| 8 | |
| 9 | |
| 10 | class Graph: |
| 11 | def __init__(self, board_shim): |
| 12 | self.board_id = board_shim.get_board_id() |
| 13 | self.board_shim = board_shim |
| 14 | self.exg_channels = BoardShim.get_exg_channels(self.board_id) |
| 15 | self.sampling_rate = BoardShim.get_sampling_rate(self.board_id) |
| 16 | self.update_speed_ms = 50 |
| 17 | self.window_size = 4 |
| 18 | self.num_points = self.window_size * self.sampling_rate |
| 19 | |
| 20 | self.app = QtWidgets.QApplication([]) |
| 21 | self.win = pg.GraphicsLayoutWidget(title='BrainFlow Plot', size=(800, 600), show=True) |
| 22 | |
| 23 | self._init_timeseries() |
| 24 | |
| 25 | timer = QtCore.QTimer() |
| 26 | timer.timeout.connect(self.update) |
| 27 | timer.start(self.update_speed_ms) |
| 28 | QtWidgets.QApplication.instance().exec() |
| 29 | |
| 30 | def _init_timeseries(self): |
| 31 | self.plots = list() |
| 32 | self.curves = list() |
| 33 | for i in range(len(self.exg_channels)): |
| 34 | p = self.win.addPlot(row=i, col=0) |
| 35 | p.showAxis('left', False) |
| 36 | p.setMenuEnabled('left', False) |
| 37 | p.showAxis('bottom', False) |
| 38 | p.setMenuEnabled('bottom', False) |
| 39 | if i == 0: |
| 40 | p.setTitle('TimeSeries Plot') |
| 41 | self.plots.append(p) |
| 42 | curve = p.plot() |
| 43 | self.curves.append(curve) |
| 44 | |
| 45 | def update(self): |
| 46 | data = self.board_shim.get_current_board_data(self.num_points) |
| 47 | for count, channel in enumerate(self.exg_channels): |
| 48 | # plot timeseries |
| 49 | DataFilter.detrend(data[channel], DetrendOperations.CONSTANT.value) |
| 50 | DataFilter.perform_bandpass(data[channel], self.sampling_rate, 3.0, 45.0, 2, |
| 51 | FilterTypes.BUTTERWORTH_ZERO_PHASE, 0) |
| 52 | DataFilter.perform_bandstop(data[channel], self.sampling_rate, 48.0, 52.0, 2, |
| 53 | FilterTypes.BUTTERWORTH_ZERO_PHASE, 0) |
| 54 | DataFilter.perform_bandstop(data[channel], self.sampling_rate, 58.0, 62.0, 2, |
| 55 | FilterTypes.BUTTERWORTH_ZERO_PHASE, 0) |
| 56 | self.curves[count].setData(data[channel].tolist()) |
| 57 | |
| 58 | self.app.processEvents() |
| 59 | |
| 60 | |
| 61 | def main(): |