Component: 7Segment (Single) (Displays: Segment)

From Flowcode Help
Jump to: navigation, search


Author Matrix Ltd
Version 1.4 (Release)
Category Displays: Segment


Contents

Image 7Segment (Single) component

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

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


Downloadable macro reference

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

Parameters

This macro has no parameters


Return value

This call does not return a value


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.

Parameters

BYTE Digit
Sets the 7seg display with the appropriate digit supplied
BYTE DecimalPoint
Determines whether decimal point LED is active (True/False)


Return value

This call does not return a value


Simulation macro reference

This component does not contain any simulation macros


Property reference

Display Type

This property is of type Fixed list of ints and can be referenced with the variable name 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

Show Seg Labels

This property is of type True or false and can be referenced with the variable name ShowSegLabels.

Show the identifier lables of the segments overlayed over the component.

Common Pin

This property is of type True or false and can be referenced with the variable name CommonPin.

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.

pin0 (A)

This property is of type Single digital pin and can be referenced with the variable name pin0.

Pin connected to the 'A' degment of the display.

pin1 (B)

This property is of type Single digital pin and can be referenced with the variable name pin1.

Pin connected to the 'B' degment of the display.

pin2 (C)

This property is of type Single digital pin and can be referenced with the variable name pin2.

Pin connected to the 'C' degment of the display.

pin3 (D)

This property is of type Single digital pin and can be referenced with the variable name pin3.

Pin connected to the 'D' degment of the display.

pin4 (E)

This property is of type Single digital pin and can be referenced with the variable name pin4.

Pin connected to the 'E' degment of the display.

pin5 (F)

This property is of type Single digital pin and can be referenced with the variable name pin5.

Pin connected to the 'F' degment of the display.

pin6 (G)

This property is of type Single digital pin and can be referenced with the variable name pin6.

Pin connected to the 'G' degment of the display.

pin7 (DP)

This property is of type Single digital pin and can be referenced with the variable name pin7.

Pin connected to the decimal pointt of the display.

common

This property is of type Single digital pin and can be referenced with the variable name common_pin.

Pin connection to the 'common' pin of the display - to allow enable/disable of the whole display.

LED Color

This property is of type Color picker and can be referenced with the variable name FGColor.

Color when an LED is turned on. When turned off, will use a much darker shade of the same hue.

Bezel Color

This property is of type Color picker and can be referenced with the variable name BGColor.

Color of the plastic package housing the LEDs

Label Color

This property is of type Color picker and can be referenced with the variable name LabelColor.

Color of the optional segment name labels.

Personal tools