LCD_IO 12

Using connection mode 12:

The LCD is controlled via I2C. A type 12 is the Ywmjkdz I2C adapter with potentiometer variable resistor) bent over top of chip. To use mode 12 you must define the I2C ports as normal in your GCB code. Then, define the LCD type, set the I2C_address of the LCD adapter and the LCD speed, if required.

Relevant Constants:

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

When using 2-bit mode only three constants must be set - all others can be ignored.

Constant Name Controls Value

LCD_IO

I/O mode

12

LCD_I2C_Address_1

Address of I2C adapter

Default 0x4E
could also be 0x27

LCD_I2C_Address_2

Address of I2C adapter

Not set

LCD_I2C_Address_2

Address of I2C adapter

Not set

LCD_I2C_Address_2

Address of I2C adapter

Not set

To set the correct address see the picture below:

graphic

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 10