Esempio n. 1
0
class ScanningTRPLHistMapApp(wx.App):
    def OnInit(self):

        print "OnInit"

        self.HARDWARE_DEBUG = HARDWARE_DEBUG

        self.frame = ScanningSpectrumControlFrame(None)

        # Logged Quantities
        self.x_position = LoggedQuantity(
            name='x_position',
            dtype=np.float,
            display_textctrl=self.frame.m_textCtrl_current_x,
            input_textctrl=self.frame.m_textCtrl_set_current_x)
        self.y_position = LoggedQuantity(
            name='y_position',
            dtype=np.float,
            display_textctrl=self.frame.m_textCtrl_current_y,
            input_textctrl=self.frame.m_textCtrl_set_current_y)

        # Figure ###############################################################
        self.wxfig = MPLFigureWithToolbarWX(self.frame.m_panel_plot)
        self.fig = self.wxfig.fig
        self.ax = self.fig.add_subplot(111)

        # Spectrum Fig
        self.fig2 = pl.figure(2)
        self.ax_speclive = self.fig2.add_subplot(111)
        #self.c0_hist_line, = self.ax2.plot(np.zeros(HIST_LEN,dtype=float))
        #self.c1_hist_line, = self.ax2.plot(np.zeros(HIST_LEN,dtype=float))
        #self.hist_vline = self.ax2.axvline(0)
        #self.c0_hist = np.zeros(HIST_LEN,dtype=float)
        #self.c1_hist = np.zeros(HIST_LEN,dtype=float)
        self.fig2.show()
        #self.history_i = 0

        self.spec_plotline, = self.ax_speclive.plot(range(0, 512),
                                                    range(0, 512))

        ##################### hardware #########################################

        self.scanning = False

        ######## MCL NanoDrive Stage ###########################################
        self.nanodrive = MCLNanoDrive(debug=self.HARDWARE_DEBUG)
        try:
            self.frame.m_staticText_maxdim.SetLabel(
                "max: %g x %g um" %
                (self.nanodrive.cal[XAXIS_ID], self.nanodrive.cal[YAXIS_ID]))
        except Exception as e:
            print e
            self.frame.m_staticText_maxdim.SetLabel("max: ? x ? um")

        self.read_from_hardware()

        self.x_position.hardware_set_func = lambda x: self.nanodrive.set_pos_ax(
            x, XAXIS_ID)
        self.y_position.hardware_set_func = lambda y: self.nanodrive.set_pos_ax(
            y, YAXIS_ID)

        #Spectrometer ##########################################################
        self.spec = ActonSpectrometer(port=SPEC_COMM_PORT,
                                      debug=self.HARDWARE_DEBUG,
                                      dummy=False)

        print self.spec.read_grating_info()

        self.frame.m_choice_spec_grating.Clear()
        for gnum, gname in self.spec.gratings:
            self.frame.m_choice_spec_grating.Append("%i %s" % (gnum, gname))

        print self.spec.gratings_dict

        self.spec.read_grating()

        self.frame.m_choice_spec_grating.SetSelection(self.spec.grating - 1)

        self.spec.read_wl()

        self.frame.m_textCtrl_current_spec_wl.SetValue("%f" % self.spec.wl)

        self.frame.m_textCtrl_set_spec_wl.Bind(wx.EVT_TEXT_ENTER,
                                               self.on_change_spec_wl)
        self.frame.m_choice_spec_grating.Bind(wx.EVT_CHOICE,
                                              self.on_change_spec_grating)
        #self.frame.m_button_spec_stop.Bind(wx.EVT_BUTTON, self.on_spec_stop_motion)
        ########################################################################

