/*
EIBD eib bus access and management daemon
Copyright (C) 2005-2007 Martin Koegler <mkoegler@auto.tuwien.ac.at>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <fcntl.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <time.h>
#include "bcu1serial.h"
void
BCU1SerialLowLevelDriver::SendReset ()
{
}
bool
BCU1SerialLowLevelDriver::Connection_Lost ()
{
return 0;
}
void
BCU1SerialLowLevelDriver::Send_Packet (CArray l)
{
CArray pdu;
t->TracePacket (1, this, "Send", l);
inqueue.put (l);
pth_sem_set_value (&send_empty, 0);
pth_sem_inc (&in_signal, TRUE);
}
bool
BCU1SerialLowLevelDriver::Send_Queue_Empty ()
{
return inqueue.isempty ();
}
pth_sem_t *
BCU1SerialLowLevelDriver::Send_Queue_Empty_Cond ()
{
return &send_empty;
}
CArray *
BCU1SerialLowLevelDriver::Get_Packet (pth_event_t stop)
{
if (stop != NULL)
pth_event_concat (getwait, stop, NULL);
pth_wait (getwait);
if (stop)
pth_event_isolate (getwait);
if (pth_event_status (getwait) == PTH_STATUS_OCCURRED)
{
pth_sem_dec (&out_signal);
CArray *c = outqueue.get ();
t->TracePacket (1, this, "Recv", *c);
return c;
}
else
return 0;
}
BCU1SerialLowLevelDriver::BCU1SerialLowLevelDriver (const char *dev,
Trace * tr)
{
struct termios ti;
t = tr;
TRACEPRINTF (t, 1, this, "Open");
fd = open (dev, O_RDWR | O_NOCTTY | O_NDELAY | O_SYNC);
if (fd == -1)
throw Exception (DEV_OPEN_FAIL);
set_low_latency (fd, &sold);
close (fd);
fd = open (dev, O_RDWR | O_NOCTTY | O_NDELAY | O_SYNC);
if (fd == -1)
throw Exception (DEV_OPEN_FAIL);
tcgetattr (fd, &told);
ti.c_cflag = CS8 | CLOCAL | CREAD;
ti.c_iflag = IGNBRK | INPCK | ISIG;
ti.c_oflag = 0;
ti.c_lflag = 0;
ti.c_cc[VTIME] = 1;
ti.c_cc[VMIN] = 0;
cfsetospeed (&ti, B9600);
cfsetispeed (&ti, 0);
tcsetattr (fd, TCSAFLUSH, &ti);
setstat (getstat () & ~(TIOCM_RTS | TIOCM_CTS));
while ((getstat () & TIOCM_CTS));
pth_sem_init (&in_signal);
pth_sem_init (&out_signal);
pth_sem_init (&send_empty);
pth_sem_set_value (&send_empty, 1);
getwait = pth_event (PTH_EVENT_SEM, &out_signal);
Start ();
TRACEPRINTF (t, 1, this, "Opened");
}
BCU1SerialLowLevelDriver::~BCU1SerialLowLevelDriver ()
{
TRACEPRINTF (t, 1, this, "Close");
Stop ();
pth_event_free (getwait, PTH_FREE_THIS);
if (fd != -1)
{
restore_low_latency (fd, &sold);
tcsetattr (fd, TCSAFLUSH, &told);
close (fd);
}
}
int
BCU1SerialLowLevelDriver::getstat ()
{
int s;
ioctl (fd, TIOCMGET, &s);
return s;
}
void
BCU1SerialLowLevelDriver::setstat (int s)
{
ioctl (fd, TIOCMSET, &s);
}
/** counts to number of set bits in x */
int
bitcount (unsigned char x)
{
int i, j;
for (i = j = 0; i < 8; i++)
if (x & (1 << i))
j++;
return j;
}
void
BCU1SerialLowLevelDriver::startsync ()
{
int to = 0;
int s = getstat ();
setstat (s | TIOCM_RTS);
while (!(getstat () & TIOCM_CTS))
{
to++;
if (to > 0x10000)
throw (int) 1;
