sdmmc_core/command/class/class0/cmd1/
arg.rs

1use crate::lib_bitfield;
2use crate::register::Ocr;
3use crate::result::{Error, Result};
4
5lib_bitfield! {
6    /// Represents the argument for the [Cmd1](super::Cmd1) command.
7    pub Argument(u32): u32 {
8        raw_ocr: 31, 0;
9    }
10}
11
12impl Argument {
13    /// Represents the byte length of the [Argument].
14    pub const LEN: usize = 4;
15    /// Represents the raw default value of the [Argument].
16    pub const DEFAULT: u32 = 0;
17
18    /// Creates a new [Argument].
19    pub const fn new() -> Self {
20        Self(Self::DEFAULT)
21    }
22
23    /// Gets the [Ocr] field of the [Argument].
24    pub const fn ocr(&self) -> Ocr {
25        Ocr::from_bits(self.raw_ocr())
26    }
27
28    /// Sets the [Ocr] field of the [Argument].
29    pub fn set_ocr(&mut self, mut val: Ocr) {
30        val.set_busy(false);
31        self.set_raw_ocr(val.bits())
32    }
33
34    /// Attempts to convert a [`u32`] into an [Argument].
35    pub const fn try_from_bits(val: u32) -> Result<Self> {
36        match Self(val) {
37            arg if arg.ocr().busy() => Err(Error::invalid_field_variant(
38                "cmd::arg::ocr",
39                arg.raw_ocr() as usize,
40            )),
41            arg => Ok(arg),
42        }
43    }
44
45    /// Converts the [Argument] into a byte array.
46    pub const fn bytes(&self) -> [u8; Self::LEN] {
47        self.0.to_be_bytes()
48    }
49
50    /// Attempts to convert a byte slice into an [Argument].
51    pub const fn try_from_bytes(val: &[u8]) -> Result<Self> {
52        match val.len() {
53            len if len < Self::LEN => Err(Error::invalid_length(len, Self::LEN)),
54            _ => Self::try_from_bits(u32::from_be_bytes([val[0], val[1], val[2], val[3]])),
55        }
56    }
57}
58
59impl Default for Argument {
60    fn default() -> Self {
61        Self::new()
62    }
63}
64
65impl TryFrom<u32> for Argument {
66    type Error = Error;
67
68    fn try_from(val: u32) -> Result<Self> {
69        Self::try_from_bits(val)
70    }
71}
72
73impl From<Argument> for u32 {
74    fn from(val: Argument) -> Self {
75        val.bits()
76    }
77}
78
79impl From<Argument> for [u8; Argument::LEN] {
80    fn from(val: Argument) -> Self {
81        val.bytes()
82    }
83}
84
85impl TryFrom<&[u8]> for Argument {
86    type Error = Error;
87
88    fn try_from(val: &[u8]) -> Result<Self> {
89        Self::try_from_bytes(val)
90    }
91}
92
93impl<const N: usize> TryFrom<&[u8; N]> for Argument {
94    type Error = Error;
95
96    fn try_from(val: &[u8; N]) -> Result<Self> {
97        Self::try_from_bytes(val.as_ref())
98    }
99}
100
101impl<const N: usize> TryFrom<[u8; N]> for Argument {
102    type Error = Error;
103
104    fn try_from(val: [u8; N]) -> Result<Self> {
105        Self::try_from_bytes(val.as_ref())
106    }
107}
108
109#[cfg(test)]
110mod tests {
111    use super::*;
112
113    #[test]
114    fn test_fields() {
115        let mut arg = Argument::new();
116        let new_ocr = Ocr::new();
117
118        assert_eq!(arg.ocr(), new_ocr);
119
120        (1..u32::BITS)
121            .map(|r| ((1u64 << r) - 1) as u32)
122            .for_each(|raw_arg| {
123                let mut exp_arg = Argument(raw_arg);
124                let exp_ocr = Ocr::from_bits(raw_arg);
125                let raw = raw_arg.to_be_bytes();
126
127                if exp_ocr.busy() {
128                    let exp_err = Error::invalid_field_variant("cmd::arg::ocr", raw_arg as usize);
129
130                    assert_eq!(Argument::try_from_bits(raw_arg), Err(exp_err));
131                    assert_eq!(Argument::try_from_bytes(&raw), Err(exp_err));
132                    assert_eq!(Argument::try_from(&raw), Err(exp_err));
133                    assert_eq!(Argument::try_from(raw), Err(exp_err));
134                } else {
135                    assert_eq!(Argument::try_from_bits(raw_arg), Ok(exp_arg));
136                    assert_eq!(Argument::try_from_bytes(&raw), Ok(exp_arg));
137                    assert_eq!(Argument::try_from(&raw), Ok(exp_arg));
138                    assert_eq!(Argument::try_from(raw), Ok(exp_arg));
139
140                    assert_eq!(exp_arg.bits(), raw_arg);
141                    assert_eq!(exp_arg.bytes(), raw);
142
143                    assert_eq!(exp_arg.ocr(), exp_ocr);
144
145                    exp_arg.set_ocr(new_ocr);
146                    assert_eq!(exp_arg.ocr(), new_ocr);
147
148                    exp_arg.set_ocr(exp_ocr);
149                    assert_eq!(exp_arg.ocr(), exp_ocr);
150                }
151            });
152    }
153}
sdmmc_core/command/class/class0/cmd1/arg.rs

sdmmc_core/command/class/class0/cmd1/
arg.rs
