LCD_VARIANT

Using LCD_VARIANT:

Some LCDs are non-standard.   The non-standard LCDs may have a different memory architecture where the memory is non-consective or different delay timing is required for the LCD IC.   Use LCD_VARIANT to change the operating behaviour of GCBASIC with respect to LCD operations.   If a LCD_VARIANT adaption has been created in the library then the non-standard LCD can be supported.

#DEFINE LCD_VARIANT 1601a

Use #define LCD_VARIANT 1601a to use this sub variant. Requires a LCD_IO then this sub type modifier.   This variant has a non consective memory as shown in the diagram below.

graphic

Example:

This example shows how to use the LCD_VARIANT constant.   This example shows the use of software I2C - any LCD mode can be used not just software I2C.   

    #chip tiny84,1

    'Set up LCD
    #define LCD_IO 10
    #define LCD_VARIANT 1601a
    #define LCD_WIDTH 16

    'You may need to use SLOW or MEDIUM if your LCD is a slower device.
    #define LCD_SPEED FAST

    ' ----- Define Hardware settings
    ' Define I2C settings - CHANGE PORTS FOR YOUR NEEDS
    #define LCD_I2C_Address 0x0E
    #define I2C_MODE Master
    #define I2C_DATA PORTA.4
    #define I2C_CLOCK PORTA.5
    #define I2C_DISABLE_INTERRUPTS ON

    'You may need to invert these states. Dependent of LCD I2C adapter.
    #define LCD_Backlight_On_State  1
    #define LCD_Backlight_Off_State 0

    ; ----- Main body of program commences here.
    Locate 0,0
    PRINT "GCBASIC"


    Do
    Loop

For code examples see I2C Variants 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

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