Embedded and RealTime Computing

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Embedded and Real-Time Computing
2
Real-Time
Embedded

• Speed of response is important
• Too late gt
• Inconvenience
• Damage
• Loss of life

• Computer processor is a component of a larger
  system
• Dedicated to a single function
• Computer is simply a component
• Always on

3
Real-Time and Embedded Systems

• Embedded Examples
• Mobile phones
• CD players, TV, VCR
• Microwave ovens
• Toys
• MP3 players,
• Real-Time Examples
• Automotive systems air bag, ABS,
• Industrial control
• Communications

Some Systems are both Embedded and Real-Time
e.g., Automobile Anti-lock Brakes
4
Components

• Hardware
• Input, output devices
• Memory
• Computer Processors
• Communications devices
• Software
• Instructions

5
Example airbag deployment
13-22 km/h
processor
sensor
Bag fully inflated
Driver rides the bag down
Time
0
25 ms
50 ms
impact
6
Market

• Over 5 billion microprocessors sold each year
  5000000000!
• Embedded applications outnumber desktop PCs 30
  times
• Some toys have more computing power than
  mainframe computers of 25 years ago

7
Motor Control
Motor
Processor
F
R
S
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Remote Sensing
Antenna
Radio signals
Remote sensing station
Base station
T 12.6 P 73
Sensors temperature, Pressure, etc