Merge pull request #61 from xoviat/us-delay

add us delays

embassy/src/time/duration.rs

@@ -22,6 +22,10 @@ impl Duration {
         self.ticks * 1000 / TICKS_PER_SECOND
     }
 
+    pub const fn as_micros(&self) -> u64 {
+        self.ticks * 1_000_000 / TICKS_PER_SECOND
+    }
+
     pub const fn from_ticks(ticks: u64) -> Duration {
         Duration { ticks }
     }
@@ -38,6 +42,15 @@ impl Duration {
         }
     }
 
+    /*
+        NOTE: us delays may not be as accurate
+    */
+    pub const fn from_micros(millis: u64) -> Duration {
+        Duration {
+            ticks: millis * TICKS_PER_SECOND / 1_000_000,
+        }
+    }
+
     pub fn checked_add(self, rhs: Duration) -> Option<Duration> {
         self.ticks
             .checked_add(rhs.ticks)