Diff: mbrtucustom.cpp

Revision:

3:4cda95d7b6c5

Child:

4:7621103c5a40

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbrtucustom.cpp	Mon Jan 06 01:17:26 2020 +0000
@@ -0,0 +1,113 @@
+/* 
+ * FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
+ * Copyright (c) 2006 Christian Walter <wolti@sil.at>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * File: $Id: mbtcp.c,v 1.3 2006/12/07 22:10:34 wolti Exp $
+ */
+
+/* ----------------------- System includes ----------------------------------*/
+#include "stdlib.h"
+#include "string.h"
+
+/* ----------------------- Platform includes --------------------------------*/
+#include "port.h"
+
+/* ----------------------- Modbus includes ----------------------------------*/
+#include "mb.h"
+#include "mbconfig.h"
+#include "mbrtucustom.h"
+#include "mbframe.h"
+#include "mbport.h"
+
+#if MB_RTU_CUSTOM_ENABLED == 1
+
+/* ----------------------- Defines ------------------------------------------*/
+
+/* ----------------------- MBAP Header --------------------------------------*/
+
+/* ----------------------- Start implementation -----------------------------*/
+eMBErrorCode
+eMBRTUCustInit( UCHAR ucMBAddress )
+{
+    return MB_ENOERR;
+}
+
+void
+eMBRTUCustStart( void )
+{
+}
+
+void
+eMBRTUCustStop( void )
+{
+}
+
+eMBErrorCode
+eMBRTUCustReceive( UCHAR * pucRcvAddress, UCHAR ** ppucFrame, USHORT * pusLength )
+{
+    eMBErrorCode    eStatus = MB_EIO;
+    UCHAR          *pucMBFrame;
+    USHORT          usLength;
+    
+    ENTER_CRITICAL_SECTION(  );
+    if( xMBRTUCustGetPDU( &pucMBFrame, &usLength ) != FALSE )
+    {
+
+        //TODO: check modbus CRC vs LoRa CRC (redundant if both)
+
+        // usMBCRC16( ( UCHAR * ) ucRTUBuf, usRcvBufferPos ) == 0;
+        *pucRcvAddress = pucMBFrame[0]; //TODO: check this is address for modbus RTU
+        *ppucFrame = &pucMBFrame[1];
+        *pusLength = usLength - 1; // removed address
+        eStatus = MB_ENOERR;
+    }
+    else
+    {
+        eStatus = MB_EIO;
+    }
+    EXIT_CRITICAL_SECTION(  );
+    return eStatus;
+}
+
+eMBErrorCode
+eMBRTUCustSend( UCHAR ucSlaveAddress, const UCHAR * pucFrame, USHORT usLength )
+{
+    eMBErrorCode    eStatus = MB_ENOERR;
+    UCHAR           *pucMBFrame;
+    
+    /* First byte before the Modbus-PDU is the slave address. */
+    pucMBFrame = ( UCHAR * ) pucFrame - 1;
+    *pucMBFrame = ucSlaveAddress;
+    usLength++;
+
+    if( xMBRTUCustSendResponse( pucMBFrame, usLength ) == FALSE )
+    {
+        eStatus = MB_EIO;
+    }
+    return eStatus;
+}
+
+#endif
\ No newline at end of file