embedded-hal 1.0.0-alpha.4

A Hardware Abstraction Layer (HAL) for embedded systems
Documentation 
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//! Random Number Generator Interface

use nb;

/// Nonblocking stream of random bytes.
pub trait Read {
    /// An enumeration of RNG errors.
    ///
    /// For infallible implementations, will be `Infallible`
    type Error;

    /// Get a number of bytes from the RNG.
    fn try_read(&mut self, buf: &mut [u8]) -> nb::Result<usize, Self::Error>;
}