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Engr355 - Embedded Systems Design 1
Embedded Computing Overview
Dr. Curtis Nelson
Engr355 – Embedded Systems DesignWalla Walla University
Objectives
• Provide a general overview of Embedded Systems;• Show examples of Embedded Systems;• Show current statistics in the field of Embedded
Systems.
Engr355 - Embedded Systems Design 2
Embedded Systems Are Everywhere!
SmartPenTire Pressure Sender
What Is an Embedded System?
• An embedded system is a computer system designed to perform one or a few dedicated functions often with real-time computing constraints. It is embedded as part of a complete device often including hardware and mechanical parts. By contrast, a general-purpose computer, such as a personal computer, is designed to be flexible and to meet a wide range of end-user needs. Embedded systems control many devices in common use today.
-- Wikipedia
Engr355 - Embedded Systems Design 3
Examples of Embedded Systems
• Air conditioner• ATM machine• Battery charger• Digital camera• DVD player• Fax machine• Home security system• Mobile phone• Modem
• Navigation system• PDA• Photocopier• Printer• Router• Scanner• TV• Video game console• Wearable computer
Embedded Automotive
• More than 30% of the cost of a car is now in Electronics.• 90% of all innovations in the near future will be based on
electronic systems.
Slide courtesy of Alberto Sangiovanni-Vincentelli®
Engr355 - Embedded Systems Design 4
History (1/3)
• In the earliest years of computers in 1930 – 40s, computers were sometimes dedicated to a single purpose task.
• One of the first recognizably modern embedded systems was the Apollo Guidance Computer, developed by Charles Stark Draper at the MIT Instrumentation Laboratory.
History (2/3)
• Since early applications in the 1960s, embedded systems have come down in price and there has been a dramatic rise in processing power and functionality. The first microprocessor for example, the Intel 4004 was designed for calculators and other small systems but still required many external memory and support chips.
Engr355 - Embedded Systems Design 5
History (3/3)
• By the mid-1980s, most of the common previously external system components had been integrated into the same chip as the processor and this modern form of the microcontrollerallowed an even more widespread use, which by the end of the decade were the norm rather than the exception for almost all electronics devices.
Attributes of Embedded Computing
• Real-time operation;• Sensing & control;• Low cost;• Low power consumption;• Dependable;• Autonomous.
Engr355 - Embedded Systems Design 6
Characteristics (1/4)
• Special-purpose– Typically designed to
execute a single program, repeatedly
– It used to be single-purpose
– Now, multi-functioned, but single-purpose
– Low cost and efficient
Characteristics (2/4)
• Tightly constrained– Low cost– Simple systems– Fewer components – Performs functions as
slow as allowable– Minimum power
Engr355 - Embedded Systems Design 7
Characteristics (3/4)
• Reactive and real-time– Reactive: Continually
reacts to external events– Real-time: Must compute
certain results in real-time
Characteristics (4/4)
• Hardware and software co-exist– The software written for
embedded systems is often called firmware
– It is stored in read-only memory or Flash memory chips rather than a disk drive
Engr355 - Embedded Systems Design 8
System on a Chip (SoC)
• Integrating all components of a computer or other electronic systems into a single integrated circuit (chip).
• May contain digital, analog, mixed-signal, and often radio-frequency functions – all on one chip.
• A typical application is in a cell or smart phone.
Typical Microcontroller Architecture
Engr355 - Embedded Systems Design 9
Development Tools
• Embedded system designers use compilers, assemblers, and debuggers to develop embedded system software. However, they may also use some more specific tools:– In circuit debuggers or emulators.– Utilities to add a checksum or CRC to a program, so the embedded
system can check if the program is valid.– For systems using digital signal processing, developers may use a
math workbench such as MATLAB, MathCad, or Mathematica to simulate the mathematics. They might also use libraries for both the host and target which eliminates developing DSP routines.
– An embedded system may have its own special language or design tool, or add enhancements to an existing language such as Forth, C, or Basic.
– Another alternative is to add a real-time operating system or embedded operating system.
User Interface
• Embedded systems range from no user interface at all — dedicated only to one task — to full user interfaces similar to desktop operating systems in devices such as tablets or smart phones.
Engr355 - Embedded Systems Design 10
Remember Your Childhood?
What the Customer Wanted
Engr355 - Embedded Systems Design 11
What the Customer Got
Embedded Market Studies
• 2014 - Copyright by UBM Tech. All rights reserved.– http://bd.eduweb.hhs.nl/es/2014-embedded-market-study-then-now-whats-next.pdf
• 2015 – Copyright bu UBM Tech. All rights reserved.– http://webpages.uncc.edu/~jmconrad/ECGR4101-2015-
08/Notes/UBM%20Tech%202015%20Presentation%20of%20Embedded%20Markets%20Study%20World%20Day1.pdf
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Current Embedded Design Environment
Embedded Design Process
Engr355 - Embedded Systems Design 13
Operating Systems
Microprocessors
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FPGA’s, Memory, LCD’s
Hardware IP’s, System Level Design, and GUI’s
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References
• Embedded Systems: Architecture, Programming, and Design by Raj Kamal
• Embedded Systems Handbook by Richard Zurawski• Wikipedia.org• Lego.com
Summary
• Provided a general overview of Embedded Systems;• Showed examples of Embedded Systems;• Showed current statistics in the field of Embedded
Systems.