matlab生成HEX文件-任意信号 大于64K长度

HEX文件格式不赘述，写里直接放上代码。请批评改正。

 %%convert a signal data into hex file format
 % data format:16bit
 % signal length: less than ^-
 % author: Yang Li yangli0534@gmail.com
 % data:2015.01.

 clear all;
 close all;
 clc;

 %% fixed point or binary16 float point
 fixed=;
 %% generate a signal waveform
 %
 T=;%time length
 fs=1e3;%sample rate
 N=;
 Period=N/fs/;
 f=/Period;
 t=linspace(,(N-)/fs,N);

 %data=:^-;
 data= sin(*pi*f*t) +(rand(,N)-0.5)/;
 % data=mod(*t,);
 % plot(t,data)
 dataBits=;
 byteBits=;

 %% convert into  bits fixed point number
 if fixed ==
     maximum=max(abs(data));%maximum of absolute signal
     scale=(^-)/maximum;%scale
     data=round(data*scale);
     for i=::length(data)
         if data(i) <
             data(i) =^-abs(data(i)) ;
         end
     end
 end
 %% write
 fh=fopen('data.hex','w');%open a new file (file path, file name)
 bytesEveryRow=;%write  bytes every row
 dataEveryRow=bytesEveryRow/(dataBits/byteBits);%number of data every row
 lengthData=length(data);%length of signal data
 rowLengths=ceil(lengthData/dataEveryRow);%number of rows of the file to be written

 for i=:rowLengths % write a row each time
     if(mod(i,hex2dec(''))==)
         baseaddr=dec2hex(floor(i/hex2dec('')),);
         checkSum=+hex2dec(baseaddr(:))+hex2dec(baseaddr(:));
          checkSum=(dec2hex(bitand(-mod(checkSum,),),));
         fprintf(fh,[':02000004',baseaddr,checkSum,,]);%产生HEX码(end-:end)

     end
     checkSum=;
     addr=dec2hex(mod((i-)*,hex2dec('')),);%the start address of this row
     checkSum=hex2dec(addr(:))+hex2dec(addr(:));
     if i*dataEveryRow <lengthData %  numbers of data to be written greater than dataEveryRow
         dataRow=dataEveryRow;
         dataHex='';
         for j=*(i-)+::*(i)
             if fixed == %
                 dataHexCurr=dec2hex(data(j),);% bits fixed point
              else
                 dataHexCurr=num2binary16hex(data(j));%number format: 16bits floatIEEE  half precison float point standard,result is a hex format
              end
             checkSum=checkSum+hex2dec(dataHexCurr(:))+hex2dec(dataHexCurr(:));
             dataHex=strcat(dataHex,dataHexCurr);
         end    

     else
          dataHex='';
          dataRow =lengthData-(rowLengths-)*dataEveryRow;
         for j=(rowLengths-)*dataEveryRow+::lengthData
              if fixed == %
                 dataHexCurr=dec2hex(data(j),);% bits fixed point
              else
                 dataHexCurr=num2binary16hex(data(j));%number format: 16bits floatIEEE  half precison float point standard,result is a hex format
              end
             checkSum=checkSum+hex2dec(dataHexCurr(:))+hex2dec(dataHexCurr(:));
             dataHex=strcat(dataHex,dataHexCurr);
         end
     end
    checkSum=checkSum+dataRow*dataBits/byteBits;
     checkSum=(dec2hex(bitand(-mod(checkSum,),),));
 %     disp([num2str(i),'--',dataHex,'--',checkSum])
     fprintf(fh,[':',dec2hex(dataRow*dataBits/byteBits,),addr,'',dataHex,checkSum,,]);%产生HEX码(end-:end)
 end

 fprintf(fh,':00000001FF');
 fclose(fh);

代码中有定点浮点两种，其中浮点格式为IEEE754标准中的half-precision-floating point, 16bit, 1bit 浮号位，5bit指数位，10小数位，代码如下：

 function [ hex ] = num2binary16he( number )
 %The IEEE  standard specifies a binary16 as having the following format:

 %Sign bit:  bit
 %Exponent width:  bits
 %Significand precision:  bits ( explicitly stored)
 %S EEEEE MMMMMMMMMM
 %INPUT: number is a random precision number

 %OUTPUT : var binary is a 's string of the binary16
 %         var decimail is the value of the number in decimal

 %Author :Yang Li .
 %Email: yangli0534@gmail.com
 if real(number) >= ^
     error('beyond the maximum :-2^14--+2^24');
 end

 S=number< ;
 E=;
 M=abs(number);
 while((E>- && E<)&&( M>= || M< ))
     if(M>=)
      E=E+;
      M=M/;
     else
         E=E-;
         M=M*;
     end
 end
 if ((E==- || E==)&& M>= || M<)
     M=;
 else
     M=round((M-)*^) ;
 end

   number1=(-)^S*(^ E   )*(+M/^);
 % binary=strcat(num2str(S),num2str(E),num2str(M))
 E =E+;
 binary=strcat(num2str(S),dec2bin(E,), dec2bin(M,)) ;

 sReal=(str2double(binary()));
 eReal =-;
  for i=:
     eReal=eReal+str2double(binary(i))*^(-i);
  end
 %  eReal=eReal*(-)^str2double(binary());
  mReal = ;
 for i=:
     mReal=mReal+str2double(binary(i))*^(-i);
 end 

 numberReal=(-)^sReal*^eReal*(+mReal/^);
 err=num2str(abs(number-numberReal));
 decimal=numberReal;
 % disp(['the origin data is : ',num2str(number)]);
 % disp(['the float format is : ',binary]);
 % disp(['so ,there is a error :',num2str(abs(number-numberReal))]);

 num=;
 for i=:
     num=num+str2double(binary(i))*^(-i);
 end
 hex=dec2hex(num,);
 end