Skeleton.

.gitignore

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+/target
+**/*.rs.bk
+Cargo.lock

Cargo.toml

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+[package]
+name = "embedded-sdmmc"
+version = "0.1.0"
+authors = ["Jonathan 'theJPster' Pallant <github@thejpster.org.uk>"]
+
+[dependencies]
+embedded-hal = "0.2.2"
+
+

src/lib.rs

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+//! embedded-sdmmc: A SD/MMC Library written in Embedded Rust
+
+#![no_std]
+
+/// Represents a standard 512 byte block/sector.
+pub struct Block {
+    _contents: [u8; 512],
+}
+
+/// Represents a block device which is <= 2 TiB in size.
+pub trait BlockDevice {
+    type Error;
+    fn read(&mut self, block: &mut Block, block_idx: u32) -> Result<(), Self::Error>;
+    fn write(&mut self, block: &Block, block_idx: u32) -> Result<(), Self::Error>;
+}
+
+pub struct Controller {
+    _x: ()
+}
+
+pub struct Card {
+    _x: (),
+}
+
+pub struct Volume {
+   _name: [u8; 11],
+}
+
+pub struct Directory<'a> {
+   _parent: &'a Volume,
+}
+
+pub struct DirEntry {
+   pub name: [u8; 11],
+   pub mtine: u32,
+   pub ctime: u32,
+   pub attributes: u8,
+}
+
+pub struct File<'a> {
+   _parent: &'a Volume,
+   _offset: u32,
+}
+
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        assert_eq!(2 + 2, 4);
+    }
+}