sdmmc-core 0.5.0

SD/MMC core data structures and algorithms
Documentation 
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use crate::result::Result;

use super::{ExtCsd, ExtCsdIndex};

mod revision;

pub use revision::*;

impl ExtCsd {
    /// Gets the `EXT_CSD_REV` field of the [ExtCsd] register.
    pub const fn ext_csd_rev(&self) -> Result<ExtCsdRevision> {
        ExtCsdRevision::try_from_inner(self.0[ExtCsdIndex::ExtCsdRev.into_inner()])
    }

    /// Sets the `EXT_CSD_REV` field of the [ExtCsd] register.
    pub(crate) fn set_ext_csd_rev(&mut self, val: ExtCsdRevision) {
        self.0[ExtCsdIndex::ExtCsdRev.into_inner()] = val.into_inner();
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_ext_csd_rev() {
        let mut ext_csd = ExtCsd::new();

        assert_eq!(ext_csd.ext_csd_rev(), Ok(ExtCsdRevision::new()));

        (0..=u8::MAX).for_each(|raw_ext| {
            // set a potentially invalid ExtCsdRev
            ext_csd.0[ExtCsdIndex::ExtCsdRev.into_inner()] = raw_ext;

            match ExtCsdRevision::try_from_inner(raw_ext) {
                Ok(ext) => assert_eq!(ext_csd.ext_csd_rev(), Ok(ext)),
                Err(err) => assert_eq!(ext_csd.ext_csd_rev(), Err(err)),
            }
        });
    }
}