usb_host

Trait USBHost

Source 
pub trait USBHost {
    // 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>;
    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>;
}
Expand description

Trait for host controller interface.

Required Methods§

Source

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.

Source

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.

Source

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§