Remote-processing RPC-2350 Bedienungsanleitung PDF herunterladen (Seite 67)

GRAPHIC DISPLAY PORT CHAPTER 15

15-6

Figure 15-3

LOAD AND SAVE SCREENS

Two com mands load and save screen graphics.

DISPLAY LOAD (x1,y1),(x2,y2),seg,address

DISPLAY SAVE (x1,y1),(x2,y2),seg,address

The first syntax, DISPLAY LOAD, transfer s graphic

information from RAM or F lash to the screen. The

second syntax, DISPLAY SAVE, transfers graphic from

the display to RAM only.

address range is &0 to &FFFF.

Use DISPLAY L OAD to bring up pre-generated graphic

icons (such as buttons), prompts, company logos, or

process symbols. When used in conjunc tion with

DISPLA Y SAVE , it can be used to recall a graph

DISPLA Y LOA D does not save any small text info.

Param eters (x1,y1),(x2, y2) specify the rectangular area

on the display where the graphic will be placed.

Graphic coordinates correspond to those used to draw

lines, pixels, and fill areas.

The seg parameter specifies what m emory segment to

save or load.

Memory type & size Range of seg parameter

128K RAM 1

512K RAM 1-7

128K Flash 8 -9

512K Flash 8-15

DISPLA Y SAVE works only when seg is to RAM. To

save a screen to flash, you must use SAVE.

You will have to calculate the address, especially if you

have more than one screen.

Calculating graphic memory requirem ents

Use (x1,y1),(x2, y2) parameters in DISPLAY L OAD and

SAVE to calculate the number of bytes needed.

bytes = ((X2 - X1) / 8) * (Y2-Y1)

The equation above assume X2 > X1 and Y2 > Y1.

Round UP the result of (X2-X1)/8 if it is a fraction. See

the following example.

Suppose you want to save screen data from (0,120) to

(203,239).

bytes = ((203 - 0) / 8) * (239 - 120)

bytes = 25.375 * 119

(Round UP 25. 375 to 26)

bytes = 26 * 119

bytes = 3094

To save multiple screens, assign each screen a number

(assuming they are all the same size). When saving,

multiply the screen number by the number of

bytes/screen. This becomes the address.

Making and saving custom graphics

A program in the applications disk, BMP-GPH.EXE,

translates a .BMP file into a hex file readable by the

RPC-2350.

BMP-GP H converts a black and white, single layer (no

transparent background color) BMP file generated by

any number of PC graphics programs. Width and height

attributes of the BMP graphic are in pixels. Limits are

320 pixels for width and 24 0 pixels for height.

Some BMP graphics are provided for your use . T hese

are in the GRAPHICS directory of the application disk.

Graphics are transferred to the RPC-2350 using the

HEXLOAD.BAS program, located in the FONT

directory. Every download saves the graphic to the

same location in RAM (segment 1, starting address 0).

You must move the graphic to a predetermined location

either in Flash or RAM.

Use the table at the end of this section to help map your

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