GP32 Reading From Smc?

[mystic_twin]

Hello,

I was just wondering if anyone has any code for reading files from an smc, i want to be able to load audio files for playback.

thank you,

Ian,

Btw, if you also know of any code on how to write to the smc, that would be cool.

Thanks.

 

[trans]

Hello,

I was just wondering if anyone has any code for reading files from an smc, i want to be able to load audio files for playback.

thank you,

Ian,

Btw, if you also know of any code on how to write to the smc, that would be cool.

Thanks.

which OS/SDK?

 

[Squidge]

Look up GpFileOpen, GpFileCreate etc in the official SDK documentation, or use fopen in Mirko's SDK, etc (he has a PDF covering all of his SDKs functions - see his thread for a link).

 

[trans]

Look up GpFileOpen, GpFileCreate etc in the official SDK documentation, or use fopen in Mirko's SDK, etc (he has a PDF covering all of his SDKs functions - see his thread for a link).

or look@
http://gp32sdk.ath.cx
http://gp32sdk.ath.cx/addon/gp32_SDK.zip (compatible with mirko's SDK)

 

[Alessandro]

Yep but remember: before doing any smc operation you have to call GpFatInit()
If you miss this, you won't go any futher...

I personally use the devkitadv SDK and I goth the following functions in gpstdio.h:

ERR_CODE GpFatInit (void);
...
ERR_CODE GpFileOpen (const char * p_file_name, ulong fopen_mode, F_HANDLE *p_handle);
ERR_CODE GpFileRead (F_HANDLE h_file, void * p_buf, ulong buf_size, ulong * p_read_count);
ERR_CODE GpFileWrite (F_HANDLE h_file, const void * p_buf, ulong count);
ERR_CODE GpFileSeek (F_HANDLE h_file, ulong seek_mode, ulong offset, long * p_old_offset);
ERR_CODE GpFileClose (F_HANDLE h_file);
...

With those you can do everything... Just a brief example, in case you need it:

F_HANDLE *myfile;
char mydata;

GpFatInit();
if( GpFileOpen( "gp:\\gpmm\\test.bin", OPEN_R, &myfile )!=SM_OK )
  return -1;
if( GpFileRead( myfile, &mydata, sizeof(mydata), 1)==SM_OK )
{
....
}
...
GpFileClose( myfile );

Hope you got the idea..

Good luck with your coding

Later
Alessandro

 

[Moogle]

I don't understand:

if( GpFileRead( myfile, &mydata, sizeof(mydata), 1)==SM_OK )

you never seemed to define the size of mydata? Are you intentionally reading in blocks? :blink:

 

[loki666]

mydata is a char (size=1byte)

 

[Moogle]

That's a yes then. It seemed odd to me that you are reading in 1 byte chunks, I would've found it more logical if you read a string or int or whatever, so I suspected a special meaning with the 1 byte size.

 

[mystic_twin]

Thanks guys, that helps alot.

Cheers for the source code Alessandro. That will be very usefull.

Ian