Adafruit Backpack Liquid Crystal Display (LCD) - SPI

File:TArduinoLCDAdafruitBackpackSPI.png

Summary

Adafruit Backpack LCD module with SPI interface. Provides text display with support for cursor control, scrolling, backlight, and custom characters.

Description

The Adafruit Backpack LCD (SPI) converts a standard character LCD into an SPI device for simplified wiring. It supports cursor visibility, scrolling, adjustable backlight, and left-to-right or right-to-left text rendering. The driver allows defining and using custom characters and multiple field elements. Typical configurations include 16×2 character LCDs.

Diagram:

Categories

• File:TArduinoDisplayCategory.png Category Display – Screen and display components.
• File:TArduinoSPI.png Category SPI – SPI communication devices.
• File:TArduinoAdafruitCategory.png Category Adafruit – Adafruit modules.

Properties

• 10 Pixels Height – Boolean option for modules supporting 10-pixel-high characters.
• Auto Scroll – Enables automatic text scrolling (boolean).
• Backlight – Enables or disables the LCD backlight (boolean).
• Backlight Positive – Defines backlight polarity (boolean).
• Blink – Enables cursor blinking (boolean).
• Columns – Number of text columns (default: 16).
• Elements – Configurable elements for display:

 * Text Field  
 * Define Custom Character  
 * Custom Character Field  
 * Integer Field  
 * Unsigned Field  
 * Digital Field  
 * Analog Field  

• Enabled – Enables or disables the LCD module.
• Right To Left – Boolean flag for text direction.
• Rows – Number of text rows (default: 2).
• Show Cursor – Boolean flag to display or hide the cursor.
• SPISpeed – SPI communication speed (default: 8000000).

Pins

Input Pins

• In (text) – Text input for display rendering.
• Scroll Left – Clock input to scroll text left.
• Scroll Right – Clock input to scroll text right.
• Clear – Clock input to clear the display.
• Home – Clock input to return cursor to home position.

Output Pins

• Out (SPI) – SPI communication output to the LCD module.
• Reset – Digital reset control, if applicable.
• Chip Select – Digital chip select for SPI device.