        #Andor CCD##############################################################

        self.ccd = AndorCCD(debug=self.HARDWARE_DEBUG)

        print "Andor CCD"
        print "%g x %g" % (self.ccd.Nx, self.ccd.Ny)

        self.spectrum_length = self.ccd.Nx

        self.ccd.set_ro_image_mode()
        self.ccd.set_trigger_mode('internal')
        self.ccd.set_image_flip(ANDOR_HFLIP, ANDOR_VFLIP)
        print "flip", self.ccd.get_image_flip()
        self.ccd.set_ad_channel(ANDOR_AD_CHAN)
        self.ccd.set_exposure_time(1.0)
        self.ccd.set_EMCCD_gain(1)
        self.ccd.set_cooler_on()
        self.ccd.get_temperature()
        self.ccd.set_shutter_open()

        self.spec_fig = pl.figure(3)
        self.specimg_ax = self.spec_fig.add_subplot(111)
        self.spec_ax = self.spec_fig.add_subplot(611)
        self.spec_ax.set_xlim(0, 512)
        self.spec_fig.show()

        self.ccd_img = self.specimg_ax.imshow(np.zeros(
            (self.ccd.Nx, self.ccd.Ny), dtype=np.int32),
                                              origin='lower',
                                              interpolation='nearest')
        self.specimg_ax.axhline(ROW0, color='w')
        self.specimg_ax.axhline(ROW1, color='w')
        self.specimg_ax.axvline(256, color='w')

        self.spec_line, = self.spec_ax.plot(
            np.zeros(self.ccd.Nx, dtype=np.int32), 'k-')
        self.spec_line2, = self.spec_ax.plot(
            np.zeros(self.ccd.Nx, dtype=np.int32), 'g-')

        self.video_mode = False
        self.frame.m_button_video_mode_start.Bind(wx.EVT_BUTTON,
                                                  self.on_start_video_mode)
        self.frame.m_button_video_mode_stop.Bind(wx.EVT_BUTTON,
                                                 self.on_stop_video_mode)

        self.frame.m_textCtrl_andor_exposure.SetValue(
            str(ANDOR_DEFAULT_EXPOSURE))
        self.frame.m_textCtrl_andor_em.SetValue(str(ANDOR_DEFAULT_EMGAIN))

        # A/D rate

        choice_adc = self.frame.m_choice_andor_adc
        choice_adc.Clear()
        for speed in self.ccd.HSSpeeds[ANDOR_AD_CHAN]:
            choice_adc.Append("%g MHz" % (speed))

        choice_adc.SetSelection(0)
        self.ccd.set_hs_speed(0)

        choice_adc.Bind(wx.EVT_CHOICE, self.on_change_andor_adc)

        ########################################################################

        # update figure
        self.ax.set_xlim(0, self.nanodrive.cal[XAXIS_ID])
        self.ax.set_ylim(0, self.nanodrive.cal[YAXIS_ID])

        # events
        self.frame.Bind(wx.EVT_BUTTON, self.on_start_scan,
                        self.frame.m_button_start)
        self.frame.Bind(wx.EVT_BUTTON, self.on_stop_scan,
                        self.frame.m_button_stop)

        self.timer = wx.Timer(id=2001)
        self.timer.Bind(wx.EVT_TIMER, self.on_timer)

        self.timer.Start(2000)

        #self.fast_timer = wx.Timer(id=2002)
        #self.fast_timer.Bind(wx.EVT_TIMER, self.on_fast_timer)

        #self.frame.m_checkBox_picoharp_fastreadout.Bind(
        #                            wx.EVT_CHECKBOX, self.on_fast_timer_checkbox)

        self.update_display()
        self.frame.Show()
        return True

    def on_timer(self, e):
        self.read_from_hardware()
        self.update_display()


