sdmmc_core/command/class/class0/cmd13/
arg.rs

1use crate::lib_bitfield;
2use crate::result::{Error, Result};
3
4mod task_status;
5
6pub use task_status::*;
7
8lib_bitfield! {
9    /// Argumentument for CMD10.
10    pub Argument(u32): u16 {
11        /// Programs the RCA value for CSD on the CMD line.
12        raw_rca: 31, 16;
13        raw_send_task_status: 15;
14    }
15}
16
17impl Argument {
18    /// Represents the byte length of the [Argument].
19    pub const LEN: usize = 4;
20    /// Represents the default value of the [Argument].
21    pub const DEFAULT: u32 = 0x0000;
22
23    /// Creates a new [Argument].
24    pub const fn new() -> Self {
25        Self(Self::DEFAULT)
26    }
27
28    /// Gets the `RCA` field for the card select on the CMD line.
29    pub const fn rca(&self) -> u16 {
30        self.raw_rca()
31    }
32
33    /// Sets the `RCA` field for the card select on the CMD line.
34    pub fn set_rca(&mut self, val: u16) {
35        self.set_raw_rca(val as u32)
36    }
37
38    /// Gets the `Send Task Status Register` field of the [Argument].
39    pub const fn send_task_status(&self) -> SendTaskStatus {
40        SendTaskStatus::from_bool(self.raw_send_task_status())
41    }
42
43    /// Sets the `Send Task Status Register` field of the [Argument].
44    pub fn set_send_task_status(&mut self, val: SendTaskStatus) {
45        self.set_raw_send_task_status(val.into_bool());
46    }
47
48    /// Converts a [`u32`] into an [Argument].
49    pub const fn from_bits(val: u32) -> Self {
50        Self(val)
51    }
52
53    /// Attempts to convert a [`u32`] into an [Argument].
54    pub const fn try_from_bits(val: u32) -> Result<Self> {
55        Ok(Self::from_bits(val))
56    }
57
58    /// Converts the [Argument] into a byte array.
59    pub const fn bytes(&self) -> [u8; Self::LEN] {
60        self.0.to_be_bytes()
61    }
62
63    /// Attempts to convert a byte slice into an [Argument].
64    pub const fn try_from_bytes(val: &[u8]) -> Result<Self> {
65        match val.len() {
66            len if len < Self::LEN => Err(Error::invalid_length(len, Self::LEN)),
67            _ => Ok(Self::from_bits(u32::from_be_bytes([
68                val[0], val[1], val[2], val[3],
69            ]))),
70        }
71    }
72}
73
74impl Default for Argument {
75    fn default() -> Self {
76        Self::new()
77    }
78}
79
80impl From<u32> for Argument {
81    fn from(val: u32) -> Self {
82        Self::from_bits(val)
83    }
84}
85
86impl From<Argument> for u32 {
87    fn from(val: Argument) -> Self {
88        val.bits()
89    }
90}
91
92impl From<Argument> for [u8; Argument::LEN] {
93    fn from(val: Argument) -> Self {
94        val.bytes()
95    }
96}
97
98impl TryFrom<&[u8]> for Argument {
99    type Error = Error;
100
101    fn try_from(val: &[u8]) -> Result<Self> {
102        Self::try_from_bytes(val)
103    }
104}
105
106impl<const N: usize> TryFrom<&[u8; N]> for Argument {
107    type Error = Error;
108
109    fn try_from(val: &[u8; N]) -> Result<Self> {
110        Self::try_from_bytes(val.as_ref())
111    }
112}
113
114impl<const N: usize> TryFrom<[u8; N]> for Argument {
115    type Error = Error;
116
117    fn try_from(val: [u8; N]) -> Result<Self> {
118        Self::try_from_bytes(val.as_ref())
119    }
120}
121
122#[cfg(test)]
123mod tests {
124    use super::*;
125
126    #[test]
127    fn test_fields() {
128        (1..=u16::BITS)
129            .map(|r| ((1u32 << r) - 1) as u16)
130            .for_each(|rca| {
131                let raw = (rca as u32) << 16;
132                let raw_bytes = raw.to_be_bytes();
133
134                let mut exp_arg = Argument(raw);
135
136                assert_eq!(Argument::try_from_bits(raw), Ok(exp_arg));
137                assert_eq!(Argument::from_bits(raw), exp_arg);
138                assert_eq!(Argument::from(raw), exp_arg);
139
140                assert_eq!(Argument::try_from_bytes(&raw_bytes), Ok(exp_arg));
141                assert_eq!(Argument::try_from(raw_bytes), Ok(exp_arg));
142                assert_eq!(Argument::try_from(&raw_bytes), Ok(exp_arg));
143
144                assert_eq!(exp_arg.bytes(), raw_bytes);
145                assert_eq!(<[u8; Argument::LEN]>::from(exp_arg), raw_bytes);
146
147                assert_eq!(exp_arg.rca(), rca);
148
149                exp_arg.set_rca(0);
150                assert_eq!(exp_arg.rca(), 0);
151
152                exp_arg.set_rca(rca);
153                assert_eq!(exp_arg.rca(), rca);
154            });
155    }
156}
sdmmc_core/command/class/class0/cmd13/arg.rs

sdmmc_core/command/class/class0/cmd13/
arg.rs
