From dea1ae15182d75c2b521817378480707babadbdb Mon Sep 17 00:00:00 2001
From: Jef Driesen <jefdriesen@users.sourceforge.net>
Date: Sun, 24 Feb 2008 19:52:12 +0000
Subject: [PATCH] Added a function to assert or clear a break condition.

---
 serial.h       |  1 +
 serial_posix.c | 19 ++++++++++++++++++-
 serial_win32.c | 21 +++++++++++++++++++++
 3 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/serial.h b/serial.h
index 6527aaf..acd4d8c 100644
--- a/serial.h
+++ b/serial.h
@@ -68,6 +68,7 @@ int serial_drain (serial *device);
 
 int serial_send_break (serial *device);
 
+int serial_set_break (serial *device, int level);
 int serial_set_dtr (serial *device, int level);
 int serial_set_rts (serial *device, int level);
 
diff --git a/serial_posix.c b/serial_posix.c
index eb21c29..34ac6fc 100644
--- a/serial_posix.c
+++ b/serial_posix.c
@@ -457,7 +457,7 @@ serial_read (serial* device, void* data, unsigned int size)
 				TRACE ("gettimeofday");
 				return -1;
 			}
-			timersub (&now, &timestamp ,&delta);
+			timersub (&now, &timestamp, &delta);
 			long elapsed = delta.tv_sec * 1000 + delta.tv_usec / 1000;
 			if (elapsed >= device->timeout)
 				timeout = 0;
@@ -566,6 +566,23 @@ serial_send_break (serial *device)
 }
 
 
+int
+serial_set_break (serial *device, int level)
+{
+	if (device == NULL)
+		return -1; // EINVAL (Invalid argument)
+
+	int action = (level ? TIOCSBRK : TIOCCBRK);
+
+	if (ioctl (device->fd, action, NULL) != 0) {
+		TRACE ("ioctl");
+		return -1;
+	}
+
+	return 0;
+}
+
+
 static int
 serial_set_status (int fd, int value, int level)
 {
diff --git a/serial_win32.c b/serial_win32.c
index c54f2b2..29ba230 100644
--- a/serial_win32.c
+++ b/serial_win32.c
@@ -419,6 +419,27 @@ serial_send_break (serial* device)
 }
 
 
+int
+serial_set_break (serial *device, int level)
+{
+	if (device == NULL)
+		return -1; // ERROR_INVALID_PARAMETER (The parameter is incorrect)
+
+	if (level) {
+		if (!SetCommBreak (device->hFile)) {
+			TRACE ("SetCommBreak");
+			return -1;
+		}
+	} else {
+		if (!ClearCommBreak (device->hFile)) {
+			TRACE ("ClearCommBreak");
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
 int
 serial_set_dtr (serial* device, int level)
 {