data transfer

hello, anybody plz tell me how can i transfer a file from  pc to TI
DSK(c5416).
thank u.

maddy wrote:
> hello, anybody plz tell me how can i transfer a file from  pc to TI
> DSK(c5416).
> thank u.

You can use the C functions fopen, fread, and fclose to load it.

John

john wrote:
> maddy wrote:
> > hello, anybody plz tell me how can i transfer a file from  pc to TI
> > DSK(c5416).
> > thank u.
>
> You can use the C functions fopen, fread, and fclose to load it.
>
> John

To continue with what John says, it is a good custom to load your
entire data file onto the dsk memory with only one read.

S L

One more Method.

You can convert the file to a .dat file by adding the coff header (
some reading is required to do this ) and then load the file directly
to the DSP memory using the
File-> Data -> Load  option in the code composer studio.

Regards,
Manja.

thank u.
i still want some ellaboration abt this solution u have given;can this
be used to read data file while the code is executing,(as we are
reading a big file,a .wav file),and simultaneously play it?

thank u.
but i think we cant load a big file like ,a wav file.any othr solution
plz let me know.

maddy wrote:
> thank u.
> i still want some ellaboration abt this solution u have given;can this
> be used to read data file while the code is executing,(as we are
> reading a big file,a .wav file),and simultaneously play it?

If the .wav file is too large to fit in the memory on your board, then
you may have to try to read it in using fread, one block at a time. You
might be able to set up a DMA operation to send the current block to
the DAC while you read the next block, but be aware that file input
from the PC over JTAG can be really slow.

Another solution might be to send it from the PC using a COM port.

I think it may also be possible to use probe points to load buffers
from a file as the DSP code executes, but there could be performance
issues with that as well.

Yet another idea is to play it on the PC soundcard and sample it using
a ADC on your board.

John

thanks John.
i tried reading the file using fread.but it is not reading the file at
all.
we looked for help in the help file for fread,it says:
the fread function is defined in the file rts.src
and we are finding that this rts.src, when included, has many errors.
plz help us.

maddy wrote:
> thanks John.
> i tried reading the file using fread.but it is not reading the file at
> all.
> we looked for help in the help file for fread,it says:
> the fread function is defined in the file rts.src
> and we are finding that this rts.src, when included, has many errors.
> plz help us.

You don't want to add rts.src to your project. You want to add rts.lib,
the compiled version. Also, put #include <stdio.h> at the top of your
file.

John

>thanks John.
>i tried reading the file using fread.but it is not reading the file at
>all.
>we looked for help in the help file for fread,it says:
>the fread function is defined in the file rts.src
>and we are finding that this rts.src, when included, has many errors.
>plz help us.
>

Hi Maddy,

fread will work for reading the .wav file. I have done it before. Include
the library file for compilation instead of source file. Also, as John
said include cstdio in header, which you would have. Remember, practically
the read and transfer from the file will be dead slow. Make full use of
DMA. If you are going to benchmark the performance of your program, take
care to exclude the reading part since it has nothing to do with your
algorithm's performance.

- Krishna