diff options
Diffstat (limited to 'usbh/src/pipe.rs')
| -rw-r--r-- | usbh/src/pipe.rs | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/usbh/src/pipe.rs b/usbh/src/pipe.rs index 3dab629..388b518 100644 --- a/usbh/src/pipe.rs +++ b/usbh/src/pipe.rs @@ -21,14 +21,19 @@ use atsamd_hal::target_device::usb::{ use core::convert::TryInto; use log::{debug, trace}; -// TODO: verify this timeout against §9.2.6.1 of USB 2.0 spec. +// Maximum time to wait for a control request with data to finish. cf +// §9.2.6.1 of USB 2.0. const USB_TIMEOUT: usize = 5 * 1024; // 5 Seconds // samd21 only supports 8 pipes. const MAX_PIPES: usize = 8; +// How many times to retry a transaction that has transient errors. const NAK_LIMIT: usize = 15; +// For use in control requests that do not require a data stage. +pub(crate) const NO_DATA_STAGE: Option<&mut ()> = None; + #[derive(Copy, Clone, Debug, PartialEq)] pub(crate) enum PipeErr { ShortPacket, |