def decode(cls, data):
"""
Extracts and decodes the first Icom command found within the supplied buffer.
:param data: Series of bytes from which we must extract the incoming command. There is no guarantee
that the first byte is the beginning of the transaction (i.e. there might be some trash in the beginning).
:type data: array
:return: Object containing the transaction and some additional control information
:rtype: DecodedTransaction
"""
trans = bytearray(data)
# Find the beginning of the transaction
trans_start_index = trans.find(cls.TRANS_START)
if trans_start_index == -1:
return DecodedTransaction(None, 0)
# Find the end of the transaction (must be after trans_start_index)
trans_end_index = trans.find(cls.TRANS_END, trans_start_index)
if trans_end_index == -1:
return DecodedTransaction(None, 0)
cmd_idx = trans_start_index + 4 # get the index of the command
result_dic = dict()
if trans[cmd_idx] == cls.CFM_POSITIVE: # <------------------------- positive confirm
DecodedTransaction.insertPositiveCfm(result_dic)
elif trans[cmd_idx] == cls.CFM_NEGATIVE: # <------------------------- negative confirm
DecodedTransaction.insertNegativeCfm(result_dic)
elif trans[cmd_idx] == cls.SEND_FREQ: # <------------------------- frequency
freq = cls.__frequency_from_bcd_to_string(trans[(cmd_idx + 1):trans_end_index])
DecodedTransaction.insertFreq(result_dic, freq)
elif trans[cmd_idx] == cls.SEND_MODE: # <------------------------- mode
mode = cls.__mode_from_byte_to_string(trans[cmd_idx+1])
DecodedTransaction.insertMode(result_dic, mode)
else: # <------------------------- not-supported
DecodedTransaction.insertNotSupported(result_dic, misc_utils.getListInHex(trans[trans_start_index:trans_end_index+1]))
# Convert to JSON string
result_json = DecodedTransaction.toJson(result_dic)
logger.debug("input bytes: {0}".format(misc_utils.getListInHex(bytearray(data))))
logger.debug("returns: {0}; bytes removed: {1}".format(result_json, trans_end_index+1))
# return the object with the decoded transaction and the amount of bytes that we have read from the supplied buffer(string)
return DecodedTransaction(result_json, trans_end_index+1)
def __transaction(cls, command, sub_command=None, data=None):
"""
Assembles an Icom specific transaction ready to be send to the transceiver
Protocol is the following:
[preamble(0xFE), preamble(0xFE), ctrl_id, civ-address, command, sub_command, data...., 0xFD]
:param command: Command code. E.g. 0x05 is set frequency)
:type command: int
:param sub_command: Sub-command code (optional)
:type sub_command: int
:param data: Additional data bytes(optional)
:type data: list
:return: The ready transaction bytes
:rtype: list
"""
transaction= [0xFE, 0xFE, cls.CIV_ADDRESS, cls.CTRL_ADDRESS, command]
if sub_command is not None:
transaction.append(sub_command)
if data is not None:
transaction += data
transaction.append(0xFD)
logger.debug("returns: {0}".format(misc_utils.getListInHex(transaction)))
return transaction
import misc_utils aa = dict() aa["dfd"] = 1 print aa.__len__() my_list = [1, 2, 3, 4] my_byte_array = bytearray(my_list) print misc_utils.getListInHex(my_byte_array)