oVideoIC Object

Description
Operation
Properties
Methods

Examples
Connections
Related
Version History & Bug list

An Object that overlays text on a video signal using an Intuitive Circuits OSD232 On-Screen Display Character Overlay Board.

The following table lists the size and availability of the oVideoIC Object.

	Object	Size	Description	A1	A2	B1	B2	C1
	oVideoIC	5 Bytes	Controls an Intuitive Circuits On-Screen Display Character Overlay board.			x	x	x

Operation:

When the oVideoIC Object's Value property is set to the ASCII value of a character, that character is sent out the I/O Lines specified by the IOLine property in such a way that an Intuitive Circuits OSD232 On-Screen Display Character Overlay Board will display the character.

Setting the Value property to a string of characters will sequentially send each character in the string to the OSD232 module. (see examples)

Invoking the Locate method will cause the cursor to be positioned on the screen at the specified X-Y coordinates.

Invoking the Clear method will cause the OSD232 module to clear the screen of any characters.

When created, the oVideoIC Object also creates an instance of the oSerialL object which it uses to control the display. The properties of the instance of the oSerialL Object are configured to transmit data at 4800 baud with an inverted serial signal. modifying that or any other properties of the oSerialL instance will affect the oVideoIC Object's operation in ways that could make the it unable to control the display. See the oSerialL Help for more detail on how the serial port communicates with devices such as the Intuitive Circuits On-Screen Display.

Properties:

The following table lists the properties of the oVideoIC Object:

Property
Description

Value

A value who's binary data is sent to the Video IC.

Object Class: oValue Value Range: 0 - 255

Data Type: Numeric Default Value: 0

VString

A string version of the Value property.

Object Class: oProperty

Data Type: Numeric

IOLine

A value that specifies which I/O Line is connected to the serial data line.

Object Class: oIOLine Value Range: 0 - 31

Data Type: Numeric Default Value: 0

Some I/O Lines have special purposes. Be sure to see oIOLine help file for details.

Serial

The I/O function object used to control the Video controller.

Object Class: oSerialL Value Range: 0 - 255

Data Type: Numeric Default Value: 0

Address

Returns a pointer to the address of the oCounter Object instance.

Object Class: oAddress Value Range: 0 - 127

Data Type: Pointer (Read Only) Default Value: Address of Object

Methods:

Methods	Description
Clear	Clears the screen.
Locate	Sets the cursor to the specified location. The Locate command uses two arguments; Row & Column, both of which are 0 based. Example: X.Locate(0,1) ' will locate cursor at 1st row, 2nd column. Example: X.Locate(1,9) ' will locate cursor at 2nd row, 10th column.

Examples:

In the following example, the oVideoIC Object is used.

'This program prints "Testing"
'to the middle of a video screen.

Dim A As New oVideoIC 

Sub Main()
  A.IOLine = 16
  A.FullScreen
  A.Clear
  ooPIC.Delay = 1
  A.Color(cvicRed, cvicBlue)
  A.Locate(6,11)
  A.Value = "Testing" 
End Sub

Connections:

The oVideoIC uses one I/O line. This I/O line is connected to the serial in line of the Intuitive Circuits OSD232 On-Screen Display Character Overlay Board.