def move(self, stage1, stage2):
"""
Moves the stages with the specified values. Since GSC-02 is a half-step
stepping driver, 1 pulse corresponds to "half-step movement" in the
stage catalogues.
"""
if not (-16777214 <= stage1 <= 16777214):
raise exceptions.ValueError('stage1 must be between -16777214 and 16777214.')
if not (-16777214 <= stage2 <= 16777214):
raise exceptions.ValueError('stage2 must be between -16777214 and 16777214.')
command = 'M:W'
if stage1 >= 0:
command += '+P%d' % stage1
else:
command += '-P%d' % -stage1
if stage2 >= 0:
command += '+P%d' % stage2
else:
command += '-P%d' % -stage2
self.write(command)
self.go()
def setSpeed(self, minSpeed, maxSpeed, accelerationTime):
"""
Sets the movement speeds of the stages
minSpeed: Minimum speed (PPS)
maxSpeed: Maximum speed (PPS)
accelerationTime: Acceleration time to be taken from min to max (ms)
written by YK
"""
if not (1 <= minSpeed <= maxSpeed <= 500000):
raise exceptions.ValueError('Must be 1 <= minSpeed1 <= maxSpeed1 <= 500000.')
if not (0 <= accelerationTime <= 1000):
raise exceptions.ValueError('Must be 00 <= accelerationTime <= 1000.')
self.write('D:WS%dF%dR%dS%dF%dR%d' % (minSpeed, maxSpeed, accelerationTime, minSpeed, maxSpeed, accelerationTime))
def write(self, command):
btemp = command + '\r\n'
self.serial.write(btemp.encode())
"""
SHOT702 reply b'OK' or b'NG'
written by YK
"""
atemp = self.readline()
atemp = str(atemp).replace("'","")
atemp = atemp.replace('b','')
if atemp == 'NG':
raise exceptions.ValueError('Device was not accepted properly')
def create_subset_pulse(self, center_wl_nm, NPTS):
""" Create new pulse with smaller frequency span, centered at closest
grid point to center_wl_nm, with NPTS grid points and
frequency-grid values from this pulse. """
if NPTS >= self.NPTS:
raise exceptions.ValueError(
"New pulse must have fewer points than existing one.")
p = Pulse()
center_idx = np.argmin(abs(self.wl_nm - center_wl_nm))
# We want to reduce the frequency span, which means holding df fixed
# while reducing NPTS. The time window is 1/df, so this means holding
# the time window fixed as well.
p._frep_MHz = self.frep_MHz
p.set_center_wavelength_nm(self.wl_nm[center_idx])
p.set_time_window_ps(self.time_window_ps)
p.set_NPTS(NPTS)
idx1 = center_idx - (NPTS >> 1)
idx2 = center_idx + (NPTS >> 1)
p.set_AW(self.AW[idx1:idx2])
return p
def setSpeed(self, highspeed, minSpeed1, maxSpeed1, accelerationTime1,
minSpeed2, maxSpeed2, accelerationTime2):
"""
Sets the movement speeds of the stages
highspeed: If true, speed range is 50-20000, else 1-200
minSpeed1/2: Minimum speed (PPS)
maxSpeed1/2: Maximum speed (PPS)
accelerationTime1/2: Acceleration time to be taken from min to max (ms)
| _________ ... maximum speed (PPS)
| / \
| / \
| / \ ... minimum speed (PPS)
| | |
| | |
|__|______________|________
<-> acceleration time (ms)
<-> deceleration time (ms)
"""
if not highspeed:
if not (1 <= minSpeed1 <= maxSpeed1 <= 200):
raise exceptions.ValueError('Must be 1 <= minSpeed1 <= maxSpeed1 <= 200 in low speed range.')
if not (1 <= minSpeed2 <= maxSpeed2 <= 200):
raise exceptions.ValueError('Must be 1 <= minSpeed2 <= maxSpeed2 <= 200 in low speed range.')
else:
if not (50 <= minSpeed1 <= maxSpeed1 <= 20000):
raise exceptions.ValueError('Must be 50 <= minSpeed1 <= maxSpeed1 <= 20000 in high speed range.')
if not (50 <= minSpeed2 <= maxSpeed2 <= 20000):
raise exceptions.ValueError('Must be 50 <= minSpeed2 <= maxSpeed2 <= 20000 in high speed range.')
if not (0 <= accelerationTime1 <= 1000):
raise exceptions.ValueError('Must be 00 <= accelerationTime1 <= 1000.')
if not (0 <= accelerationTime2 <= 1000):
raise exceptions.ValueError('Must be 00 <= accelerationTime2 <= 1000.')
if highspeed:
self.write('D:2S%dF%dR%dS%dF%dR%d' % (minSpeed1, maxSpeed1, accelerationTime1, minSpeed2, maxSpeed2, accelerationTime2))
else:
self.write('D:1S%dF%dR%dS%dF%dR%d' % (minSpeed1, maxSpeed1, accelerationTime1, minSpeed2, maxSpeed2, accelerationTime2))
def setBaudRate(self, rate): # changed by YK
if rate in (38400):
self.__baudRate = rate
else:
raise exceptions.ValueError('Invalid buard rate %d was given. Must be chosen from 38400.' % rate)
def setBaudRate(self, rate):
if rate in (2400, 4800, 9600, 19200):
self.__baudRate = rate
else:
raise exceptions.ValueError('Invalid buard rate %d was given. Must be chosen from 2400/4800/9600/19200.' % rate)
def __get_w0(self):
r""" Return center angular frequency (THz) """
if self._centerfrequency is None:
raise exceptions.ValueError('Center frequency is not set.')
return 2.0 * np.pi * self._centerfrequency