Trait DmaDirection 

pub trait DmaDirection: Debug + Sealed {
    const CAN_READ: bool;
    const CAN_WRITE: bool;
}

Compile-time direction constraint for DMA buffers.

Implemented by three marker types:

• DmaToDevice : write-only from the CPU perspective
• DmaFromDevice : read-only from the CPU perspective
• DmaBidirectional : full read/write

The associated constants are checked at compile time via const { assert!(D::CAN_READ) } blocks, preventing e.g. reading from a write-only buffer at zero runtime cost.

Required Associated Constants

const CAN_READ: bool

Whether the CPU may read data transferred from the device.

const CAN_WRITE: bool

Whether the CPU may write data to be transferred to the device.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl DmaDirection for DmaBidirectional

const CAN_READ: bool = true

const CAN_WRITE: bool = true

impl DmaDirection for DmaFromDevice

const CAN_READ: bool = true

const CAN_WRITE: bool = false

impl DmaDirection for DmaToDevice

const CAN_READ: bool = false

const CAN_WRITE: bool = true