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/** \file server/drivers/irtrans.c
* LCDd \c irtrans driver for IRTrans VFD displays.
*/
/*
* irtrans driver
*
* Copyright (C) 1998-2007 <info@irtrans.de>
*
* Copyright (C) 2007 Phant0m <phantom@netkeke.com>
* porting the LCDproc 0.4.3 code to LCDproc 0.5.1
*
* Inspired by:
* TextMode driver (LCDproc authors)
* irtrans driver (Irtrans)
*
* 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
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "lcd.h"
#include "irtrans.h"
#include "irtrans_remote.h"
#include "irtrans_network.h"
#include "irtrans_errcode.h"
#include "shared/report.h"
// Variables
/* This is necessary for Solaris <= Solaris 9 */
#ifndef INADDR_NONE
#define INADDR_NONE ((unsigned long) -1)
#endif
/** private data for the \c irtrans driver */
typedef struct irtrans_private_data {
int width;
int height;
int socket;
int timeout;
long last_time;
byte backlight;
int has_backlight;
char hostname[256];
char *framebuf;
char *shadow_buf;
} PrivateData;
// Vars for the server core
MODULE_EXPORT char *api_version = API_VERSION;
MODULE_EXPORT int stay_in_foreground = 0;
MODULE_EXPORT int supports_multiple = 0;
MODULE_EXPORT char *symbol_prefix = "irtrans_";
//////////////////////////////////////////////////////////////////////////
////////////////////// For Irtrans Output //////////////////////////////
//////////////////////////////////////////////////////////////////////////
int InitClientSocket(char host[], SOCKET *sock, unsigned long id);
int SendCommand(Driver *drvthis, LCDCOMMAND *com, STATUSBUFFER *stat);
MODULE_EXPORT int irtrans_init(Driver *drvthis)
{
PrivateData *p;
char buf[256];
/* Allocate and store private data */
p = (PrivateData *) calloc(1, sizeof(PrivateData));
if (p == NULL)
return -1;
if (drvthis->store_private_ptr(drvthis, p))
return -1;
/* initialize private data */
p->has_backlight =
drvthis->config_get_bool(drvthis->name, "Backlight", 0, 0);
report(RPT_INFO, "%s: Backlight %d", drvthis->name, p->backlight);
strncpy(p->hostname,
drvthis->config_get_string(drvthis->name, "Hostname", 0,
IRTRANS_DEFAULT_HOSTNAME),
sizeof(p->hostname));
p->hostname[sizeof(p->hostname) - 1] = '\0';
report(RPT_INFO, "%s: Hostname is %s", drvthis->name, p->hostname);
// Set display sizes
if ((drvthis->request_display_width() > 0)
&& (drvthis->request_display_height() > 0)) {
// Use size from primary driver
p->width = drvthis->request_display_width();
p->height = drvthis->request_display_height();
} else {
/* Use our own size from config file */
strncpy(buf,
drvthis->config_get_string(drvthis->name, "Size", 0,
IRTRANS_DEFAULT_SIZE),
sizeof(buf));
buf[sizeof(buf) - 1] = '\0';
if ((sscanf(buf, "%dx%d", &p->width, &p->height) != 2)
|| (p->width <= 0) || (p->width > LCD_MAX_WIDTH)
|| (p->height <= 0) || (p->height > LCD_MAX_HEIGHT)) {
report(RPT_WARNING,
"%s: cannot read Size: %s; using default %s",
drvthis->name, buf, IRTRANS_DEFAULT_SIZE);
sscanf(IRTRANS_DEFAULT_SIZE, "%dx%d", &p->width, &p->height);
}
}
// Allocate the framebuffer and shadow buffer
p->framebuf = malloc(p->width * p->height);
p->shadow_buf = malloc(p->width * p->height);
if (p->framebuf == NULL) {
report(RPT_ERR, "%s: unable to create framebuffer", drvthis->name);
return -1;
}
if (p->shadow_buf == NULL) {
report(RPT_ERR, "%s: unable to create shadow buffer",
drvthis->name);
return -1;
}
memset(p->framebuf, ' ', p->width * p->height);
memset(p->shadow_buf, ' ', p->width * p->height);
// InitClientSocket
if (InitClientSocket(p->hostname, &p->socket, 0)) {
report(RPT_ERR, "%s: unable to init client socket", drvthis->name);
return -1;
}
report(RPT_DEBUG, "%s: init() done", drvthis->name);
return 0;
}
/////////////////////////////////////////////////////////////////
// Closes the device
//
MODULE_EXPORT void irtrans_close(Driver *drvthis)
{
PrivateData *p = drvthis->private_data;
irtrans_clear(drvthis);
sleep(5);
p->backlight = 0;
irtrans_flush(drvthis);
if (p != NULL) {
if (p->framebuf != NULL)
free(p->framebuf);
free(p);
}
close(p->socket);
drvthis->store_private_ptr(drvthis, NULL);
}
/////////////////////////////////////////////////////////////////
// Returns the display width
//
MODULE_EXPORT int irtrans_width(Driver *drvthis)
{
PrivateData *p = drvthis->private_data;
return p->width;
}
/////////////////////////////////////////////////////////////////
// Returns the display height
//
MODULE_EXPORT int irtrans_height(Driver *drvthis)
{
PrivateData *p = drvthis->private_data;
return p->height;
}
/////////////////////////////////////////////////////////////////
// Clears the LCD screen
//
MODULE_EXPORT void irtrans_clear(Driver *drvthis)
{
PrivateData *p = drvthis->private_data;
memset(p->framebuf, ' ', p->width * p->height);
}
//////////////////////////////////////////////////////////////////
// Flushes all output to the lcd...
