Glossary
Arrow Key
in Normal Mode. Right, Left, Up, Down
Chase Lights
A row of pixels at the periphery of the display that are illuminated in a sequence to give the impression of lights chasing each other around the edge display.
Child
A message that has a parent. All messages but the top of the hierarchy are child messages.
Command
A command causes some action beyond simply displaying a message. A command is associated with a message. It may be in the hierarchical data representing the message, or may be in hidden text.
Display
(noun) The area on the face of the LEDybug that has a variable, visible image, including text.
(verb) To “display a message” is to cause the message to appear in the display.
Forth
A programming language invented by Charles Moore characterized by separate parameter and return stacks; and by code which can be interpreted directly as well as compiled.
Hidden Text
Text in a message that is not normally displayed. The text is delimited by braces: "Normal {Hidden}." Enables variable display, commands, initialization.
Hierarchy
A collection of messages and parent/child relations. A message can have zero or more child messages. If a message has one or more child messages, it is a parent. One message at the top of the hierarchy is the parent, directly or indirectly, of all other messages in the hierarchy.
Initialization
xxx
LEDybird
A PC application that simulates the LEDybug and communicates with a LEDybug by USB.
LEDybug
A handheld, battery powered LED display device.
List
A hierarchy or sub-hierarchy coded for permanent storage.
ListUser
xxx
ListSys
xxx
Menu
xxx
Message
An ASCII text string. The unit of text that is scrolled repeatedly by the LEDybug. A message may have children (in a hierarchy) or a command.
Next
key in Normal and xx Mode
Parent
A message that has one or more child messages.
Previous
key in Normal and xx Mode
Scroll
(verb) To move text across a display so that it may be read as it moves.
Search
xxx
Search Argument
xxx
Sibling
The relation of two messages that have the same parent.
Sub-hierarchy
Part of a hierarchy comprised of a given message and all of its children, direct and indirect.
Tack On
(verb) To temporarily attach one or more messages as a children to another message. See Reference Manual » LEDybug.
Tag
xxx

© 2010 LEDybug LLC