Files
LoRaWAN-Modbus-Gateway/libraries/ArduinoModbus/src/ModbusRTUServer.cpp
2022-12-15 15:26:57 +01:00

74 lines
1.8 KiB
C++

/*
This file is part of the ArduinoModbus library.
Copyright (c) 2018 Arduino SA. All rights reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <errno.h>
extern "C" {
#include "libmodbus/modbus.h"
#include "libmodbus/modbus-rtu.h"
}
#include "ModbusRTUServer.h"
ModbusRTUServerClass::ModbusRTUServerClass()
{
}
ModbusRTUServerClass::ModbusRTUServerClass(RS485Class& rs485) : _rs485(&rs485)
{
}
ModbusRTUServerClass::~ModbusRTUServerClass()
{
}
int ModbusRTUServerClass::begin(int id, unsigned long baudrate, uint16_t config)
{
modbus_t* mb = modbus_new_rtu(_rs485, baudrate, config);
if (!ModbusServer::begin(mb, id)) {
return 0;
}
modbus_connect(mb);
return 1;
}
int ModbusRTUServerClass::begin(RS485Class& rs485, int id, unsigned long baudrate, uint16_t config)
{
_rs485 = &rs485;
return begin(id, baudrate, config);
}
int ModbusRTUServerClass::poll()
{
uint8_t request[MODBUS_RTU_MAX_ADU_LENGTH];
int requestLength = modbus_receive(_mb, request);
if (requestLength > 0) {
modbus_reply(_mb, request, requestLength, &_mbMapping);
return 1;
}
return 0;
}
ModbusRTUServerClass ModbusRTUServer;