vlfd_rs/
error.rs

1use rusb::Error as UsbLibError;
2use std::fmt;
3
4pub type Result<T> = std::result::Result<T, Error>;
5
6#[derive(Debug)]
7pub enum Error {
8    DeviceNotOpen,
9    DeviceNotFound {
10        vid: u16,
11        pid: u16,
12    },
13    FeatureUnavailable(&'static str),
14    InvalidBitfile(&'static str),
15    NotProgrammed,
16    Timeout(&'static str),
17    UnexpectedResponse(&'static str),
18    VersionMismatch {
19        expected: u16,
20        actual: u16,
21    },
22    Usb {
23        source: UsbLibError,
24        context: &'static str,
25    },
26    Io(std::io::Error),
27}
28
29impl fmt::Display for Error {
30    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
31        match self {
32            Error::DeviceNotOpen => write!(f, "device is not open"),
33            Error::DeviceNotFound { vid, pid } => {
34                write!(f, "device {vid:#06x}:{pid:#06x} not found")
35            }
36            Error::FeatureUnavailable(feature) => write!(f, "feature `{feature}` is unavailable"),
37            Error::InvalidBitfile(reason) => write!(f, "invalid bitfile: {reason}"),
38            Error::NotProgrammed => write!(f, "FPGA is not programmed"),
39            Error::Timeout(context) => write!(f, "operation `{context}` timed out"),
40            Error::UnexpectedResponse(context) => {
41                write!(f, "unexpected response during `{context}`")
42            }
43            Error::VersionMismatch { expected, actual } => write!(
44                f,
45                "SMIMS version mismatch (expected {expected:#06x}, found {actual:#06x})"
46            ),
47            Error::Usb { source, context } => {
48                write!(f, "usb error {source} in `{context}`")
49            }
50            Error::Io(err) => err.fmt(f),
51        }
52    }
53}
54
55impl std::error::Error for Error {
56    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
57        match self {
58            Error::Usb { source, .. } => Some(source),
59            Error::Io(err) => Some(err),
60            _ => None,
61        }
62    }
63}
64
65impl From<std::io::Error> for Error {
66    fn from(value: std::io::Error) -> Self {
67        Self::Io(value)
68    }
69}
vlfd_rs/error.rs

vlfd_rs/
error.rs
