OpenBCI脑电使用教程（四）——用Python直接连接cyton板

一、安装brainflow库

BrainFlow 是一个用于获取、解析和分析来自生物传感器的 EEG、EMG、ECG 和其他类型数据的库（官网：BrainFlow）。其主要特点为：支持设备种类多、支持9种编程语言、包含信号处理功能

通过pip安装

pip install brainflow

二、代码解析

先放上官方的示例

import argparse
import time

from brainflow.board_shim import BoardShim, BrainFlowInputParams, BoardIds


def main():
    BoardShim.enable_dev_board_logger()

    parser = argparse.ArgumentParser()
    # use docs to check which parameters are required for specific board, e.g. for Cyton - set serial port
    parser.add_argument('--timeout', type=int, help='timeout for device discovery or connection', required=False,
                        default=0)
    parser.add_argument('--ip-port', type=int, help='ip port', required=False, default=0)
    parser.add_argument('--ip-protocol', type=int, help='ip protocol, check IpProtocolType enum', required=False,
                        default=0)
    parser.add_argument('--ip-address', type=str, help='ip address', required=False, default='')
    parser.add_argument('--serial-port', type=str, help='serial port', required=False, default='')
    parser.add_argument('--mac-address', type=str, help='mac address', required=False, default='')
    parser.add_argument('--other-info', type=str, help='other info', required=False, default='')
    parser.add_argument('--serial-number', type=str, help='serial number', required=False, default='')
    parser.add_argument('--board-id', type=int, help='board id, check docs to get a list of supported boards',
                        required=True)
    parser.add_argument('--file', type=str, help='file', required=False, default='')
    parser.add_argument('--master-board', type=int, help='master board id for streaming and playback boards',
                        required=False, default=BoardIds.NO_BOARD)
    args = parser.parse_args()

    params = BrainFlowInputParams()
    params.ip_port = args.ip_port
    params.serial_port = args.serial_port
    params.mac_address = args.mac_address
    params.other_info = args.other_info
    params.serial_number = args.serial_number
    params.ip_address = args.ip_address
    params.ip_protocol = args.ip_protocol
    params.timeout = args.timeout
    params.file = args.file
    params.master_board = args.master_board

    board = BoardShim(args.board_id, params)
    board.prepare_session()
    board.start_stream ()
    time.sleep(10)
    # data = board.get_current_board_data (256) # get latest 256 packages or less, doesnt remove them from internal buffer
    data = board.get_board_data()  # get all data and remove it from internal buffer
    board.stop_stream()
    board.release_session()

    print(data)


if __name__ == "__main__":
    main()

这个示例是一个通用的模板，连接任何板子只需在这一句代码中传入板子的ID和相应的参数即可

board = BoardShim(args.board_id, params)

所以，将上面的代码精简后，得到仅用于连接cyton板的代码是（我用的是第三方的cyton平替板BCIkit，通过WiFi连接的，如果是USB的话需要配置serial_port，board id要改成BoardIds.CYTON_BOARD）

import time
from brainflow.board_shim import BoardShim, BrainFlowInputParams, BoardIds


def main():
    BoardShim.enable_dev_board_logger()

    params = BrainFlowInputParams()
    params.ip_port = 6677
    params.ip_address = '192.168.4.1'
    params.ip_protocol = 3
    params.timeout = 10

    board = BoardShim(BoardIds.CYTON_WIFI_BOARD, params)
    board.prepare_session()
    board.start_stream ()
    time.sleep(10)
    # data = board.get_current_board_data (256) # get latest 256 packages or less, doesnt remove them from internal buffer
    data = board.get_board_data()  # get all data and remove it from internal buffer
    board.stop_stream()
    board.release_session()

    print(data)
    print(data.shape)


if __name__ == "__main__":
    main()

三、运行代码