There is an example implementing a MMC/SD card driver developped for the IAR-STR750-SK evaluation board. you can find this example in the install directory of the ''IAR Embedded Workbench '' . Hope this helps you. Regards.
i ended up using FatFs http://elm-chan.org/fsw/ff/00index_e.html i took the avr sample, and just changed the mmc driver to work with my str7 spi. this was a simple quick solution to get a mmc driver and fat file system all in one.
I try to modify FATFS to work with STR71 but I do something wrong and it's not working. Does anybody have a working version? I would be very grateful. Regards, Matthew