Embedded Systems

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Embedded SystemsECE 420 DSP Lab

• October 27, 2008

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Embedded Systems I

• Traditionally
• Special purpose computer designed to perform one
  or a few dedicated functions
• Real-time constraints
• Embedded as part of a complete device
• Examples
• Modem/router
• Traffic lights
• Microwave
• Digital watch

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Embedded Systems II

• More loosely
• Low power, portable devices
• May or may not have real-time critical
  constraints
• Embedded user interface
• Examples

Portable Data Collection Point-of-Sale
Devices Gaming Web Tablet Smart White Goods Ultra
Mobile Devices
Portable Navigation Devices Portable Media
Player Advanced Portable consumer
Electronics Digital TV Digital Video Camera
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TI OMAP Overview

• Open Multimedia Application Platform
• Originally designed for Nokia
• Offers low-power, real-time processing
  capabilities of a DSP with the command and
  control functionality of a GPP (general purpose
  processor)
• OMAP platforms available for projects in ECE 420
• OMAP 5912 Starter Kit (OSK)
• OMAP 3503 Evaluation Module (EVM)
• Beagle board (OMAP 3530)

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OMAP vs. DSP Starter Kit

• Development flow (typical)

OMAP Starter Kit
DSP Starter Kit
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OMAP 5912 Starter Kit

• Example applications
• Mimosa Acoustics HearID auditory diagnostic
  system
• Audio playback with real-time user control

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Audio Playback with User Control

• Typical application processing flow

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OMAP 35x

• The OMAP 3 architecture is designed to provide
  best-in-class multimedia processing (i.e. audio,
  video, image, graphics)
• Streaming video
• 2D/3D mobile gaming
• Video conferencing
• Video and image capture
• Rich multimedia-featured handsets and PDAs

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OMAP 3503 Evaluation Module

• OMAP 3503
• 600 MHz ARM Cortex-A8
• Compared to 198 MHz ARM in 5912
• Enhanced user interface
• LCD touchscreen
• Push buttons
• Example application

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Patient Monitoring System
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Beagle Board

• OMAP 3530
• 600 MHz ARM Cortex-A8
• 430 MHz c64x DSP
• Compared to 196 MHz fixed point c55x DSP
• 2D/3D graphics accelerator
• Supports OpenGLES 2.0,
• Direct3D
• Example applications

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HD quality decoding on the ARM
MPEG4 video decoded on DSP, blended onto Linux
desktop
Beagle board