Diff: main.cpp

Revision:

0:f54e9507171b

diff -r 000000000000 -r f54e9507171b main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Dec 05 22:49:02 2011 +0000
@@ -0,0 +1,207 @@
+/*
+ * FreeModbus Libary: BARE Demo Application
+ * Copyright (C) 2006 Christian Walter <wolti@sil.at>
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * File: $Id: demo.c,v 1.1 2006/08/22 21:35:13 wolti Exp $
+
+* modified from: Thanassis Mavrogeorgiadis 5-12-2011
+ */
+
+#include "mbed.h"
+
+/* ----------------------- Modbus includes ----------------------------------*/
+#include "mb.h"
+#include "mbport.h"
+#include "mbconfig.h"
+
+
+#if MB_TCP_ENABLED == 1
+#include "EthernetNetIf.h"
+EthernetNetIf eth;  
+#endif
+
+extern Serial pc;
+
+DigitalOut led1(LED1);
+
+DigitalIn ENET_LINK(P1_25);
+DigitalOut LedLINK(LED4);
+Ticker EtherPinMonitor;
+
+#if MB_TCP_ENABLED == 1
+void EtherPinMonitorFunc(void)
+{
+  LedLINK = !ENET_LINK; 
+}
+#endif
+
+/* ----------------------- Defines ------------------------------------------*/
+#define REG_INPUT_START 1000
+#define REG_INPUT_NREGS 4
+#define REG_HOLDING_START       2000
+#define REG_HOLDING_NREGS       130
+
+#define SLAVE_ID 0x0A
+
+/* ----------------------- Static variables ---------------------------------*/
+static USHORT   usRegInputStart = REG_INPUT_START;
+static USHORT   usRegInputBuf[REG_INPUT_NREGS];
+static USHORT   usRegHoldingStart = REG_HOLDING_START;
+static USHORT   usRegHoldingBuf[REG_HOLDING_NREGS];
+
+/* ----------------------- Start implementation -----------------------------*/
+
+
+int main() {
+  eMBErrorCode    eStatus;
+
+#if MB_TCP_ENABLED == 1
+  pc.baud(115200);
+  EtherPinMonitor.attach(&EtherPinMonitorFunc, 0.01);
+  printf("Setting up...\n");
+  EthernetErr ethErr = eth.setup();
+  if(ethErr)
+  {
+    printf("Error %d in setup.\n", ethErr);
+    return -1;
+  }
+  printf("Setup OK\n");
+#endif
+   
+  Timer tm;
+  tm.start();
+
+#if MB_RTU_ENABLED == 1
+    eStatus = eMBInit( MB_RTU, SLAVE_ID, 0, 9600, MB_PAR_NONE );
+#endif
+#if MB_ASCII_ENABLED == 1
+    eStatus = eMBInit( MB_ASCII, SLAVE_ID, 0, 9600, MB_PAR_NONE );
+#endif
+#if MB_TCP_ENABLED == 1
+    eStatus = eMBTCPInit( MB_TCP_PORT_USE_DEFAULT );
+#endif
+    if (eStatus != MB_ENOERR )
+      printf( "can't initialize modbus stack!\r\n" );
+
+    /* Enable the Modbus Protocol Stack. */
+    eStatus = eMBEnable(  );
+    if (eStatus != MB_ENOERR )
+      fprintf( stderr, "can't enable modbus stack!\r\n" );
+
+  // Initialise some registers
+  usRegInputBuf[1] = 0x1234;
+  usRegInputBuf[2] = 0x5678;
+  usRegInputBuf[3] = 0x9abc;        
+
+  while(true)
+  {
+#if MB_TCP_ENABLED == 1
+    Net::poll();
+#endif
+    if(tm.read()>.5)
+    {
+      led1=!led1; //Show that we are alive
+      tm.start();
+    }
+
+    eStatus = eMBPoll(  );
+            
+    /* Here we simply count the number of poll cycles. */
+    usRegInputBuf[0]++;
+  }
+  return 0;
+}
+
+eMBErrorCode
+eMBRegInputCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs )
+{
+    eMBErrorCode    eStatus = MB_ENOERR;
+    int             iRegIndex;
+
+    if( ( usAddress >= REG_INPUT_START )
+        && ( usAddress + usNRegs <= REG_INPUT_START + REG_INPUT_NREGS ) )
+    {
+        iRegIndex = ( int )( usAddress - usRegInputStart );
+        while( usNRegs > 0 )
+        {
+            *pucRegBuffer++ = ( unsigned char )( usRegInputBuf[iRegIndex] >> 8 );
+            *pucRegBuffer++ = ( unsigned char )( usRegInputBuf[iRegIndex] & 0xFF );
+            iRegIndex++;
+            usNRegs--;
+        }
+    }
+    else
+    {
+        eStatus = MB_ENOREG;
+    }
+    return eStatus;
+}
+
+eMBErrorCode
+eMBRegHoldingCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs, eMBRegisterMode eMode )
+{
+    eMBErrorCode    eStatus = MB_ENOERR;
+    int             iRegIndex;
+
+    if( ( usAddress >= REG_HOLDING_START ) &&
+        ( usAddress + usNRegs <= REG_HOLDING_START + REG_HOLDING_NREGS ) )
+    {
+        iRegIndex = ( int )( usAddress - usRegHoldingStart );
+        switch ( eMode )
+        {
+            /* Pass current register values to the protocol stack. */
+        case MB_REG_READ:
+            while( usNRegs > 0 )
+            {
+                *pucRegBuffer++ = ( UCHAR ) ( usRegHoldingBuf[iRegIndex] >> 8 );
+                *pucRegBuffer++ = ( UCHAR ) ( usRegHoldingBuf[iRegIndex] & 0xFF );
+                iRegIndex++;
+                usNRegs--;
+            }
+            break;
+
+            /* Update current register values with new values from the
+             * protocol stack. */
+        case MB_REG_WRITE:
+            while( usNRegs > 0 )
+            {
+                usRegHoldingBuf[iRegIndex] = *pucRegBuffer++ << 8;
+                usRegHoldingBuf[iRegIndex] |= *pucRegBuffer++;
+                iRegIndex++;
+                usNRegs--;
+            }
+        }
+    }
+    else
+    {
+        eStatus = MB_ENOREG;
+    }
+    return eStatus;
+}
+
+eMBErrorCode
+eMBRegCoilsCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNCoils, eMBRegisterMode eMode )
+{
+    return MB_ENOREG;
+}
+
+eMBErrorCode
+eMBRegDiscreteCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNDiscrete )
+{
+    return MB_ENOREG;
+}
+