Statistics
| Branch: | Revision:

root / mainbox / tool.c @ 38df0012

History | View | Annotate | Download (4.28 KB)

1
#include "tool.h"
2
#include "query.h"
3
#include "event.h"
4
#include "tooltron_mb.h"
5
#include <modbus.h>
6
#include <stdio.h>
7
#include <errno.h>
8

    
9
modbus_t *ctx;
10

    
11
int tool_init_mb(const char *device) {
12
  struct timeval timeout;
13

    
14
  ctx = modbus_new_rtu(device, MB_BAUD, 'N', 8, 1);
15
  if (ctx == NULL) {
16
    fprintf(stderr, "modbus_new_rtu: %s\n", modbus_strerror(errno));
17
    return 1;
18
  }
19

    
20
  if (modbus_connect(ctx) == -1) {
21
    fprintf(stderr, "modbus_connect: %s\n", modbus_strerror(errno));
22
    modbus_free(ctx);
23
    return 1;
24
  }
25

    
26
  modbus_get_response_timeout(ctx, &timeout);
27
  printf("Response timeout is %lus %luus\n", timeout.tv_sec, timeout.tv_usec);
28

    
29
  return 0;
30
}
31

    
32
void tool_close_mb() {
33
  modbus_close(ctx);
34
  modbus_free(ctx);
35
}
36

    
37
static void tool_write_coil(int addr, int bit) {
38
  if (modbus_write_bit(ctx, addr, bit) == -1) {
39
    fprintf(stderr, "modbus_write_bit: %s\n", modbus_strerror(errno));
40
  }
41
}
42

    
43
static void tool_init(struct tool_t *tool) {
44
  // TODO write current limit values
45
  tool_write_coil(MB_COIL_INIT, 1);
46
  tool->state = TS_OFF;
47
}
48

    
49
static void tool_read_user(struct tool_t *tool) {
50
  unsigned short serno[2];
51
  if (modbus_read_input_registers(ctx, MB_INP_SERNOL, 2, serno) == -1) {
52
    fprintf(stderr, "modbus_read_registers: %s\n", modbus_strerror(errno));
53
    tool->user = 0;
54
  } else {
55
    tool->user = MODBUS_GET_INT32_FROM_INT16(serno, 0);
56
  }
57
}
58

    
59
static void tool_grant_access(struct tool_t *tool) {
60

    
61
  printf("Granting access to %08x on %s (%d)\n", tool->user, tool->name,
62
      tool->address);
63

    
64
  tool_write_coil(MB_COIL_EN, 1);
65
  tool->state = TS_ON;
66

    
67
  tool->event = event_alloc();
68
  tool->event->user = tool->user;
69
  tool->event->tool_id = tool->address;
70
  tool->event->tstart = time(NULL);
71
  tool->event->succ = 1;
72
}
73

    
74
static void tool_deny_access(struct tool_t *tool) {
75
  struct event_t *event;
76

    
77
  printf("Denying access to %08x on %s (%d)\n", tool->user, tool->name,
78
      tool->address);
79

    
80
  tool_write_coil(MB_COIL_EN, 0);
81
  tool->state = TS_OFF;
82

    
83
  event = event_alloc();
84
  event->user = tool->user;
85
  event->tool_id = tool->address;
86
  event->tstart = time(NULL);
87
  event->tend = event->tstart;
88
  event->succ = 0;
89
  event_q_push(event);
90
}
91

    
92
static void tool_off(struct tool_t *tool) {
93
  tool->state = TS_OFF;
94
  tool->event->tend = time(NULL);
95
  event_q_push(tool->event);
96
  tool->event = NULL;
97
}
98

    
99
void tool_request_disable(struct tool_t *tool) {
100
  printf("Requesting disable on %s (%d)\n", tool->name, tool->address);
101
  tool_write_coil(MB_COIL_REQ_DIS, 1);
102
  tool->state = TS_REQ_DIS;
103
}
104

    
105
void tool_poll(struct tool_t *tool) {
106
  unsigned char status[N_COILS];
107

    
108
  if (modbus_set_slave(ctx, tool->address) == -1) {
109
    fprintf(stderr, "modbus_set_slave: %s\n", modbus_strerror(errno));
110
  }
111

    
112
  /* If we can't read from the tool, we only want this error message to print
113
   * once, thus tool->connected */
114
  if (modbus_read_bits(ctx, 0, N_COILS, status) == -1) {
115
    if (tool->connected) {
116
      fprintf(stderr, "Cannot connect to %s (%d): %s\n", tool->name,
117
          tool->address, modbus_strerror(errno));
118
      tool->connected = 0;
119
    }
120
    return;
121
  } else if (!tool->connected) {
122
    fprintf(stderr, "Reconnected to %s (%d)\n", tool->name, tool->address);
123
    tool->connected = 1;
124
  }
125

    
126
  /*uint16_t current;
127
  if (modbus_read_input_registers(ctx, MB_INP_CURRENT, 1, &current) == -1) {
128
    fprintf(stderr, "modbus_read_registers: %s\n", modbus_strerror(errno));
129
  } else {
130
    printf("Current: %d\n", current);
131
  }*/
132

    
133
  /*printf("new:%d en:%d req_dis:%d init:%d\n", status[MB_COIL_NEW],
134
      status[MB_COIL_EN], status[MB_COIL_REQ_DIS], status[MB_COIL_INIT]);*/
135

    
136
  if (!status[MB_COIL_INIT]) {
137
    tool->state = TS_INIT;
138
  }
139

    
140
  switch (tool->state) {
141

    
142
    case TS_INIT:
143
      tool_init(tool);
144
      break;
145

    
146
    case TS_OFF:
147
      if (status[MB_COIL_NEW]) {
148
        tool_read_user(tool);
149
        if (query_user_permission(tool->address, tool->user)) {
150
          tool_grant_access(tool);
151
        } else {
152
          tool_deny_access(tool);
153
        }
154
      }
155
      break;
156

    
157
    case TS_ON:
158
      if (!status[MB_COIL_EN]) {
159
        printf("Tool %s (%d) is off\n", tool->name, tool->address);
160
        tool_off(tool);
161
      }
162
      break;
163

    
164
    case TS_REQ_DIS:
165
      if (!status[MB_COIL_EN]) {
166
        printf("Tool %s (%d) is off after requested disable\n", tool->name,
167
            tool->address);
168
        tool_off(tool);
169
      }
170
      break;
171

    
172
  }
173

    
174
}