From 74e6b5c54c1a28642ab827b037e7c4e76c0329b2 Mon Sep 17 00:00:00 2001
From: "N. Kartoredjo" <nskartoredjo@users.noreply.github.com>
Date: Tue, 13 Feb 2024 20:25:51 +0000
Subject: [PATCH 1/2] Fix write timeout for COM ports

---
 src/windows/com.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/windows/com.rs b/src/windows/com.rs
index 662cc196..5573ab77 100644
--- a/src/windows/com.rs
+++ b/src/windows/com.rs
@@ -240,14 +240,14 @@ impl SerialPort for COMPort {
     }
 
     fn set_timeout(&mut self, timeout: Duration) -> Result<()> {
-        let milliseconds = timeout.as_secs() * 1000 + timeout.subsec_nanos() as u64 / 1_000_000;
+        let milliseconds = timeout.as_millis();
 
         let mut timeouts = COMMTIMEOUTS {
             ReadIntervalTimeout: 0,
             ReadTotalTimeoutMultiplier: 0,
             ReadTotalTimeoutConstant: milliseconds as DWORD,
             WriteTotalTimeoutMultiplier: 0,
-            WriteTotalTimeoutConstant: 0,
+            WriteTotalTimeoutConstant: milliseconds as DWORD,
         };
 
         if unsafe { SetCommTimeouts(self.handle, &mut timeouts) } == 0 {

From 24d2bffbbac8f7c30b1ee8b257a3e22457c639ec Mon Sep 17 00:00:00 2001
From: Nando Kartoredjo <nando.kartoredjo@dotrobotsystems.com>
Date: Fri, 16 Feb 2024 00:37:21 +0100
Subject: [PATCH 2/2] Add the fix to the changelog

---
 CHANGELOG.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 79ededc9..0f04b56c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,9 @@ project adheres to [Semantic Versioning](https://semver.org/).
 ### Fixed
 * Fixes a bug where `available_ports()` returned disabled devices on Windows.
   [#144](https://github.com/serialport/serialport-rs/pull/144)
+* Fixes a bug on Windows where the `WriteTotalTimeoutConstant` field hasn't been
+  configured properly when the `set_timeout` method is called.
+  [#124](https://github.com/serialport/serialport-rs/issues/124)
 
 ### Removed