#    def on_fast_timer(self,e):
#        self.picoharp.read_count_rates()
#        self.frame.m_textCtrl_count0.SetValue(str(self.picoharp.Countrate0))
#        self.frame.m_textCtrl_count1.SetValue(str(self.picoharp.Countrate1))
#        self.c0_hist[self.hist_i] = self.picoharp.Countrate0
#        self.c1_hist[self.hist_i] = self.picoharp.Countrate1
#
#        #self.c0_hist_line.set_ydata(self.c0_hist)
#        self.c1_hist_line.set_ydata(self.c1_hist)
#        self.hist_vline.set_xdata([self.hist_i]*2)
#
#        self.history_i += 1
#        self.history_i %= HISTORY_LEN
#
#        if (self.hist_i % 10) == 0:
#            self.ax2.relim()
#            self.ax2.autoscale_view(scalex=False, scaley=True)
#            #self.ax2.autoscale()
#
#        self.fig2.canvas.draw()

    def on_fast_timer_checkbox(self, e):
        fast_timer_enable = self.frame.m_checkBox_picoharp_fastreadout.GetValue(
        )
        if fast_timer_enable:
            self.fast_timer.Start(100)
        else:
            self.fast_timer.Stop()

    def on_start_scan(self, e):
        print "start scan"

        self.scanning = True

        # get scan parameters:
        self.x0 = float(self.frame.m_textCtrl_x0.GetValue())
        self.x1 = float(self.frame.m_textCtrl_x1.GetValue())
        self.y0 = float(self.frame.m_textCtrl_y0.GetValue())
        self.y1 = float(self.frame.m_textCtrl_y1.GetValue())

        self.dx = float(self.frame.m_textCtrl_dx.GetValue()) / 1000.
        self.dy = float(self.frame.m_textCtrl_dy.GetValue()) / 1000.

        self.x_array = np.arange(self.x0, self.x1, self.dx, dtype=float)
        self.y_array = np.arange(self.y0, self.y1, self.dy, dtype=float)

        self.Nx = len(self.x_array)
        self.Ny = len(self.y_array)

        print "Nx, Ny", self.Nx, self.Ny

        self.andor_exposure = float(
            self.frame.m_textCtrl_andor_exposure.GetValue())
        self.andor_em_gain = int(self.frame.m_textCtrl_andor_em.GetValue())

        ### create data arrays
        self.integrated_count_map = np.zeros((self.Ny, self.Nx), dtype=int)
        self.spectrum_map = np.zeros((self.Ny, self.Nx, self.spectrum_length),
                                     dtype=int)

        print "shape:", self.integrated_count_map.shape, self.spectrum_map.shape

        ### update figure
        self.aximg = self.ax.imshow(
            self.integrated_count_map,
            origin='lower',
            vmin=1e4,
            vmax=1e5,
            interpolation='nearest',
            extent=[self.x0, self.x1, self.y0, self.y1])
        self.wxfig.redraw()

        # set up experiment
        self.ccd.set_exposure_time(self.andor_exposure)
        self.ccd.set_EMCCD_gain(self.andor_em_gain)

        # Scan!
        line_time0 = time.time()
        for jj in range(self.Ny):
            if not self.scanning:
                break
            y = self.y_array[jj]
            self.nanodrive.set_pos_ax(y, YAXIS_ID)
            self.read_from_hardware()
            y = self.ypos
            print "line time:", time.time() - line_time0
            print "pixel time:", float(time.time() - line_time0) / len(
                self.x_array)
            line_time0 = time.time()

            if jj % 2:  #odd lines
                x_line_indicies = range(self.Nx)
            else:  #even lines -- traverse in opposite direction
                x_line_indicies = range(self.Nx)[::-1]

            for ii in x_line_indicies:
                if not self.scanning:
                    break
                x = self.xpos = self.x_array[ii]
                wx.Yield()
                self.nanodrive.set_pos_ax(x, XAXIS_ID)

                self.ccd.start_acquisition()
                stat = "ACQUIRING"
                while stat != "IDLE":
                    wx_yielded_sleep(self.ccd.exposure_time * 0.25)
                    stati, stat = self.ccd.get_status()
                self.ccd.get_acquired_data()

                spectrum = np.sum(self.ccd.buffer[ROW0:ROW1], axis=0)

                self.spectrum_map[jj, ii, :] = spectrum

                self.integrated_count_map[jj, ii] = sum(spectrum)

