Handle for a USB endpoint. The endpoint direction is constrained by the D
type argument, which
must be either In
or Out
.
Gets the endpoint address including direction bit.
Gets the endpoint transfer type.
Gets the maximum packet size for the endpoint.
Gets the poll interval for interrupt endpoints.
Sets the STALL condition for the endpoint.
Clears the STALL condition of the endpoint.
Writes a single packet of data to the specified endpoint and returns number of bytes
actually written.
The only reason for a short write is if the caller passes a slice larger than the amount of
memory allocated earlier, and this is generally an error in the class implementation.
Note: USB bus implementation errors are directly passed through, so be prepared to handle
other errors as well.
Reads a single packet of data from the specified endpoint and returns the actual length of
the packet.
This should also clear any NAK flags and prepare the endpoint to receive the next packet.
Note: USB bus implementation errors are directly passed through, so be prepared to handle
other errors as well.
InvalidEndpoint
- The ep_addr
does not point to a
valid endpoint that was previously allocated with UsbBus::alloc_ep
.
WouldBlock
- There is no packet to be read. Note that
this is different from a received zero-length packet, which is valid in USB. A zero-length
packet will return Ok(0)
.
BufferOverflow
- The received packet is too long to
fix in buf
. This is generally an error in the class implementation.
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from
)
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from
)
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
🔬 This is a nightly-only experimental API. (get_type_id
)
this method will likely be replaced by an associated static