NetBurner Community Forum

I'm attempting to use the fat file system for accessing an SD Card and I don't want to give the library full access to the SPI resources. I've changed a few things in the library to use chip select 3 instead of chip select 2 and IRQ3 instead of IRQ5.

The EFFS-basic example program always returns F_ERR_NOTFORMATTED when trying to mount the drive. f_open() always returns 0. I was pretty careful in mmc_mcf.cpp to convert from spi cs2 to cs3, so not knowing where to go from here.

Anyone have any luck changing chip selects in the EFFS library?

At the beginning of the post you mention exclusive access, then later talk about the chip select. Do you have any other devices on the SPI bus? I don't think you can just manipulate the chip selects when it says it needs exclusive access to the SPI.