最新MATLAB解析GPS数据程序

1、% 注：本程序可直接在MATLAB 2017a 中运行%该脚本文件用于学习GPS数据的读取，需要做其他用途请自行修改代码%本脚本文件的前面几行代码是要设置的一些参数%默认使用COM3（需视情况修改）%波特率设为GPS模块默认的38400%下面为程序源码 clearnum_execute = 100; % 执行次数num_SingleRead = 150; %单次从串口读取的字节数(最好设置足够大（最低大概设为80），保证单次读取的数据包含一条完整的GPS数据)Timedelay = 0.2; % 用于延时读取串口数据BaudRate = 38400; % 读取数据的波特率Terminator

2、= 'CR'num_MaxTry = 5; %打开串口的最多尝试次数BytesAvailableFcnCount = 1000;% 设置参数% delete(instrfindall); % 串口打开失败时使用此句% delete(s);clear s % 串口打开失败时使用此句serial3 = serial('COM3');% 串口设置 serial3.BytesAvailableFcnMode = 'byte'% serial3.InputBufferSize = 38400; % 输出波特率serial3.BaudRate = BaudR

3、ate; % 读入波特率% serial3.OutputBufferSize = 1024;serial3.BytesAvailableFcnCount = BytesAvailableFcnCount;serial3.ReadAsyncMode = 'continuous'serial3.Terminator = Terminator;% 打开串口count_opentimes = 1;while contains(serial3.status,'closed') > 0 && count_opentimes < num_MaxTr

4、y fopen(serial3); %打开串口 count_opentimes = count_opentimes+1;endif contains(serial3.status,'open') < 1 disp('open com failed!'); returnend% 读取并处理数据% 初始化GPS_Data = GPS_Init();while(num_execute > 0) GPS_DataStrs = fread(serial3,num_SingleRead,'char'); %一次读出10个字符 GPS_DataSt

5、rs = reshape(GPS_DataStrs,1,); GPS_DataStrs = split_str2strs(GPS_DataStrs); GPS_Data_tmp = get_GPS_specificData(GPS_DataStrs); GPS_Data = Updata_GPU_Data(GPS_Data,GPS_Data_tmp); show_GPS_Data(GPS_Data); pause(Timedelay); % 延时 num_execute = num_execute-1;end% fprintf(s,'abcd'); %给串口的发送数据% fsc

6、anf(s); %从串口的接收缓存读数据% 关闭串口并删除相关数据fclose(serial3); %关闭串口delete(serial3);clear serial3% %将字符串根据'rn'划分成多个子字符串,同时去掉首尾无用的残余字符串function out_strs = split_str2strs(StrData) if contains(class(StrData),'char') uint8(StrData); end record = get_pos_enterflag(StrData); if StrData(1) = uint8('

7、$') %开头为'$'的情况 flag_start = 1; else if size(record,2) > 0 flag_start = record(1)+2; else out_strs = cell(0,0); return end end if StrData(end) = 13 flag_end = length(StrData)-1; else if size(record,2) > 0 flag_end = record(end)-1; end end if flag_start >= flag_end out_strs = cell

8、(0,0); return end StrData = StrData(flag_start:flag_end); % 截取有效数据，方便下面划分子字符串 record = get_pos_enterflag(StrData); num_strs = size(record,2)+1; out_strs = cell(num_strs,1); if num_strs > 1 out_strs1,1 = char(StrData(1:record(1)-1); if num_strs = 2 out_strsnum_strs,1 = char(StrData(record(1)+2:end

9、); else for i = 2 : num_strs-1 out_strsi,1 = char(StrData(record(i-1)+2:record(i)-1); end out_strsnum_strs,1 = char(StrData(record(i)+2:end); end else out_strs1,1 = char(StrData); end % 得到字符串中'rn'在字符串中的位置(实际为'r'的位置) function record = get_pos_enterflag(data) record = ; % 记录回车符号位置 for