                # update display
                try:
                    self.update_display()
                except Exception, err:
                    print "Failed to update_display", err

                try:
                    self.spec_plotline.set_ydata(spectrum)
                    self.ax_speclive.relim()
                    self.ax_speclive.autoscale_view(tight=None,
                                                    scalex=False,
                                                    scaley=True)
                    self.fig2.canvas.draw()
                except Exception as err:
                    print "Failed to update spectrum plot", err

                if not (ii % 5):
                    #self.update_figure()
                    try:
                        #print "updating figure"
                        #self.read_from_hardware()
                        self.aximg.set_data(self.integrated_count_map)
                        try:
                            count_min = np.min(
                                self.integrated_count_map[np.nonzero(
                                    self.integrated_count_map)])
                        except Exception as err:
                            count_min = 0
                        count_max = np.max(self.integrated_count_map)
                        self.aximg.set_clim(count_min, count_max + 1)
                        self.wxfig.redraw()
                    except Exception, err:
                        print "Failed to update figure:", err
Esempio n. 2
0
class ConfocalSpectrum3DScan(object):

    INPUT_PARAM_NAMES = """x0 x1 dx y0 y1 dy z0 z1 dz
                    t_exposure emgain ad_chan ad_hs_speed_index bin_row0 bin_row1
                    axis_scan_order mcl_axis_translation""".split()

    def __init__(self, **params):

        for p in self.INPUT_PARAM_NAMES:
            setattr(self, p, params[p])

        self.x_array = np.arange(self.x0, self.x1, self.dx, dtype=float)
        self.y_array = np.arange(self.y0, self.y1, self.dy, dtype=float)
        self.z_array = np.arange(self.z0, self.z1, self.dz, dtype=float)

        self.Nx = len(self.x_array)
        self.Ny = len(self.y_array)
        self.Nz = len(self.z_array)

        self.mcl_axis_translation = xyz_tuple(*self.mcl_axis_translation)

        self.HARDWARE_DEBUG = False

        #HARDWARE
        self.nanodrive = MCLNanoDrive(debug=self.HARDWARE_DEBUG)

        self.mono = ActonSpectrometer(port=SPEC_COMM_PORT,
                                      debug=self.HARDWARE_DEBUG,
                                      dummy=False)
        self.mono_grating = self.mono.read_grating()
        self.mono_wl = self.mono.read_wl()

        self.ccd = AndorCCD(debug=self.HARDWARE_DEBUG)
        print "Andor CCD"
        print "%g x %g" % (self.ccd.Nx, self.ccd.Ny)
        self.spectrum_length = self.ccd.Nx
        self.ccd.set_cooler_on()
        self.ccd.get_temperature()

        if SHOW_GRAPH:
            self.fig = pl.figure(1)
            self.ax = self.fig.add_subplot(111)
            self.spec_plotline, = self.ax.plot(np.ones(self.spectrum_length))
            self.fig.show()

        #DATA ARRAYS
        self.integrated_count_map = np.zeros((
            self.Nz,
            self.Ny,
            self.Nx,
        ),
                                             dtype=int)
        self.spec_map = np.zeros(
            (self.Nz, self.Ny, self.Nx, self.spectrum_length), dtype=np.int32)

    def run_3d_scan(self):

        self.ccd.set_ro_image_mode()
        self.ccd.set_trigger_mode('internal')
        self.ccd.set_image_flip(ANDOR_HFLIP, ANDOR_VFLIP)
        print "flip", self.ccd.get_image_flip()
        self.ccd.set_ad_channel(self.ad_chan)
        self.ccd.set_exposure_time(self.t_exposure)
        self.ccd.set_EMCCD_gain(self.emgain)
        self.ccd.set_cooler_on()
        self.ccd.get_temperature()
        self.ccd.set_shutter_open()
        self.ccd.set_hs_speed(self.ad_hs_speed_index)

        self.set_ijk = (-1, -1, -1)

        self.scanning = True

        time0 = time.time()

        for iii, ijk in enumerate(
                ijk_generator((self.Nx, self.Ny, self.Nz),
                              self.axis_scan_order)):

