[En-Nut-Discussion] PHAT + mmc on Ethernut 1.3g

[Joe Pepe]

Hello.

Per Eklund has working code to read/write an MMC card using version 
4.1.9-rc7 (Nut/OS  assumed).

I'm trying to read / write to an SD card using Nut/OS version 4.1.1.99 but
I've read on an ethernut web page ( 
http://www.ethernut.de/en/documents/phat.html )
that version 4.2.1 or higher is required.

I presently can write and read a file on the card but subsequent to that my
program crashes.

Some of my code follows:

u_short *cReaderName = NULL;
int rrr, iResult;
int saved_memory_amount;

MMC_stream = fopen("PHAT0:/simple.txt", "w");            // Open file in 
write mode
fprintf(MMC_stream, "JCP: -- First line in this file\n");      // Write one 
line of text to file
fclose(MMC_stream);

MMC_stream = fopen("PHAT0:/simple.txt", "rb");
cReaderName = NutHeapAlloc(ftell(MMC_stream)/1000);


while (1)
{
     if ( (iResult = fgetc(MMC_stream)) == -1)
    {
        break;
    }
    else
    {
        if ( (iResult == 0x0D) || (iResult == 0x0A) || (iResult == 0) )
    {
    break;
    }
        else
        {
              cReaderName[rrr++] = iResult;
        }
    }
}


I get through this code once, then, on second call, program crashes.
I've spent many hours on this and trying to upgrade to Nut/OS 4.4.0 using 
the
configurator, both with no success.

Can PHAT work on 4.1.9.99 ?
Is Per Eklund's code available anywhere ?
Any other insight is much appreciated.

Thanks

Joe Pepe
MSL Electronics