Remote-processing RPC-2350 Uživatelský manuál stáhnout pdf (Strana 62)

CHAPTER 15 GRAPHIC DISPLAY PORT

15-1

Figure 15-1 LCD and EL connector location

CHAPTER SYNOPSIS

GRAPHIC DISPLAY PORT CHAP TER 15

 General display information

 Connect a display

 Display modes

 Printing text

 Make and load fonts

 Making, saving and loading screens

 Drawing points and lines

 ancillary screen control

 Load and save graphic screens

 Touch screen positioning

 Cable and wiring diagrams

 Command summary

 Application programs

DISPLAY INFORMATION

The RPC -2350 initializes the display controller for the

following type on power up:

Optrex DMF50174 320 x 240 pixel LCD

Planar EL320.240.36 320 x 240 pixel EL

The LCD plugs into J9. The EL display plugs into J13.

There are 3 character sizes available. Default character

set is 5 x 7 pixels. This set displays 30 rows of 40

characters / line. Most American ASCII characters are

displayed. The ‘\’ char acter is the yen symbol. ASC II

values 126 and 127 are displayed as 6 and 7

respectively.

Medium size is 10 x 16 pixels (0. 175" height). All

printable ASCII characters are available. This set

displays a maximum of 15 rows x 32 characters wide.

The largest size is 32 x 48 p ixels (0. 5" height). A ll

ASCII characters ar e available. T his set displays a

maximum of 6 rows x 10 characters wide.

Medium and large char acters are treated as graphics.

They can be displayed in normal or reverse (light

border, black character ) mode. Fonts are stor ed in Flash

EPROM . You may change fonts as desired. See

"Changing and loading fonts" later.

Small character cursor position starts in the screen’s

upper left corner. Row, Column coordinates start at 0,0

and end at 45,29.

The controller is progra mmed for two planes. The first

plane is small characters only. The second plane is

larger characters and graphics. Each plane can be

independently turned on or off or flashed.

Display sn ow or spa rkle

Snow, or sparkle, were defined in the PC world as

extraneous flashes of light on the screen. Sparkle

appeared during updates on PC’s. A similar

phenomenon can manifest itself on the RPC-2350G.

Instead of flashes of light, there are black or grey bars

randomly running around an LCD screen. These are

most noticeable in reverse character display mode.

Flashes of light are even more noticeable on EL

displays.

Sparkle is reduced by writing to controller memory

during the “update” time. Unfor tunately this tends to

slow display updates considerably. Sparkle affects the

RPC-2350G only when drawing medium and large size

characters. It is especially noticeable when printing in

reverse.

Update time can be critical. Typical times for printing 5

large character s is about 0. 1 second with sparkle

suppression. Without sparkle, the same characters are

printed in about 0.020 seconds. Medium size characters

take 2 times longer to print with sparkle suppression than

without.

Default C AMBASIC mode is m inimum sparkle. Sparkle

suppression can be temporarily turned off. This is done

by writing a 1 to the sparkle flag (using SYS(14) ). Use

the following program exam ples.

POKE SYS(15),1,0 :'Fast- w/ sparkle

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 82 83

Komentáře k této Příručce

Žádné komentáře

Remote-processing RPC-2350 Uživatelský manuál Strana 62

Komentáře k této Příručce

Související produkty a manuály pro Počítače Remote-processing RPC-2350