Struct EndpointState 

pub struct EndpointState<const COUNT: usize = MAX_ENDPOINTS> { /* private fields */ }

Driver state associated with endpoints.

Each USB driver needs an EndpointState. Allocate a static object and supply it to your USB constructor. Make sure that states are not shared across USB instances; otherwise, the driver constructor panics.

Use max_endpoints() if you’re not interested in reducing the memory used by this allocation. The default object holds enough state for all supported endpoints.

use imxrt_usbd::EndpointState;

static EP_STATE: EndpointState = EndpointState::max_endpoints();

If you know that you can use fewer endpoints, you can control the memory utilization with the const generic COUNT. You’re expected to provide at least two endpoints – one in each direction – for control endpoints.

Know that endpoints are allocated in pairs; all even endpoints are OUT, and all odd endpoints are IN. For example, a COUNT of 5 will have 3 out endpoints, and 2 in endpoints. You can never have more IN that OUT endpoints without overallocating OUT endpoints.

use imxrt_usbd::EndpointState;

static EP_STATE: EndpointState<5> = EndpointState::new();

Any endpoint state allocated beyond MAX_ENDPOINTS are wasted.

Implementations

impl EndpointState<MAX_ENDPOINTS>

pub const fn max_endpoints() -> Self

Allocate space for the maximum number of endpoints.

Use this if you don’t want to consider the exact number of endpoints that you might need.

impl<const COUNT: usize> EndpointState<COUNT>

pub const fn new() -> Self

Allocate state for COUNT endpoints.

Trait Implementations

impl<const COUNT: usize> Default for EndpointState<COUNT>

fn default() -> Self

Returns the “default value” for a type.

impl<const COUNT: usize> Sync for EndpointState<COUNT>