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/** \file server/drivers/serialVFD_io.c
* Hardware dependent routines for the \c serialVFD driver.
* Here are the routines for initializing, writing to, and closing the
* serial resp. parallel port for the \c serialVFD driver.
*/
/*-
* Copyright (C) 2006 Stefan Herdler
*
* This driver is based on wirz-sli.c, hd44780.c, drv_base.c and NoritakeVFD
* driver. It may contain parts of other drivers of this package too.
*
* 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
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
*/
/*
* 2006-05-16 Version 0.3: everything should work (not all hardware tested!)
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <unistd.h>
#include <termios.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include "lcd.h"
#include "shared/report.h"
#include "lpt-port.h"
#include "port.h"
#include "serialVFD_io.h"
#include "serialVFD.h"
/*
* XXX: ENIRQ used to be set, although no IRQ handler is defined. As the
* schematic in the user guide shows BUSY connected to ACK, leave it as is.
*/
#define WR_on ((ENIRQ | STRB) ^ OUTMASK) /* STRB (1) is active low */
#define WR_off (ENIRQ ^ OUTMASK)
#define MAXBUSY 300
/**
* Write bytes to the serial port.
* \param drvthis Pointer to driver
* \param dat Pointer to array storing the data
* \param length Number of bytes to write
*/
void
serialVFD_write_serial (Driver *drvthis, unsigned char *dat, size_t length)
{
PrivateData *p = drvthis->private_data;
if (length <= 0)
return;
write(p->fd,dat,length);
}
/**
* Write bytes to the parallel port.
*
* Timing can be modified by inserting additional delays according to the
* \c PortWait setting in \c LCDd.conf: \n
* Portwait = 0; no delays, only BUSY bit checked\n
* Portwait = 1; additional WR off to check BUSY delay\n
* Portwait = 2; as 1 + additional WR pulse width\n
* Portwait = 3; as 2 + additional WR setup delay\n
* Portwait >= 4; as 3 + additional wait delay to next command
*
* \param drvthis Pointer to driver
* \param dat Pointer to array storing the data
* \param length Number of bytes to write
*/
void
serialVFD_write_parallel (Driver *drvthis, unsigned char *dat, size_t length)
{
#ifdef HAVE_PCSTYLE_LPT_CONTROL
PrivateData *p = drvthis->private_data;
int i_para, j_para;
if (length <= 0)
return;
for (i_para = 0; i_para < length; i_para++) {
port_out(p->port, dat[i_para]);
/* data to WR enable delay */
if (p->para_wait > 2)
port_in(p->port+1);
port_out(p->port+2, WR_on);
/* additional WR pulse width */
if (p->para_wait > 1)
port_in(p->port+1);
port_out(p->port+2, WR_off);
/* additional BUSY delay time */
if (p->para_wait > 0)
port_in(p->port+1);
/*
* Check MAXBUSY times if the BUSY bit is set. Note: BUSY bit
* on parallel port is hardware inverted, but VFD is ready
* if its BUSY bit is cleared (thus high on PC).
*/
for (j_para = 0; j_para < MAXBUSY; j_para++) {
if ((port_in(p->port+1)) & BUSY)
break;
}
/* wait time of next WR */
for (j_para = 3; j_para < p->para_wait; j_para++)
port_in(p->port+1);
}
#endif
}
/**
* Open a serial port according to the settings in \c serialVFD_private_data.
* \param drvthis Pointer to driver
* \return -1 on error, 0 on success
*/
int
serialVFD_init_serial (Driver *drvthis)
{
PrivateData *p = drvthis->private_data;
struct termios portset;
/* Set up io port correctly, and open it...*/
debug( RPT_DEBUG, "%s: Opening device: %s", __FUNCTION__, p->device);
p->fd = open(p->device, O_RDWR | O_NOCTTY | O_NDELAY);
if (p->fd == -1) {
report(RPT_ERR, "%s: open() of %s failed (%s)", __FUNCTION__, p->device, strerror(errno));
return -1;
}
tcgetattr(p->fd, &portset);
/* We use RAW mode */
#ifdef HAVE_CFMAKERAW
/* The easy way */
cfmakeraw( &portset );
#else
/* The hard way */
portset.c_iflag &= ~( IGNBRK | BRKINT | PARMRK | ISTRIP
| INLCR | IGNCR | ICRNL | IXON );
portset.c_oflag &= ~OPOST;
portset.c_lflag &= ~( ECHO | ECHONL | ICANON | ISIG | IEXTEN );
portset.c_cflag &= ~( CSIZE | PARENB | CRTSCTS );
portset.c_cflag |= CS8 | CREAD | CLOCAL ;
#endif
/* Set port speed */
cfsetospeed(&portset, p->speed);
cfsetispeed(&portset, B0);
/* Do it... */
tcsetattr(p->fd, TCSANOW, &portset);
return 0;
}
/**
* Open a parallel port according to the settings in \c serialVFD_private_data.
* \param drvthis Pointer to driver
* \return -1 on error, 0 on success
*/
int
serialVFD_init_parallel (Driver *drvthis)
{
PrivateData *p = drvthis->private_data;
#ifdef HAVE_PCSTYLE_LPT_CONTROL
debug(RPT_DEBUG, "%s: Opening parallelport at: 0x%X", __FUNCTION__, p->port);
if (port_access_multiple(p->port,3)) {
report(RPT_ERR, "%s: port_access_multiple() of 0x%X failed (%s)", __FUNCTION__, p->port, strerror(errno));
return -1;
}
return 0;
#else
report(RPT_ERR, "%s: LCDproc was compiled without PCstyle LPT support", __FUNCTION__);
return -1;
#endif
}
/**
* Close serial port.
* \param drvthis Pointer to driver
*/
void
serialVFD_close_serial (Driver *drvthis)
{
PrivateData *p = drvthis->private_data;
if (p->fd >= 0)
close(p->fd);
}
/**
* Close parallel port.
* \param drvthis Pointer to driver
*/
void
serialVFD_close_parallel (Driver *drvthis)
{
#ifdef HAVE_PCSTYLE_LPT_CONTROL
PrivateData *p = drvthis->private_data;
debug(RPT_DEBUG, "%s: Closing parallelport at: 0x%X", __FUNCTION__, p->port);
if (port_deny_multiple(p->port,3)) {
report(RPT_ERR, "%s: port_deny_multiple() of 0x%X failed (%s)", __FUNCTION__, p->port, strerror(errno));
}
#endif
}
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