[−][src]Trait embedded_dma::ReadBuffer
Trait for buffers that can be given to DMA for reading.
Safety
The implementing type must be safe to use for DMA reads. This means:
- It must be a pointer that references the actual buffer.
- As long as no
&mut self
method is called on the implementing object:read_buffer
must always return the same value, if called multiple times.- The memory specified by the pointer and size returned by
read_buffer
must not be freed as long asself
is not dropped.
Associated Types
type Word
Required methods
unsafe fn read_buffer(&self) -> (*const Self::Word, usize)
Provide a buffer usable for DMA reads.
The return value is:
- pointer to the start of the buffer
- buffer size in words
Safety
Once this method has been called, it is unsafe to call any &mut self
methods on this object as long as the returned value is in use (by DMA).
Implementors
impl<B, T: ?Sized> ReadBuffer for B where
B: Deref<Target = T> + StableDeref,
T: ReadTarget,
[src]
B: Deref<Target = T> + StableDeref,
T: ReadTarget,