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2015-05-02 00:14:40 +02:00
commit 40e18d4172
40 changed files with 6547 additions and 0 deletions
--- a/Mudbus.h
+++ b/Mudbus.h
@ -0,0 +1,96 @@
+/*
+    Mudbus.h - an Arduino library for a Modbus TCP slave.
+    Copyright (C) 2011  Dee Wykoff
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+//#define MbDebug
+
+// For Arduino 0022
+// #include "WProgram.h"
+// For Arduino 1.0
+#include "Arduino.h"
+
+#include <SPI.h>
+#include <WiFi.h>
+
+#ifndef Mudbus_h
+#define Mudbus_h
+
+#define MbDebug
+
+#define MB_N_R 125 //Max 16 bit registers for Modbus is 125
+#define MB_N_C 128 //Max coils for Modbus is 2000 - dont need that many so here is a multiple of 8
+#define MB_PORT 502
+
+enum MB_FC {
+  MB_FC_NONE           = 0,
+  MB_FC_READ_COILS     = 1,
+  MB_FC_READ_REGISTERS = 3,
+  MB_FC_WRITE_COIL     = 5,
+  MB_FC_WRITE_REGISTER = 6,
+  //Function codes 15 & 16 by Martin Pettersson http://siamect.com
+  MB_FC_WRITE_MULTIPLE_COILS = 15,
+  MB_FC_WRITE_MULTIPLE_REGISTERS = 16
+};
+
+class Mudbus
+{
+public:
+  Mudbus();
+  void Run();  
+  int  R[MB_N_R];
+  bool C[MB_N_C];  
+  bool Active;    
+  unsigned long PreviousActivityTime;
+  int Runs, Reads, Writes;
+private: 
+  uint8_t ByteArray[260];
+  MB_FC FC;
+  void SetFC(int fc);
+};
+
+#endif
+
+/* Speculations on Modbus message structure:
+**********************************************
+**********Master(PC) request frames***********
+00 ID high              0
+01 ID low               1
+02 Protocol high        0
+03 Protocol low         0
+04 Message length high  0
+05 Message length low   6 (6 bytes after this)
+06 Slave number         1
+07 Function code
+08 Start address high   maybe 0
+09 Start address low    maybe 0
+10 Length high          maybe 125 or Data high if write
+11 Length low           maybe 125 or Data low if write
+**********************************************
+**********Slave(Arduino) response frames******
+00 ID high              echo  /           0
+01 ID low               echo  /  slave ID 1
+02 Protocol high        echo
+03 Protocol low         echo
+04 Message length high  echo
+05 Message length low   num bytes after this
+06 Slave number         echo
+07 Function code        echo
+08 Start address high   num bytes of data
+09 Data high
+10 Data low
+**********************************************
+*/