ModbusMaster Object Instantiation/Initialization

Functions
	ModbusMaster::ModbusMaster ()
	Constructor. More...
void	ModbusMaster::begin (uint8_t, Stream &serial)
	Initialize class object. More...

Detailed Description

Function Documentation

ModbusMaster()

ModbusMaster::ModbusMaster

(

void

)

Constructor.

Creates class object; initialize it using ModbusMaster::begin().

{
  _idle = 0;
  _preTransmission = 0;
  _postTransmission = 0;
}

begin()

void ModbusMaster::begin	(	uint8_t	slave,
		Stream &	serial
	)

Initialize class object.

Assigns the Modbus slave ID and serial port. Call once class has been instantiated, typically within setup().

Parameters

slave	Modbus slave ID (1..255)
&serial	reference to serial port object (Serial, Serial1, ... Serial3)

Examples:

examples/Basic/Basic.pde, examples/PhoenixContact_nanoLC/PhoenixContact_nanoLC.pde, and examples/RS485_HalfDuplex/RS485_HalfDuplex.ino.

{
//  txBuffer = (uint16_t*) calloc(ku8MaxBufferSize, sizeof(uint16_t));
  _u8MBSlave = slave;
  _serial = &serial;
  _u8TransmitBufferIndex = 0;
  u16TransmitBufferLength = 0;
  
#if __MODBUSMASTER_DEBUG__
  pinMode(__MODBUSMASTER_DEBUG_PIN_A__, OUTPUT);
  pinMode(__MODBUSMASTER_DEBUG_PIN_B__, OUTPUT);
#endif
}