122-32000 Parallax Inc, 122-32000 Datasheet - Page 87

• Manufacturer Part Number: 122-32000
• Description: MANUAL PROPELLER
• Manufacturer: Parallax Inc

Specifications of 122-32000

• Accessory Type: Manual
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: Propeller Education (PE) Kit
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

By using existing objects, more sophisticated applications can be built very quickly. For
instance, an application can include both the Keyboard and Mouse objects, and with just a
few additional lines of code, a standard user interface is realized. Since the objects are self-
contained and provide a concise software interface, application developers don’t necessarily
need to know exactly how an object achieves its task just to be able to use it. In a similar
way, a driver of a car doesn’t necessarily know how the engine works, but as long as that
driver understands the interface (the ignition key, gas pedal, brakes, etc.) he or she can make
the car accelerate and decelerate.
Well-written objects can be created by one developer and easily used by many different
applications from many different developers.
Objects and Applications
A Propeller Object consists of Spin code and, optionally, Propeller Assembly code; see
Figure 3-1. We’ll simply call these “objects” from now on.
Objects are stored on your computer as files with “.spin” extensions, therefore you should
always think of each Spin file as an object.
Spin Code
Propeller Assembly Code
Propeller Object
Figure 3-1: Propeller
Object
Propeller Manual v1.0 · Page 87