sdmmc_core/command/class/class8/acmd42/
arg.rs

1use crate::lib_bitfield;
2use crate::result::{Error, Result};
3
4mod cd;
5
6pub use cd::*;
7
8lib_bitfield! {
9    /// Argumentument for ACMD6.
10    pub Argument(u32): u8 {
11        raw_set_cd: 0;
12    }
13}
14
15impl Argument {
16    /// Represents the byte length of the [Argument].
17    pub const LEN: usize = 4;
18    /// Represents the raw default value of the [Argument].
19    pub const DEFAULT: u32 = 0;
20
21    /// Creates a new [Argument].
22    pub const fn new() -> Self {
23        Self(0)
24    }
25
26    /// Gets the `bus width` field for the [Argument].
27    pub const fn set_cd(&self) -> CardDetect {
28        CardDetect::from_bool(self.raw_set_cd())
29    }
30
31    /// Sets the `bus width` field for the [Argument].
32    pub fn set_set_cd(&mut self, val: CardDetect) {
33        self.set_raw_set_cd(val.into_bool());
34    }
35
36    /// Attempts to convert a [`u32`] into an [Argument].
37    pub const fn try_from_bits(val: u32) -> Result<Self> {
38        Ok(Self(val))
39    }
40
41    /// Converts the [Argument] into a byte array.
42    pub const fn bytes(&self) -> [u8; Self::LEN] {
43        self.0.to_be_bytes()
44    }
45
46    /// Attempts to convert a [`u32`] into an [Argument].
47    pub const fn try_from_bytes(val: &[u8]) -> Result<Self> {
48        match val.len() {
49            len if len < Self::LEN => Err(Error::invalid_length(len, Self::LEN)),
50            _ => Self::try_from_bits(u32::from_be_bytes([val[0], val[1], val[2], val[3]])),
51        }
52    }
53}
54
55impl Default for Argument {
56    fn default() -> Self {
57        Self::new()
58    }
59}
60
61impl TryFrom<u32> for Argument {
62    type Error = Error;
63
64    fn try_from(val: u32) -> Result<Self> {
65        Self::try_from_bits(val)
66    }
67}
68
69impl From<Argument> for u32 {
70    fn from(val: Argument) -> Self {
71        val.bits()
72    }
73}
74
75impl From<Argument> for [u8; Argument::LEN] {
76    fn from(val: Argument) -> Self {
77        val.bytes()
78    }
79}
80
81impl TryFrom<&[u8]> for Argument {
82    type Error = Error;
83
84    fn try_from(val: &[u8]) -> Result<Self> {
85        Self::try_from_bytes(val)
86    }
87}
88
89impl<const N: usize> TryFrom<&[u8; N]> for Argument {
90    type Error = Error;
91
92    fn try_from(val: &[u8; N]) -> Result<Self> {
93        Self::try_from_bytes(val.as_ref())
94    }
95}
96
97impl<const N: usize> TryFrom<[u8; N]> for Argument {
98    type Error = Error;
99
100    fn try_from(val: [u8; N]) -> Result<Self> {
101        Self::try_from_bytes(val.as_ref())
102    }
103}
104
105#[cfg(test)]
106mod tests {
107    use super::*;
108
109    #[test]
110    fn test_fields() {
111        let new_set_cd = CardDetect::new();
112
113        (1..=u32::BITS)
114            .map(|r| ((1u64 << r) - 1) as u32)
115            .for_each(|raw_arg| {
116                let raw = raw_arg.to_be_bytes();
117
118                match Argument::try_from_bits(raw_arg) {
119                    Ok(mut exp_arg) => {
120                        let exp_set_cd = CardDetect::from_bool((raw_arg & 0b1) != 0);
121
122                        assert_eq!(Argument::try_from_bits(raw_arg), Ok(exp_arg));
123                        assert_eq!(Argument::try_from_bytes(&raw), Ok(exp_arg));
124                        assert_eq!(Argument::try_from(raw_arg), Ok(exp_arg));
125                        assert_eq!(Argument::try_from(raw), Ok(exp_arg));
126                        assert_eq!(Argument::try_from(&raw), Ok(exp_arg));
127
128                        assert_eq!(exp_arg.set_cd(), exp_set_cd);
129
130                        exp_arg.set_set_cd(new_set_cd);
131                        assert_eq!(exp_arg.set_cd(), new_set_cd);
132
133                        exp_arg.set_set_cd(exp_set_cd);
134                        assert_eq!(exp_arg.set_cd(), exp_set_cd);
135                    }
136                    Err(err) => {
137                        let exp_err = Error::invalid_field_variant(
138                            "command::argument::set_cd",
139                            (raw_arg & 0b11) as usize,
140                        );
141                        assert_eq!(err, exp_err);
142                        assert_eq!(Argument::try_from_bytes(&raw), Err(exp_err));
143                        assert_eq!(Argument::try_from(raw_arg), Err(exp_err));
144                        assert_eq!(Argument::try_from(raw), Err(exp_err));
145                        assert_eq!(Argument::try_from(&raw), Err(exp_err));
146                    }
147                }
148            });
149    }
150}
sdmmc_core/command/class/class8/acmd42/arg.rs

sdmmc_core/command/class/class8/acmd42/
arg.rs
