Add:Plugin:Added the j1850 plugin, allows Navit to read CAN-BUS datas in some cars using this protocol

git-svn-id: http://svn.code.sf.net/p/navit/code/trunk/navit@5976 ffa7fe5e-494d-0410-b361-a75ebd5db220

2 files changed, 500 insertions, 0 deletions

diff --git a/navit/plugin/j1850/CMakeLists.txt b/navit/plugin/j1850/CMakeLists.txt
new file mode 100644
index 000000000..0a9e4f011
--- /dev/null
+++ b/navit/plugin/j1850/CMakeLists.txt
@@ -0,0 +1 @@
+module_add_library(plugin_j1850 j1850.c)
diff --git a/navit/plugin/j1850/j1850.c b/navit/plugin/j1850/j1850.c
new file mode 100644
index 000000000..e73affc85
--- /dev/null
+++ b/navit/plugin/j1850/j1850.c
@@ -0,0 +1,499 @@
+/* vim: set tabstop=4 expandtab: */
+/**
+ * Navit, a modular navigation system.
+ * Copyright (C) 2005-2008 Navit Team
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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, USA.
+ */
+
+/* 
+   This plugin implements a small subset of the SAE j1850 protocal used in some cars.
+   So far the code assumes that it is run on Linux. It allows Navit to read the steering
+   wheel inputs and some metrics like RPM or the fuel tank level
+   */
+
+#include <math.h>
+#include <stdio.h>
+#include <glib.h>
+#include <time.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <termios.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include "config.h"
+#include <navit/item.h>
+#include <navit/xmlconfig.h>
+#include <navit/main.h>
+#include <navit/debug.h>
+#include <navit/map.h>
+#include <navit/navit.h>
+#include <navit/callback.h>
+#include <navit/file.h>
+#include <navit/plugin.h>
+#include <navit/event.h>
+#include <navit/command.h>
+#include <navit/config_.h>
+#include "graphics.h"
+#include "color.h"
+#include "osd.h"
+
+const char *init_string[] = {
+	"ATZ\r\n",
+	"ATI\r\n",
+	"ATL1\r\n",
+	"ATH1\r\n",
+	"ATS1\r\n",
+	"ATAL\r\n",
+	"ATMA\r\n",
+    NULL
+};
+
+struct j1850 {
+    struct navit *nav;
+    int status;
+    int device;
+    int index;
+    char message[255];
+    char * filename;
+    struct event_idle *idle;
+    struct callback *callback;
+    struct osd_item osd_item;
+    int width;
+    struct graphics_gc *orange,*white;
+    struct callback *click_cb;
+    int init_string_index;
+
+    int rpm;
+    int tank_level;
+    int odo;
+};
+
+/**
+ * @brief	Generates a fake sentence. Used for debugging
+ * @param[in]	dest	- the char * to which we will write the sentence
+ *              lenght  - the length of the sentence to generate
+ *
+ * @return	nothing
+ *
+ * Generates a fake string to simulate data from the serial port
+ *
+ */
+void rand_str(char *dest, size_t length) {
+    char charset[] = "0123456789"
+                     "ABCDEF";
+
+    while (length-- > 0) {
+        size_t index = (double) rand() / RAND_MAX * (sizeof charset - 1);
+        *dest++ = charset[index];
+    }
+    *dest = '\0';
+}
+
+/**
+ * @brief	Writes 'cmd' to the serial port'
+ * @param[in]	cmd	- the char * that we will write to the serial port
+ *              device  - the serial port device
+ *
+ * @return	nothing
+ *
+ * Write the cmd to the serial port
+ *
+ */
+void write_to_serial_port(unsigned char *cmd, int device)
+{
+	int n_written = 0;
+	do {
+        n_written += write( device, &cmd[n_written], 1 );
+    }
+    while (cmd[n_written-1] != '\r' && n_written > 0);
+    dbg(0,"sent %s to the serial port\n",cmd);
+}
+
+/**
+ * @brief	Function called when navit is idle. Does the continous reading
+ * @param[in]	j1850	- the j1850 struct containing the state of the plugin
+ *
+ * @return	nothing
+ *
+ * This is the main function of this plugin. It is called when navit is idle,
+ * and performs the initialization of the obd device if needed, then reads 
+ * one char each time it is called, and puts this char in a buffer. When it 
+ * reads an EOL character, the buffer is parsed, and the appropriate action is
+ * taken. The buffer is then cleared and we start over.
