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use eps_api::{EpsError, EpsResult};
use rust_i2c::Command;
#[derive(Clone, Debug, Eq, PartialEq)]
pub enum ErrorCode {
None = 0x00,
UnknownCommand = 0x01,
CommandDataIncorrect = 0x02,
ChannelDoesNotExist = 0x03,
ChannelInactive = 0x04,
BadCRC = 0x10,
ResetOccurred = 0x13,
BadADCAcquisition = 0x14,
FailReadingEEPROM = 0x20,
InternalSPIError = 0x30,
CommandError = 0xFF,
UnknownError,
}
impl ErrorCode {
fn from_u8(value: u8) -> ErrorCode {
match value {
0x00 => ErrorCode::None,
0x01 => ErrorCode::UnknownCommand,
0x02 => ErrorCode::CommandDataIncorrect,
0x03 => ErrorCode::ChannelDoesNotExist,
0x04 => ErrorCode::ChannelInactive,
0x10 => ErrorCode::BadCRC,
0x13 => ErrorCode::ResetOccurred,
0x14 => ErrorCode::BadADCAcquisition,
0x20 => ErrorCode::FailReadingEEPROM,
0x30 => ErrorCode::InternalSPIError,
0xFF => ErrorCode::CommandError,
_ => ErrorCode::UnknownError,
}
}
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct LastError {
pub motherboard: ErrorCode,
pub daughterboard: Option<ErrorCode>,
}
pub fn parse(data: &[u8]) -> EpsResult<LastError> {
if data.len() == 2 {
Ok(LastError {
motherboard: ErrorCode::from_u8(data[1]),
daughterboard: None,
})
} else if data.len() == 4 {
Ok(LastError {
motherboard: ErrorCode::from_u8(data[1]),
daughterboard: Some(ErrorCode::from_u8(data[3])),
})
} else {
Err(EpsError::parsing_failure("Last Error"))
}
}
pub fn command() -> (Command, usize) {
(
Command {
cmd: 0x03,
data: vec![0x00],
},
4,
)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_parse_motherboard() {
assert_eq!(
LastError {
motherboard: ErrorCode::BadCRC,
daughterboard: None,
},
parse(&[0x00, 0x10]).unwrap()
);
}
#[test]
fn test_parse_motherboard_daughterboard() {
assert_eq!(
LastError {
motherboard: ErrorCode::CommandDataIncorrect,
daughterboard: Some(ErrorCode::ChannelInactive),
},
parse(&[0x00, 0x02, 0x00, 0x04]).unwrap()
);
}
#[test]
fn test_parse_bad_data_len() {
assert_eq!(
EpsError::parsing_failure("Last Error"),
parse(&[]).err().unwrap()
);
}
}