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Does a core to interface an SD card exist in SOPC builder? if so, what is its name?
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When looking for IP cores, be aware that there are two methods of interfacing to SD cards; SPI and parallel mode. The SPI mode is slower than the parallel mode. Access to the specification for the parallel mode interface requires joining the SD card organization, or at least signing an NDA (non-disclosure agreement).
If you're looking for something free (but possibly slow), look at opencores for an IP core, or go find the specification (the SPI commands are published) and just implement access using an SPI controller and a NIOS processor. There should be plenty of examples of microcontroller code, eg. the LPC2000 Yahoo group, or the Circuit Cellar magazine are two places I recall seeing code or discussions.
If you need something faster, then you'll have to buy an SD card IP core (and that IP core will come with the source code encrypted).
Cheers,
Dave
