/*
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 <unistd.h>
#include <errno.h>
#include "ft12.h"
FT12LowLevelDriver::FT12LowLevelDriver (const char *dev, Trace * tr)
{
struct termios t1;
t = tr;
TRACEPRINTF (t, 1, this, "Open");
fd = open (dev, O_RDWR | O_NOCTTY);
if (fd == -1)
throw Exception (DEV_OPEN_FAIL);
tcgetattr (fd, &old);
tcgetattr (fd, &t1);
t1.c_cflag = CS8 | PARENB | CLOCAL | CREAD;
t1.c_iflag = IGNBRK | INPCK | ISIG;
t1.c_oflag = 0;
t1.c_lflag = 0;
t1.c_cc[VTIME] = 1;
t1.c_cc[VMIN] = 0;
cfsetospeed (&t1, B19200);
cfsetispeed (&t1, 0);
tcsetattr (fd, TCSAFLUSH, &t1);
sendflag = 0;
recvflag = 0;
repeatcount = 0;
mode = 0;
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");
}
FT12LowLevelDriver::~FT12LowLevelDriver ()
{
Stop ();
pth_event_free (getwait, PTH_FREE_THIS);
while (!outqueue.isempty ())
delete outqueue.get ();
TRACEPRINTF (t, 1, this, "Close");
if (fd != -1)
{
tcsetattr (fd, TCSAFLUSH, &old);
close (fd);
}
}
void
FT12LowLevelDriver::Send_Packet (CArray l)
{
CArray pdu;
uchar c;
unsigned i;
t->TracePacket (1, this, "Send", l);
assert (l () <= 32);
pdu.resize (l () + 7);
pdu[0] = 0x68;
pdu[1] = l () + 1;
pdu[2] = l () + 1;
pdu[3] = 0x68;
if (sendflag)
pdu[4] = 0x53;
else
pdu[4] = 0x73;
sendflag = !sendflag;
pdu.setpart (l.array (), 5, l ());
c = pdu[4];
for (i = 0; i < l (); i++)
c += l[i];
pdu[pdu () - 2] = c;
pdu[pdu () - 1] = 0x16;
inqueue.put (pdu);
pth_sem_set_value (&send_empty, 0);
pth_sem_inc (&in_signal, TRUE);
}
void
FT12LowLevelDriver::SendReset ()
{
CArray pdu;
TRACEPRINTF (t, 1, this, "SendReset");
pdu.resize (4);
pdu[0] = 0x10;
pdu[1] = 0x40;
pdu[2] = 0x40;
pdu[3] = 0x16;
sendflag = 0;
recvflag = 0;
inqueue.put (pdu);
pth_sem_set_value (&send_empty, 0);
pth_sem_inc (&in_signal, TRUE);
}
bool
FT12LowLevelDriver::Send_Queue_Empty ()
{
return inqueue.isempty ();
}
pth_sem_t *
FT12LowLevelDriver::Send_Queue_Empty_Cond ()
{
return &send_empty;
}
CArray *
FT12LowLevelDriver::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;
}
bool
FT12LowLevelDriver::Connection_Lost ()
{
return repeatcount > 10;
}
void
FT12LowLevelDriver::Run (pth_sem_t * stop1)
{
CArray last;
int i;
uchar buf[255];
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, 100000));
while (pth_event_status (stop) != PTH_STATUS_OCCURRED)
{
pth_event_isolate (input);
pth_event_isolate (timeout);
if (mode == 0)
pth_event_concat (stop, input, NULL);
if (mode == 1)
pth_event_concat (stop, timeout, NULL);
i = pth_read_ev (fd, buf, sizeof (buf), stop);
if (i > 0)
{
t->TracePacket (0, this, "Recv", i, buf);
akt.setpart (buf, akt (), i);
}
while (akt.len () > 0)
{
if (akt[0] == 0xE5 && mode == 1)
{
pth_sem_dec (&in_signal);
inqueue.get ();
if (inqueue.isempty ())
pth_sem_set_value (&send_empty, 1);
akt.deletepart (0, 1);
mode = 0;
repeatcount = 0;
}
else if (akt[0] == 0x10)
{
if (akt () < 4)
break;
if (akt[1] == akt[2] && akt[3] == 0x16)
{
uchar c1 = 0xE5;
t->TracePacket (0, this, "Send Ack", 1, &c1);
write (fd, &c1, 1);
if ((akt[1] == 0xF3 && !recvflag) ||
(akt[1] == 0xD3 && recvflag))
{
//right sequence number
recvflag = !recvflag;
}
}
akt.deletepart (0, 4);
}
else if (akt[0] == 0x68)
{
int len;
uchar c1;
if (akt () < 7)
break;
if (akt[1] != akt[2] || akt[3] != 0x68)
{
//receive error, try to resume
akt.deletepart (0, 1);
continue;
}
if (akt () < akt[1] + 6)
break;
c1 = 0;
for (i = 4; i < akt[1] + 4; i++)
c1 += akt[i];
if (akt[akt[1] + 4] != c1 || akt[akt[1] + 5] != 0x16)
{
len = akt[1] + 6;
//Forget wrong short frame
akt.deletepart (0, len);
continue;
}
c1 = 0xE5;
t->TracePacket (0, this, "Send Ack", 1, &c1);
i = write (fd, &c1, 1);
if ((akt[4] == 0xF3 && recvflag) ||
(akt[4] == 0xD3 && !recvflag))
{
if (CArray (akt.array () + 5, akt[1] - 1) != last)
{
TRACEPRINTF (t, 0, this, "Sequence jump");
recvflag = !recvflag;
}
else
TRACEPRINTF (t, 0, this, "Wrong Sequence");
}
if ((akt[4] == 0xF3 && !recvflag) ||
(akt[4] == 0xD3 && recvflag))
{
recvflag = !recvflag;
CArray *c = new CArray;
len = akt[1] + 6;
c->setpart (akt.array () + 5, 0, len - 7);
last = *c;
outqueue.put (c);
pth_sem_inc (&out_signal, TRUE);
}
akt.deletepart (0, len);
}
else
//Forget unknown byte
akt.deletepart (0, 1);
}
if (mode == 1 && pth_event_status (timeout) == PTH_STATUS_OCCURRED)
mode = 0;
if (mode == 0 && !inqueue.isempty ())
{
const CArray & c = inqueue.top ();
t->TracePacket (0, this, "Send", c);
repeatcount++;
i = pth_write_ev (fd, c.array (), c (), stop);
if (i == c ())
{
mode = 1;
timeout =
pth_event (PTH_EVENT_TIME | PTH_MODE_REUSE, timeout,
pth_timeout (0, 100000));
}
}
}
pth_event_free (stop, PTH_FREE_THIS);
pth_event_free (timeout, PTH_FREE_THIS);
pth_event_free (input, PTH_FREE_THIS);
}
LowLevelDriverInterface::EMIVer FT12LowLevelDriver::getEMIVer ()
{
return vEMI2;
}
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