10、ii = 1 : length(data)-1 if data(ii) = 13 if data(ii+1) = 10 record = record,ii; ii = ii+1; end end end endend% 得到具体GPS结构体数据function GPS_Data_tmp = get_GPS_specificData(StrsData) GPS_Data_tmp = ; num_str = size(StrsData,1); for i = 1 : num_str str_tab = StrsDatai,1; if contains(str_tab,'GGA')

11、 > 0 GPS_Data_tmp = GNGGA(str_tab); elseif contains(str_tab,'GSA') > 0 GPS_Data_tmp = GNGSA(str_tab); elseif contains(str_tab,'GSV') > 0 GPS_Data_tmp = GNGSV(str_tab); elseif contains(str_tab,'RMC') > 0 GPS_Data_tmp = GNRMC(str_tab); elseif contains(str_tab,'V

12、TG') > 0 GPS_Data_tmp = GNVTG(str_tab); elseif contains(str_tab,'GLL') > 0 GPS_Data_tmp = GNGLL(str_tab); end endend% GPS字符串解析function GPS_Data_tmp = GNGGA(str_tab) index = strfind(str_tab,','); count = 1; Time = str_tab(index(count)+1:index(count+1)-1);count=count+1; Latit

13、ude = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.LatitudeDir = str_tab(index(count)+1:index(count+1)-1);count=count+1; Longitude = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.LongitudeDir = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS

14、_Data_tmp.GPSState = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.SatelliteNum = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.HDOP = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.altitude = str_tab(index(count)+1:index(count+1)-1

15、);count=count+1;% other = str_tab(index(count)+1:end); % 进一步处理 GPS_Data_tmp.Time.hour = Time(1:2); GPS_Data_tmp.Time.min = Time(3:4); GPS_Data_tmp.Time.sec = Time(5:6); GPS_Data_tmp.Tlisec = Time(8:10); GPS_Data_tmp.Latitude.degree = Latitude(1:2); % 纬度 GPS_Data_tmp.Latitude.min = Latitude(3:

16、4); tmp = str2double(Latitude(6:9); tmp = tmp*6/1000; % tmp = tmp/10000*60; GPS_Data_tmp.Latitude.sec = num2str(floor(tmp); GPS_Data_tmp.Llisec = num2str(tmp-floor(tmp)*10000); GPS_Data_tmp.Longitude.degree = Longitude(1:3); % 经度 GPS_Data_tmp.Longitude.min = Longitude(4:5); tmp = str2doub

17、le(Longitude(7:10); tmp = tmp*6/1000; % tmp = tmp/10000*60; GPS_Data_tmp.Longitude.sec = num2str(floor(tmp); GPS_Data_tmp.Llisec = num2str(tmp-floor(tmp)*10000); % UTC时间转换为北京时间 hour = GPS_Data_tmp.Time.hour; if str2num(hour)+8 >= 24 GPS_Data_tmp.Time.hour = num2str(str2num(hour)+8-24)

18、; else GPS_Data_tmp.Time.hour = num2str(str2num(hour)+8); endendfunction GPS_Data_tmp = GNGSA(str_tab) index = strfind(str_tab,','); count = 1; GPS_Data_tmp.LocationMode = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.CurState = str_tab(index(count)+1:index(count+1)-1)

19、;count=count+1; GPS_Data_tmp.PRN = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.PDOP = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.HDOP = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.VDOP = str_tab(index(count)+1:index(count+1)

20、-1);count=count+1;% other = str_tab(index(count)+1:end);endfunction GPS_Data_tmp = GNGSV(str_tab)% 此语句为与卫星有关的信息（包括卫星方位，卫星编号）% 暂时用不着，不处理 GPS_Data_tmp = ;endfunction GPS_Data_tmp = GNRMC(str_tab) index = strfind(str_tab,','); count = 1; Time = str_tab(index(count)+1:index(count+1)-1);count=cou

