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VfdConfig

Struct VfdConfig 

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pub struct VfdConfig {
    pub serial: SerialSettings,
    pub display: DisplaySettings,
    pub queue_capacity: usize,
}
Expand description

Полная конфигурация VFD: serial transport плюс геометрия/протокол дисплея.

Один и тот же VfdConfig используется sync и Tokio API. queue_capacity влияет только на worker-обёртки; низкоуровневый crate::Vfd открывает порт напрямую.

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§serial: SerialSettings

Настройки serial-порта.

§display: DisplaySettings

Настройки дисплея.

§queue_capacity: usize

Ёмкость очереди фонового worker.

Используется только crate::VfdWorker и escpos_vfd::tokio::AsyncVfdWorker. Значение 32 по умолчанию даёт backpressure без бесконтрольного роста памяти.

Implementations§

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impl VfdConfig

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pub fn new( serial: SerialSettings, display: DisplaySettings, ) -> Result<Self, ConfigError>

Создаёт полностью ручную конфигурацию.

Метод сразу валидирует serial и display настройки, поэтому ошибки конфигурации возвращаются до попытки открыть устройство.

§Ошибки

Возвращает ConfigError, если serial, display или queue_capacity содержат недопустимые значения.

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pub fn preset( port_name: impl Into<String>, preset: Preset, ) -> Result<Self, ConfigError>

Создаёт конфигурацию из пресета.

Preset::Epson20x2Cp866 воспроизводит прежние настройки библиотеки: 20x2, 9600 baud, CP866, ESC @, ESC t 6 и яркость 1..=4.

§Ошибки

Возвращает ConfigError::EmptyPortName, если имя порта пустое.

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pub fn with_queue_capacity(self, capacity: usize) -> Result<Self, ConfigError>

Устанавливает ёмкость bounded-очереди worker.

Значение 0 запрещено: такая очередь не смогла бы принять даже команду shutdown.

§Ошибки

Возвращает ConfigError::ZeroQueueCapacity при capacity = 0.

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pub fn validate(&self) -> Result<(), ConfigError>

Проверяет serial и display настройки.

§Ошибки

Возвращает первый найденный ConfigError.

Trait Implementations§

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impl Clone for VfdConfig

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fn clone(&self) -> VfdConfig

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for VfdConfig

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

Formats the value using the given formatter. Read more
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impl Eq for VfdConfig

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impl PartialEq for VfdConfig

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fn eq(&self, other: &VfdConfig) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more
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impl StructuralPartialEq for VfdConfig

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.