Statistics
| Branch: | Revision:

root / mainbox / tool.c @ 15fa09f7

History | View | Annotate | Download (3.78 KB)

1
#include "tool.h"
2
#include "query.h"
3
#include "tooltron_mb.h"
4
#include <modbus.h>
5
#include <stdio.h>
6
#include <errno.h>
7
#include <stdlib.h> // TODO temporary
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
  printf("Granting access to %08x on %s (%d)\n", tool->user, tool->name,
61
      tool->address);
62
  tool_write_coil(MB_COIL_EN, 1);
63
  tool->state = TS_ON;
64
}
65

    
66
static void tool_deny_access(struct tool_t *tool) {
67
  printf("Denying access to %08x on %s (%d)\n", tool->user, tool->name,
68
      tool->address);
69
  tool_write_coil(MB_COIL_EN, 0);
70
  tool->state = TS_OFF;
71
}
72

    
73
void tool_request_disable(struct tool_t *tool) {
74
  printf("Requesting disable on %s (%d)\n", tool->name, tool->address);
75
  tool_write_coil(MB_COIL_REQ_DIS, 1);
76
  tool->state = TS_REQ_DIS;
77
}
78

    
79
void tool_poll(struct tool_t *tool) {
80
  unsigned char status[N_COILS];
81

    
82
  if (modbus_set_slave(ctx, tool->address) == -1) {
83
    fprintf(stderr, "modbus_set_slave: %s\n", modbus_strerror(errno));
84
  }
85

    
86
  /* If we can't read from the tool, we only want this error message to print
87
   * once, thus tool->connected */
88
  if (modbus_read_bits(ctx, 0, N_COILS, status) == -1) {
89
    if (tool->connected) {
90
      fprintf(stderr, "Cannot connect to %s (%d): %s\n", tool->name,
91
          tool->address, modbus_strerror(errno));
92
      tool->connected = 0;
93
    }
94
    return;
95
  } else if (!tool->connected) {
96
    fprintf(stderr, "Reconnected to %s (%d)\n", tool->name, tool->address);
97
    tool->connected = 1;
98
  }
99

    
100
  /*uint16_t current;
101
  if (modbus_read_input_registers(ctx, MB_INP_CURRENT, 1, &current) == -1) {
102
    fprintf(stderr, "modbus_read_registers: %s\n", modbus_strerror(errno));
103
  } else {
104
    printf("Current: %d\n", current);
105
  }*/
106

    
107
  /*printf("new:%d en:%d req_dis:%d init:%d\n", status[MB_COIL_NEW],
108
      status[MB_COIL_EN], status[MB_COIL_REQ_DIS], status[MB_COIL_INIT]);*/
109

    
110
  if (!status[MB_COIL_INIT]) {
111
    tool->state = TS_INIT;
112
  }
113

    
114
  switch (tool->state) {
115

    
116
    case TS_INIT:
117
      tool_init(tool);
118
      break;
119

    
120
    case TS_OFF:
121
      if (status[MB_COIL_NEW]) {
122
        tool_read_user(tool);
123
        if (query_user_permission(tool->address, tool->user)) {
124
          tool_grant_access(tool);
125
        } else {
126
          tool_deny_access(tool);
127
        }
128
      }
129
      break;
130

    
131
    case TS_ON:
132
      if (!status[MB_COIL_EN]) {
133
        printf("Tool %s (%d) is off\n", tool->name, tool->address);
134
        tool->state = TS_OFF;
135
      }
136
      break;
137

    
138
    case TS_REQ_DIS:
139
      if (!status[MB_COIL_EN]) {
140
        printf("Tool %s (%d) is off after requested disable\n", tool->name,
141
            tool->address);
142
        tool->state = TS_OFF;
143
      }
144
      break;
145

    
146
  }
147

    
148
}