            #previous ijk
            ip, jp, kp = self.set_ijk

            # new ijk
            i, j, k = ijk

            # move stage
            if i != ip:
                x = self.x_array[i]
                self.nanodrive.set_pos_ax(x, self.mcl_axis_translation.x)
            if j != jp:
                y = self.y_array[j]
                self.nanodrive.set_pos_ax(y, self.mcl_axis_translation.y)
            if k != kp:
                z = self.z_array[k]
                self.nanodrive.set_pos_ax(z, self.mcl_axis_translation.z)

            self.set_ijk = ijk

            #t1 = time.time()
            self.read_from_hardware()
            #print "read_from_hardware (s)", time.time() - t1

            #t1 = time.time()
            self.ccd.start_acquisition()
            stat = "ACQUIRING"
            while stat != "IDLE":
                time.sleep(self.ccd.exposure_time * 0.1)
                stati, stat = self.ccd.get_status()
            self.ccd.get_acquired_data()
            #print "ccd acquire (s)", time.time() - t1

            spectrum = np.sum(self.ccd.buffer[self.bin_row0:self.bin_row1],
                              axis=0)

            self.spec_map[k, j, i, :] = spectrum

            cts = self.integrated_count_map[k, j, i] = sum(spectrum)

            if ((i + j + k) % 10) == 0:
                print ijk, cts
                t_now = time.time()
                pixel_time = (t_now - time0) * 0.1
                print "sec per pixel:", pixel_time, "| time remaining (s)", ((
                    (self.Nx * self.Ny * self.Nz) - iii) * pixel_time)
                time0 = t_now

            #if ((i + j + k) % 2) == 0 :
            if True:
                if SHOW_GRAPH:
                    self.spec_plotline.set_ydata(spectrum)
                    self.ax.relim()
                    self.ax.autoscale_view(tight=None,
                                           scalex=False,
                                           scaley=True)
                    self.fig.canvas.draw()

        #Finish up after scan
        print "saving data..."
        save_params = self.INPUT_PARAM_NAMES + [
            "spec_map", "Nx", "Ny", "Nz", "spectrum_length", "mono_grating",
            "mono_wl", "x_array", "y_array", "z_array", "integrated_count_map"
        ]
        save_dict = dict()
        for key in save_params:
            save_dict[key] = getattr(self, key)

        t0 = time.time()
        save_fname = "%i_spec_map3d.npz" % t0
        np.savez_compressed(save_fname, **save_dict)
        print "data saved as %s" % save_fname

    def read_from_hardware(self):

        pos = self.nanodrive.get_pos()

        self.xpos = pos[self.mcl_axis_translation.x - 1]
        self.ypos = pos[self.mcl_axis_translation.y - 1]
        self.zpos = pos[self.mcl_axis_translation.z - 1]
Esempio n. 3
0
class AndorCameraTestApp(wx.App):
    def OnInit(self):

        print "OnInit"

        self.HARDWARE_DEBUG = HARDWARE_DEBUG

        self.frame = SpectrumCameraControlFrame(None)

        #self.frame.m_panel_scanarea.Disable()

        # Figure
        self.wxfig = MPLFigureWithToolbarWX(self.frame.m_panel_plot)
        self.fig = self.wxfig.fig
        self.ax = self.fig.add_subplot(111)
        self.ax2 = self.fig.add_subplot(611)
        self.ax2.set_xlim(0, 512)

        #Spectrometer ##########################################################
        self.spec = ActonSpectrometer(port="COM4", debug=self.HARDWARE_DEBUG)

        print self.spec.read_grating_info()

        self.frame.m_choice_spec_grating.Clear()
        for gnum, gname in self.spec.gratings:
            self.frame.m_choice_spec_grating.Append("%i %s" % (gnum, gname))

        print self.spec.gratings_dict

        self.spec.read_grating()

        self.frame.m_choice_spec_grating.SetSelection(self.spec.grating - 1)

        self.spec.read_wl()

        self.frame.m_textCtrl_current_spec_wl.SetValue("%f" % self.spec.wl)

        self.frame.m_textCtrl_set_spec_wl.Bind(wx.EVT_TEXT_ENTER,
                                               self.on_change_spec_wl)
        self.frame.m_choice_spec_grating.Bind(wx.EVT_CHOICE,
                                              self.on_change_spec_grating)
        self.frame.m_button_spec_stop.Bind(wx.EVT_BUTTON,
                                           self.on_spec_stop_motion)
        ########################################################################

