sdmmc

A sdmmc implementation mainly focusing on embedded system with no_std and async support

Using this crate

Assuming you already have SPI struct which implements sdmmc::spi::Transfer

let spi = spidev("/dev/spidev0.0").map_err(|e| e.to_string())?;
let cs = gpio::sysfs::SysFsGpioOutput::open(22).map_err(|e| e.to_string())?;
let mut spi = spi::Bus::new(SPI(spi), GPIO(cs), CountDown::default());
let card = spi.init(Delay).await.map_err(|e| format!("{:?}", e))?;
debug!("Card: {:?}", card);
let mut sd = SD::init(spi, card).await.map_err(|e| format!("{:?}", e))?;
let size = Size::from_bytes(sd.num_blocks() as u64 * sd.block_size() as u64);
debug!("Size {}", size);

let options = SpidevOptions { max_speed_hz: Some(2_000_000), ..Default::default() };
sd.bus(|bus| bus.spi(|spi| spi.0.configure(&options))).unwrap();

let mut buffer = [0u8; 512];
sd.read(0, slice::from_mut(&mut buffer).iter_mut()).await.map_err(|e| format!("{:?}", e))?;
let mbr = MasterBootRecord::from_bytes(&buffer).map_err(|e| format!("{:?}", e))?;
for partition in mbr.partition_table_entries().iter() {
println!("{:?}", partition);
}
Ok(())