Read data from a SD card using an Altera Max II

Hi, thanks for your answer.

I need only to read from the Sd card. And I want to read raw data, so I don´t need any type of filesystem in the Sd card, like Fat16/32. In the cpld I´m assuming the card was previously filled with the raw data I want to access.

So what I want is to receive an address and read the Sd card to retrieve the byte in that address.

So I need some ideas on how implement this. In the Sd protocol can I access individual raw bytes from any address or can I only retrieve blocks? Other question is if the EPM240 has enough logic to implement this kind of work, but from what you said it probably has.

About writing some rtl, probably I´ll need to implement code from scratch. I don´t have much experience with cpld/fpga, but I think I can handle myself with hdl code in stuff not so complex.

If you have more information please let me know.

Thanks,

Doug