[patch 1924805] add a setBreak function (proposed files attached)

4 files changed, 31 insertions, 4 deletions

diff --git a/pyserial/CHANGES.txt b/pyserial/CHANGES.txt
index 4070096..e85c42b 100644
--- a/pyserial/CHANGES.txt
+++ b/pyserial/CHANGES.txt
@@ -240,7 +240,7 @@ Version 2.3     19 Jun 2008
 New Features:
 
 - iterator interface. ``for line in Serial(...): ...`` is now possible
-  Sugested by Bernhard Bender
+  Suggested by Bernhard Bender
 
 - ``sendBreak()`` accepts a ``duration`` argument. Default duration increased.
 
@@ -277,7 +277,10 @@ Version 2.4
 ---------------------------
 New Features:
 - [Patch 1616790] pyserial: Add inter-character timeout feature
+- [patch 1924805] add a setBreak function (proposed files attached)
+
 Bugfixes:
 Bugfixes (posix):
 - [Bug 1783159] Arbitrary baud rates (Linux/Posix)
+
 Bugfixes (win32):
diff --git a/pyserial/serial/serialjava.py b/pyserial/serial/serialjava.py
index 9b56c95..f2e0c1b 100644
--- a/pyserial/serial/serialjava.py
+++ b/pyserial/serial/serialjava.py
@@ -153,10 +153,15 @@ class Serial(SerialBase):
         self._outstream.flush()
 
     def sendBreak(self, duration=0.25):
-        """Send break condition."""
+        """Send break condition. Timed, returns to idle state after given duration."""
         if not self.sPort: raise portNotOpenError
         self.sPort.sendBreak(duration*1000.0)
 
+    def setBreak(self, level=1):
+        """Set break: Controls TXD. When active, to transmitting is possible."""
+        if self.fd is None: raise portNotOpenError
+        raise SerialException("The setBreak function is not implemented in java.")
+
     def setRTS(self, level=1):
         """Set terminal status line: Request To Send"""
         if not self.sPort: raise portNotOpenError
diff --git a/pyserial/serial/serialposix.py b/pyserial/serial/serialposix.py
index 6f57d73..f19920b 100644
--- a/pyserial/serial/serialposix.py
+++ b/pyserial/serial/serialposix.py
@@ -121,6 +121,9 @@ TIOCM_zero_str = struct.pack('I', 0)
 TIOCM_RTS_str = struct.pack('I', TIOCM_RTS)
 TIOCM_DTR_str = struct.pack('I', TIOCM_DTR)
 
+TIOCSBRK  = hasattr(TERMIOS, 'TIOCSBRK') and TERMIOS.TIOCSBRK or 0x5427
+TIOCCBRK  = hasattr(TERMIOS, 'TIOCCBRK') and TERMIOS.TIOCCBRK or 0x5428
+
 ASYNC_SPD_MASK = 0x1030
 ASYNC_SPD_CUST = 0x0030
 
@@ -398,11 +401,19 @@ class Serial(SerialBase):
         termios.tcflush(self.fd, TERMIOS.TCOFLUSH)
 
     def sendBreak(self, duration=0.25):
-        """Send break condition."""
+        """Send break condition. Timed, returns to idle state after given duration."""
         if self.fd is None:
             raise portNotOpenError
         termios.tcsendbreak(self.fd, int(duration/0.25))
 
+    def setBreak(self, level=1):
+        """Set break: Controls TXD. When active, to transmitting is possible."""
+        if self.fd is None: raise portNotOpenError
+        if level:
+            fcntl.ioctl(self.fd, TIOCSBRK)
+        else:
+            fcntl.ioctl(self.fd, TIOCCBRK)
+
     def setRTS(self, level=1):
         """Set terminal status line: Request To Send"""
         if self.fd is None: raise portNotOpenError
diff --git a/pyserial/serial/serialwin32.py b/pyserial/serial/serialwin32.py
index 3be67af..3601615 100644
--- a/pyserial/serial/serialwin32.py
+++ b/pyserial/serial/serialwin32.py
@@ -248,13 +248,21 @@ class Serial(SerialBase):
         win32file.PurgeComm(self.hComPort, win32file.PURGE_TXCLEAR | win32file.PURGE_TXABORT)
 
     def sendBreak(self, duration=0.25):
-        """Send break condition."""
+        """Send break condition. Timed, returns to idle state after given duration."""
         if not self.hComPort: raise portNotOpenError
         import time
         win32file.SetCommBreak(self.hComPort)
         time.sleep(duration)
         win32file.ClearCommBreak(self.hComPort)
 
+    def setBreak(self, level=1):
+        """Set break: Controls TXD. When active, to transmitting is possible."""
+        if not self.hComPort: raise portNotOpenError
+        if level:
+            win32file.SetCommBreak(self.hComPort)
+        else:
+            win32file.ClearCommBreak(self.hComPort)
+
     def setRTS(self, level=1):
         """Set terminal status line: Request To Send"""
         if not self.hComPort: raise portNotOpenError