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sdk:dio2modbustcp [2015/05/12 09:44] – fachetsdk:dio2modbustcp [2018/01/24 15:53] (current) – juraschek
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 /* DESC: This script can be used to access to the digital I/Os via Modbus TCP /* DESC: This script can be used to access to the digital I/Os via Modbus TCP
  * Copyright (C) 2015 NetModule AG, Switzerland  * Copyright (C) 2015 NetModule AG, Switzerland
- * supports Read Coil Status (FC01), Read Input Status (FC02) and Force Single Coil (FC05)+ * 
 + *   Commands:    
 + *     Read Coil Status (FC01) 
 + *     Read Input Status (FC02) 
 + *     Read Input Register (FC04) 
 + *     Force Single Coil (FC05) 
 + *     Write Multiple Coils (FC15) 
 + *        
  *   Mapping:   *   Mapping: 
  *     Coil status(digital I/O): 1=out1, 2=out2  *     Coil status(digital I/O): 1=out1, 2=out2
  *     Input satus(digital In): 1=in1, 2=in2    *     Input satus(digital In): 1=in1, 2=in2  
  *     Input register : 1=temperature 2=mobile 1 rsrp  *     Input register : 1=temperature 2=mobile 1 rsrp
 + *
  */  */
  
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     break;         break;    
     }     }
-    return ret;+  return ret;
 } }
  
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   exit(3);    exit(3); 
 }  } 
 +
 cfd = -1;  cfd = -1; 
 for(;;) { for(;;) {
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     }     }
   }   }
 +  
   if ((r = nb_modbus_receive(cfd)) == NULL) {   if ((r = nb_modbus_receive(cfd)) == NULL) {
     printf("Unable to receive request (%s)\n", nb_modbus_last_error());     printf("Unable to receive request (%s)\n", nb_modbus_last_error());
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     continue;     continue;
   }    } 
 +  
   if (r[6] != SLAVEID)   if (r[6] != SLAVEID)
     continue; // not for us      continue; // not for us 
 +  
   cmd = r[7]; // command   cmd = r[7]; // command
-  switch (cmd) { +  switch (cmd) { // write commands 
-    case 1: // read coil status +
-    case 2: // read input status +
-      break; // no write action, only reply needed+
     case 5: // write to a single coil     case 5: // write to a single coil
       addr = r[8]<<8 + r[9];       addr = r[8]<<8 + r[9];
       data = r[10]<<8 + r[11];       data = r[10]<<8 + r[11];
-    if (set_io(addr, data) == -1) +      if (set_io(addr, data) == -1) 
-    continue; // error+        continue; // error
       break;       break;
-    case 15: +    case 15: // write to multiple coils 
-    addr = r[8]<<8 + r[9]; +      addr = r[8]<<8 + r[9]; 
-    cnt = r[10]<<8 + r[11];+      cnt = r[10]<<8 + r[11];
       for (i = 0; i < cnt; i ++)       for (i = 0; i < cnt; i ++)
         if (set_io(addr+i, (int) (r[13+i/8] & 1<<(i%256))) == -1)         if (set_io(addr+i, (int) (r[13+i/8] & 1<<(i%256))) == -1)
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     case 2: // read input status     case 2: // read input status
     case 5: // write to a single coil     case 5: // write to a single coil
-  case 4: // read input register +    case 4: // read input register 
-  case 15: // write to multiple coil +    case 15: // write to multiple coils 
-    syst = nb_status("system"); +      syst = nb_status("system"); 
-    wwan = nb_status("wwan");+      wwan = nb_status("wwan");
       resp = mkstruct(       resp = mkstruct(
         "bits", mkarray(nb_dio_get("out1"), nb_dio_get("out2")),         "bits", mkarray(nb_dio_get("out1"), nb_dio_get("out2")),
         "ibits", mkarray(nb_dio_get("in1"), nb_dio_get("in2")),         "ibits", mkarray(nb_dio_get("in1"), nb_dio_get("in2")),
-        "regs", mkarray(),+        "regs", mkarray(0,0),
         "iregs", mkarray((int)syst.TEMPERATURE, (int)wwan.MOBILE1_RSRP)         "iregs", mkarray((int)syst.TEMPERATURE, (int)wwan.MOBILE1_RSRP)
       );       );
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   }   }
 }    }   
-/* not reached */</code>+/* not reached */ 
 +</code>

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sdk/dio2modbustcp.txt · Last modified: 2018/01/24 15:53 by juraschek