VAST 8 LED Matrix Board (V8x8LED)

General Description

The VAST 8x8 LEDis a 2.4" square matrix of 64 LEDs. The matrix display is designed to display high intensity bar graph or line graph displays.

Quick Start

1. Install jumpers to ADDR pins 1-2, 3-4, 5-6 and 7-8. This puts the V8x8LED at VAST address 0.

2. Connect the VAST cable to the SBC2000.

3. Apply power and execute the following code: 

subroutine delay(arg as integer) 
	local index as integer 
	for index=0 to arg 
		REM 
	NEXT 
END
 
GLOBAL row AS INTEGER, column AS INTEGER 
REM turn on the display, 50% intensity 
VLED_COMMAND(0,15) 
DO 
	FOR row = 0 TO 7 
		FOR column=0 TO 7 
			VLED_MATRIX(column,2^row) 
			delay(500) 
			VLED_MATRIX(column,0) 
		NEXT 
	NEXT 
LOOP UNTIL 0

Software Control

VLED_MATRIX()
VLED _MATRIX() writes the byte of data to the digit at the specified position.

VLED _MATRIX(position, byte)

Where:
"position "
is the position of the LED in the LED matrix. Refer to the documentation for the peripheral you are using for more information.
"byte"
is value that you want to write.
Each bit of the byte controls a segment.

VLED_COMMAND()

VLED_COMMAND(board, intensity)

Where:
"board"
is the VAST address as determined by the ADDR jumpers. Refer to the documentation on the peripheral you are using for more information.
"intensity"
is a byte of data encoded as follows:
D7 Test - all segments on at maximum intensity when this bit is set to zero
D6-D4 Set to 0 - not used
D3-D0 Intensity - 0=off, 15=maximum
D6-D4 must be set to zero for proper operation. Non-zero values will disable areas of the matrix. Non-zero values will cause a subset of the digits to be individually enabled, starting from the rightmost digit.

V8x8led Address Jumpers

V8x8led Dimension Drawing

Dimensions are in inches.

V8x8led Schematic