21、nt+1; GPS_Data_tmp.LocationState = str_tab(index(count)+1:index(count+1)-1);count=count+1; Latitude = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.LatitudeDir = str_tab(index(count)+1:index(count+1)-1);count=count+1; Longitude = str_tab(index(count)+1:index(count+1)-1);count=

22、count+1; GPS_Data_tmp.LongitudeDir = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.speed = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.TrueDir = str_tab(index(count)+1:index(count+1)-1);count=count+1; Date = str_tab(index(count)+1:index(count+1)-1);cou

23、nt=count+1; GPS_Data_tmp.MagneticAngle = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.MagneticDir = str_tab(index(count)+1:index(count+1)-1);count=count+1;% other = str_tab(index(count)+1:end); % 进一步处理 GPS_Data_tmp.Time.hour = Time(1:2); GPS_Data_tmp.Time.min = Time(3:4); GPS

24、_Data_tmp.Time.sec = Time(5:6); GPS_Data_tmp.Tlisec = Time(8:10); GPS_Data_tmp.Latitude.degree = Latitude(1:2); % 纬度 GPS_Data_tmp.Latitude.min = Latitude(3:4); tmp = str2double(Latitude(6:9); tmp = tmp*6/1000; % tmp = tmp/10000*60; GPS_Data_tmp.Latitude.sec = num2str(floor(tmp); GPS_Data_tmp.

25、Llisec = num2str(tmp-floor(tmp)*10000); GPS_Data_tmp.Longitude.degree = Longitude(1:3); % 经度 GPS_Data_tmp.Longitude.min = Longitude(4:5); tmp = str2double(Longitude(7:10); tmp = tmp*6/1000; % tmp = tmp/10000*60; GPS_Data_tmp.Longitude.sec = num2str(floor(tmp); GPS_Data_tmp.Lli

26、sec = num2str(tmp-floor(tmp)*10000); GPS_Data_tmp.DATE.day = Date(1:2); GPS_Data_tmp.DATE.month = Date(3:4); GPS_Data_tmp.DATE.year = Date(5:6); % UTC时间转换为北京时间 hour = GPS_Data_tmp.Time.hour; if str2num(hour)+8 >= 24 GPS_Data_tmp.Time.hour = num2str(str2num(hour)+8-24); else GPS_Data_tmp.Time.hour

27、 = num2str(str2num(hour)+8); endendfunction GPS_Data_tmp = GNVTG(str_tab) index = strfind(str_tab,','); count = 1; GPS_Data_tmp.TrueDir = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.ReferenceTrueDir = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_t

28、mp.RelativeDir = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.ReferenceRelativeDir = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.step = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.stepflag = str_tab(index(count)+1:index(count+

29、1)-1);count=count+1; GPS_Data_tmp.velocity = str_tab(index(count)+1:index(count+1)-1);count=count+1;% other = str_tab(index(count)+1:end);endfunction GPS_Data_tmp = GNGLL(str_tab) index = strfind(str_tab,','); count = 1; Latitude = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_

30、Data_tmp.LatitudeDir = str_tab(index(count)+1:index(count+1)-1);count=count+1; Longitude = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Data_tmp.LongitudeDir = str_tab(index(count)+1:index(count+1)-1);count=count+1; Date = str_tab(index(count)+1:index(count+1)-1);count=count+1; GPS_Da

31、ta_tmp.LocationState = str_tab(index(count)+1:index(count+1)-1);count=count+1;% other = str_tab(index(count)+1:end); % 进一步处理 GPS_Data_tmp.Latitude.degree = Latitude(1:2); % 纬度 GPS_Data_tmp.Latitude.min = Latitude(3:4); tmp = str2double(Latitude(6:9); tmp = tmp*6/1000; % tmp = tmp/10000*60; GPS_Data_

