1、直接上代码
#!/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))
2、运行调试
解码出的字典，结构类似JAVA对象，按结构取值即可
