7/23 CSE 325 Embedded Microprocessor System Design Fall 2010 Computer Science & Engineering Department Arizona State University Tempe, AZ Dr. Yann-Hang Lee Brickyard 552 (480)

set Course Syllabus (1)  To focus in  the integration of hardware modules to construct embedded systems,  the programming models and characteristics of various input/out interfaces.  Use either assembly language or any high-level languages  Course Goals:  Develop an understanding for using a CPU core as a component in system-level design.  Ability to integrate CPU core with various interface units in embedded controllers.  Skills for programming and debugging I/O operations to manage peripherals for embedded applications.  Pre-requisites:  Assembly language, microprocessor organization, and experience of C programming language

set Course Syllabus (2)  Major topics covered:  Introduction and review of instruction set and assembly language programming (3 lectures)  Interfacing between C and assembly languages (2 lectures)  Coldfire processor and IO multiplexing (2 lecture)  Interrupt and exception (2 lectures)  Timers and counters (2 lectures)  Serial communication: UART, SPI, and I2C (5 lectures)  Parallel I/O interface and signal handshaking (2 lectures)  Keyboards and LCD (3 lectures)  A/D-D/A converters (2 lectures)  Memory devices, SRAM, DRAM, flash memory, and SDRAM controller (4 lectures)

set Course Syllabus (3)  Office hours:  3:45pm – 5:30pm, Monday and Wednesday  Evaluation  Midterm exams (20%) (during the class periods on March 10)  Lab assignments (50%)  Final exam (30%) (during the final exam period scheduled by the University, i.e. 9:50-11:40am, Dec. 15)  You can bring in a set of manuals (to be specified), calculator, and a 3x5 note card to the exams.

set Target Environment  Freescale Project Board Student Learning Kit and Coldfire 5211SLK  Development Software  CodeWarrior IDE (editor, compiler, assembler, debugger, etc.)

set Embedded Systems  Computer (general)  PC on desk top  Windows, , instant message, Microsoft word, power point, games  computation and communication  Embedded system  the software and hardware component that is an essential part of an application system Plantsensoractuator Control and computation Reference input Embedded Controller

Embedded Systems -- Examples

set Applications of Embedded Systems  They are everywhere  How many CPUs in your PC  The average new car has a dozen microprocessors in it. The Mercedes S-class has 65.  How many microprocessors in average household  microwave oven  washer, dryer,  dishwasher  garage opener  HDTV

set Hardware Platform  Organization  buses to connect components – PCI, ISA, PC104+  Package  standard chips on PC  processor + ASIC  SOC CPU (micro- processor) I/O Timer memory

set Embedded Processors  Must be optimized for applications  performance, speed  power  I/O peripherals  Processor cores + peripheral interfaces  x86 processor + PCI bus  SoC (system on a chip) architecture  integrate CPU core and peripheral interfaces on one chip  with some internal RAM and external boot memory  extendable with an external bus  HC11 micro-controller  SoC platforms  configurable IP blocks and software support  Applications: handheld computing, cellular phone, infotainment, automobile, etc.

set Simple SW Structure for Embedded Systems  To write the control software (program) for a smart washer  initialize  read keypad or control knob  read sensors  take an action  System current state  state transition diagram  external triggers via polling or ISR  Threads for concurrent operations initialization external trigger? Take actions Change system state ISR: to set/clear events

set Software Structure of Periodic Tasks  Invoke computation periodically  Adjust pressure valves at a 20 Hz rate wait for the interrupt event Task initialization (set up periodic timer interrupts) computation start_time=time( ) Task initialization computation Sleep(period - ( time( ) -start_time) )

set Embedded System Development  Development process  integrate HW components  develop programs  Test  Development environment Requirements Test/verification Implementation (HW and SW) Ethernet Simulated signal source (Workstation, embedded system development tools) (workstation, interface cards, & test harness) Development workstationEmbedded systems

set Development Environment  Use the host to  edit, compile, and build application programs  configure the target  At the target embedded system, use tools to  load, execute, debug, and monitor (performance and timing) Target X.c X.cpp X.s Makefile GNU X.o X.out vxWorks CrossWind WindSh Browser WindView Tornado Tools VxWorks RTOS & Target agent WDB Agent Target Server Applications (text, data) Host Target