Read float values from file stored on SD Card

[Altera_Forum]

Hello all, 

 I have a matrix with float values which I will be saving in a file from Matlab. I have to copy this file to SD Card and read these values using NIOS 2 while running my program. What is the best method to do this?   Should I simply store the values using fprintf in Matlab? Will I be able to read these values using fscanf in NIOS?  I am using the FAT file functions from the SD Card Audio Demo program but I think those functions read one byte at time. It will be difficult to re-format my data after reading because my values will be stored as float.  Any ideas on how I can implement this?  Thanks

[Altera_Forum]

Solved the problem myself using fwrite(fid,A,'float32'); in Matlab and using a union of char[4] and float in NIOS, thanks to stackoverflow.com 

  union {  char chars[4];  float f;  } u;  Read 4 bytes in u.char and use u.f, it will be exactly what's needed.

[Altera_Forum]

can u send me copies of your NIOS coding.. just for references for my project

[Altera_Forum]

--- Quote Start ---  Solved the problem myself using fwrite(fid,A,'float32'); in Matlab and using a union of char[4] and float in NIOS, thanks to stackoverflow.com   union {  char chars[4];  float f;  } u;  Read 4 bytes in u.char and use u.f, it will be exactly what's needed.  --- Quote End ---    If the endianess stored in the file by Matlab is the same as NIOS II endianess (it probably it is), you don't need the char[4] array, you can just read and write 4 bytes to and from the address of the float.  BillA