CIRCLE

CIRCLE

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Action

Draws a circle on a graphic display.

 

 

Syntax

CIRCLE(x0,y0) , radius, color

 

 

Remarks

X0

Starting horizontal location of the line.

Y0

Starting vertical location of the line.

Radius

Radius of the circle

Color

Color of the circle

 

 

See Also

LINE

 

 

Example

'-----------------------------------------------------------------------------------------

'name                     : t6963_240_128.bas

'copyright                : (c) 1995-2005, MCS Electronics

'purpose                  : T6963C graphic display support demo 240 * 128

'micro                    : Mega8535

'suited for demo          : yes

'commercial addon needed  : no

'-----------------------------------------------------------------------------------------

 

$regfile = "m8535.dat"                                     ' specify the used micro

$crystal = 8000000                                         ' used crystal frequency

$baud = 19200                                               ' use baud rate

$hwstack = 32                                               ' default use 32 for the hardware stack

$swstack = 10                                               ' default use 10 for the SW stack

$framesize = 40                                             ' default use 40 for the frame space

 

'-----------------------------------------------------------------

'                     (c) 2001-2003 MCS Electronics

'                 T6963C graphic display support demo 240 * 128

'-----------------------------------------------------------------

 

'The connections of the LCD used in this demo

'LCD pin                  connected to

' 1        GND            GND

'2        GND            GND

'3        +5V            +5V

'4        -9V            -9V potmeter

'5        /WR            PORTC.0

'6        /RD            PORTC.1

'7        /CE            PORTC.2

'8        C/D            PORTC.3

'9        NC             not conneted

'10       RESET          PORTC.4

'11-18    D0-D7           PA

'19       FS             PORTC.5

'20       NC             not connected

 

'First we define that we use a graphic LCD

' Only 240*64 supported yet

Config Graphlcd = 240 * 128 , Dataport = Porta , Controlport = Portc , Ce = 2 , Cd = 3 , Wr = 0 , Rd = 1 , Reset = 4 , Fs = 5 , Mode = 8

'The dataport is the portname that is connected to the data lines of the LCD

'The controlport is the portname which pins are used to control the lcd

'CE, CD etc. are the pin number of the CONTROLPORT.

' For example CE =2 because it is connected to PORTC.2

'mode 8 gives 240 / 8 = 30 columns , mode=6 gives 240 / 6 = 40 columns

 

'Dim variables (y not used)

Dim X As Byte , Y As Byte

 

 

'Clear the screen will both clear text and graph display

Cls

'Other options are :

' CLS TEXT   to clear only the text display

' CLS GRAPH  to clear only the graphical part

 

Cursor Off

 

Wait 1

'locate works like the normal LCD locate statement

' LOCATE LINE,COLUMN LINE can be 1-8 and column 0-30

 

 

Locate 1 , 1

 

'Show some text

Lcd "MCS Electronics"

'And some othe text on line 2

Locate 2 , 1 : Lcd "T6963c support"

Locate 3 , 1 : Lcd "1234567890123456789012345678901234567890"

Locate 16 , 1 : Lcd "write this to the lower line"

 

Wait 2

 

Cls Text

 

 

'use the new LINE statement to create a box

'LINE(X0,Y0) - (X1,Y1), on/off

Line(0 , 0) -(239 , 127) , 255                             ' diagonal line

Line(0 , 127) -(239 , 0) , 255                             ' diagonal line

Line(0 , 0) -(240 , 0) , 255                               ' horizontal upper line

Line(0 , 127) -(239 , 127) , 255                           'horizontal lower line

Line(0 , 0) -(0 , 127) , 255                               ' vertical left line

Line(239 , 0) -(239 , 127) , 255                           ' vertical right line

 

 

Wait 2

' draw a line using PSET X,Y, ON/OFF

' PSET on.off param is 0 to clear a pixel and any other value to turn it on

For X = 0 To 140

Pset X , 20 , 255                                       ' set the pixel

Next

 

For X = 0 To 140

Pset X , 127 , 255                                       ' set the pixel

Next

 

Wait 2

 

'circle time

'circle(X,Y), radius, color

'X,y is the middle of the circle,color must be 255 to show a pixel and 0 to clear a pixel

For X = 1 To 10

Circle(20 , 20) , X , 255                                 ' show circle

Wait 1

Circle(20 , 20) , X , 0                                   'remove circle

Wait 1

Next

 

Wait 2

 

For X = 1 To 10

Circle(20 , 20) , X , 255                                 ' show circle

Waitms 200

Next

Wait 2

'Now it is time to show a picture

'SHOWPIC X,Y,label

'The label points to a label that holds the image data

Test:

Showpic 0 , 0 , Plaatje

Showpic 0 , 64 , Plaatje                                   ' show 2 since we have a big display

Wait 2

Cls Text                                                   ' clear the text

End

 

'This label holds the mage data

Plaatje:

'$BGF will put the bitmap into the program at this location

$bgf "mcs.bgf"

 

'You could insert other picture data here