Added a function to set the serial port in low latency mode (mainly for FTDI USB adapters).

include/serial/rs232.h

@@ -10,6 +10,7 @@
 #include <fcntl.h>
 #include <errno.h>
 #include <string>
+#include <linux/serial.h>
 
 /**
  * \brief Available types of parity
@@ -464,6 +465,7 @@ class CRS232 : public CComm
      *         current state is inactive (positive voltage).
      */
     bool get_control_signal(control_signals signal);
+    void set_low_latency(void);
     /**
      * \brief destructor
      *

src/serial/rs232.cpp

@@ -359,6 +359,24 @@ bool CRS232::get_control_signal(control_signals signal)
     return false;  
 }
 
+void CRS232::set_low_latency(void)
+{
+  struct serial_struct serinfo;
+
+  if (ioctl(this->serial_fd, TIOCGSERIAL, &serinfo) < 0) 
+  {
+    /* handle exception */	  
+    throw CRS232Exception(_HERE_,"Impossible to get the port configuration.\n",this->comm_id);
+  }
+  serinfo.flags &= ~ASYNC_LOW_LATENCY;
+  serinfo.flags |= ASYNC_LOW_LATENCY;
+  if (ioctl(this->serial_fd, TIOCSSERIAL, &serinfo) < 0) 
+  {
+    /* handle exception */	  
+    throw CRS232Exception(_HERE_,"Impossible to set the port configuration.\n",this->comm_id);
+  }
+}
+
 CRS232::~CRS232()
 {
   this->close();