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-rw-r--r--usbh/src/pipe/addr.rs14
1 files changed, 12 insertions, 2 deletions
diff --git a/usbh/src/pipe/addr.rs b/usbh/src/pipe/addr.rs
index 8b92177..3ff2d2d 100644
--- a/usbh/src/pipe/addr.rs
+++ b/usbh/src/pipe/addr.rs
@@ -27,8 +27,16 @@ impl Addr {
{
let mut w = W { bits: self.0 };
f(&mut w);
- // Address must be 32-bit aligned.
- assert!((w.bits & 0x3) == 0);
+ self.0 = w.bits;
+ }
+
+ pub fn modify<F>(&mut self, f: F)
+ where
+ for<'w> F: FnOnce(&R, &'w mut W) -> &'w mut W,
+ {
+ let r = R { bits: self.0 };
+ let mut w = W { bits: self.0 };
+ f(&r, &mut w);
self.0 = w.bits;
}
}
@@ -79,6 +87,8 @@ pub(crate) struct AddrW<'a> {
}
impl<'a> AddrW<'a> {
pub unsafe fn bits(self, v: u32) -> &'a mut W {
+ // Address must be 32-bit aligned.
+ assert!((v & 0x3) == 0);
self.w.bits = v;
self.w
}