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.

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

Committer:
danielmckinnell
Date:
Tue Aug 04 04:42:52 2020 +0000
Revision:
4:7621103c5a40
Parent:
1:e2f569d323c9 
RTU Serial updates

Who changed what in which revision?

UserRevisionLine numberNew contents of line
cam 0:0453a0a7e500 1 /*
cam 0:0453a0a7e500 2 * FreeModbus Libary: BARE Port
cam 0:0453a0a7e500 3 * Copyright (C) 2006 Christian Walter <wolti@sil.at>
cam 0:0453a0a7e500 4 *
cam 0:0453a0a7e500 5 * This library is free software; you can redistribute it and/or
cam 0:0453a0a7e500 6 * modify it under the terms of the GNU Lesser General Public
cam 0:0453a0a7e500 7 * License as published by the Free Software Foundation; either
cam 0:0453a0a7e500 8 * version 2.1 of the License, or (at your option) any later version.
cam 0:0453a0a7e500 9 *
cam 0:0453a0a7e500 10 * This library is distributed in the hope that it will be useful,
cam 0:0453a0a7e500 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
cam 0:0453a0a7e500 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
cam 0:0453a0a7e500 13 * Lesser General Public License for more details.
cam 0:0453a0a7e500 14 *
cam 0:0453a0a7e500 15 * You should have received a copy of the GNU Lesser General Public
cam 0:0453a0a7e500 16 * License along with this library; if not, write to the Free Software
cam 0:0453a0a7e500 17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
cam 0:0453a0a7e500 18 *
cam 0:0453a0a7e500 19 * File: $Id: portserial.c,v 1.1 2006/08/22 21:35:13 wolti Exp $
cam 0:0453a0a7e500 20 */
cam 0:0453a0a7e500 21
cam 0:0453a0a7e500 22 /* ----------------------- System includes ----------------------------------*/
cam 0:0453a0a7e500 23 #include "mbed.h" // Cam
danielmckinnell 1:e2f569d323c9 24 #include "RawSerial.h"
cam 0:0453a0a7e500 25 /* ----------------------- Platform includes --------------------------------*/
cam 0:0453a0a7e500 26 #include "port.h"
cam 0:0453a0a7e500 27
cam 0:0453a0a7e500 28 /* ----------------------- Modbus includes ----------------------------------*/
cam 0:0453a0a7e500 29 #include "mb.h"
cam 0:0453a0a7e500 30 #include "mbport.h"
cam 0:0453a0a7e500 31
danielmckinnell 1:e2f569d323c9 32 // Dan - Allow serial pins to be configurable in json config
danielmckinnell 1:e2f569d323c9 33 #ifndef MBED_CONF_APP_MODBUS_SERIAL_TX
danielmckinnell 1:e2f569d323c9 34 #define MBED_CONF_APP_MODBUS_SERIAL_TX USBTX
danielmckinnell 1:e2f569d323c9 35 #endif
danielmckinnell 1:e2f569d323c9 36
danielmckinnell 1:e2f569d323c9 37 #ifndef MBED_CONF_APP_MODBUS_SERIAL_RX
danielmckinnell 1:e2f569d323c9 38 #define MBED_CONF_APP_MODBUS_SERIAL_RX USBRX
danielmckinnell 1:e2f569d323c9 39 #endif
cam 0:0453a0a7e500 40
cam 0:0453a0a7e500 41 /* ----------------------- static functions ---------------------------------*/
danielmckinnell 4:7621103c5a40 42
danielmckinnell 4:7621103c5a40 43 static void prvvUARTTxISR( void );
cam 0:0453a0a7e500 44 static void prvvUARTRxISR( void );
cam 0:0453a0a7e500 45
cam 0:0453a0a7e500 46 /* ----------------------- System Variables ---------------------------------*/
cam 0:0453a0a7e500 47
danielmckinnell 4:7621103c5a40 48 static RawSerial* modbus_serial;
cam 0:0453a0a7e500 49
cam 0:0453a0a7e500 50 /* ----------------------- Start implementation -----------------------------*/
danielmckinnell 4:7621103c5a40 51
