Data Provider

Classes
interface	MbusDataTableInterface
	This class defines the interface between a Modbus slave Server Engine and your application. More...

Detailed Description

A Data Provider acts as an agent between your Application and the Server Engine.

After instantiating a Server Engine class of any protocol flavour, you have to associate it with a Data Provider by calling addDataTable and passing a pointer to the Data Provider object.

MbusRtuSlaveProtocol mbusProtocol;
mbusProtocol.addDataTable(1, &dataTable);

To create an application specific Data Provider derive a new class from MbusDataTableInterface and override the required data access methods.

A minimal Data Provider which realises a Modbus slave with read access to holding registers would be:

class MyDataProvider: public MbusDataTableInterface
{
  public:

   MyDataProvider() {}

   // Override readHoldingRegistersTable method:
   int readHoldingRegistersTable(int startRef, short regArr[], int refCnt)
   {
      ... your application specific implementation
   }
};