Trait usb_host::USBHost

pub trait USBHost {
    fn control_transfer(
        &mut self,
        ep: &mut dyn Endpoint,
        bm_request_type: RequestType,
        b_request: RequestCode,
        w_value: WValue,
        w_index: u16,
        buf: Option<&mut [u8]>
    ) -> Result<usize, TransferError>;
    fn in_transfer(
        &mut self,
        ep: &mut dyn Endpoint,
        buf: &mut [u8]
    ) -> Result<usize, TransferError>;
    fn out_transfer(
        &mut self,
        ep: &mut dyn Endpoint,
        buf: &[u8]
    ) -> Result<usize, TransferError>;
}

Trait for host controller interface.

Required Methods

fn control_transfer(
    &mut self,
    ep: &mut dyn Endpoint,
    bm_request_type: RequestType,
    b_request: RequestCode,
    w_value: WValue,
    w_index: u16,
    buf: Option<&mut [u8]>
) -> Result<usize, TransferError>

Issue a control transfer with an optional data stage to ep. The data stage direction is determined by the direction of bm_request_type.

On success, the amount of data transferred into buf is returned.

fn in_transfer(
    &mut self,
    ep: &mut dyn Endpoint,
    buf: &mut [u8]
) -> Result<usize, TransferError>

Issue a transfer from ep to the host.

On success, the amount of data transferred into buf is returned.

fn out_transfer(
    &mut self,
    ep: &mut dyn Endpoint,
    buf: &[u8]
) -> Result<usize, TransferError>

Issue a transfer from the host to ep.

On success, the amount of data transferred from buf is returned. This should always be equal to buf.len().

Implementors