+ *
+ */
+static void
+j1850_idle(struct j1850 *j1850)
+{
+    int n;             // used to keep track of the numbers of char read from the device
+    int value;         // used to convert the ascii char to an int
+    char buf = '\0';   // the buffer where we store the char read from the device
+    char header[3];    // a buffer to store the j1850 header for easier matching
+    struct timeval tv; // used to timestamp the logs
+    struct attr navit;
+    // Make sure we sent all init commands before trying to read
+    if ( init_string[j1850->init_string_index])
+    {
+        dbg(0,"Sending next init command : %s\n",init_string[j1850->init_string_index]);
+        if (j1850->device > 0 ){
+            write_to_serial_port(init_string[j1850->init_string_index++],j1850->device);
+        }
+
+        // Did we reach the last init command?
+        if ( !init_string[j1850->init_string_index])  
+        { 
+            // if yes, switch to idle read instead of timed read
+            event_remove_timeout(j1850->idle);
+            j1850->idle=event_add_idle(125, j1850->callback);
+        }
+        return;
+    }
+    navit.type=attr_navit;
+    navit.u.navit=j1850->nav;
+
+    // If not connected, generate random messages for debugging purpose
+    if (j1850->device < 0 ){
+	    rand_str(j1850->message,8);
+	    return;
+    }
+    
+    n = read( j1850->device, &buf, 1 );
+    if(n == -1) {
+         dbg(1,"x\n");
+    } else if (n==0) {
+         dbg(1,".\n");
+    } else {
+        if( buf == 13 ) {
+            gettimeofday(&tv, NULL);
+            unsigned long long millisecondsSinceEpoch =
+                (unsigned long long)(tv.tv_sec) * 1000 +
+                (unsigned long long)(tv.tv_usec) / 1000;
+	
+            j1850->message[j1850->index]='\0';
+            FILE *fp;
+            fp = fopen(j1850->filename,"a");
+            fprintf(fp, "%llu,%s\n", millisecondsSinceEpoch, j1850->message);
+            fclose(fp); 
+            strncpy(header, j1850->message, 2);
+            header[2]='\0';
+            if( strncmp(header,"10",2)==0 ) {
+            	char * w1 = strndup(j1850->message+2, 4);
+            	j1850->rpm = ((int)strtol(w1, NULL, 16) ) / 4 ;
+            } else if( strncmp(header,"3D",2)==0 ) {
+                if (strcmp(j1850->message, "3D110000EE") == 0) {
+                    // noise
+                } else if (strcmp(j1850->message, "3D1120009B") == 0) {
+                    dbg(0,"L1\n");
+                    command_evaluate(&navit, "gui.spotify_volume_up()" );
+                } else if (strcmp(j1850->message, "3D110080C8") == 0) {
+                    dbg(0,"L2\n");
+                    command_evaluate(&navit, "gui.spotify_volume_toggle()" );
+                } else if (strcmp(j1850->message, "3D1110005A") == 0) {
+                    dbg(0,"L3\n");
+                    command_evaluate(&navit, "gui.spotify_volume_down()" );
+                } else if (strcmp(j1850->message, "3D110400C3") == 0) {
+                    dbg(0,"R1\n");
+                    command_evaluate(&navit, "gui.spotify_next_track()" );
+                } else if (strcmp(j1850->message, "3D110002D4") == 0) {
+                    dbg(0,"R2\n");
+                    command_evaluate(&navit, "gui.spotify_toggle()" );
+                } else if (strcmp(j1850->message, "3D11020076") == 0) {
+                    dbg(0,"R3\n");
+                    command_evaluate(&navit, "gui.spotify_previous_track()" );
+                } else {
+                    dbg(0,"Got button from %s\n", j1850->message);
+                }
+            } else if( strncmp(header,"72",2)==0 ) {
+            	char * data=strndup(j1850->message+2, 8);
+            	j1850->odo=((int)strtol(data, NULL, 16) )/8000;
+            } else if( strncmp(header,"90",2)==0 ) {
+            } else if( strncmp(header,"A4",2)==0 ) {
+            	char * w1 =strndup(j1850->message+2, 4);
