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Implement READ_MULTIPLE

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This commit is contained in:
Andrew Kay
2019-12-22 14:59:42 -06:00
parent 99e660ce71
commit ff2a2de575
2 changed files with 64 additions and 5 deletions
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13
pycoax/coax/protocol.py
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@@ -232,9 +232,12 @@ def read_data(interface, **kwargs):
return _execute_read_command(interface, command_word, **kwargs)
def read_multiple(interface):
def read_multiple(interface, **kwargs):
"""Execute a READ_MULTIPLE command."""
raise NotImplementedError
command_word = _pack_command_word(Command.READ_MULTIPLE)
return _execute_read_command(interface, command_word, 32,
validate_response_length=False, **kwargs)
def reset(interface):
"""Execute a RESET command."""
@@ -299,15 +302,15 @@ def diagnostic_reset(interface):
raise NotImplementedError
def _execute_read_command(interface, command_word, response_length=1,
allow_trta_response=False, trta_value=None,
unpack_data_words=True, **kwargs):
validate_response_length=True, allow_trta_response=False,
trta_value=None, unpack_data_words=True, **kwargs):
"""Execute a standard read command."""
response = interface.execute(command_word, response_length=response_length, **kwargs)
if allow_trta_response and len(response) == 1 and response[0] == 0:
return trta_value
if len(response) != response_length:
if validate_response_length and len(response) != response_length:
(_, command) = _unpack_command_word(command_word)
raise ProtocolError(f'Expected {response_length} word {command.name} response')