学习日志-0004:python 模拟 GPS, $GPRMC & $GPRMC
数据详解:$GPRMC,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>*hh <1> UTC 时间,hhmmss(时分秒)格式 <2> 定位状态,A=有效定位,V=无效定位 <3> 纬度ddmm.mmmm(度分)格式(前面的0也将被传输) <4> 纬度半球N(北半球)或S(南半球) <5> 经度dddmm.mmmm(度分)格式(前面的0也将被传输) <6> 经度半球E(东经)或W(西经) <7> 地面速率(000.0~999.9节,前面的0也将被传输) <8> 地面航向(000.0~359.9度,以真北为参考基准,前面的0也将被传输) <9> UTC 日期,ddmmyy(日月年)格式 <10> 磁偏角(000.0~180.0度,前面的0也将被传输) <11> 磁偏角方向,E(东)或W(西) <12> 模式指示(仅NMEA01833.00版本输出,A=自主定位,D=差分,E=估算,N=数据无效) "$GPRMC," + "060949.000" +",A,3150.7815,N,11711.9239,E,2.87,314.13," + "050314" + ",,,D*69<CR><LF>" """ $GNRMC,092846.400,A,3029.7317,N,10404.1784,E,000.0,183.8,070417,,,A*73 $GNRMC, 092846.400, // UTC时间,hhmmss.sss(时分秒.毫秒)格式 A, // 定位状态,A=有效定位,V=无效定位 3029.7317,N, // 纬度 10404.1784,E, // 经度 000.0, // 地面速率 183.8, // 地面航向 070417, // UTC日期 , // 磁俯角 , // 磁方向角 A*73 // 模式指示 """ #coding:utf-8 #!/usr/bin/python3 import sys,os import re import logging import datetime #add path for import module filePath = os.getcwd() sys.path.append(filePath) from Com_Utilities.FlexConfig import ResourcesConfig as flexConfig from Com_Utilities.Uart import CSerial as Uart from Com_Utilities.ResourceHandler import resourceHandler as Resource __all__ = ["GPS_Fake"] """ GPS data packet format: 数据详解:$GPRMC,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>*hh <1> UTC 时间,hhmmss(时分秒)格式 <2> 定位状态,A=有效定位,V=无效定位 <3> 纬度ddmm.mmmm(度分)格式(前面的0也将被传输) <4> 纬度半球N(北半球)或S(南半球) <5> 经度dddmm.mmmm(度分)格式(前面的0也将被传输) <6> 经度半球E(东经)或W(西经) <7> 地面速率(000.0~999.9节,前面的0也将被传输) <8> 地面航向(000.0~359.9度,以真北为参考基准,前面的0也将被传输) <9> UTC 日期,ddmmyy(日月年)格式 <10> 磁偏角(000.0~180.0度,前面的0也将被传输) <11> 磁偏角方向,E(东)或W(西) <12> 模式指示(仅NMEA01833.00版本输出,A=自主定位,D=差分,E=估算,N=数据无效) "$GPRMC," + "060949.000" +",A,3150.7815,N,11711.9239,E,2.87,314.13," + "050314" + ",,,D*69<CR><LF>" time format: 080650.000 & 08:06:50.000 date format: 311219 & 2019/12/31 """ """ $GNRMC,092846.400,A,3029.7317,N,10404.1784,E,000.0,183.8,070417,,,A*73 $GNRMC, 092846.400, // UTC时间,hhmmss.sss(时分秒.毫秒)格式 A, // 定位状态,A=有效定位,V=无效定位 3029.7317,N, // 纬度 10404.1784,E, // 经度 000.0, // 地面速率 183.8, // 地面航向 070417, // UTC日期 , // 磁俯角 , // 磁方向角 A*73 // 模式指示 """ class GPS_Fake(Uart): def __init__(self, userName, userID): self.resource = Resource(); # serial port message: [0]-port, [1]-baud serialportMsg = self.resource.get_Serial_Or_IP(userName,userID) Uart.__init__(self, serialportMsg[0], int(serialportMsg[1]), 10) self.Serial_Create() def __GPS_CheckSum__(self, string ): checksum = 0 val = bytes(string) for index in range(len(val)): checksum ^= val[index] return checksum #time format: 080650.000 & 08:06:50.000 def GPS_CurrentFormatTime(self): now_time = datetime.datetime.now() strTime = now_time.strftime("%H%M%S.%f") str = strTime.split('.') micSecond = str[1][0:3] nowTime = str[0] + "." + micSecond return nowTime #time format: 260419 & 2019/04/26 def GPS_CurrentFormatDate(self): now_time = datetime.datetime.now() covYear = now_time.year-2000 nowDate = "%02d%02d%02d" %(now_time.day,now_time.month,covYear) return nowDate def GPRMC_SendMessage(self, time, date): gpsMessage = "GPRMC," + time + ",A,3150.7815,N,12123.5344,E,2.87,314.13," + date + ",,,D" checkSum = self.__GPS_CheckSum__(gpsMessage) Message = "$" + gpsMessage + "*" + str(checkSum, encoding = "utf8")+ "\r\n" self.Serial_WriteString(Message) def GPRMC_SendMessage(self, time, date, latitude, longitude): gpsMessage = "GPRMC," + time + ",A," + latitude +",N,"+ longitude + ",E,2.87,314.13," + date + ",,,D" checkSum = self.__GPS_CheckSum__(gpsMessage) Message = "$" + gpsMessage + "*" + str(checkSum, encoding = "utf8")+ "\r\n" self.Serial_WriteString(Message) def GNRMC_SendMessage(self, time, date): gpsMessage = "GNRMC," + time + ",A,3150.7815,N,12123.5344,E,2.87,314.13," + date + ",,,A" checkSum = self.__GPS_CheckSum__(gpsMessage) Message = "$" + gpsMessage + "*" + str(checkSum, encoding = "utf8")+ "\r\n" self.Serial_WriteString(Message) def GNRMC_SendMessage(self, time, date, latitude, longitude): gpsMessage = "GNRMC," + time + ",A," + latitude +",N,"+ longitude + ",E,2.87,314.13," + date + ",,,A" checkSum = self.__GPS_CheckSum__(gpsMessage) Message = "$" + gpsMessage + "*" + str(checkSum, encoding = "utf8")+ "\r\n" self.Serial_WriteString(Message) def GPS_Stop(self): self.Serial_Close() #test example if __name__ == '__main__': gps_test = GPS_Fake() gps_test.Serial_Create()