From 9238350077c02732fbeb66d1ec9dc5813a9d836e Mon Sep 17 00:00:00 2001
From: Hanno Braun <hanno@braun-robotics.com>
Date: Tue, 24 Oct 2017 12:06:04 +0200
Subject: [PATCH] Add `flush` method to `serial::Write`

---
 src/serial.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/serial.rs b/src/serial.rs
index 6f164669e..16345547f 100644
--- a/src/serial.rs
+++ b/src/serial.rs
@@ -26,4 +26,7 @@ pub trait Write<Word> {
 
     /// Writes a single word to the serial interface
     fn write(&mut self, word: Word) -> nb::Result<(), Self::Error>;
+
+    /// Ensures that none of the previously written words are still buffered
+    fn flush(&mut self) -> nb::Result<(), Self::Error>;
 }