}
TRACEPRINTF (t, 0, this, "Startsync");
}
void
BCU1SerialLowLevelDriver::endsync ()
{
int to = 0;
int s = getstat ();
setstat (s & ~TIOCM_RTS);
while ((getstat () & TIOCM_CTS))
{
to++;
if (to > 0x10000)
throw (int) 2;
}
TRACEPRINTF (t, 0, this, "Endsync");
}
uchar
BCU1SerialLowLevelDriver::exchange (uchar c, pth_event_t stop)
{
uchar s;
int i;
int to = 0;
write (fd, &c, 1);
while ((i = read (fd, &s, 1)) == -1)
{
to++;
if (to > 0x10000)
throw (int) 3;
}
TRACEPRINTF (t, 0, this, "exchange %02X <->%02X", c, s);
return s;
}
void
BCU1SerialLowLevelDriver::Run (pth_sem_t * stop1)
{
pth_event_t stop = pth_event (PTH_EVENT_SEM, stop1);
pth_event_t input = pth_event (PTH_EVENT_SEM, &in_signal);
pth_event_t timeout = pth_event (PTH_EVENT_TIME, pth_timeout (0, 10));
while (pth_event_status (stop) != PTH_STATUS_OCCURRED)
{
timeout =
pth_event (PTH_EVENT_TIME | PTH_MODE_REUSE, timeout,
pth_timeout (0, 150));
pth_event_concat (stop, input, timeout, NULL);
pth_wait (stop);
pth_event_isolate (stop);
pth_event_isolate (input);
timeout =
pth_event (PTH_EVENT_TIME | PTH_MODE_REUSE, timeout,
pth_timeout (0, 200));
pth_event_concat (stop, timeout, NULL);
struct timeval v1, v2;
gettimeofday (&v1, 0);
try
{
CArray e;
CArray r;
uchar s;
if (!inqueue.isempty ())
{
const CArray & c = inqueue.top ();
e.resize (c () + 1);
s = c () & 0x1f;
s |= 0x20;
s |= 0x80 * bitcount (s);
e[0] = s;
e.setpart (c, 1);
}
else
{
e.resize (1);
e[0] = 0xff;
}
startsync ();
s = exchange (e[0], stop);
endsync ();
if (s == 0xff && e[0] != 0xff)
{
for (unsigned i = 1; i < e (); i++)
{
startsync ();
s = exchange (e[i], stop);
endsync ();
}
if (s != 0x00)
throw 10;
inqueue.get ();
TRACEPRINTF (t, 0, this, "Sent");
pth_sem_dec (&in_signal);
if (inqueue.isempty ())
pth_sem_set_value (&send_empty, 1);
}
else if (s != 0xff)
{
r.resize ((s & 0x1f));
for (unsigned i = 0; i < (s & 0x1f); i++)
{
startsync ();
r[i] = exchange (0, stop);
endsync ();
}
TRACEPRINTF (t, 0, this, "Recv");
outqueue.put (new CArray (r));
pth_sem_inc (&out_signal, 1);
}
gettimeofday (&v2, 0);
TRACEPRINTF (t, 1, this, "Recvtime: %d",
v2.tv_sec * 1000000L + v2.tv_usec -
(v1.tv_sec * 1000000L + v1.tv_usec));
}
catch (int x)
{
gettimeofday (&v2, 0);
TRACEPRINTF (t, 1, this, "ERecvtime: %d",
v2.tv_sec * 1000000L + v2.tv_usec -
(v1.tv_sec * 1000000L + v1.tv_usec));
setstat (getstat () & ~(TIOCM_RTS | TIOCM_CTS));
pth_usleep (2000);
while ((getstat () & TIOCM_CTS));
TRACEPRINTF (t, 0, this, "Restart %d", x);
}
pth_event_isolate (timeout);
}
pth_event_free (timeout, PTH_FREE_THIS);
pth_event_free (stop, PTH_FREE_THIS);
pth_event_free (input, PTH_FREE_THIS);
}
LowLevelDriverInterface::EMIVer BCU1SerialLowLevelDriver::getEMIVer ()
{
return vEMI1;
}
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