GCBASIC documentation
LCD Overview

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.

For more help, see LCD_IO 0, LCD_IO 1, LCD_IO 2 LCD_IO 2_74xx164, LCD_IO 2_74xx174, LCD_IO 4, LCD_IO 8, LCD_IO 10, LCD_IO 12