HJ212_2017 协议字符串

#!/usr/bin/python3
# coding=utf-8
import time

'''
    由数据字典 生成 HJ212_2017 协议字符串
'''


def encode(DIC_HJ212_2017):
    _data = ''
    for key, value in DIC_HJ212_2017.items():
        if (key == 'CP'):
            _data += 'CP=&&'
            for cp_i, cp_item in DIC_HJ212_2017[key].items():
                for cp_key, cp_value in DIC_HJ212_2017[key][cp_i].items():
                    _data += cp_key + '=' + str(cp_value) + ','
                _data = _data[0:-1]
                _data += ';'
            _data = _data[0:-1]
            _data += '&&'
        else:
            _data += key + '=' + str(value) + ';'

    _head = '##'
    _length = len(_data)
    STR_HJ212_2017 = ''
    STR_HJ212_2017 += _head
    STR_HJ212_2017 += str(_length).zfill(4)
    STR_HJ212_2017 += _data
    STR_HJ212_2017 += str(crc16(_data)).zfill(4).upper();
    STR_HJ212_2017 += '\r\n'
    return STR_HJ212_2017


'''
    由HJ212_2017 协议字符串数据 生成 字典
'''


def decode(data):
    DIC_HJ212_2017 = {}
    DIC_HJ212_2017['HEAD'] = data[0:2]
    DIC_HJ212_2017['LENGTH'] = data[2:6]
    DIC_HJ212_2017['CRC'] = data[-6:-2]

    DIC_HJ212_2017['DATA'] = {}
    DIC_HJ212_2017['DATA']['CP'] = {}

    _d0 = data[6:-6].split('&&')

    _d1 = _d0[0][0:-4].split(';')
    for _d2 in _d1:
        _d3 = _d2.split('=')
        DIC_HJ212_2017['DATA'][_d3[0]] = _d3[1]

    _d4 = _d0[1].split(';')
    for _d5 in _d4:
        _d6 = _d5.split(',')
        for _d7 in _d6:
            _d8 = _d7.split('=')
            DIC_HJ212_2017['DATA']['CP'][_d8[0]] = _d8[1]
    _data = data[6:-6]

    if (int(DIC_HJ212_2017['LENGTH']) == len(_data)):
        print('数据长度验证通过')

    else:
        print('数据长度验证未通过')

    if (DIC_HJ212_2017['CRC'] == str(crc16(_data)).zfill(4).upper()):
        print('CRC校验通过')
    else:
        print('CRC校验未通过')

        # print(DIC_HJ212_2017)  调试输出 结构为双层字典，类似JAVA对象
    return DIC_HJ212_2017


'''
    crc16效验

'''


def crc16(text):
    data = bytearray(text, encoding='utf-8')
    crc = 0xffff
    dxs = 0xa001
    for i in range(len(data)):
        hibyte = crc >> 8
        crc = hibyte ^ data[i]
        for j in range(8):
            sbit = crc & 0x0001
            crc = crc >> 1
            if sbit == 1:
                crc ^= dxs
    return hex(crc)[2:]


'''
    QN=年月日时分秒毫秒
'''


def get_time_stamp():
    timestamp = time.time()
    local_time = time.localtime(timestamp)
    data_head = time.strftime("%Y%m%d%H%M%S", local_time)
    data_secs = (timestamp - int(timestamp)) * 1000
    dt_ms = "%s%03d" % (data_head, data_secs)
    # print(dt_ms)
    return dt_ms


# 自我测试
if __name__ == "__main__":
    data = '##0131QN=20210730012315231;ST=31;CN=2011;PW=123456;MN=V130427GDSJ001;Flag=4;CP=&&DataTime=20210730012315;avoc01-Rtd=0.021,avoc01-Flag=N&&1A40\r\n'
    # print('时间='+decode(data)['DATA']['CP']['DataTime'])
    print('数据,avoc01-Rtd=' + decode(data)['DATA']['CP']['avoc01-Rtd'])
    print('数据,avoc01-Flag=' + decode(data)['DATA']['CP']['avoc01-Flag'])
    print('时间,DataTime=' + decode(data)['DATA']['CP']['DataTime'])

    DIC_HJ212_2017 = {}
    DIC_HJ212_2017['QN'] = get_time_stamp()
    DIC_HJ212_2017['ST'] = '31'
    DIC_HJ212_2017['CN'] = '2011'
    DIC_HJ212_2017['PW'] = '123456'
    DIC_HJ212_2017['MN'] = 'V130427GDSJ001'
    DIC_HJ212_2017['Flag'] = '4'

    DIC_HJ212_2017['CP'] = {}

    DIC_HJ212_2017['CP'][0] = {}
    DIC_HJ212_2017['CP'][0]['DataTime'] = DIC_HJ212_2017['QN'][0:14]

    DIC_HJ212_2017['CP'][1] = {}
    DIC_HJ212_2017['CP'][1]['avoc01-Rtd'] = 0.021
    DIC_HJ212_2017['CP'][1]['avoc01-Flag'] = 'N'

    print(encode(DIC_HJ212_2017))