#Driver=imon

[imon]

# Ahanix/Soundgraph IMON driver

Size=16x2

Device=/dev/lcd0

#undef IMON_DRV

		imon)

			DRIVERS="$DRIVERS imon.o"

			AC_DEFINE(IMON_DRV)

			actdrivers=["$actdrivers imon"]

			;;

	imon.c imon.h \

/**

 * Driver for Ahanix/Soundgraph IMON IR/VFD Module

 *

 * (C) 2004, Venky Raju <dev@venky.ws>

 *

 * This source code is being released under the GPL.

 * Please see the file COPYING in this package for details.

 *

 * Inspired by:

 * 	TextMode driver (LCDproc authors?)

 *	Sasem driver	(Oliver Stabel)

 */

#include <stdlib.h>

#include <stdio.h>

#include <unistd.h>

#include <termios.h>

#include <fcntl.h>

#include <string.h>

#include <sys/errno.h>

#include <syslog.h>

#include "lcd.h"

#include "imon.h"

#include "drv_base.h"

#include "shared/report.h"

#include "configfile.h"

#define PAD 			'#'

#define DEFAULT_DEVICE		"/dev/usb/lcd"

#define DEFAULT_SIZE		"16x2"

/**

 * Function prototypes

 */

static void imon_close ();

static void imon_clear ();

static void imon_flush ();

static void imon_string (int x, int y, char string[]);

static void imon_chr (int x, int y, char c);

/* static int imon_contrast (int contrast); */

/* static void imon_backlight (int on); */

/* static void imon_init_vbar (); */

/* static void imon_init_hbar (); */

/* static void imon_init_num (); */

static void imon_vbar (int x, int len);

static void imon_hbar (int x, int y, int len);

/* static void imon_num (int x, int num); */

/* static void imon_set_char (int n, char *dat); */

/* static void imon_flush_box (int lft, int top, int rgt, int bot); */

static void imon_draw_frame (char *dat);

lcd_logical_driver *imon;

static int imon_fd;

/* The two value below are fake, we don't support custom char. */

#define VFD_DEFAULT_CELL_WIDTH 5

#define VFD_DEFAULT_CELL_HEIGHT 8

int imon_init (lcd_logical_driver * driver, char *args)

{

	char buf[256];

	int width=0, height=0;

	imon = driver;

	/* TODO?: replace DriverName with driver->name when that field exists.*/

	#define DriverName "imon"

	/* Get settings from config file*/

	/* Get device */

	strncpy (buf, config_get_string (DriverName, "device", 0, DEFAULT_DEVICE), sizeof (buf));

	buf [sizeof(buf)-1] = 0;

	report (RPT_INFO, "imon: using device %s", buf);

	/* Open device for writing */

	if ((imon_fd = open (buf, O_WRONLY)) < 0) {

		report (RPT_ERR, "imon: error opening %s (%s)", buf, strerror (errno));

		return -1;

	}

	/* Get size settings*/

	strncpy (buf, config_get_string (DriverName , "Size" , 0 , DEFAULT_SIZE), sizeof(buf));

	buf[sizeof(buf)-1] = 0;

	if (sscanf(buf , "%dx%d", &width, &height ) != 2 || (width <= 0) || (height <= 0)) {

		report (RPT_WARNING, "imon: cannot read size: %s. Using default value %s.\n", 

				buf, DEFAULT_SIZE);

		sscanf (DEFAULT_SIZE , "%dx%d", &width, &height );

	}

	imon->wid = width;

	imon->hgt = height;

	/* Make sure the frame buffer is there... */

	if (!imon->framebuf)

		imon->framebuf = (unsigned char *) malloc (imon->wid * imon->hgt);

	memset (imon->framebuf, ' ', imon->wid * imon->hgt);

	imon->cellwid = VFD_DEFAULT_CELL_WIDTH;

	imon->cellhgt = VFD_DEFAULT_CELL_HEIGHT;

	/* Set the functions the driver supports */

	imon->clear = imon_clear;

	imon->string = imon_string;

	imon->chr = imon_chr;

	imon->vbar = imon_vbar;

	imon->hbar = imon_hbar;

	/* imon->init_vbar = NULL; */

	/* imon->init_hbar = NULL; */

	/* imon->num = imon_num; */

	/* imon->init_num = NULL; */

	imon->init = imon_init;

	imon->close = imon_close;

	imon->flush = imon_flush;

	/* imon->flush_box = NULL; */ 

	/* imon->contrast = NULL; */ 

	/* imon->backlight = NULL; */

	/* imon->set_char = NULL; */

	/* imon->icon = NULL; */

	imon->draw_frame = imon_draw_frame;

	/* imon->getkey = NULL; */

	return !0;		 

}

static void imon_close ()

{

	if (imon->framebuf != NULL)

		free (imon->framebuf);

	imon->framebuf = NULL;

	close (imon_fd);

}

/** 

 * Clears the VFD screen 

 */

static void imon_clear ()

{

	memset (imon->framebuf, ' ', imon->wid * imon->hgt);

}

/**

 * Flushes all output to the VFD...  

 */

static void imon_flush ()

{

	imon_draw_frame (imon->framebuf);

}

/**

 * Prints a string on the VFD display, at position (x,y).

 * The upper-left is (1,1) and the lower right is (16, 2).  

 */

static void imon_string (int x, int y, char string[])

{

	int i;

	for (i = 0; string[i]; i++)

		imon_chr (x+i, y, string [i]);

}

/**

 * Prints a character on the VFD display, at position (x,y).

 * The upper-left is (1,1) and the lower right is (16,2).

 */

static void imon_chr (int x, int y, char ch)

{

	y--; x--;

	switch (ch) {

		case 0:

		case -1:	

			ch = PAD;

			break;

		default:

			;

	}

	imon->framebuf[(y * imon->wid) + x] = ch;

}

/**

 * Draws a vertical bar; erases entire column onscreen.

 */

static void imon_vbar (int x, int len)

{

	int y;

	for (y = imon->hgt; y > 0 && len > 0; y--) {

		imon_chr (x, y, '|');

		len -= imon->cellhgt;

	}

}

/**

 * Draws a horizontal bar to the right.

 */

static void imon_hbar (int x, int y, int len)

{

	for (; x <= imon->wid && len > 0; x++) {

		imon_chr (x, y, '-');

		len -= imon->cellwid;

	}

}

static void imon_flush_box (int lft, int top, int rgt, int bot)

{

	imon_flush ();

}

static void imon_draw_frame (char *dat)

{

	write (imon_fd, dat, 32);

}

/**

 * Driver for Ahanix/Soundgraph IMON IR/VFD Module

 *

 * (C) 2004, Venky Raju <dev@venky.ws>

 *

 * This source code is being released under the GPL.

 * Please see the file COPYING in this package for details.

 *

 * Inspired by:

 * 	TextMode driver (LCDproc authors?)

 *	Sasem driver	(Oliver Stabel)

 */

#ifndef IMON_H

#define IMON_H

extern lcd_logical_driver *imon;

int imon_init (struct lcd_logical_driver *driver, char *args);

#endif

#ifdef IMON_DRV

#include "imon.h"

#endif

#ifdef IMON_DRV

	{"imon", imon_init,},

#endif