def __get_resource_class(self):
try:
resource_class = \
vpp43.get_attribute(self.vi, VI_ATTR_RSRC_CLASS).upper()
except VisaIOError, error:
if error.error_code == VI_ERROR_NSUP_ATTR:
return None
else: raise
def __get_resource_class(self):
try:
resource_class = \
vpp43.get_attribute(self.vi, VI_ATTR_RSRC_CLASS).upper()
except VisaIOError, error:
if error.error_code == VI_ERROR_NSUP_ATTR:
return None
else: raise
def __get_stop_bits(self):
deci_bits = vpp43.get_attribute(self.vi, VI_ATTR_ASRL_STOP_BITS)
if deci_bits == 10:
return 1
elif deci_bits == 15:
return 1.5
elif deci_bits == 20:
return 2
def resource_class(self):
"""The resource class of the resource as a string."""
try:
resource_class = \
vpp43.get_attribute(self.vi, VI_ATTR_RSRC_CLASS).upper()
except VisaIOError as error:
if error.error_code != VI_ERROR_NSUP_ATTR:
raise
return resource_class # FIXME: local variable referenced before assignment
def stop_bits(self):
"""Number of stop bits contained in each frame (1, 1.5, or 2)."""
deci_bits = vpp43.get_attribute(self.vi, VI_ATTR_ASRL_STOP_BITS)
if deci_bits == 10:
return 1
elif deci_bits == 15:
return 1.5
elif deci_bits == 20:
return 2
def timeout(self):
"""The timeout in seconds for all resource I/O operations.
Note that the VISA library may round up this value heavily. I
experienced that my NI VISA implementation had only the values 0, 1, 3
and 10 seconds.
"""
timeout = vpp43.get_attribute(self.vi, VI_ATTR_TMO_VALUE)
if timeout == VI_TMO_INFINITE:
raise NameError("no timeout is specified")
return timeout / 1000.0
def __get_timeout(self):
timeout = vpp43.get_attribute(self.vi, VI_ATTR_TMO_VALUE)
if timeout == VI_TMO_INFINITE:
raise NameError, "no timeout is specified"
return timeout / 1000.0
def end_input(self):
"""indicates the method used to terminate read operations"""
return vpp43.get_attribute(self.vi, VI_ATTR_ASRL_END_IN)
def parity(self):
"""The parity used with every frame transmitted and received."""
return vpp43.get_attribute(self.vi, VI_ATTR_ASRL_PARITY)
def data_bits(self):
"""Number of data bits contained in each frame (from 5 to 8)."""
return vpp43.get_attribute(self.vi, VI_ATTR_ASRL_DATA_BITS)
def __get_timeout(self):
timeout = vpp43.get_attribute(self.vi, VI_ATTR_TMO_VALUE)
if timeout == VI_TMO_INFINITE:
raise NameError, "no timeout is specified"
return timeout / 1000.0
def __get_baud_rate(self):
return vpp43.get_attribute(self.vi, VI_ATTR_ASRL_BAUD)
def __get_data_bits(self):
return vpp43.get_attribute(self.vi, VI_ATTR_ASRL_DATA_BITS)
def __get_send_end(self):
return vpp43.get_attribute(self.vi, VI_ATTR_SEND_END_EN) == VI_TRUE
def __get_end_input(self):
return vpp43.get_attribute(self.vi, VI_ATTR_ASRL_END_IN)
def __get_parity(self):
return vpp43.get_attribute(self.vi, VI_ATTR_ASRL_PARITY)
def __get_data_bits(self):
return vpp43.get_attribute(self.vi, VI_ATTR_ASRL_DATA_BITS)
def __get_resource_name(self):
return vpp43.get_attribute(self.vi, VI_ATTR_RSRC_NAME)
def __get_parity(self):
return vpp43.get_attribute(self.vi, VI_ATTR_ASRL_PARITY)
def __get_resource_name(self):
return vpp43.get_attribute(self.vi, VI_ATTR_RSRC_NAME)
def __get_send_end(self):
return vpp43.get_attribute(self.vi, VI_ATTR_SEND_END_EN) == VI_TRUE
def __get_baud_rate(self):
return vpp43.get_attribute(self.vi, VI_ATTR_ASRL_BAUD)
def resource_name(self):
"""The VISA resource name of the resource as a string."""
return vpp43.get_attribute(self.vi, VI_ATTR_RSRC_NAME)
def __get_stop_bits(self):
deci_bits = vpp43.get_attribute(self.vi, VI_ATTR_ASRL_STOP_BITS)
if deci_bits == 10: return 1
elif deci_bits == 15: return 1.5
elif deci_bits == 20: return 2
def send_end(self):
"""Whether or not to assert EOI (or something equivalent after each
write operation.
"""
return vpp43.get_attribute(self.vi, VI_ATTR_SEND_END_EN) == VI_TRUE
def __get_end_input(self):
return vpp43.get_attribute(self.vi, VI_ATTR_ASRL_END_IN)
def baud_rate(self):
"""The baud rate of the serial instrument."""
return vpp43.get_attribute(self.vi, VI_ATTR_ASRL_BAUD)
