def _upload_file(ev3_obj, path_str):
handle = None
needs_continue = False
cmd = bytearray()
cmd.append(CommandType.SYSTEM_COMMAND_REPLY)
cmd.append(Command.BEGIN_UPLOAD)
message.append_u16(cmd, MAX_REPLY_BYTES)
message.append_str(cmd, path_str)
reply = ev3_obj.send_message_for_reply(cmd, 0)
if (reply[0] == ReplyType.SYSTEM_REPLY_ERROR):
raise SystemCommandError('A command failed.')
if (reply[1] != Command.BEGIN_UPLOAD):
raise SystemCommandError('Sync error detected.')
if (reply[2] == ReturnCode.UNKNOWN_ERROR):
raise SystemCommandError('An error occurred.')
data_size = message.parse_u32(reply, 3)
handle = reply[7]
result = reply[8:]
return (result, handle, (reply[2] != ReturnCode.END_OF_FILE))
def _continue_upload_file(ev3_obj, handle):
result = bytearray()
cmd = bytearray()
cmd.append(CommandType.SYSTEM_COMMAND_REPLY)
cmd.append(Command.CONTINUE_UPLOAD)
cmd.append(handle)
message.append_u16(cmd, MAX_REPLY_BYTES)
while (True):
reply = ev3_obj.send_message_for_reply(cmd, 1)
if (reply[0] == ReplyType.SYSTEM_REPLY_ERROR):
raise SystemCommandError('A command failed.')
if (reply[1] != Command.CONTINUE_UPLOAD):
raise SystemCommandError('Sync error detected.')
if (reply[2] == ReturnCode.UNKNOWN_ERROR):
raise SystemCommandError('An error occurred.')
handle = reply[3]
result.extend(reply[4:])
if (reply[2] == ReturnCode.END_OF_FILE):
break
return result
def _continue_list_files(ev3_obj, handle):
result = bytearray()
cmd = bytearray()
cmd.append(CommandType.SYSTEM_COMMAND_REPLY)
cmd.append(Command.CONTINUE_LIST_FILES)
cmd.append(handle)
message.append_u16(cmd, MAX_REPLY_BYTES)
while (True):
reply = ev3_obj.send_message_for_reply(cmd)
if (reply[0] == ReplyType.SYSTEM_REPLY_ERROR):
raise SystemCommandError('A command failed.')
if (reply[1] != Command.CONTINUE_LIST_FILES):
raise SystemCommandError('Sync error detected.')
if (reply[2] == ReturnCode.UNKNOWN_ERROR):
raise SystemCommandError('An error occurred.')
handle = reply[3]
result.extend(message.parse_str(reply, 4))
if (reply[2] == ReturnCode.END_OF_FILE):
break
return ''.join(result)
def write_mailbox(ev3_obj, mailbox_name_str, byte_seq):
"""Writes a sequence of bytes to the mailbox with the given name."""
if ('\0' != mailbox_name_str[-1]):
mailbox_name_str += '\0'
cmd = bytearray()
cmd.append(CommandType.SYSTEM_COMMAND_NO_REPLY)
cmd.append(Command.WRITEMAILBOX)
message.append_u8(cmd, len(mailbox_name_str))
message.append_str(cmd, mailbox_name_str)
message.append_u16(cmd, len(byte_seq))
cmd.extend(byte_seq)
ev3_obj.send_message(cmd)