32、tmp.Latitude.sec = num2str(floor(tmp); GPS_Data_tmp.Llisec = num2str(tmp-floor(tmp)*10000); GPS_Data_tmp.Longitude.degree = Longitude(1:3); % 经度 GPS_Data_tmp.Longitude.min = Longitude(4:5); tmp = str2double(Longitude(7:10); tmp = tmp*6/1000; % tmp = tmp/10000*60; GPS_Data_tmp.Longitude.se

33、c = num2str(floor(tmp); GPS_Data_tmp.Llisec = num2str(tmp-floor(tmp)*10000); GPS_Data_tmp.DATE.day = Date(1:2); GPS_Data_tmp.DATE.month = Date(3:4); GPS_Data_tmp.DATE.year = Date(5:6);end% 更新获取到的相关数据function GPS_Data = Updata_GPU_Data(GPS_Data,GPS_Data_tmp)% 用不到的数据可以注释掉 if isfield(GPS_Da

34、ta_tmp,'Time') = 1 GPS_Data.Time.hour = GPS_Data_tmp.Time.hour; GPS_Data.Time.min = GPS_Data_tmp.Time.min; GPS_Data.Time.sec = GPS_Data_tmp.Time.sec; GPS_Data.Tlisec = GPS_Data_tmp.Tlisec; end if isfield(GPS_Data_tmp,'DATE') = 1 GPS_Data.DATE.day = GPS_Data_tmp.DATE.day

35、; GPS_Data.DATE.month = GPS_Data_tmp.DATE.month; GPS_Data.DATE.year = GPS_Data_tmp.DATE.year; end if isfield(GPS_Data_tmp,'Latitude') = 1 GPS_Data.Latitude.degree = GPS_Data_tmp.Latitude.degree; GPS_Data.Latitude.min = GPS_Data_tmp.Latitude.min; GPS_Data.Latitude.sec = GPS_Data_tmp.Latitude.

36、sec; GPS_Data.Llisec = GPS_Data_tmp.Llisec; end if isfield(GPS_Data_tmp,'LatitudeDir') = 1 GPS_Data.LatitudeDir = GPS_Data_tmp.LatitudeDir; end if isfield(GPS_Data_tmp,'Longitude') = 1 GPS_Data.Longitude.degree = GPS_Data_tmp.Longitude.degree; GPS_Data.Longitude

37、.min = GPS_Data_tmp.Longitude.min; GPS_Data.Longitude.sec = GPS_Data_tmp.Longitude.sec; GPS_Data.Llisec = GPS_Data_tmp.Llisec; end if isfield(GPS_Data_tmp,'LongitudeDir') = 1 GPS_Data.LongitudeDir = GPS_Data_tmp.LongitudeDir; end if isfield(GPS_Data_tmp,'GPSState&

38、#39;) = 1 GPS_Data.GPSState = GPS_Data_tmp.GPSState; end if isfield(GPS_Data_tmp,'SatelliteNum') = 1 GPS_Data.SatelliteNum = GPS_Data_tmp.SatelliteNum; end if isfield(GPS_Data_tmp,'speed') = 1 GPS_Data.speed = GPS_Data_tmp.speed; end if isfield(GPS_Data_tmp,'velocity') = 1 GP

39、S_Data.velocity = GPS_Data_tmp.velocity; end if isfield(GPS_Data_tmp,'LocationState') = 1 GPS_Data.LocationState = GPS_Data_tmp.LocationState; end if isfield(GPS_Data_tmp,'altitude') = 1 GPS_Data.altitude = GPS_Data_tmp.altitude; end if isfield(GPS_Data_tmp,'CurState') = 1 GP

40、S_Data.CurState = GPS_Data_tmp.CurState; end if isfield(GPS_Data_tmp,'LocationMode') = 1 GPS_Data.LocationMode = GPS_Data_tmp.LocationMode; end if isfield(GPS_Data_tmp,'HDOP') = 1 GPS_Data.HDOP = GPS_Data_tmp.HDOP; end if isfield(GPS_Data_tmp,'VDOP') = 1 GPS_Data.VDOP = GPS_D

