-
Notifications
You must be signed in to change notification settings - Fork 0
/
client_tcp.c
181 lines (143 loc) · 4.25 KB
/
client_tcp.c
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
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <sys/time.h>
#include <errno.h>
#include "modbus.h"
#define MODBUS_CLIENT_IP "192.168.1.5"
#define MODBUS_CLIENT_PORT 502
#define MODBUS_DEVICE_ID 10
#define MODBUS_TIMEOUT_SEC 3
#define MODBUS_TIMEOUT_USEC 0
#define MODBUS_DEBUG ON
#define MODUBS_HOLDING_ADDR 0
#define MODUBS_HOLDING_LEN 64
int main(int argc, char *argv[])
{
modbus_t *ctx;
struct timeval timeout;
int ret, ii;
/*uint8_t bits[MODBUS_MAX_READ_BITS] = {0};*/
uint16_t regs[MODBUS_MAX_READ_REGISTERS] = {0};
char regs2[MODBUS_MAX_READ_REGISTERS] = {0};
unsigned int regs3;
char *flo_byte;
// unsigned int dec_float;
uint16_t little_endian[2]={0};
uint16_t index;
float f, *_float;
FILE *fp = NULL;
/* if(argc != 3){
printf("INsufficient argument");
return 1;
} */
ctx = modbus_new_tcp(MODBUS_CLIENT_IP, MODBUS_CLIENT_PORT);
/* set device ID */
modbus_set_slave(ctx, MODBUS_DEVICE_ID);
/* Debug mode */
modbus_set_debug(ctx, MODBUS_DEBUG);
/* set timeout */
timeout.tv_sec = MODBUS_TIMEOUT_SEC;
timeout.tv_usec = MODBUS_TIMEOUT_USEC;
modbus_get_byte_timeout(ctx, &timeout);
timeout.tv_sec = MODBUS_TIMEOUT_SEC;
timeout.tv_usec = MODBUS_TIMEOUT_USEC;
modbus_set_response_timeout(ctx, &timeout);
if (modbus_connect(ctx) == -1) {
fprintf(stderr, "Connexion failed: %s\n",
modbus_strerror(errno));
modbus_free(ctx);
exit(-1);
}
/* write data in test.txt */
fp = fopen("test.txt", "a+");
if(fp == NULL)
{
printf("fail to open file!\n");
return -1;
}
/* read holding registers (0x03 function code) */
/*
ret = modbus_read_registers(ctx, strtol(argv[1], NULL, 16), strtol(argv[2], NULL, 10), regs);
if (ret < 0) {
fprintf(stderr, "%s\n", modbus_strerror(errno));
}
else {
printf("HOLDING REGISTERS:\n");
for (ii=0; ii < ret; ii++) {
sprintf(regs2, "%d", regs[ii]);
fputs(regs2, fp);
fputs("\n", fp);
printf("[%d]=%d\n", ii, regs[ii]);
}
}
*/
ret = modbus_read_registers(ctx, 0x1521, 7,regs);
if(ret < 0){
fprintf(stderr, "%s\n", modbus_strerror(errno));
}
else{
index = 0x1521;
printf("HOLDING REGISTER:\n");
for(ii=0; ii < ret; ii++, index++){
sprintf(regs2, "%d", regs[ii]);
fprintf(fp, "%x",index);
fputs(":", fp);
fputs(regs2, fp);
if(ii < ret-1)
fputs(",", fp);
if(ii == ret-1)
fputs("\n", fp);
printf("[%d]=%d\n", ii, regs[ii]);
}
}
f = 60.0;
flo_byte = (char *)&f;
/* big_endian[0] = flo_byte[2]*256 + flo_byte[3];
big_endian[1] = flo_byte[0]*256 + flo_byte[1];*/
little_endian[0] = flo_byte[1]*256 + flo_byte[0];
little_endian[1] = flo_byte[3]*256 + flo_byte[2];
ret = modbus_write_registers(ctx, strtol(argv[1], NULL, 16), 2, &little_endian[0]);
if (ret < 0) {
fprintf(stderr, "%s\n", modbus_strerror(errno));
}
ret = modbus_read_registers(ctx, 0x1066, 2,regs);
if(ret < 0){
fprintf(stderr, "%s\n", modbus_strerror(errno));
}
else{
printf("HOLDING REGISTER:\n");
/*INT轉float*/
regs3 = (regs[1] * 65536) + regs[0];
_float = (float *)(®s3);
fprintf(fp, "%f",*_float);
fputs("\n", fp);
printf("%f\n", *_float);
}
ret = modbus_read_registers(ctx, 0x10c8, 100,regs);
if(ret < 0){
fprintf(stderr, "%s\n", modbus_strerror(errno));
}
else{
index = 0x10c8;
printf("HOLDING REGISTER:\n");
for(ii=0; ii < ret; ii++, index++){
sprintf(regs2, "%d", regs[ii]);
fprintf(fp, "%x",index);
fputs(":", fp);
fputs(regs2, fp);
if(ii < ret-1)
fputs(",", fp);
if(ii == ret-1)
fputs("\n", fp);
printf("[%d]=%d\n", ii, regs[ii]);
}
}
fclose(fp);
/* Close the connection */
modbus_close(ctx);
modbus_free(ctx);
exit(0);
}