Editing 7 Segment Display (section)

== Using the OUTPUT command ==

An alternative method of controlling the display is by using the OUTPUT command.
This allows you to set all the digital outputs on or off with one command.
Each individual output has a value as shown in the following table:

{|class="wikitable"
|-
|Output 0 || 1
|-
|Output 1 || 2
|-
|Output 2 || 4
|-
|Output 3 || 8
|-
|Output 4 || 16
|-
|Output 5 || 32
|-
|Output 6 || 64
|-
|Output 7 || 128
|}

Individual outputs can be switched on by adding up the values in the table and sending this value to Smart Box with the OUTPUT command.
The number zero requires outputs 0,1,2,3,4 and 5 to be switched on so by adding up the corresponding values in the table we get the value 63.
Try OUTPUT 63 to check that 0 is displayed.
Now try OUTPUT 3.
The number one will be displayed. 
Note that the OUTPUT command has also switched off the other digital outputs.
In this way the OUTPUT command can be used to reduce the number of program lines that you require.
It is of course much more difficult to determine from the program which outputs are going to be switched on when you read an OUTPUT command so this instruction tends to be used by experienced users.

[[Category:Outputs]]