+            	j1850->tank_level = ((int)strtol(w1, NULL, 16) ) / 4 ;
+            } else {
+                // printf(" ascii: %i [%s] with header [%s]\n",buf, response, header);
+            }
+            // Message has been processed. Let's clear it
+            j1850->message[0]='\0';
+            j1850->index=0;
+        } else {
+            value=buf-48;
+            if(value==-16 || buf == 10 ){
+                //space and newline, discard
+                return;
+            } else if (value>16) {
+                // chars, need to shift down
+                value-=7;
+                j1850->message[j1850->index]=buf;
+                j1850->index++;
+            } else if (buf == '<' ) {
+                // We have a data error. Let's truncate the message
+                j1850->message[j1850->index]='\0';
+                j1850->index++;
+            } else {
+                j1850->message[j1850->index]=buf;
+                j1850->index++;
+            }
+            // printf("{%c:%i}", buf,value);
+       }
+   }
+}
+
+/**
+ * @brief	Draws the j1850 OSD 
+ * @param[in]	j1850	- the j1850 struct containing the state of the plugin
+ *              nav     - the navit object
+ * 		v	- the vehicle object
+ *
+ * @return	nothing
+ *
+ * Draws the j1850 OSD. Currently it only displays the last parsed message
+ *
+ */
+static void
+osd_j1850_draw(struct j1850 *this, struct navit *nav,
+        struct vehicle *v)
+{
+    osd_std_draw(&this->osd_item);
+
+    struct point p, bbox[4];
+
+    graphics_get_text_bbox(this->osd_item.gr, this->osd_item.font, this->message, 0x10000, 0, bbox, 0);
+    p.x=(this->osd_item.w-bbox[2].x)/2;
+    p.y = this->osd_item.h-this->osd_item.h/10;
+
+    struct graphics_gc *curr_color = this->white;
+    // online? use  this->bActive?this->white:this->orange;
+    graphics_draw_text(this->osd_item.gr, curr_color, NULL, this->osd_item.font, this->message, &p, 0x10000, 0);
+    graphics_draw_mode(this->osd_item.gr, draw_mode_end);
+}
+
+/**
+ * @brief	Initialize the j1850 OSD
+ * @param[in]	j1850	- the j1850 struct containing the state of the plugin
+ *              nav     - the navit object
+ *
+ * @return	nothing
+ *
+ * Initialize the j1850 OSD
+ *
+ */
+static void
+osd_j1850_init(struct j1850 *this, struct navit *nav)
+{
+
+    struct color c;
+    osd_set_std_graphic(nav, &this->osd_item, (struct osd_priv *)this);
+    
+    // Used when debugging or when the device is offline
+    this->orange = graphics_gc_new(this->osd_item.gr);
+    c.r = 0xFFFF;
+    c.g = 0xA5A5;
+    c.b = 0x0000;
+    c.a = 65535;
+    graphics_gc_set_foreground(this->orange, &c);
+    graphics_gc_set_linewidth(this->orange, this->width);
+
+    // Used when we are receiving real datas from the device
+    this->white = graphics_gc_new(this->osd_item.gr);
+    c.r = 65535;
+    c.g = 65535;
+    c.b = 65535;
+    c.a = 65535;
+    graphics_gc_set_foreground(this->white, &c);
+    graphics_gc_set_linewidth(this->white, this->width);
+
+
+    graphics_gc_set_linewidth(this->osd_item.graphic_fg_white, this->width);
+
+    event_add_timeout(500, 1, callback_new_1(callback_cast(osd_j1850_draw), this));
+
+    j1850_init_serial_port(this);
+
+    // navit_add_callback(nav, this->click_cb = callback_new_attr_1(callback_cast (osd_j1850_click), attr_button, this));
+
+    osd_j1850_draw(this, nav, NULL);
+}
+
+/**
+ * @brief	Sends 'cmd' and reads the reply from the device
+ * @param[in]	cmd	- the char * that we will write to the serial port
+ *              device  - the serial port device
+ *
+ * @return	nothing
+ *
+ * Sends 'cmd' and reads the reply from the device
+ *
+ */
+void send_and_read(unsigned char *cmd, int USB)
+{
+    int n_written = 0;
+    do {
+        n_written += write( USB, &cmd[n_written], 1 );
+    }
+    while (cmd[n_written-1] != '\r' && n_written > 0);
+
+    int n = 0;
