Added Serial number descriptor
Allocate 16 digit serial descriptor buffer
Assign the serial descriptor to 3
Specified iSerial for DeviceDescriptor
Implemeted unique serial number
Included cyu3utils.h to use CyU3PReadDeviceRegisters
Relocated hexdigit[] to file level scope
Generated unique ID from the Die ID#
Added I2C initialization
Included I2C header
Added I2C initialization function
Invoked I2C initialization from application thread
Enabled I2C module