Remote-processing CAMBASIC Manual do Utilizador descarregar pdf (Página 69)

Commands - 36

A point is erased using the CLEAR DISPLAY P(x, y) command. Gr aphics dots in a line are cleared

using the CLEAR DISPLA Y LINE command.

ON enables character, graphics, or both displays. Power on default is both graphics and character

display ON. Turning on or off the character or graphics does not affect the other. In other wor ds,

you could turn characters on without affecting the graphics display. It is possible to update the

graphics and character screen even if they are off.

Large Character Commands

Some versions of CAM BASIC pr int larger char acters. These characters are drawn as gr aphics.

DISPLAY M(x,y)"text"; Print medium size characters

DISPLAY M,R(x,y)"text"; Print medium size characters in reverse color format

DISPLAY L(x,y)"Text"; Print large size characters

DISPLAY L,R(x,y)"Text"; Print large size characters in revers color format

Medium size characters are position based on a graphical X and Y pixel position. When printing a

string, characters automatically advance to the right. X, Y coordinates specify the upper right corner

of the character block.

Large size char acter position is based on pixel and small character resolution. X position star ts

based on small character set. F or a 320 x 240 pixel display, maximum X position is 34. Y position

sets the top of the character.

Character fonts are stored in flash and may be changed. Refer to your hardware manual for more

information.

"Text" can be a number or the CH R$() com mand. Be sure to ter minate the comm and with a semi-

colon (;). Leaving it out will send a < CR> < LF> sequence (2 spaces) to the display.

RELATED: CONFIG DISPLAY

EXAMPLE: The example below is for the LCD– 4x40 display.

Notice that all DISPLAY statements end with a semicolon so that a carriage return/line feed will not

be sent.

10 CONFIG DISPLAY &40,7,0

20 A$ = "--PRESENTING--"

30 B$ = "--------"

40 C$ = "160 Character LCD display"

50 D$ = "with LED backlighting"

60 DISPLAY (0,5) A$;

70 DISPLAY (1,14) B$;

80 DISPLAY (2,6) C$;

90 DISPLAY (3,8) D$;

100 DELAY 2

110 DISPLAY (0,0) CHR$(32,80);

120 DISPLAY (2,0) CHR$(32,80);

130 DELAY .5

140 GOTO 60

Line 10 installs the driver for the LCD– 4x40 at address &40 with no visible cursor.

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Remote-processing CAMBASIC Manual do Utilizador Página 69