crab-usb 0.6.3

A usb host for embedded systems, written in Rust.
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

use alloc::boxed::Box;
use alloc::vec::Vec;

use crate::backend::BackendOp;
use crate::backend::ty::*;
use crate::err::Result;

#[cfg(kmod)]
pub use super::backend::kmod::*;

#[cfg(umod)]
pub use super::backend::umod::*;

pub use crate::device::{Device, DeviceInfo};

/// USB 主机控制器
pub struct USBHost {
    pub(crate) backend: Box<dyn BackendOp>,
}

impl USBHost {
    /// 初始化主机控制器
    pub async fn init(&mut self) -> Result<()> {
        self.backend.init().await?;
        Ok(())
    }

    pub async fn probe_devices(&mut self) -> Result<Vec<DeviceInfo>> {
        let device_infos = self.backend.device_list().await?;
        let mut devices = Vec::new();
        for dev in device_infos {
            let dev_info = DeviceInfo { inner: dev };
            devices.push(dev_info);
        }
        Ok(devices)
    }

    #[cfg(kmod)]
    pub fn create_event_handler(&mut self) -> EventHandler {
        let handler = self.backend.create_event_handler();
        EventHandler { handler }
    }

    pub async fn open_device(&mut self, dev: &DeviceInfo) -> Result<Device> {
        let device = self.backend.open_device(dev.inner.as_ref()).await?;
        let mut device: Device = device.into();
        device.init().await?;
        Ok(device)
    }
}

pub struct EventHandler {
    handler: Box<dyn EventHandlerOp>,
}

impl EventHandler {
    /// 处理事件
    pub fn handle_event(&self) -> Event {
        self.handler.handle_event()
    }
}