//
MODULE_EXPORT void irtrans_flush(Driver *drvthis)
{
PrivateData *p = drvthis->private_data;
LCDCOMMAND buf;
STATUSBUFFER stat;
if (!memcmp(p->shadow_buf, p->framebuf, p->width * p->height))
return;
if ((time(0) - p->last_time) < p->timeout)
return;
memcpy(buf.framebuffer, p->framebuf, p->width * p->height);
buf.wid = p->width;
buf.hgt = p->height;
buf.netcommand = COMMAND_LCD;
buf.adress = 'L';
buf.lcdcommand = LCD_TEXT | p->backlight;
buf.protocol_version = IRTRANS_PROTOCOL_VERSION;
SendCommand(drvthis, &buf, &stat); // Error Handling
memcpy(p->shadow_buf, p->framebuf, p->width * p->height);
p->last_time = time(0);
}
/////////////////////////////////////////////////////////////////
// Prints a string on the lcd display, at position (x,y). The
// upper-left is (1,1), and the lower right should be (20,4).
//
MODULE_EXPORT void
irtrans_string(Driver *drvthis, int x, int y, char string[])
{
PrivateData *p = drvthis->private_data;
int i;
x--;
y--; // Convert 1-based coords to 0-based...
if ((y < 0) || (y >= p->height))
return;
for (i = 0; (string[i] != '\0') && (x < p->width); i++, x++) {
if (x >= 0) // no write left of left border
p->framebuf[(y * p->width) + x] = string[i];
}
}
/////////////////////////////////////////////////////////////////
// Prints a character on the lcd display, at position (x,y). The
// upper-left is (1,1), and the lower right should be (20,4).
//
MODULE_EXPORT void irtrans_chr(Driver *drvthis, int x, int y, char c)
{
PrivateData *p = drvthis->private_data;
y--;
x--;
if ((x >= 0) && (y >= 0) && (x < p->width) && (y < p->height))
p->framebuf[(y * p->width) + x] = c;
}
/////////////////////////////////////////////////////////////////
// Sets the contrast
//
MODULE_EXPORT void irtrans_set_contrast(Driver *drvthis, int promille)
{
//PrivateData *p = drvthis->private_data;
debug(RPT_DEBUG, "Contrast: %d", promille);
}
/////////////////////////////////////////////////////////////////
// Sets the backlight brightness
//
MODULE_EXPORT void irtrans_backlight(Driver *drvthis, int on)
{
PrivateData *p = drvthis->private_data;
if (on && p->has_backlight)
p->backlight = LCD_BACKLIGHT;
else
p->backlight = 0;
debug(RPT_DEBUG, "Backlight %s", (on) ? "ON" : "OFF");
}
int SendCommand(Driver *drvthis, LCDCOMMAND *com, STATUSBUFFER *stat)
{
PrivateData *p = drvthis->private_data;
int res;
res = send(p->socket, (char *) com, sizeof(LCDCOMMAND), 0);
if (res != sizeof(LCDCOMMAND)) {
close(p->socket);
return (ERR_SEND);
}
memset(stat, 0, sizeof(STATUSBUFFER));
do {
res = recv(p->socket, (char *) stat, 8, 0);
if (stat->statuslen > 8) {
res =
recv(p->socket, ((char *) stat) + 8, stat->statuslen - 8,
0);
} else
return (0);
} while (stat->statustype == STATUS_RECEIVE);
return (0);
}
int InitClientSocket(char host[], SOCKET *sock, unsigned long id)
{
struct sockaddr_in serv_addr;
unsigned long adr;
struct hostent *he;
struct in_addr addr;
adr = inet_addr(host);
if (adr == INADDR_NONE) {
he = gethostbyname(host);
if (he == NULL)
return (ERR_FINDHOST);
memcpy(&addr, he->h_addr_list[0], sizeof(struct in_addr));
adr = addr.s_addr;
}
*sock = socket(PF_INET, SOCK_STREAM, 0);
if (*sock < 0)
return (ERR_OPENSOCKET);
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = adr;
serv_addr.sin_port = htons(TCP_PORT);
if (connect(*sock, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) <
0)
return (ERR_CONNECT);
send(*sock, (char *) &id, 4, 0);
return (0);
}
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