usb2 0.0.1

USB 2.0 data types and packet parser
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

//! Class Communication Device

use core::num::NonZeroU8;

pub mod acm;
pub mod call;
pub mod header;
pub mod union;

/// Communication Device Class
#[derive(Clone, Copy)]
pub enum Class {
    /// Communications Interface Class
    Communications {
        /// Communications class subclass
        subclass: SubClass,
        /// Communications class protocol
        protocol: Protocol,
    },

    /// Data interface class
    CdcData,
}

impl Class {
    /// Class byte
    pub fn class(&self) -> NonZeroU8 {
        unsafe {
            NonZeroU8::new_unchecked(match self {
                Class::Communications { .. } => 2,
                Class::CdcData => 10,
            })
        }
    }

    /// SubClass byte
    pub fn subclass(&self) -> u8 {
        match self {
            Class::Communications { subclass, .. } => *subclass as u8,
            Class::CdcData => 0,
        }
    }

    /// Protocol byte
    pub fn protocol(&self) -> u8 {
        match self {
            Class::Communications { protocol, .. } => *protocol as u8,
            Class::CdcData => 0,
        }
    }
}

/// Communications Class Subclass codes
#[derive(Clone, Copy)]
pub enum SubClass {
    /// Abstract Control Model
    AbstractControlModel = 0x02,
}

/// Communications Class Protocol codes
#[derive(Clone, Copy)]
pub enum Protocol {
    /// AT Commands
    ATCommands = 1,
}

const CS_INTERFACE: u8 = 0x24;

const SUBTYPE_HEADER: u8 = 0x00;
const SUBTYPE_CALL: u8 = 0x01;
const SUBTYPE_ACM: u8 = 0x02;
const SUBTYPE_UNION: u8 = 0x06;