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6-4
Using Using Graphics Tools
Programmer’s Manual
6.2.2
Screen Resolution
LCD display screen resolution is the number of pixels that are available on the
hardware. This is normally a fixed figure for each LCD hardware panel. The touch
panel resolution must be equal to or greater than the LCD resolution or the pen
cannot point at every pixel of the LCD display.
6.3
Sample LCD Display Screen
The following two figures show example systems used by the M68328ADS
hardware platform.
The LCD Display Screen area has two sizes, 320 pixels wide by 240 pixels high
and 320 pixels wide by 200 pixels high. The touch panel resolution is 1024x1024.
Figure 6-2 320x240 LCD Panel with a larger touch panel
320 pixels
240
pixels
Pen Input Area
Graphics & Text
X pixels
hardware cursor control provided by PPSM.
pixels
For
Panning Screen
Display Origin (0,0)
Input Origin (0,0)
(319, 239)
Display coordinate
LCD Display Screen
Panning Screen Origin (0,0)
340 pixels
Input coordinate (1023,1023)
Personal Portable System Manager
Programmer’s Manual
6-1
Chapter 6
Using Graphics Tools
PPSM supports LCD modules with capabilities such as multiple grey levels,
hardware cursor, hardware panning and software configurable display size.
The Graphics Tools enable applications to:
draw lines and shapes (e.g. dotted line, circle, etc.)
display and manipulate bitmap images
swap bitmap images
control and restore bitmap images
control hardware cursor
set grey levels
get information about the LCD display screen and panning screen.
change the panning screen size
direct all drawing effect to memory area apart from panning screen
area
hardware cursor in inverse and/or blinking mode
allocate memory for panning screen
set dot width in pixels for drawing dot, line, rectangle, circle, ellipse,
arc and vector
set pattern fill mode for drawing rectangle, circle, ellipse and arc
draw vector by connecting consecutive points in a list
This chapter will describe the display screen format, graphics routines and
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.