41、ata_tmp.VDOP; end if isfield(GPS_Data_tmp,'PDOP') = 1 GPS_Data.PDOP = GPS_Data_tmp.PDOP; end if isfield(GPS_Data_tmp,'TrueDir') = 1 GPS_Data.TrueDir = GPS_Data_tmp.TrueDir; end if isfield(GPS_Data_tmp,'MagneticAngle') = 1 GPS_Data.MagneticAngle = GPS_Data_tmp.MagneticAngle; e

42、nd if isfield(GPS_Data_tmp,'MagneticDir') = 1 GPS_Data.MagneticDir = GPS_Data_tmp.MagneticDir; end if isfield(GPS_Data_tmp,'ReferenceTrueDir') = 1 GPS_Data.ReferenceTrueDir = GPS_Data_tmp.ReferenceTrueDir; end if isfield(GPS_Data_tmp,'RelativeDir') = 1 GPS_Data.RelativeDir =

43、GPS_Data_tmp.RelativeDir; end if isfield(GPS_Data_tmp,'ReferenceRelativeDir') = 1 GPS_Data.ReferenceRelativeDir = GPS_Data_tmp.ReferenceRelativeDir; end if isfield(GPS_Data_tmp,'step') = 1 GPS_Data.step = GPS_Data_tmp.step; end if isfield(GPS_Data_tmp,'stepflag') = 1 GPS_Data

44、.stepflag = GPS_Data_tmp.stepflag; end if isfield(GPS_Data_tmp,'PRN') = 1 GPS_Data.PRN = GPS_Data_tmp.PRN; endend% 显示相关GPS数据function show_GPS_Data(GPS_Data) DataAndTime = sprintf('20%02s-%02s-%02s %02s:%02s:%02s:%03s',. GPS_Data.DATE.year,GPS_Data.DATE.month,GPS_Data.DATE.day,. GPS_D

45、ata.Time.hour,GPS_Data.Time.min,GPS_Data.Time.sec,GPS_Data.Tlisec); Location = sprintf(' %s:%02s°%02s%03s%04s,%s:%02s°%02s%03s%04s',. GPS_Data.LatitudeDir,GPS_Data.Latitude.degree,GPS_Data.Latitude.min,GPS_Data.Latitude.sec,GPS_Data.Llisec,. GPS_Data.LongitudeDir,

46、GPS_Data.Longitude.degree,GPS_Data.Longitude.min,GPS_Data.Longitude.sec,GPS_Data.Llisec);% Others = sprintf(' GPSState:%s,SatelliteNum:%02s,Speed:%03s,Velocity:%s,LocationState:%s',.% GPS_Data.GPSState,GPS_Data.SatelliteNum,GPS_Data.speed,GPS_Data.velocity,GPS_Data.LocationState)

47、;% show_Message_str(strcat(DataAndTime,Location,Others); show_Message_str(strcat(DataAndTime,Location);end% 初始化GPS数据结构体function GPS_Data = GPS_Init() GPS_Data.Time.hour = '0' GPS_Data.Time.min = '0' GPS_Data.Time.sec = '0' GPS_Data.Tlisec = '0' GPS_Data.DATE.da

48、y = '29' GPS_Data.DATE.month = '8' GPS_Data.DATE.year = '18' GPS_Data.Latitude.degree = '0' % 纬度 GPS_Data.Latitude.min = '0' GPS_Data.Latitude.sec = '0' GPS_Data.Llisec = '0' GPS_Data.LatitudeDir = 'N' GPS_Data.Longitude.degree = '0' % 经度 GPS_Data.Longitude.min = '0' GPS_Data.Longitude.sec = '0' GPS_Data.Llisec = '0' GPS_Data.LongitudeDir = 'E' GPS_Data.GPSState = '0' % GPS状态，0：未定位；1：无差分定位；2：带差分