2018-09-12
Author: 楚格
IDE： Pycharm2018.02 Python 3.7
KeyWord : CAN模块
Explain:
多级选择，后续待优化
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__all__ = [] import sys import os import re import string import binascii import array import signal from time import sleep import serial import time import pprint from collections import OrderedDict # 字典元素有序排列 # ========================================= ''' # ------------------------------------------ # 导入：本文件夹中 .py 模块 # 直接引用模块名称 # ------------------------------------------ ''' #preject module from Testing_CRC import * ''' # ====================================== # 串口读取 # ====================================== ''' global MAX_LOOP_NUM global newCmd MAX_LOOP_NUM = 0 #======================================================== ''' # ====================================== # 输入函数 函数 # ====================================== ''' # def Input_AT_CMD(AT_CMD): # print('输入函数 Input_AT_CMD') # # print('AT_CMD :', len(AT_CMD), type(AT_CMD), AT_CMD) # AT_CMD_Handle = AT_CMD # # result = AT_CMD_Handle # # return AT_CMD_Handle ''' # ====================================== # 校验函数 函数 # ====================================== ''' def Modbus_CRC(): print('校验函数 Modbus CRC') global crc_value # ======================================================== # 输入列表值 字节 临时 Local_AT = 2 if Local_AT == 1 : # 测试 crc_value = [0x01, 0x04, 0x13, 0x87, 0x00, 0x30] elif Local_AT == 2 : # SN crc_value = [0x01, 0x04, 0x13, 0x7e, 0x00, 0x0A] else: print('AT指令超出范围') # crc_value = AT_crc # CRC 校验 添加校验码 crc_transformation = CalCRC16(crc_value, len(crc_value)) # 核心步骤 print('crc_transformation: ',crc_transformation, type(crc_transformation)) # Int没有Len crc_calculation = hex(crc_transformation) print('crc_calculation : ',crc_calculation, type(crc_calculation)) # 注意添加先后顺序 先低 后高 crc_value.append(int(hex(crc_transformation & 0xFF), 16)) crc_value.append(int(hex((crc_transformation >> 8) & 0xFF), 16)) print('crc_value : ',len(crc_value), type(crc_value), crc_value) # calculation value CRC ''' # 本区域是上述语句的分解 # tasd = [0x00, 0x00] # 申明 初始化变量 # tasd[0] = crc_transformation & 0xFF # tasd[1] = (crc_transformation >> 8) & 0xFF # H = hex(tasd[0]) # L = hex(tasd[1]) # H_value = int(H, 16) # L_value = int(L, 16) # crc_value.append(H_value) # crc_value.append(L_value) ''' print(' ') # ======================================================== # CRC 校验再次检查 CRC_Check = CheckCRC(crc_value, len(crc_value),0) if CRC_Check == 1: print('Result :', CRC_Check) # check calculation value print('CRC_Check : Right') else: print('Result :', CRC_Check) # check calculation value print('CRC_Check : wrong') print(' ') # ======================================================== # 返回添加后的CRC值 return crc_value # ======================================================== ''' # ====================================== # 串口设置 函数 # ====================================== ''' def Serial_info(): print('串口初始化 Serial_info') #----------------------------- global ser, band Local_func =True while Local_func: print("默认请输入：1 重新输入为：2") default = input('您的请选择： ') if default == "1": ser = serial.Serial(port="COM5", baudrate=115200, timeout=1) # 端口控制 Local_func = False # 结束执行 elif default == "2": port = input('串口号(数字)： ', ) # 查看端口号 Local_xuhao = True while