A better set of instructions will have to come later.

• VBA Excel(2003)is used to create a graphical user interface (GUI )to simulate the TFT screen.
• From the VBA tool box. Buttons, Labels, and Text boxes are pulled into a frame that represents the screen.
• Click “Compile” to save the basic data into a hex file.
• Click “Transpose”. The data is automatically added into an “Arduino burn EEPROM template” sketch that is stored within Excel itself.
• The template is then automatically saved and launched.
• When you run the burn sketch the data is stored in the Uno's EEPROM space. 1024 bytes max. The example uses 387 bytes of EEPROM space.
• Load the final CntrlPannel Slave sketch. Data stored in the EEPROM doesn't change even if a new sketch is loaded.
• The size and memory used in this file never changes.
• Load the Master sketch on another Arduino to create the I2C slave, master relation.

What do you get :

• Labels:
  • They are static. Their values can not be changed.
  • The more words used. The more EEPROM space used.
• Text boxes:
  • They are dynamic.
  • Numbers or Text can be sent from the I2C master using the Text Box object reference number.
  • Initial text is stored in the EEPROM.
• Buttons:
  • Buttons are animated. (they appear to move when pressed)
  • When pressed their object reference number is registered.
  • The I2C master will constantly poll looking if a number is registered