1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/* GPS speedometer as a wrapper around an Athena widget Tachometer
* - Derrick J Brashear <shadow@dementia.org>
* Tachometer widget from Kerberometer (xklife)
*/
#include "config.h"
#include "xgpsspeed.h"
#include "xgpsspeed.icon"
#include "nmea.h"
#include <unistd.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#define BUFSIZE 4096
#define DEFAULTPORT "2947"
char latd, lond;
double latitude, longitude;
int device_type;
int debug = 0;
#if defined(ultrix) || defined(SOLARIS)
extern double rint();
#endif
Widget toplevel, base;
Widget tacho, label, title;
static XrmOptionDescRec options[] = {
{"-rv", "*reverseVideo", XrmoptionNoArg, "TRUE"},
{"-nc", "*needleColor", XrmoptionSepArg, NULL},
{"-needlecolor","*needleColor", XrmoptionSepArg, NULL},
};
/*
* Definition of the Application resources structure.
*/
typedef struct _XGpsResources {
} XGpsResources;
XGpsResources resources;
#define Offset(field) (XtOffset(XGpsResources *, field))
static XtResource my_resources[] = {
};
String fallback_resources[] =
{
};
static void open_input(XtAppContext app);
#undef Offset
int errexit(char *s)
{
perror(s);
//serial_close();
exit(1);
}
int
main(int argc, char **argv)
{
Arg args[10];
XtAppContext app;
Cardinal i;
char *cp;
int ret;
toplevel = XtVaAppInitialize(&app, "XGpsSpeed", options, XtNumber(options),
&argc, argv, fallback_resources, NULL);
XtGetApplicationResources( toplevel, (caddr_t) &resources,
my_resources, XtNumber(my_resources),
NULL, (Cardinal) 0);
/**** Shell Widget ****/
i = 0;
XtSetArg(args[0], XtNiconPixmap,
XCreateBitmapFromData(XtDisplay(toplevel),
XtScreen(toplevel)->root, xgps_bits,
xgps_width, xgps_height)); i++;
XtSetValues(toplevel, args, i);
/**** Form widget ****/
base = XtCreateManagedWidget("pane", panedWidgetClass, toplevel, NULL, 0);
/**** Label widget (Title) ****/
i = 0;
XtSetArg(args[i], XtNlabel, "GPS Speedometer"); i++;
label = XtCreateManagedWidget("title", labelWidgetClass,
base, args, i);
/**** Label widget ****/
i = 0;
XtSetArg(args[i], XtNlabel, "Miles per Hour"); i++;
label = XtCreateManagedWidget("name", labelWidgetClass,
base, args, i);
/**** Tachometer widget ****/
tacho = XtCreateManagedWidget("meter",
tachometerWidgetClass,
base, NULL, 0);
XtRealizeWidget(toplevel);
open_input(app);
XtAppMainLoop(app);
}
Usage()
{
fprintf(stderr,
"xgpsspeed <Toolkit Options> [-rv] [-nc needlecolor]\n");
exit(-1);
}
#if 0
#if defined(i386) || defined(__hpux)
#define rint (int)
#endif
#endif
void update_display()
{
int new = rint(gNMEAdata.speed * 6076.12 / 5280);
// fprintf(stderr, "gNMEAspeed %f scaled %f %d\n", gNMEAdata.speed, rint(gNMEAdata.speed * 5208/6706.12), (int)rint(gNMEAdata.speed * 5208/6706.12));
if (new > 100)
new = 100;
TachometerSetValue(tacho, new);
}
static void handle_input(XtPointer client_data, int *source, XtInputId * id)
{
double speed;
static unsigned char buf[BUFSIZE]; /* that is more than a sentence */
static int offset = 0;
int count;
int flags;
ioctl(*source, FIONREAD, &count);
/* Make the port NON-BLOCKING so reads will not wait if no data */
if ((flags = fcntl(*source, F_GETFL)) < 0) return;
if (fcntl(*source, F_SETFL, flags | O_NDELAY) < 0) return;
while (offset < BUFSIZE && count--) {
if (read(*source, buf + offset, 1) != 1)
return;
if (buf[offset] == '\n') {
if (buf[offset - 1] == '\r')
buf[offset - 1] = '\0';
handle_message(buf);
update_display();
offset = 0;
return;
}
offset++;
}
}
int my_serial_open()
{
char *temp;
char *p;
char *port = DEFAULTPORT;
char *device_name="localhost";
int one = 1;
int ttyfd;
temp = malloc(strlen(device_name) + 1);
strcpy(temp, device_name);
//temp now holds the HOSTNAME portion and port the port number.
ttyfd = connectTCP(temp, port);
free(temp);
port = 0;
setsockopt(ttyfd, SOL_SOCKET, SO_REUSEADDR, (char *) &one, sizeof(one));
if (write(ttyfd, "r\n", 2) != 2)
errexit("Can't write to socket");
return ttyfd;
}
static void open_input(XtAppContext app)
{
int input = 0;
XtInputId input_id;
input = my_serial_open();
input_id = XtAppAddInput(app, input, (XtPointer) XtInputReadMask,
handle_input, NULL);
}
|