Local_xuhao: print('可选波特率：1 = 9600 2 = 115200') band = input('波特率序号： ') if band == "1": band = 9600 Local_xuhao = False elif band == "2": band = 115200 Local_xuhao = False else: print('超出范围：请重新选择波特率！') Local_xuhao = True # 组装成串口初设信息 ser = serial.Serial(port="COM" + port, baudrate=band, timeout=1) # 端口控制 Local_func = False # 结束执行 else: print('超出选择范围，请重新选择序号！') Local_func = True #返回继续执行 # AT = 'Slave:GetConfig' # AT = bytearray([0x01,0x04,0x13,0x87,0x00,0x30,0x44,0xB3]) # AT = bytes([0x01,0x04,0x13,0x87,0x00,0x30,0x44,0xB3]) # AT = bytearray(crc_value) AT = bytes(crc_value) sendAT_Cmd(ser, AT, 1) ''' # ====================================== # 发送指令 函数 # ====================================== ''' def sendAT_Cmd(serInstance, atCmdStr, waitforOk): print('发送指令函数 send_cmd') #--------------------------- # print("Instance: %s" % serInstance) # 打开串口的信息 print("Command : %s" % atCmdStr) # 发送的指令 print("Port :",ser.port) # 端口号 # 判断是字符串还是字节 # or define b'string',bytes should be used not str # serInstance.write(atCmdStr.encode('utf-8')) # in_bytes = atCmdStr.encode(atCmdStr) serInstance.write(atCmdStr) if (waitforOk == 1): waitForCmdOKRsp() # else: # waitForCmdRsp() ''' # ====================================== # 等待回复 函数 # ====================================== ''' def waitForCmdOKRsp(): print('等待回复函数 waitForCmdOKRsp') #---------------------------------- maxloopNum = 0 global Reveice_Value while True: line = ser.readline() # 读取全部内容 print("Len :", len(line)," Type :", type(line)," Rsponse : %s" % line) aa = line.hex() # 字节变成字符串 print("Len :",len(aa),type(aa),aa) az = aa.split(" ") # 字符串变成列表元素 print("Len :",len(az),type(az),az) print(' ') # try: # # print("Rsponse : %s" % line) # 字节 # except: # print('出现异常') #======= 选择接受次数 ========= # maxloopNum = maxloopNum + 1 # if (re.search(b'OK', line)): # break # elif (maxloopNum > MAX_LOOP_NUM): # sys.exit(0) # ============================ Reveice_Value = aa Handle_Reveice() # result = Reveice_Value # return Reveice_Value ''' # ====================================== # 等待回复 函数 # ====================================== ''' def Handle_Reveice(): print('Handle_Reveice') print(Reveice_Value[:10],Reveice_Value[10:18],Reveice_Value[18:34],Reveice_Value[34:48],) # print(Reveice_Value[16:18]) if Reveice_Value[17:18] == '2' : print('ID: %s'% Reveice_Value[10:18]) AT = bytes(crc_value) sendAT_Cmd(ser, AT, 1) # ======================================================== ''' Frame head | Data | CRC Address | function | Ntype | 2Type - - - - - - - - - - - - - - - - - - - - 1.获取ID 设备地址，并保存 2.确实发送的功能码 3.读取寄存器地址和数量 4.CRC校验 - - - - - - - - - - - - - - - - - - - - 1.获取设备地址 0xff, 0x03, 0x75, 0x52, 0x00, 0x01, 0xff, 0xff ''' # =============================================================== # =============================================================== ''' #=============================================================== # 测试专用 #=============================================================== ''' if __name__ == '__main__': print('-------------------------------------') print('= 欢迎进入 测试环境 =') print('------------------------------------- ') # # 语句 # AT_CMD = [0x01, 0x04, 0x13, 0x7e, 0x00, 0x0A] # Input_AT_CMD(AT_CMD) # Modbus_CRC() Serial_info() sur.colse() # ===============================================================
