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Display Controller Solutions: Graphical Displays
FREE Microchip Graphics Display Designer
The Microchip Graphics Display
Designer (GDD) is a visual
design tool that provides
customers with a quick and
easy way of creating Graphical
User Interface (GUI) screens for
graphical interface applications
on Microchip MCUs.
Color Examples
Microchip offers varying levels of solutions to drive
everything from simple monochrome LCDs to full color
WVGA user interfaces.
Graphics support includes the following approaches:
■ PIC24F “DA” integrated graphics controller
■ PIC32 controllerless graphics
■ Support for PIC MCU with external graphics controllers
The silicon offering is complemented with powerful, free
and easy to use graphics library, display designer GUI
and hardware development kits with flexible interface to
various glass sizes.
It provides the following advantages to the developers:
■ Simpli?es coding for the GUI screens with an ability to
draw, resize and delete screen objects
■ Eliminates the need to manually calculate the x- and y-
coordinates for on-screen object placements
■ Generates output source ?les
■ Ability to import various graphical resources, including
custom fonts and bitmap images
Supported Screen Sizes and Colors
Microchip graphics solutions support various screen sizes
and colors ranging from small monochrome OLED displays
up to WVGA displays with vivid color. The table below
shows the bits per pixel required to represent color.
Display Color Depth
Representation (bits per pixel)
FREE Microchip Graphics Library
Mono
Black and White
1
Grayscale
The Microchip Graphics
Library is highly modular
and is optimized for
Microchip’s 16- and 32-bit
microcontrollers. It is easy
to use and has an open
documented interface for driver or controller support. The
library supports the following features:
■ Pre-made graphics objects
■ Multiple fonts and languages
■ User interface for mTouch? sensing
■ Includes buttons, charts, check boxes, scroll bars, list
boxes, images and basic animation
Display Resolution
Typical Sizes
4 shades 2
16 shades 4
256 colors 8
Color 65K colors 16
16 million colors 24
As the color depth and display resolution increase, the
frame buffer grows. Depending on the size, the frame
buffer can be stored in the microcontroller RAM, in external
SRAM or integrated into an external graphics controller.
The table below shows examples of the frame buffer sizes
required for some popular resolution and color depths.
■ PIC24 “DA” family supports up to 96 KB on chip
■ PIC32 MCUs support up to 128 KB on chip
■ External SRAM can be used for larger frame buffers
■ For advanced graphics, external graphics controllers
have additional frame buffer storage
Color Depth/
Memory Requirement in (bytes)
1 bpp
(Mono)
2 bpp
(4 shades)
4 bpp
(16 shades)
8 bpp
(256 colors)
16 bpp
(65K colors)
WVGA
VGA
WQVGA
QVGA
Common for OLED
800?×?480
640?×?480
480?×?272
320?×?240
128?×?64
7"
5.7"
4.3"
3.2"
1"–2.7"
48,000
38,400
16,320
9,600
1,024
96,000
76,800
32,640
19,200
2,048
192,000
153,600
65,280
38,400
4,096
384,000
307,200
130,560
76,800
8,192
768,000
614,400
261,120
153,600
16,384
Internal PIC? MCU SRAM
External SRAM
8
Microchip Human Interface Solutions
www.microchip.com/graphics
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