        #Andor CCD##############################################################

        self.ccd = AndorCCD(debug=self.HARDWARE_DEBUG)

        print "Andor CCD"
        print "%g x %g" % (self.ccd.Nx, self.ccd.Ny)

        self.ccd.set_ro_image_mode()
        self.ccd.set_trigger_mode('internal')
        self.ccd.set_exposure_time(1.0)
        self.ccd.set_EMCCD_gain(1)
        self.ccd.set_shutter_open()

        self.ccd_img = self.ax.imshow(np.zeros((self.ccd.Nx, self.ccd.Ny),
                                               dtype=np.int32),
                                      origin='lower',
                                      interpolation='nearest')
        self.spec_line, = self.ax2.plot(np.zeros(self.ccd.Nx, dtype=np.int32),
                                        'k-')
        self.spec_line2, = self.ax2.plot(np.zeros(self.ccd.Nx, dtype=np.int32),
                                         'g-')
        self.video_mode = False

        self.frame.m_button_video_mode_start.Bind(wx.EVT_BUTTON,
                                                  self.on_start_video_mode)
        self.frame.m_button_video_mode_stop.Bind(wx.EVT_BUTTON,
                                                 self.on_stop_video_mode)

        # A/D rate

        choice_adc = self.frame.m_choice_andor_adc
        choice_adc.Clear()
        for speed in self.ccd.HSSpeeds[AD_CHAN]:
            choice_adc.Append("%g MHz" % (speed))

        choice_adc.SetSelection(0)
        self.ccd.set_hs_speed(0)

        choice_adc.Bind(wx.EVT_CHOICE, self.on_change_andor_adc)

        ########################################################################

        self.timer = wx.Timer(id=2001)
        self.timer.Bind(wx.EVT_TIMER, self.on_timer)

        self.timer.Start(2000)

        self.fast_timer = wx.Timer(id=2002)
        self.fast_timer.Bind(wx.EVT_TIMER, self.on_fast_timer)

        #self.frame.m_checkBox_picoharp_fastreadout.Bind(
        #                            wx.EVT_CHECKBOX, self.on_fast_timer_checkbox)

        #self.update_display()
        self.frame.Show()
        return True

    def on_timer(self, e):
        try:
            temp = self.ccd.get_temperature()
            self.frame.m_textCtrl_andor_temp.SetValue(str(temp))
        except:
            print "failed to get temperature"

        #self.read_from_hardware()
        #self.update_display()

    def on_fast_timer(self, e):
        self.picoharp.read_count_rates()
        self.frame.m_textCtrl_count0.SetValue(str(self.picoharp.Countrate0))
        self.frame.m_textCtrl_count1.SetValue(str(self.picoharp.Countrate1))
        self.c0_hist[self.hist_i] = self.picoharp.Countrate0
        self.c1_hist[self.hist_i] = self.picoharp.Countrate1

        #self.c0_hist_line.set_ydata(self.c0_hist)
        self.c1_hist_line.set_ydata(self.c1_hist)
        self.hist_vline.set_xdata([self.hist_i] * 2)

        self.hist_i += 1
        self.hist_i %= HIST_LEN

        if (self.hist_i % 10) == 0:
            self.ax2.relim()
            self.ax2.autoscale_view(scalex=False, scaley=True)
            #self.ax2.autoscale()

        self.fig2.canvas.draw()

