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We need to deal with a range ('0-3' or '0:3'), a list ('0,1,2,3') and a single item
'''
# First we deal with a list
rep_cap_list = repeated_capability.split(',')
if len(rep_cap_list) > 1:
# We have a list so call ourselves again to let the iterable instance handle it
return _convert_repeated_capabilities(rep_cap_list, prefix)
# Now we deal with ranges
# We remove any prefix and change ':' to '-'
r = repeated_capability.strip().replace(prefix, '').replace(':', '-')
rc = r.split('-')
if len(rc) > 1:
if len(rc) > 2:
raise errors.InvalidRepeatedCapabilityError("Multiple '-' or ':'", repeated_capability)
start = int(rc[0])
end = int(rc[1])
if end < start:
rng = range(start, end - 1, -1)
else:
rng = range(start, end + 1)
return _convert_repeated_capabilities(rng, prefix)
# If we made it here, it must be a simple item so we remove any prefix and return
return [repeated_capability.replace(prefix, '').strip()]
Returns:
error_string (str): Extended error description. If errorString is NULL, then it is not large
enough to hold the entire error description. In this case, the return
value of _get_extended_error_info is the size that you should use
for _get_extended_error_info to return the full error string.
'''
error_string_ctype = None # case C050
error_string_size_ctype = _visatype.ViUInt32() # case S170
error_code = self._library.niTClk_GetExtendedErrorInfo(error_string_ctype, error_string_size_ctype)
errors.handle_error(self, error_code, ignore_warnings=True, is_error_handling=True)
error_string_size_ctype = _visatype.ViUInt32(error_code) # case S180
error_string_ctype = (_visatype.ViChar * error_string_size_ctype.value)() # case C060
error_code = self._library.niTClk_GetExtendedErrorInfo(error_string_ctype, error_string_size_ctype)
errors.handle_error(self, error_code, ignore_warnings=False, is_error_handling=True)
return error_string_ctype.value.decode(self._encoding)
method is most useful for finite data operations that you expect to
complete within a certain time.
Args:
sessions (list of (Driver Session or nitclk.SessionReference)): sessions is an array of sessions that are being synchronized.
timeout (float in seconds or datetime.timedelta): The amount of time in seconds that wait_until_done waits for the
sessions to complete. If timeout is exceeded, wait_until_done
returns an error.
'''
session_count_ctype = _visatype.ViUInt32(0 if sessions is None else len(sessions)) # case S160
sessions_ctype = get_ctypes_pointer_for_buffer(value=_converters.convert_to_nitclk_session_number_list(sessions, _visatype.ViSession), library_type=_visatype.ViSession) # case B520
timeout_ctype = _converters.convert_timedelta_to_seconds(timeout, _visatype.ViReal64) # case S140
error_code = self._library.niTClk_WaitUntilDone(session_count_ctype, sessions_ctype, timeout_ctype)
errors.handle_error(self, error_code, ignore_warnings=False, is_error_handling=False)
return
def _get_error_description(self, error_code):
'''_get_error_description
Returns the error description.
'''
try:
'''
It is expected for _get_error to raise when the session is invalid
(IVI spec requires GetError to fail).
Use _error_message instead. It doesn't require a session.
'''
error_string = self._get_extended_error_info()
return error_string
except errors.Error:
return "Failed to retrieve error description."
def _get_error_description(self, error_code):
'''_get_error_description
Returns the error description.
'''
try:
'''
It is expected for _get_error to raise when the session is invalid
(IVI spec requires GetError to fail).
Use _error_message instead. It doesn't require a session.
'''
error_string = self._get_extended_error_info()
return error_string
except errors.Error:
return "Failed to retrieve error description."
Each instance should return a list of strings, without prefix
- '0' --> ['0']
- 0 --> ['0']
- '0, 1' --> ['0', '1']
- 'ScriptTrigger0, ScriptTrigger1' --> ['0', '1']
- '0-1' --> ['0', '1']
- '0:1' --> ['0', '1']
- '0-1,4' --> ['0', '1', '4']
- range(0, 2) --> ['0', '1']
- slice(0, 2) --> ['0', '1']
- (0, 1, 4) --> ['0', '1', '4']
- ('0-1', 4) --> ['0', '1', '4']
- (slice(0, 1), '2', [4, '5-6'], '7-9', '11:14', '16, 17') -->
['0', '2', '4', '5', '6', '7', '8', '9', '11', '12', '13', '14', '16', '17']
'''
raise errors.InvalidRepeatedCapabilityError('Invalid type', type(arg))
Returns the library.Library singleton for nitclk.
'''
global _instance
global _instance_lock
with _instance_lock:
if _instance is None:
try:
library_type = _get_library_type()
if library_type == 'windll':
ctypes_library = ctypes.WinDLL(_get_library_name())
else:
assert library_type == 'cdll'
ctypes_library = ctypes.CDLL(_get_library_name())
except OSError:
raise errors.DriverNotInstalledError()
_instance = _library.Library(ctypes_library)
return _instance
def _get_error_description(self, error_code):
'''_get_error_description
Returns the error description.
'''
try:
'''
It is expected for _get_error to raise when the session is invalid
(IVI spec requires GetError to fail).
Use _error_message instead. It doesn't require a session.
'''
error_string = self._get_extended_error_info()
return error_string
except errors.Error:
return "Failed to retrieve error description."
that returned an error. To establish the method that returned an
error, use the return values of the individual methods because once
_get_extended_error_info reports an errorString, it does not report
an empty string again.
Returns:
error_string (str): Extended error description. If errorString is NULL, then it is not large
enough to hold the entire error description. In this case, the return
value of _get_extended_error_info is the size that you should use
for _get_extended_error_info to return the full error string.
'''
error_string_ctype = None # case C050
error_string_size_ctype = _visatype.ViUInt32() # case S170
error_code = self._library.niTClk_GetExtendedErrorInfo(error_string_ctype, error_string_size_ctype)
errors.handle_error(self, error_code, ignore_warnings=True, is_error_handling=True)
error_string_size_ctype = _visatype.ViUInt32(error_code) # case S180
error_string_ctype = (_visatype.ViChar * error_string_size_ctype.value)() # case C060
error_code = self._library.niTClk_GetExtendedErrorInfo(error_string_ctype, error_string_size_ctype)
errors.handle_error(self, error_code, ignore_warnings=False, is_error_handling=True)
return error_string_ctype.value.decode(self._encoding)
def _get_library_name():
try:
return ctypes.util.find_library(_library_info[platform.system()][platform.architecture()[0]]['name']) # We find and return full path to the DLL
except KeyError:
raise errors.UnsupportedConfigurationError