def __init__(self,
dev_name='Dev1/ai0:1',
frame_rate=120,
lp_filt_freq=4,
lp_filt_order=3,
force_params='force_params.txt'):
# specific variables for this device to operate with
self.load_force_params(force_params)
self.dev_name = dev_name
self.task_handle = uInt32
self.ai_task_handle = self.task_handle(0)
self.num_channels = 4
self.points = 1
self.points_read = uInt32()
self.DAQ_data = np.zeros((self.points*self.num_channels), dtype=np.float64)
NIDAQ.DAQmxCreateTask("", ctypes.byref(self.ai_task_handle))
NIDAQ.DAQmxCreateAIVoltageChan(self.ai_task_handle, self.dev_name, '',
c.DAQmx_Val_Diff, MINIMUM, MAXIMUM,
c.DAQmx_Val_Volts, None)
NIDAQ.DAQmxStartTask(self.ai_task_handle)
# define data buffers and filters
self.volts_zero = np.array([0.0,0.0,0.0,0.0])
self.frame_rate = frame_rate
self.zero_time = int(0.25*frame_rate)
self.buffer_size = 3*frame_rate
self.volts_buffer = np.zeros((4, self.buffer_size))
self.force_buffer = np.zeros((4, self.buffer_size))
(self.butter_lowpass_rt_b,
self.butter_lowpass_rt_a) = gf.butter_lowpass(lp_filt_freq,
self.frame_rate,
lp_filt_order)
def __init__(self,
analog_in_chans='Dev5/ai0:1',
digital_out_chans='Dev5/port1/line0',
frame_rate=120,
lp_filt_freq=4,
lp_filt_order=3,
force_params='force_params.txt'):
# specific variables for this device to operate with
self.load_force_params(force_params)
self.ai_chans = analog_in_chans
self.do_chans = digital_out_chans
self.task_handle = uInt32
self.ai_task_handle = self.task_handle(0)
self.num_channels = 5
self.points = 1
self.points_read = uInt32()
self.DAQ_data = np.zeros((self.points*self.num_channels), dtype=np.float64)
NIDAQ.DAQmxCreateTask("", ctypes.byref(self.ai_task_handle))
NIDAQ.DAQmxCreateAIVoltageChan(self.ai_task_handle, self.ai_chans, '',
c.DAQmx_Val_Diff, MINIMUM, MAXIMUM,
c.DAQmx_Val_Volts, None)
NIDAQ.DAQmxStartTask(self.ai_task_handle)
self.do_task_handle = self.task_handle(0)
self.points_write = uInt32()
NIDAQ.DAQmxCreateTask('', ctypes.byref(self.do_task_handle))
NIDAQ.DAQmxCreateDOChan(self.do_task_handle, self.do_chans, '',
c.DAQmx_Val_ChanPerLine) # c.DAQmx_Val_ChanForAllLines
NIDAQ.DAQmxStartTask(self.do_task_handle)
self.set_digital_out(0)
# define data buffers and filters
self.volts_zero = np.array([0.0,0.0,0.0,0.0,0.0])
self.frame_rate = frame_rate
self.zero_time = int(0.25*frame_rate)
self.buffer_size = 3*frame_rate
self.volts_buffer = np.zeros((5, self.buffer_size))
self.force_buffer = np.zeros((5, self.buffer_size))
(self.butter_lowpass_rt_b,
self.butter_lowpass_rt_a) = gf.butter_lowpass(lp_filt_freq,
self.frame_rate,
lp_filt_order)
