1 files changed, 13 insertions, 3 deletions
diff --git a/glcddrivers/port.c b/glcddrivers/port.c
index 2c123e1..bf5df86 100644
--- a/glcddrivers/port.c
+++ b/glcddrivers/port.c
@@ -340,9 +340,6 @@ int cSerialPort::Open(const char * device)
     options.c_cflag &= ~CSIZE;
     options.c_cflag |= CS8;
 
-    // No "hangup" (prevents Arduino firmware reboots)
-    options.c_cflag &= ~HUPCL;
-
     // No hardware flow control
     options.c_cflag &= ~CRTSCTS;
 
@@ -392,6 +389,19 @@ void cSerialPort::SetBaudRate(int speed)
     }
 }
 
+// Configures the serial port to not send a "hangup" signal.
+// Returns true if the flag was set and had to be removed and false otherwise.
+bool cSerialPort::DisableHangup()
+{
+    struct termios options;
+    tcgetattr(fd, &options);
+    if (!(options.c_cflag & HUPCL))
+        return false;
+    options.c_cflag &= ~HUPCL;
+    tcsetattr(fd, TCSANOW, &options);
+    return true;
+}
+
 int cSerialPort::ReadData(unsigned char * data)
 {
     if (fd == -1)