__all__ = ["CalCRC16","CheckCRC"] # =============================================================== import crcmod # =============================================================== ''' # ====================================== # 校验函数 函数 # ====================================== ''' def CalCRC16(data, length): print(' 校验函数 CalCRC16') print('显示输入参数：',data,' ', length) crc=0xFFFF # 初始值 变量申明 if length == 0: length = 1 ## for j in data: ## crc ^= j j = 0 while length != 0: crc ^= list.__getitem__(data, j) #print('j=0x%02x, length=0x%02x, crc=0x%04x' %(j,length,crc)) for i in range(0,8): if crc & 1: crc >>= 1 crc ^= 0xA001 else: crc >>= 1 length -= 1 j += 1 ##if length == 0: ## break return crc # =============================================================== def CheckCRC(data, length, crctype): print('校验CRC CheckCRC') print('Length | Type | Data : ',length, type(data), data) if length < 3: print('The data len(%d) is less than 3!!!', length) return 0 crc_res = 0 tmp=[0,0,0,0] if crctype == 0: crc_res = CalCRC16(data, length-2) tmp[0] = crc_res & 0xFF tmp[1] = (crc_res >> 8) & 0xFF if data[length-2] == tmp[0] and data[length-1] == tmp[1]: return 1 elif crctype == 1: print('CRC32 is not support...') return 0 # =============================================================== # =============================================================== ''' #=============================================================== # 测试专用 #=============================================================== ''' if __name__ == '__main__': ## Name Identifier-name, Poly Reverse Init-value XOR-out Check ## ['modbus','CrcModbus',0x18005,REVERSE,0xFFFF,0x0000,0x4B37] ## crc16 = crcmod.mkCrcFun(0x18005, rev=True, initCrc=0xFFFF, xorOut=0x0000) # rev=True,False crc16 = crcmod.mkCrcFun(0x18005, initCrc=0xFFFF,rev=True, xorOut=0x0000) # rev=True,False crc_array = b'0xFE 0xFD' crc_calc = crc16(crc_array) #计算得到的CRC a=hex(crc_calc) print(crc_calc,a) print(' ') # ========================================= crc_value = [0x01, 0x04, 0x13, 0x87, 0x00, 0x30] crc_transformation = CalCRC16(crc_value,len(crc_value)) crc_calculation = hex(crc_transformation) # print('crc_calculation:',crc_calculation) tasd = [0x00,0x00] tasd[0] = crc_transformation & 0xFF tasd[1] = (crc_transformation >> 8) & 0xFF H =hex(tasd[0]) L =hex(tasd[1]) H_value = int(H,16) L_value = int(L,16) crc_value.append(H_value) crc_value.append(L_value) print(crc_value) # calculation value CRC # ======================================================== print(' ') # crc_value2 = [0x01, 0x04, 0x13, 0x87, 0x00, 0x30,0x44,0xB3] # print('crc_value2:',crc_value2) # crc_cheak=CheckCRC(crc_value2,len(crc_value2),0) crc_check=CheckCRC(crc_value,len(crc_value),0) if crc_check == 1: print('Right') else: print('wrong') print(crc_check) # check calculation value
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RUN Result
