I got my hands on a SPI SD card adapter and managed to try out SD/MMC support for it through NuttX on my Pico. FAT file systems worked with no problem, and after a little configuring I managed to get littlefs going as well.
Now I'm wondering if NuttX has support for multiple partitions on the same device; I'm hoping I can take a 32GB micro-SD card and have 16GB be littlefs and 16GB be vfat. I haven't been able to find any documentation about this though, and after formatting my SD card to have two vfat partitions I can see that NuttX is only able to mount the first one. I managed briefly to get both partitions on one card by first formatting the card as littlefs, then using fdisk on my host computer to add a vfat partition starting halfway through the card, and then was able to mount both on NuttX as two distinct file systems. Unfortunately after putting files on them, rebooting NuttX and trying to remount, the vfat partition was corrupted. Has anyone managed to get multiple partitions to work? How would I go about it? Matteo
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