danielmckinnell 4:7621103c5a40 52 void xMBSetSerial(RawSerial* s){
danielmckinnell 4:7621103c5a40 53 modbus_serial = s;
cam 0:0453a0a7e500 54 }
cam 0:0453a0a7e500 55
cam 0:0453a0a7e500 56 void
cam 0:0453a0a7e500 57 vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable )
cam 0:0453a0a7e500 58 {
danielmckinnell 4:7621103c5a40 59 if(xRxEnable){
danielmckinnell 4:7621103c5a40 60 modbus_serial->attach(&prvvUARTRxISR, RawSerial::RxIrq); // Dan
danielmckinnell 4:7621103c5a40 61 }else{
danielmckinnell 4:7621103c5a40 62 modbus_serial->attach(nullptr, RawSerial::RxIrq);
danielmckinnell 4:7621103c5a40 63 }
danielmckinnell 4:7621103c5a40 64
danielmckinnell 4:7621103c5a40 65 // if(xTxEnable){
danielmckinnell 4:7621103c5a40 66 // modbus_serial->attach(&prvvUARTTxISR, RawSerial::TxIrq); // Dan
danielmckinnell 4:7621103c5a40 67 // }else{
danielmckinnell 4:7621103c5a40 68 // modbus_serial->attach(nullptr, RawSerial::TxIrq);
danielmckinnell 4:7621103c5a40 69 // }
cam 0:0453a0a7e500 70 }
cam 0:0453a0a7e500 71
danielmckinnell 4:7621103c5a40 72
danielmckinnell 4:7621103c5a40 73
cam 0:0453a0a7e500 74 BOOL
cam 0:0453a0a7e500 75 xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity )
cam 0:0453a0a7e500 76 {
danielmckinnell 4:7621103c5a40 77 SerialBase::Parity p = eParity == MB_PAR_NONE ? SerialBase::None :
danielmckinnell 4:7621103c5a40 78 eParity == MB_PAR_EVEN ? SerialBase::Even : SerialBase::Odd;
danielmckinnell 4:7621103c5a40 79
danielmckinnell 4:7621103c5a40 80 modbus_serial->baud(ulBaudRate);
danielmckinnell 4:7621103c5a40 81 modbus_serial->format(ucDataBits, p);
danielmckinnell 4:7621103c5a40 82
cam 0:0453a0a7e500 83 return TRUE;
cam 0:0453a0a7e500 84 }
cam 0:0453a0a7e500 85
cam 0:0453a0a7e500 86 BOOL
cam 0:0453a0a7e500 87 xMBPortSerialPutByte( CHAR ucByte )
cam 0:0453a0a7e500 88 {
cam 0:0453a0a7e500 89 /* Put a byte in the UARTs transmit buffer. This function is called
cam 0:0453a0a7e500 90 * by the protocol stack if pxMBFrameCBTransmitterEmpty( ) has been
cam 0:0453a0a7e500 91 * called. */
danielmckinnell 4:7621103c5a40 92 modbus_serial->putc( ucByte);
cam 0:0453a0a7e500 93 return TRUE;
cam 0:0453a0a7e500 94 }
cam 0:0453a0a7e500 95
cam 0:0453a0a7e500 96 BOOL
cam 0:0453a0a7e500 97 xMBPortSerialGetByte( CHAR * pucByte )
cam 0:0453a0a7e500 98 {
cam 0:0453a0a7e500 99 /* Return the byte in the UARTs receive buffer. This function is called
cam 0:0453a0a7e500 100 * by the protocol stack after pxMBFrameCBByteReceived( ) has been called.
cam 0:0453a0a7e500 101 */
danielmckinnell 4:7621103c5a40 102 *pucByte = modbus_serial->getc();
cam 0:0453a0a7e500 103 return TRUE;
cam 0:0453a0a7e500 104 }
cam 0:0453a0a7e500 105
danielmckinnell 4:7621103c5a40 106
danielmckinnell 4:7621103c5a40 107 static void prvvUARTTxISR( void )
cam 0:0453a0a7e500 108 {
cam 0:0453a0a7e500 109 pxMBFrameCBTransmitterEmpty( );
cam 0:0453a0a7e500 110 }
cam 0:0453a0a7e500 111
cam 0:0453a0a7e500 112 /* Create an interrupt handler for the receive interrupt for your target
cam 0:0453a0a7e500 113 * processor. This function should then call pxMBFrameCBByteReceived( ). The
cam 0:0453a0a7e500 114 * protocol stack will then call xMBPortSerialGetByte( ) to retrieve the
cam 0:0453a0a7e500 115 * character.
cam 0:0453a0a7e500 116 */
cam 0:0453a0a7e500 117 static void prvvUARTRxISR( void )
cam 0:0453a0a7e500 118 {
cam 0:0453a0a7e500 119 pxMBFrameCBByteReceived( );
danielmckinnell 4:7621103c5a40 120 }