Enum Error 

pub enum Error<InnerError> {
    ValueOutOfBounds(u16),
    WriteSizeExceeded,
    StartingChannelMismatch,
    I2CError(InnerError),
}

Error type for the crate, which can represent either an error from this driver or an inner error that comes from the I2C type.

Variants

ValueOutOfBounds(u16)

A value was larger than the DAC supports.

The MCP4728 is a 12-bit DAC, so values that it writes must be smaller than 2^12.

WriteSizeExceeded

MCP4728::multi_write can write an arbitrary number of updates, so it is impossible to statically allocate a buffer to write using the embedded_hal::i2c::I2c trait. To work around this, we will use a buffer large enough to contain four writes at a time and return Error::WriteSizeExceeded if more writes are requested. This is unlikely to be a limitation given that there are four channels.

StartingChannelMismatch

A sequential write command was issued with a list of updates that didn’t match the associated starting channel.

For example, a sequential write command that starts with channel B must contain 3 updates: for channels B, C, and D.

I2CError(InnerError)

Error representing an error that came from the inner I2C driver.

Trait Implementations

impl<InnerError: Debug> Debug for Error<InnerError>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<InnerError> From<InnerError> for Error<InnerError>

fn from(inner: InnerError) -> Self

Converts to this type from the input type.

impl<InnerError: PartialEq> PartialEq for Error<InnerError>

fn eq(&self, other: &Error<InnerError>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<InnerError: Eq> Eq for Error<InnerError>

impl<InnerError> StructuralPartialEq for Error<InnerError>