Component: 7Segment (Single) (Segment)

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Author Matrix Ltd
Version 1.4
Category Segment


7Segment (Single) component

Seven segment display modelled after a standard 14mm high unit. LED colour can be changed in properties.

Component Source Code

Please click here to download the component source project: FC_Comp_Source_LED_7Seg_Single_2dgi.fcfx

Please click here to view the component source code (Beta): FC_Comp_Source_LED_7Seg_Single_2dgi.fcfx

Detailed description

No detailed description exists yet for this component

Examples

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. FC6 Icon.png 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. FC6 Icon.png 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. FC6 Icon.png 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.

FC6 Icon.png 7Segment Character Demo



Macro reference

ClearDigit

Fc9-comp-macro.png ClearDigit
This funtion clears all the individual segments including the decimal point segment. In simulation this sets the colours to the default BGColor component variable. It's default value is 0xCCCCCC 
Fc9-void-icon.png - VOID Return


ShowDigit

Fc9-comp-macro.png ShowDigit
Creates the supplied digit on the 7 segment display. Macro takes the digit to display and a boolean representing whether to display the decimal point segment or not. 
Fc9-u8-icon.png - BYTE Digit
Sets the 7seg display with the appropriate digit supplied 
Fc9-u8-icon.png - BYTE DecimalPoint
Determines whether decimal point LED is active (True/False) 
Fc9-void-icon.png - VOID Return


ShowSegments

Fc9-comp-macro.png ShowSegments
Allows the individual segments of the display to be controlled. 
Fc9-u8-icon.png - BYTE Segments
8-bit Binary value to set the segments, bit0 = segA, bit1 = segB... 
Fc9-void-icon.png - VOID Return


Property reference

Fc9-prop-icon.png Properties
Fc9-type-16-icon.png Display Type
Set this property to match your hardware device. Common Anode: Pin true -> LED off, Pin false -> LED on Common Cathods: Pin true -> LED on, Pin false -> LED off 
Fc9-type-7-icon.png Show Seg Labels
Show the identifier lables of the segments overlayed over the component. 
Fc9-type-7-icon.png Common Pin
When using a single 7-segment display you can keep the common pin active by connecting it to VCC or VSS so no output pin is required. When using multiple 7-seg displays you need the common pin to allow you to multiplex between the displays. 
Fc9-type-16-icon.png Common Type
The state of the output common pin when the 7-segment display is active. Usually a common cathode display uses a low signal and a common anode uses a high signal. If the common pin is routed via a transistor for power amplification then the signal may need to be reversed.  
Fc9-conn-icon.png Connections
Fc9-type-5-icon.png pin0 (A)
Pin connected to the 'A' degment of the display. 
Fc9-type-5-icon.png pin1 (B)
Pin connected to the 'B' degment of the display. 
Fc9-type-5-icon.png pin2 (C)
Pin connected to the 'C' degment of the display. 
Fc9-type-5-icon.png pin3 (D)
Pin connected to the 'D' degment of the display. 
Fc9-type-5-icon.png pin4 (E)
Pin connected to the 'E' degment of the display. 
Fc9-type-5-icon.png pin5 (F)
Pin connected to the 'F' degment of the display. 
Fc9-type-5-icon.png pin6 (G)
Pin connected to the 'G' degment of the display. 
Fc9-type-5-icon.png pin7 (DP)
Pin connected to the decimal pointt of the display. 
Fc9-type-5-icon.png common
Pin connection to the 'common' pin of the display - to allow enable/disable of the whole display. 
Fc9-conn-icon.png Colors
Fc9-type-1-icon.png LED Colour
Color when an LED is turned on. When turned off, will use a much darker shade of the same hue. 
Fc9-type-1-icon.png Bezel Colour
Color of the plastic package housing the LEDs 
Fc9-type-1-icon.png Label Colour
Color of the optional segment name labels. 
Fc9-type-1-icon.png LED Auto Off Colour
Color when an LED is turned on. When turned off, will use a much darker shade of the same hue.