def __init__(self, number, head=True):
"""
:param number - the number of protocol
:param head - flag for init header
"""
Base.__init__(self)
self.header = head
self.add_bits = '00000'
# message types, see ELM spec. page 44
self.mess_SF = 0 # the Single Frame
self.mess_FF = 1 # the First Frame (of a multi frame message)
self.mess_CF = 2 # the Consecutive Frame
# The header bits depends on protocol number.
# It uses for CAN protocol only
self.header_bits = self.__get_bits(number)
self.header_11 = 11
self.header_29 = 29
self.frame_start = 10
self.data_start_byte = 4
def __init__(self, head=True):
Base.__init__(self)
self.header = head
self.check_sum = -2
