28029 Parallax Inc, 28029 Datasheet - Page 179

• Manufacturer Part Number: 28029
• Description: KIT PARTS SMART SENSORS W/TEXT
• Manufacturer: Parallax Inc

Specifications of 28029

• Accessory Type: Parts Kit
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: BASIC Stamp® or Javelin Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 28029PAR

Chapter 5: Accelerometer Gaming Basics
Chapter 3 introduced you to the Memsic Dual-Axis Accelerometer. Similar devices can
be found in lots of HIDs (Human Interface Devices), a category which includes computer
mice, keyboards, and more generally, anything that makes it possible for humans to
interact with microprocessors. With limited space on PDAs (Personal Digital Assistants)
like the one in Figure 5-1, tilt control eliminates the need for extra buttons. In this
example, tilting allows the user to pan around on a map without pushing any buttons. Tilt
control is also a popular feature in certain game controllers.
Figure 5-1:Tilt-Controlled PDA
Photos of RotoView® tilt-controlled PDA interface in action courtesy of Innoventions®,
www.innoventions.com
This chapter has four activities that demonstrate the various facets of using tilt to control
a display. Here are summaries of each activity:
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Activity #1: PBASIC Graphic Character Display – introduces some Debug
Terminal cursor control and coordinate-plotting basics.
Activity #2: Background Store and Refresh with EEPROM – Each time your
game character moves, whatever it was covering up on the screen has to be re-
drawn. This activity demonstrates how you can move your character and refresh
the background with the help of the BASIC Stamp’s EEPROM.
Activity #3: Tilt the Bubble Graph – With a moving asterisk on a graph, this
first application illustrates how the hot air pocket inside the MX2125 moves
when you tilt it. At the same time, it puts the accelerometer fundamentals to
work along with the techniques from Activity #2.
Chapter 5: Accelerometer Gaming Basics · Page 167