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------------------------------------- = 欢迎进入 测试环境 = ------------------------------------- 校验函数 Modbus CRC 校验函数 CalCRC16 显示输入参数： [1, 4, 19, 126, 0, 10] 6 crc_transformation: 37140 <class 'int'> crc_calculation : 0x9114 <class 'str'> crc_value : 8 <class 'list'> [1, 4, 19, 126, 0, 10, 20, 145] 校验CRC CheckCRC Length | Type | Data : 8 <class 'list'> [1, 4, 19, 126, 0, 10, 20, 145] 校验函数 CalCRC16 显示输入参数： [1, 4, 19, 126, 0, 10, 20, 145] 6 Result : 1 CRC_Check : Right 串口初始化 Serial_info 默认请输入：1 重新输入为：2 您的请选择： 1 发送指令函数 send_cmd Command : b'x01x04x13~x00 x14x91' Port : COM5 等待回复函数 waitForCmdOKRsp Len : 19 Type : <class 'bytes'> Rsponse : b'x00x00x00x02x02x04 xc3x00Rx82dx00x00x00x02x02x04 ' Len : 38 <class 'str'> 00000002020409c3005282640000000202040a Len : 1 <class 'list'> ['00000002020409c3005282640000000202040a'] Handle_Reveice 0000000202 0409c300 5282640000000202 040a Len : 24 Type : <class 'bytes'> Rsponse : b'x15x00<xe24x00x00x00x02x02x04 xc3x00Rx82dx00x00x00x02x02x04 ' Len : 48 <class 'str'> 15003ce23400000002020409c3005282640000000202040a Len : 1 <class 'list'> ['15003ce23400000002020409c3005282640000000202040a'] Handle_Reveice 15003ce234 00000002 020409c300528264 0000000202040a ID: 00000002 发送指令函数 send_cmd Command : b'x01x04x13~x00 x14x91' Port : COM5 等待回复函数 waitForCmdOKRsp Len : 24 Type : <class 'bytes'> Rsponse : b'x15x00<xe24x00x00x00x02x02x04 xc3x00Rx82dx00x00x00x02x02x04 ' Len : 48 <class 'str'> 15003ce23400000002020409c3005282640000000202040a Len : 1 <class 'list'> ['15003ce23400000002020409c3005282640000000202040a'] Handle_Reveice 15003ce234 00000002 020409c300528264 0000000202040a ID: 00000002 发送指令函数 send_cmd Command : b'x01x04x13~x00 x14x91' Port : COM5 等待回复函数 waitForCmdOKRsp Len : 24 Type : <class 'bytes'> Rsponse : b'x15x00<xe24x00x00x00x01x01x04 xc3x00Rx82Wx00x00x00x01x01x04 ' Len : 48 <class 'str'> 15003ce23400000001010409c3005282570000000101040a Len : 1 <class 'list'> ['15003ce23400000001010409c3005282570000000101040a'] Handle_Reveice 15003ce234 00000001 010409c300528257 0000000101040a Len : 24 Type : <class 'bytes'> Rsponse : b'x15x00<xe2x07x00x00x00x01x01x04 xc3x00Rx82Wx00x00x00x01x01x04 ' Len : 48 <class 'str'> 15003ce20700000001010409c3005282570000000101040a Len : 1 <class 'list'> ['15003ce20700000001010409c3005282570000000101040a'] Handle_Reveice 15003ce207 00000001 010409c300528257 0000000101040a Len : 24 Type : <class 'bytes'> Rsponse : b'x15x00<xe2x07x00x00x00x01x01x04 xc3x00Rx82Wx00x00x00x01x01x04 ' Len : 48 <class 'str'> 15003ce20700000001010409c3005282570000000101040a Len : 1 <class 'list'> ['15003ce20700000001010409c3005282570000000101040a'] Handle_Reveice 15003ce207 00000001 010409c300528257 0000000101040a Len : 24 Type : <class 'bytes'> Rsponse : b'x15x00<xe2x07x00x00x00x02x02x04 xc3x00Rx82dx00x00x00x02x02x04 ' Len : 48 <class 'str'> 15003ce20700000002020409c3005282640000000202040a Len : 1 <class 'list'> ['15003ce20700000002020409c3005282640000000202040a'] Handle_Reveice 15003ce207 00000002 020409c300528264 0000000202040a ID: 00000002 发送指令函数 send_cmd Command : b'x01x04x13~x00 x14x91' Port : COM5 等待回复函数 waitForCmdOKRsp Len : 24 Type : <class 'bytes'> Rsponse : b'x15x00<xe24x00x00x00x02x02x04 xc3x00Rx82dx00x00x00x02x02x04 ' Len : 48 <class 'str'> 15003ce23400000002020409c3005282640000000202040a Len : 1 <class 'list'> ['15003ce23400000002020409c3005282640000000202040a'] Handle_Reveice 15003ce234 00000002 020409c300528264 0000000202040a ID: 00000002 发送指令函数 send_cmd Command : b'x01x04x13~x00 x14x91' Port : COM5 等待回复函数 waitForCmdOKRsp Process finished with exit code -1