def __cal_flow_ratio(frame):
field = data_field.find_flow_ratio_field()
if len(frame) <= field.end_address:
return None
flow_ratio = math.byte_arr_convert_int(
frame[field.begin_address:field.end_address + 1])
return float(flow_ratio / 100.0)
def __cal_temperature(frame):
field = data_field.find_temperature_field()
if len(frame) <= field.end_address:
return None
temperature = math.byte_arr_convert_int(
frame[field.begin_address:field.end_address + 1])
return float(temperature / 10.0)
def __cal_power(frame):
field = data_field.find_power_field()
if len(frame) <= field.end_address:
return None
power = math.byte_arr_convert_int(
frame[field.begin_address:field.end_address + 1])
return power
def get_field_val(frame, opr_type):
"""
获取域值
:param frame:
:param opr_type:
:return:
"""
# 数据域在数组中开始的索引
__DATA_FIELD_BEGIN_INDEX = 4
# 数据域在数组中结束的索引
__DATA_FIELD_END_INDEX = 6
if opr_type == Operator.RECHARGE:
return math.byte_arr_convert_int(
frame[__DATA_FIELD_BEGIN_INDEX:__DATA_FIELD_END_INDEX])
elif opr_type == Operator.SET_FLOW_RATIO:
return math.byte_arr_convert_int(
frame[__DATA_FIELD_BEGIN_INDEX:__DATA_FIELD_END_INDEX]) / 100.0
elif opr_type == Operator.SET_METER_ADDRESS:
return math.byte_arr_convert_int(
frame[__DATA_FIELD_BEGIN_INDEX:__DATA_FIELD_END_INDEX])
def __cal_total_flow(frame):
int_field = data_field.find_total_flow_int_field()
float_field = data_field.find_total_flow_float_field()
res = 0.0
if len(frame) > int_field.end_address:
res += math.byte_arr_convert_int(
frame[int_field.begin_address:int_field.end_address + 1])
if len(frame) > float_field.end_address:
res += math.calculate_double(
frame[float_field.begin_address:float_field.end_address + 1])
return float(res)
def __cal_surplus_gas(frame):
"""
获取剩余气量
:param frame:
:return:
"""
field = data_field.find_surplus_gas_field()
if len(frame) <= field.end_address:
return None
surplus_gas = math.byte_arr_convert_int(
frame[field.begin_address:field.end_address + 1])
return surplus_gas