import { BitValue, Line } from 'libgpiod';
import { GPIOLineReservation } from './gpio-line-reservation';
export declare class GPIOOutputLine extends GPIOLineReservation {
    private lastValue;
    constructor(line: Line, initialValue: BitValue, releaseCallback: () => void);
    /**
     * Set the value and optionally sleep afterward
     * @param value
     * @param uSleep (optional) number of microseconds to sleep after setting the value
     */
    setValue(value: BitValue, uSleep?: number): void;
    getLastSetValue(): BitValue;
    /**
     * @brief sets the specified value for the specified time span and then sets the opposite value
     * @param value pulse value
     * @param usec pulse width in microseconds
     * Use to generate short triggering pulses.
     */
    trigger(value: BitValue, usec: number): void;
}
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