Daniel McKinnell / Modbus-Slave

Forking https://os.mbed.com/users/cam/code/Modbus/ to work for NUCLEO 64 boards

Fork of Cam's original FreeModbus port (https://os.mbed.com/users/cam/code/Modbus/)

Change: - Serial implementation to work for NUCLEO 64 boards and receive interrupts instead of timer. (see `portserial.cpp`)

Added: - Custom RTU mode. Allows for external implementation of packet receiving and sending. Sends and receives packets as whole frames (address + PDU) (i.e. this was added for a custom LoRa implementation). implement `xMBRTUCustGetPDU` and `xMBRTUCustSendResponse` (see `mbport.h`) and call `eMBRTUCustomInit( address )`. implementations need to be fully initialised as `eMBRTUCustomInit` only sets the address and nothing else.

mbcrc.cpp@4:7621103c5a40, 2020-08-04 (annotated)

Committer:
danielmckinnell
Date:
Tue Aug 04 04:42:52 2020 +0000
Revision:
4:7621103c5a40
Parent:
0:0453a0a7e500 
RTU Serial updates

Who changed what in which revision?

UserRevisionLine numberNew contents of line
cam 0:0453a0a7e500 1 /*
cam 0:0453a0a7e500 2 * FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
cam 0:0453a0a7e500 3 * Copyright (c) 2006 Christian Walter <wolti@sil.at>
cam 0:0453a0a7e500 4 * All rights reserved.
cam 0:0453a0a7e500 5 *
cam 0:0453a0a7e500 6 * Redistribution and use in source and binary forms, with or without
cam 0:0453a0a7e500 7 * modification, are permitted provided that the following conditions
cam 0:0453a0a7e500 8 * are met:
cam 0:0453a0a7e500 9 * 1. Redistributions of source code must retain the above copyright
cam 0:0453a0a7e500 10 * notice, this list of conditions and the following disclaimer.
cam 0:0453a0a7e500 11 * 2. Redistributions in binary form must reproduce the above copyright
cam 0:0453a0a7e500 12 * notice, this list of conditions and the following disclaimer in the
cam 0:0453a0a7e500 13 * documentation and/or other materials provided with the distribution.
cam 0:0453a0a7e500 14 * 3. The name of the author may not be used to endorse or promote products
cam 0:0453a0a7e500 15 * derived from this software without specific prior written permission.
cam 0:0453a0a7e500 16 *
cam 0:0453a0a7e500 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
cam 0:0453a0a7e500 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
cam 0:0453a0a7e500 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
cam 0:0453a0a7e500 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
cam 0:0453a0a7e500 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
cam 0:0453a0a7e500 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
cam 0:0453a0a7e500 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
cam 0:0453a0a7e500 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
cam 0:0453a0a7e500 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
cam 0:0453a0a7e500 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
cam 0:0453a0a7e500 27 *
cam 0:0453a0a7e500 28 * File: $Id: mbcrc.c,v 1.7 2007/02/18 23:50:27 wolti Exp $
cam 0:0453a0a7e500 29 */
cam 0:0453a0a7e500 30
cam 0:0453a0a7e500 31 /* ----------------------- Platform includes --------------------------------*/
cam 0:0453a0a7e500 32 #include "port.h"
cam 0:0453a0a7e500 33
cam 0:0453a0a7e500 34 static const UCHAR aucCRCHi[] = {
cam 0:0453a0a7e500 35 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 36 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
cam 0:0453a0a7e500 37 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 38 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 39 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 40 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
cam 0:0453a0a7e500 41 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
cam 0:0453a0a7e500 42 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
cam 0:0453a0a7e500 43 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 44 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
cam 0:0453a0a7e500 45 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 46 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 47 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 48 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 49 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 50 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 51 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 52 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
cam 0:0453a0a7e500 53 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 54 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 55 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
cam 0:0453a0a7e500 56 0x00, 0xC1, 0x81, 0x40
cam 0:0453a0a7e500 57 };
cam 0:0453a0a7e500 58
cam 0:0453a0a7e500 59 static const UCHAR aucCRCLo[] = {
cam 0:0453a0a7e500 60 0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7,
cam 0:0453a0a7e500 61 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E,
cam 0:0453a0a7e500 62 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9,
cam 0:0453a0a7e500 63 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC,
cam 0:0453a0a7e500 64 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
cam 0:0453a0a7e500 65 0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32,
cam 0:0453a0a7e500 66 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D,
cam 0:0453a0a7e500 67 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38,
cam 0:0453a0a7e500 68 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF,
cam 0:0453a0a7e500 69 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
cam 0:0453a0a7e500 70 0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1,
cam 0:0453a0a7e500 71 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4,
cam 0:0453a0a7e500 72 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB,
cam 0:0453a0a7e500 73 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA,
cam 0:0453a0a7e500 74 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
cam 0:0453a0a7e500 75 0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0,
cam 0:0453a0a7e500 76 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97,
cam 0:0453a0a7e500 77 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E,
cam 0:0453a0a7e500 78 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89,
cam 0:0453a0a7e500 79 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
cam 0:0453a0a7e500 80 0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83,
cam 0:0453a0a7e500 81 0x41, 0x81, 0x80, 0x40
cam 0:0453a0a7e500 82 };
cam 0:0453a0a7e500 83
cam 0:0453a0a7e500 84 USHORT
cam 0:0453a0a7e500 85 usMBCRC16( UCHAR * pucFrame, USHORT usLen )
cam 0:0453a0a7e500 86 {
cam 0:0453a0a7e500 87 UCHAR ucCRCHi = 0xFF;
cam 0:0453a0a7e500 88 UCHAR ucCRCLo = 0xFF;
cam 0:0453a0a7e500 89 int iIndex;
cam 0:0453a0a7e500 90
cam 0:0453a0a7e500 91 while( usLen-- )
cam 0:0453a0a7e500 92 {
cam 0:0453a0a7e500 93 iIndex = ucCRCLo ^ *( pucFrame++ );
cam 0:0453a0a7e500 94 ucCRCLo = ( UCHAR )( ucCRCHi ^ aucCRCHi[iIndex] );
cam 0:0453a0a7e500 95 ucCRCHi = aucCRCLo[iIndex];
cam 0:0453a0a7e500 96 }
cam 0:0453a0a7e500 97 return ( USHORT )( ucCRCHi << 8 | ucCRCLo );
cam 0:0453a0a7e500 98 }