How to Write a Serial Protocol Module: Tutorial

This topic gives a summary of the APIs that must be implemented for a new Serial Protocol Module.

1. 
   Create a new DLL project with a .csy extension and a UID 2 of 0x10000049 .
2. 
   Create a class which derives from the CPort class. This class implements the Serial service provider. Requests are delivered by the Serial Communications Server to the CPort class using pure virtual functions. These functions include:
   1. CPort::StartRead() , which must be implemented to handle client requests to read data from the port
      CPort::IPCWrite() can be used to send the data to the client
   2. CPort::StartWrite() , which must be implemented to handle client requests to write data to the port
      CPort::IPCRead() can be used to get the data from the client
3. 
   Create a class which derives from the CSerial class. This class implements the Serial protocol factory. The CSerial::NewPortL() function must return a new instance of the Serial service provider. The CSerial::Info() function must return a complete TSerialInfo record with information for the Serial Protocol Module.