+    char buf = '\0';
+
+    /* Whole response*/
+    char response[255];
+
+    do
+    {
+       n = read( USB, &buf, 1 );
+       if(n == -1) {
+            dbg(1,"x");
+       } else if (n==0) {
+            dbg(1,".");
+       } else {
+            dbg(1,"[%s]", &buf);
+       }
+    }
+    while( buf != '\r' && n > 0);
+
+    if (n < 0) {
+            dbg(0,"Read error\n");
+    } else if (n == 0) {
+            dbg(0,"Nothing to read?\n");
+    } else {
+            dbg(0,"Response : \n");
+    }
+}
+
+/**
+ * @brief	Opens the serial port and saves state to the j1850 object
+ * @param[in]	j1850	- the j1850 struct containing the state of the plugin
+ *
+ * @return	nothing
+ *
+ * Opens the serial port and saves state to the j1850 object
+ *
+ */
+void
+j1850_init_serial_port(struct j1850 *j1850)
+{
+	j1850->callback=callback_new_1(callback_cast(j1850_idle), j1850);
+	// Fixme : we should read the device path from the config file
+	j1850->device = open( "/dev/ttyUSB0", O_RDWR| O_NOCTTY );
+	if ( j1850->device < 0 ) 
+	{
+		dbg(0,"Can't open port\n");
+		j1850->idle=event_add_timeout(100, 1, j1850->callback);
+		return;
+	}
+
+	struct termios tty;
+	struct termios tty_old;
+	memset (&tty, 0, sizeof tty);
+	
+	/* Error Handling */
+	if ( tcgetattr ( j1850->device, &tty ) != 0 )
+	{
+	        dbg(0,"Error\n");
+		return;
+	}
+	
+	/* Save old tty parameters */
+	tty_old = tty;
+	
+	/* Set Baud Rate */
+	cfsetospeed (&tty, (speed_t)B115200);
+	cfsetispeed (&tty, (speed_t)B115200);
+	
+	/* Setting other Port Stuff */
+	tty.c_cflag     &=  ~PARENB;        // Make 8n1
+	tty.c_cflag     &=  ~CSTOPB;
+	tty.c_cflag     &=  ~CSIZE;
+	tty.c_cflag     |=  CS8;
+	
+	tty.c_cflag     &=  ~CRTSCTS;       // no flow control
+	tty.c_cc[VMIN]      =   1;                  // read doesn't block
+	tty.c_cc[VTIME]     =   10;                  // 0.5 seconds read timeout
+	tty.c_cflag     |=  CREAD | CLOCAL;     // turn on READ & ignore ctrl lines
+	
+	/* Make raw */
+	cfmakeraw(&tty);
+	
+	/* Flush Port, then applies attributes */
+	tcflush( j1850->device, TCIFLUSH );
+	if ( tcsetattr ( j1850->device, TCSANOW, &tty ) != 0)
+	{
+		dbg(0,"Flush error\n");
+		return;
+	}
+
+	dbg(0,"Port init ok\n");
+    	// For the init part, we want to wait 1sec before each init string
+    	j1850->idle=event_add_timeout(1000, 1, j1850->callback);
+}
+
+/**
+ * @brief	Creates the j1850 OSD and set some default properties
+ * @param[in]	nav	- the navit object
+ *              meth    - the osd_methods
+ * 		attrs	- pointer to the attributes
+ *
+ * @return	nothing
+ *
+ * Creates the j1850 OSD and set some default properties
+ *
+ */
+static struct osd_priv *
+osd_j1850_new(struct navit *nav, struct osd_methods *meth,
+        struct attr **attrs)
+{
+    struct j1850 *this=g_new0(struct j1850, 1);
+    this->nav=nav;
+    time_t current_time = time(NULL);
+    // FIXME : make sure that the directory we log to exists!
+    this->filename=g_strdup_printf("/home/navit/.navit/obd/%i.log",current_time);
+    dbg(0,"Will log to %s\n", this->filename);
+    this->init_string_index=0;
+    struct attr *attr;
+    this->osd_item.p.x = 120;
+    this->osd_item.p.y = 20;
+    this->osd_item.w = 160;
+    this->osd_item.h = 20;
+    this->osd_item.navit = nav;
+    this->osd_item.font_size = 200;
+    this->osd_item.meth.draw = osd_draw_cast(osd_j1850_draw);
+
+    osd_set_std_attr(attrs, &this->osd_item, 2);
+    attr = attr_search(attrs, NULL, attr_width);
+    this->width=attr ? attr->u.num : 2;
+    navit_add_callback(nav, callback_new_attr_1(callback_cast(osd_j1850_init), attr_graphics_ready, this));
+    return (struct osd_priv *) this;
+}
+
+/**
+ * @brief	The plugin entry point
+ *
+ * @return	nothing
+ *
+ * The plugin entry point
+ *
+ */
+void
+plugin_init(void)
+{
+	struct attr callback,navit;
+	struct attr_iter *iter;
+
+	plugin_register_osd_type("j1850", osd_j1850_new);
+}