Using SD over SPI is generally not that of a problem, you just need to
enable it in the Linux Board Setup.
(I did that some time ago, not for the overo/omap, but for a AP7000 and
it worked pretty well).
But the Overo breaks out an additional MMC interface, that you might be
able to use, in order to get higher speed (4bit SD mode instead of 1
bit MMC-SPI mode).
I have that solution ready, but haven't changed the kernel yet, to work
with it. I'll report to you if i get everything running (hopefully in 2
two 3 days)
Am 05.05.2010 15:30, schrieb plasmaphase:
Has anyone attempted using SPI for communications to an SD Card (not the
onboard SD card)? If so, would you please provide any information you would
consider helpful in getting this working. I'm very new to the gumstix. I'm
simply looking to get SPI Mode communication to an SD Card (I have SD Card
spi driver, and have solved the 1.8V to 3.3V issue). Thanks.