eibd/backend/bcu1serial.h

   1 /*
   2     EIBD eib bus access and management daemon
   3     Copyright (C) 2005-2011 Martin Koegler <mkoegler@auto.tuwien.ac.at>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #ifndef BCU1SERIAL_H
  21 #define BCU1SERIAL_H
  22
  23 #include <termios.h>
  24 #include "lowlatency.h"
  25 #include "lowlevel.h"
  26
  27 /** PEI16 / BCU1 user mode driver */
  28 class BCU1SerialLowLevelDriver:public LowLevelDriverInterface, private Thread
  29 {
  30   /** file descriptor */
  31   int fd;
  32   /** old termios settings */
  33   struct termios told;
  34   /** old serial port settings */
  35   low_latency_save sold;
  36   /** debug output */
  37   Trace *t;
  38   /** semaphore for inqueue */
  39   pth_sem_t in_signal;
  40   /** semaphore for outqueue */
  41   pth_sem_t out_signal;
  42   /** input queue */
  43     Queue < CArray > inqueue;
  44     /** output queue */
  45     Queue < CArray * >outqueue;
  46     /** semaphore to wait for outqueue */
  47   pth_event_t getwait;
  48   /** semaphore to signal empty sendqueue */
  49   pth_sem_t send_empty;
  50
  51   /** gets the serial port line status */
  52   int getstat ();
  53   /** sets the serial port line status */
  54   void setstat (int v);
  55   /** runs a start sync of a byte exchange */
  56   bool startsync ();
  57   /** finishes the byte exchange */
  58   bool endsync ();
  59   /** exchange two bytes*/
  60   bool exchange (uchar c, uchar & result, pth_event_t stop);
  61   void Run (pth_sem_t * stop);
  62 public:
  63     BCU1SerialLowLevelDriver (const char *device, Trace * tr);
  64    ~BCU1SerialLowLevelDriver ();
  65   bool init ();
  66
  67   void Send_Packet (CArray l);
  68   bool Send_Queue_Empty ();
  69   pth_sem_t *Send_Queue_Empty_Cond ();
  70   CArray *Get_Packet (pth_event_t stop);
  71   void SendReset ();
  72   bool Connection_Lost ();
  73   EMIVer getEMIVer ();
  74 };
  75
  76
  77 #endif