GCBASIC documentation
Multiple I2C Adapters (LCD_IO 12)

Using connection mode 16:

Using this LCD IO methof the LCD is controlled via the Microchip PIC16LF72 SPI expander.

To use mode 16 you must define the SPI ports as shown below.

Relevant Constants:

These constants are used to control settings for the LCD routines included with GCBASIC.   To set them, place a line in the main program file that uses #define to assign a value to the particular constant.

When using this mode only three constants are mandated - all others can be ignored.

Connectivity

The connectivity is shown below.  The microcontroller connections are as shown below.  This is an example using the Microchip PICDEM 4 2003 board.

    //Constants - LCD connectivity type;
            #DEFINE LCD_IO 16

            //PIN MAPPINGS FOR PIC16LF72 LCD IO SPI EXPANDER

                // CONSTANT IS MANDATED - DATA LINE
                #DEFINE LCD_SPI_DO          PORTB.2

                // CONSTANT IS MANDATED - CLOCK LINE
                #DEFINE LCD_SPI_SCK         PORTB.5

    //! Main program

    Print "GCBASIC Rocks"
    End

For code examples see LCD Solutions.

See the separate sections of the Help file for the specifics of each Connection Mode.

See Also: