Component: LED Array (LEDs)

Author	Matrix TSL
Version	1.0
Category	LEDs

LED Array component

An array of LED indicators equally spaced and complete with labels to indicate their meaning. Embedded can be used to control an 8-bit port or up to 8 individual pins.

Component Source Code

Please click here to download the component source project: FC_Comp_Source_LED_Array_2dgi.fcfx

Please click here to view the component source code (Beta): FC_Comp_Source_LED_Array_2dgi.fcfx

Detailed description

No detailed description exists yet for this component

Examples

Each segment will require a current limiting resistor.

This LED Calculator tool is a good resource for calculating the correct LED series protection resistor.

LED Resistor Calculator Tool

Simple Counter

This example counts up from 0 to 9 on the 7-segment display before wrapping back to 0 and starting again. When displaying odd numbers we light the decimal point segment. 7Segment Display Example

Multiplexed Counter

This next example counts up from 0 to 99 on two 7-segment displays before wrapping back to 0 and starting again. The two displays are driven using a technique called multiplexing. A timer interrupt is used to perform the multiplexing leaving our program free to perform other tasks. Each 7-segment display shares the same segment pin connections but has a unique common pin connection to allow each individual 7-segment display to display a unique value. 7Segment Multiplex

Stop Watch

This next example uses a timer interrupt to multiplex between the displays and a second timer interrupt to count the passing of time allowing for accurate timings. Using four single 7-seg components we create a timer capable of monitoring time from 0.0 to 999.9 seconds in multiples of 100ms. The second timer interrupt flags to the main when the count value has changed allowing the heavier calculations to extract the digits from the counter to be done outside of the high speed interrupt routine and therefore maintain accurate timing.

Switches connected to Port D allow for the timer to be started, stopped and reset. 7Segment Timer

Segment Control

This example shows a method to display custom characters on 7-segment displays and also allows for numeric values to be displayed.

7Segment Character Demo

Macro reference

	BarGraph
Turns on the first N elements of the array - for generating bar graph metes etc.
- BYTE	Length
How many items to light up.
- VOID	Return

	LEDOn
Turn on the selected LED.
- BYTE	Index
Index of the LED to turn on.
- VOID	Return

	AllOn
Turns on all elements
- VOID	Return

	LEDOff
Turn off the selected led.
- BYTE	Index
Index of the LED to turn on.
- VOID	Return

	PointGraph
Turns on the Indexed LED and turns all others off. Does nothing if the index is out of range.
- BYTE	Index
The LED to show.
- VOID	Return

	WriteValue
Write a number which is presented on the LEDs in binary.
- BYTE	Value
Provide a value to be written to the LEDs in binary
- VOID	Return

	AllOff
Turns off all elements
- VOID	Return

Property reference

	Properties
	Count
The number of LEDs in the array from 1 to 8.
	Connections
	Output Mode
	Port
	Polarity
	Simulation
	Switch layout
	Distance between LEDs
	Label colour
	Component Label
	Show Connection Label
If enabled, the pin designation will be shown, e.g. B0.
	Show Pin Value
Pin status of VCC or GND will be shown when enabled and simualtion is running.
	Appearance
	Shape
	Colour
	Style