GCBASIC documentation
LCD Overview

Using connection mode 10:

The LCD is controlled via I2C of a type 10 LCD 12C adapter. Use LCD_IO 10 for the YwRobot LCD1602 IIC V1 or the Sainsmart LCD_PIC I2C adapter. To use mode 10 you must define the I2C ports as normal in your GCBASIC code. Then, define the LCD type, set the I2C_address of the LCD adapter and the LCD speed, if required. Finally, set the backlight control, if required.

Relevant Constants:

These constants are used to control settings for the Liquid Crystal Display 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.

Example Usage

An example for using two I2C-LCD. This example can be extended to support more than two or more ( up to eight ) I2C-LCD(s).

This example shows you can have up to eight LCD on the I2C-Bus (8 Addresses 0x40 to 0x4E of the PCF8574-Adaptor).

    // Set up I2C-LCD
    #DEFINE LCD_IO 10

    /*  Set LCD_IO to 10 for the YwRobot LCD1602 IIC V1 or the Sainsmart LCD_PIC I2C adapter
    Set LCD_IO to 12 for the Ywmjkdz I2C adapter with pot bent over top of chip */

    #DEFINE LCD_I2C_ADDRESS_1 0x4E ' prepare the first LCD on Address 0x4E
    #DEFINE LCD_I2C_ADDRESS_6 0x44 ' prepare the second LCD on Address 0x44

    // To switch between the two LCD can be done with

    LCD_I2C_ADDRESS_Current = LCD_I2C_ADDRESS_6 // now the second I2C-LCD is active

    // or

    LCD_I2C_ADDRESS_Current = LCD_I2C_ADDRESS_1 //  now the first I2C-LCD is active

For code examples see I2C 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 12