SPI interface should not be really hard to understand. The best way to learn it, buy a eeprom like 93c06,93c46 or 93c56, write some data and read them back. Once you'll be confortable with the IC and the datasheet, jump to your qwheel... they're not much hard than a external eeprom.
you'll need 4 i/o and a bit of patience to understand and make an SPI interface work. See Melabs website SPI.bas or something like that that write and read data to eeprom
good luck
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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