    def on_fast_timer_checkbox(self, e):
        fast_timer_enable = self.frame.m_checkBox_picoharp_fastreadout.GetValue(
        )
        if fast_timer_enable:
            self.fast_timer.Start(100)
        else:
            self.fast_timer.Stop()

    def read_from_hardware(self):
        self.picoharp.read_count_rates()

        self.ypos, self.xpos, z = self.nanodrive.get_pos()
        #self.xpos = self.lockinstage.getx()
        #self.ypos = self.lockinstage.gety()
        return self.xpos, self.ypos

    def update_display(self):
        #self.x_position.update_value(self.nanodrive.x_pos)
        #self.y_position.update_value(self.nanodrive.y_pos)

        self.x_position.update_value(self.xpos)
        self.y_position.update_value(self.ypos)

        self.frame.m_textCtrl_count0.SetValue(str(self.picoharp.Countrate0))
        self.frame.m_textCtrl_count1.SetValue(str(self.picoharp.Countrate1))

    def on_change_spec_wl(self, evt):
        self.spec_wl = float(self.frame.m_textCtrl_set_spec_wl.GetValue())
        self.frame.m_statusBar.SetStatusText(
            "Setting spectrometer wavelength to %f nm ..." % self.spec_wl)
        self.spec.write_wl_nonblock(self.spec_wl)
        wx.Yield()
        wx.Sleep(1)
        self.spec_done = False
        while not self.spec_done:
            self.spec_done = self.spec.read_done_status()
            self.spec_wl_current = self.spec.read_wl()
            self.frame.m_textCtrl_current_spec_wl.SetValue(
                "%f" % self.spec_wl_current)
            wx.Yield()
            wx.Sleep(1)
        self.frame.m_textCtrl_set_spec_wl.SetValue("")
        self.frame.m_statusBar.SetStatusText("Done setting Spectrometer")

    def on_change_spec_grating(self, evt):
        new_grating_index = self.frame.m_choice_spec_grating.GetSelection()
        gnum, gname = self.spec.gratings[new_grating_index]
        if self.HARDWARE_DEBUG:
            print "Moving spectrometer grating to %i %s (please wait until the move is complete)" % (
                gnum, gname)
        self.spec.write_grating(gnum)

    def on_spec_stop_motion(self, evt):
        pass

    def on_start_video_mode(self, evt):

        self.andor_exposure = float(
            self.frame.m_textCtrl_andor_exposure.GetValue())
        self.andor_em_gain = int(self.frame.m_textCtrl_andor_em.GetValue())

        self.ccd.set_exposure_time(self.andor_exposure)
        self.ccd.set_EMCCD_gain(self.andor_em_gain)

        self.frame.m_button_video_mode_start.Disable()
        self.frame.m_button_video_mode_stop.Enable(1)
        self.video_mode = True
        while self.video_mode:
            self.ccd.start_acquisition()
            stat = "ACQUIRING"
            while stat != "IDLE":
                wx_yielded_sleep(0.1)
                stati, stat = self.ccd.get_status()
            self.ccd.get_acquired_data()
            self.ccd_img.set_data(self.ccd.buffer)
            count_min = np.min(self.ccd.buffer)
            count_max = np.max(self.ccd.buffer)
            self.ccd_img.set_clim(count_min, count_max)

            self.spectra_data = np.average(self.ccd.buffer, axis=0)
            self.spectra_data2 = np.average(self.ccd.buffer[200:350], axis=0)

            self.spec_line.set_ydata(self.spectra_data)
            self.spec_line2.set_ydata(self.spectra_data2)

            self.ax2.relim()
            self.ax2.autoscale_view(scalex=False, scaley=True)

            self.wxfig.redraw()

    def on_stop_video_mode(self, evt):
        self.video_mode = False
        self.frame.m_button_video_mode_start.Enable(1)
        self.frame.m_button_video_mode_stop.Disable()

    # Andor CCD Events
    def on_change_andor_adc(self, evt):
        new_hs_speed_i = self.frame.m_choice_andor_adc.GetSelection()
        self.ccd.set_hs_speed(new_hs_speed_i)