The 'general' code set sends commands that rely on the following
1-Wire Net link-level functions.

The following is a description of the API needed to port this
code set to any platform.  See the 'TODO.C' and 'TODOSES.C' files 
in the directory '\source\lib\general'.

Required API that must be implemented for the 'general' code
set to function:

   MLanTouchReset   
         Reset all devices on MicroLAN(1-Wire Net).
         Result of function indicates if any devices
         were detected.

   MLanTouchBit     
         Send and receive 1 bit from MicroLAN(1-Wire Net)

API that can be generated from the required API:

   MLanTouchByte    
         Send and receive 8 bits from MicroLAN(1-Wire Net).
         This can be contructed from 8 calls to MLanTouchBit
         but it may be for efficient to create this API.

   MLanWriteByte    
         Send 8 bits to MicroLAN(1-Wire Net) and verify
         the echo received matches.  
         (constructed from MLanTouchByte)

   MLanReadByte     
         Receive 8 bits from MicroLAN(1-Wire Net) by sending
         all 1's (0xFF) and letting the slave change the echo. 
         (constructed from MLanTouchByte)

Optional API that may be needed for the platform or for a specific
application.

   MLanSpeed        
         Set the communication speed MicroLAN(1-Wire Net) to
         Normal (16K bits) or Overdrive (142K bits).
         All 1-Wire devices at least support the Normal 
         communication rate.  This API need only be implimented
         if Overdrive communication rate is desired.

   MLanLevel        
         Set the MicroLAN(1-Wire Net) line level to Normal 
         (5V weak pullup), Power Delivery (5V strong pullup), or 
         Program Level (12V EPROM programming level).
         Power delivery only required by some 1-Wire devices
         such as the DS1820, DS2450, and DS1954.
         Programming level only required to write EPROM based
         memory 1-Wire devices.

   MLanProgramPulse 
         Timed programming pulse for EPROM 1-Wire device
         writing.  Can be constructed from MLanLevel.  
         Only required to write EPROM based memory 1-Wire devices.

   msGettick
         Return an increment millisecond counter.  This is used in 
         several of the sample applications. 

   msDelay
         Delay at least the specified number of milliseconds.  This
         is used in several of the sample applications.