Merge pull request #94 from Sh3Rm4n/clippy

Deal with a few warnings

Author: Sh3Rm4n

examples/usb_serial.rs

@@ -98,6 +98,6 @@ fn main() -> ! {
             _ => {}
         }
 
-        led.set_low(); // Turn off
+        led.set_low().ok(); // Turn off
     }
 }

src/time.rs

@@ -102,12 +102,12 @@ impl MonoTimer {
     }
 
     /// Returns the frequency at which the monotonic timer is operating at
-    pub fn frequency(&self) -> Hertz {
+    pub fn frequency(self) -> Hertz {
         self.frequency
     }
 
     /// Returns an `Instant` corresponding to "now"
-    pub fn now(&self) -> Instant {
+    pub fn now(self) -> Instant {
         Instant {
             now: DWT::get_cycle_count(),
         }
@@ -122,7 +122,7 @@ pub struct Instant {
 
 impl Instant {
     /// Ticks elapsed since the `Instant` was created
-    pub fn elapsed(&self) -> u32 {
+    pub fn elapsed(self) -> u32 {
         DWT::get_cycle_count().wrapping_sub(self.now)
     }
 }

src/usb.rs

@@ -30,7 +30,7 @@ unsafe impl UsbPeripheral for Peripheral {
     const EP_MEMORY_SIZE: usize = 1024;
 
     fn enable() {
-        let rcc = unsafe { (&*RCC::ptr()) };
+        let rcc = unsafe { &*RCC::ptr() };
 
         cortex_m::interrupt::free(|_| {
             // Enable USB peripheral