sdmmc-core 0.5.0

SD/MMC core data structures and algorithms
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140

use crate::lib_bitfield;
use crate::register::IoOcr;
use crate::result::{Error, Result};

lib_bitfield! {
    /// Argumentument for CMD5.
    pub Argument(u32): u32 {
        /// Switching 1.8V request.
        pub s18r: 24;
        raw_io_ocr: 23, 0;
    }
}

impl Argument {
    /// Represents the byte length of the [Argument].
    pub const LEN: usize = 4;
    /// Represents the raw default value of the [Argument].
    pub const DEFAULT: u32 = 1;

    /// Creates a new [Argument].
    pub const fn new() -> Self {
        Self(1)
    }

    /// Gets the I/O Operation Conditions Register ([IoOcr]) value.
    pub const fn io_ocr(&self) -> IoOcr {
        IoOcr::from_bits(self.raw_io_ocr())
    }

    /// Sets the I/O Operation Conditions Register ([IoOcr]) value.
    pub fn set_io_ocr(&mut self, val: IoOcr) {
        self.set_raw_io_ocr(val.bits());
    }

    /// Converts a [`u32`] into an [Argument].
    pub const fn from_bits(val: u32) -> Self {
        Self(val)
    }

    /// Attempts to convert a [`u32`] into an [Argument].
    pub const fn try_from_bits(val: u32) -> Result<Self> {
        Ok(Self::from_bits(val))
    }

    /// Converts the [Argument] into a byte array.
    pub const fn bytes(&self) -> [u8; Self::LEN] {
        self.0.to_be_bytes()
    }

    /// Attempts to convert a byte slice into an [Argument].
    pub const fn try_from_bytes(val: &[u8]) -> Result<Self> {
        match val.len() {
            len if len < Self::LEN => Err(Error::invalid_length(len, Self::LEN)),
            _ => Ok(Self(u32::from_be_bytes([val[0], val[1], val[2], val[3]]))),
        }
    }
}

impl Default for Argument {
    fn default() -> Self {
        Self::new()
    }
}

impl From<u32> for Argument {
    fn from(val: u32) -> Self {
        Self::from_bits(val)
    }
}

impl From<Argument> for u32 {
    fn from(val: Argument) -> Self {
        val.bits()
    }
}

impl From<Argument> for [u8; Argument::LEN] {
    fn from(val: Argument) -> Self {
        val.bytes()
    }
}

impl TryFrom<&[u8]> for Argument {
    type Error = Error;

    fn try_from(val: &[u8]) -> Result<Self> {
        Self::try_from_bytes(val)
    }
}

impl<const N: usize> TryFrom<&[u8; N]> for Argument {
    type Error = Error;

    fn try_from(val: &[u8; N]) -> Result<Self> {
        Self::try_from_bytes(val.as_ref())
    }
}

impl<const N: usize> TryFrom<[u8; N]> for Argument {
    type Error = Error;

    fn try_from(val: [u8; N]) -> Result<Self> {
        Self::try_from_bytes(val.as_ref())
    }
}

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

    #[test]
    fn test_fields() {
        let mut arg = Argument::new();

        let mut io_ocr = arg.io_ocr();

        test_field!(io_ocr, vdd_2021: 8);
        test_field!(io_ocr, vdd_2122: 9);
        test_field!(io_ocr, vdd_2223: 10);
        test_field!(io_ocr, vdd_2324: 11);
        test_field!(io_ocr, vdd_2425: 12);
        test_field!(io_ocr, vdd_2526: 13);
        test_field!(io_ocr, vdd_2627: 14);
        test_field!(io_ocr, vdd_2728: 15);
        test_field!(io_ocr, vdd_2829: 16);
        test_field!(io_ocr, vdd_2930: 17);
        test_field!(io_ocr, vdd_3031: 18);
        test_field!(io_ocr, vdd_3132: 19);
        test_field!(io_ocr, vdd_3233: 20);
        test_field!(io_ocr, vdd_3334: 21);
        test_field!(io_ocr, vdd_3435: 22);
        test_field!(io_ocr, vdd_3536: 23);

        arg.set_io_ocr(io_ocr);
        assert_eq!(arg.io_ocr(), io_ocr);

        test_field!(arg, s18r: 24);
    }
}