8s %(message)s', level=logging.INFO)
    main()