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Getting started with IAR PowerPac for MSP430

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MS-DOS/MS-Windows compatible FAT12, FAT16 and FAT32 support. Multiple device driver support ... Full source code upgrade. Group license (up to 20 developers) ... – PowerPoint PPT presentation

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Title: Getting started with IAR PowerPac for MSP430


1
  • Getting started with IAR PowerPac for MSP430
  • Mats Pettersson, IAR Systems
  • Fast
  • Everything can be found on www.iar.com
  • Evaluation and kickstart versions free to
    download
  • Demo after the PowerPoint slides
  • Feedback and questions to support_at_iar.com

2
Agenda
  • Short introduction to IAR Systems
  • Real Time Operating System (RTOS) and a File
    System (FS)
  • IAR tools for MSP430
  • IAR PowerPac for MSP430
  • Support
  • Live demonstration
  • Summary

3
Support
IAR Systems
IAR PowerPac forMSP430
RTOSandFile System
Tools
4
IAR Systems
  • Founded in 1983 in Uppsala, Sweden
    (Headquarter)
  • About 140 employees
  • Offices in the US (3), China, Japan, the UK,
    Belgium, Germany, Brazil and Sweden
  • 80.000 application developers
  • Partner with 16 of the top semiconductor
    companies

5
Support
IAR Systems
IAR PowerPac forMSP430
RTOSandFile System
Tools
6
  • What is an RTOS?Software that manages the time
    and other resources of a microprocessor or
    microcontroller. It breaks down the application
    into multiple tasks each handling one aspect of
    the application. Its like having multiple
    CPUs!
  • What is a File System ?Software for storing and
    organizing data on storage devices. Functions
    to create and handle files and directories in an
    application.

RTOSandFile System
7
  • Why use an RTOS ?
  • Ensure that high priority tasks run first
  • Deterministic response
  • Saves power!
  • Saves development time
  • Easy to structure/divide code between
    developers.
  • Correctness - easier to understand complex
    systems
  • Makes programming more efficient/better
    structured
  • Abstracts the hardware-dependence, porting
    easier
  • and much, much more

RTOSandFile System
8
Scheduling
  • The algorithms that determine which task to
    execute
  • Distinguish between tasks that are ready to be
    executed and other tasks that are suspended
  • The task which is currently executing is referred
    to as the active task

RTOSandFile System
9
Tasks
  • Each task consist of
  • The program code, which usually resides in ROM
  • A stack, residing in a RAM area that can be
    accessed by the stack pointer
  • A task control block (TCB), residing in RAM. The
    TCB is only accessed by the RTOS

RTOSandFile System
10
Communication between tasks
  • As tasks run in the same application, they
    sometimes need to communicate with each other to
  • exchange data with other tasks
  • synchronize with other tasks
  • make sure that a resource is used by no more than
    one task at a time
  • Can be achieved by
  • Global variables..... ?
  • RTOS communication mechanisms ?

RTOSandFile System
11
Communication mechanisms
  • Mailboxes
  • A buffer that is managed by the real-time
    operating system
  • Fixed message size

EventsTask events are messages to a single,
specified recipient
  • Queues
  • Similar to mailboxes, but enable inter task
    communication with larger messages
  • Messages of various sizes
  • Semaphores
  • Used for managing resources by avoiding conflicts
    caused by simultaneous use of a resource
  • Resource semaphore
  • Counting semaphore

RTOSandFile System
12
Task oriented design
  • Benefits
  • Clearer design
  • Polling is avoided
  • Adding a lower priority task will not affect the
    responsiveness of the system to high priority
    tasks
  • Code can be modularized, making things easier to
    maintain and debug
  • Saves power

RTOSandFile System
13
File System features
  • Fail-safe operations
  • The driver makes only atomic actions and takes
    the responsibility that the data managed by the
    file system is always valid.
  • In case of a power loss or a power reset during a
    write operation, it is always assured that only
    valid data is stored in the flash.
  • If the power loss interrupts the write operation,
    the old data will be kept and the block will not
    be corrupted.
  • Wear leveling
  • makes sure that the number of erase cycles
    remains approximately equal for each sector

RTOSandFile System
14
Support
IAR Systems
IAR PowerPac forMSP430
RTOSandFile System
Tools
15
Complete suite of tools
IAR Development Kits
visualSTATE
IAR Embedded Workbench
JTAGdebugger
Verify, Validate, Implement
Compile
Debug
Deploy
Design
Target application
Idea
IAR PowerPac
RTOS Middleware
Tools
16
Support
IAR Systems
IAR PowerPac forMSP430
RTOSandFile System
Tools
17
Why use a commercial RTOS ?
IAR PowerPac forMSP430
Commercial RTOS?
18
IAR PowerPacTM for MSP430
IAR PowerPac forMSP430
  • Fully featured real-time operating system
  • High performance file system
  • Innovative business model similar to that of IAR
    Embedded Workbench
  • Tight integration with IAR Embedded Workbench
  • Easy to get started
  • Board support packages

Additional components
IAR PowerPac USB
IAR PowerPac Source(RTOS File System)
IAR PowerPac Base (RTOS File System)
19
Operating system
IAR PowerPac forMSP430
  • Key features
  • Small memory footprint (1.7 KByte for typical
    MSP430 implementation)
  • Pre-emptive multi-tasking
  • Round-robin scheduling
  • Up to 255 priorities
  • Unlimited number of tasks, semaphores, mailboxes
    and software timers
  • Full interrupt support with nested interrupts
  • Very fast context switch times
  • Power Management

20
RTOS performance
IAR PowerPac forMSP430
21
RTOS performance
IAR PowerPac forMSP430
22
Support for MSP430 Low Power Modes
IAR PowerPac forMSP430
  • Task oriented design is very useful if you want
    to save power
  • Peripherals can be switched of when not used
  • Wake up is possible through all enabled
    interrupts
  • Efficient OS causes minimum CPU overhead -gt
    maximizing idle time -gt reducing power consumption

23
Support for MSP430 Low Power Modes
IAR PowerPac forMSP430
  • PowerPac RTOS fully supports all MSP430 low power
    modes.
  • RTOS always brings CPU into lowest power mode
    possible whenever CPU is idle
  • Peripheral clock requirements are taken into
    account
  • Lifts a lot of the burden for power management
    from the programmer

24
Support for MSP430 Low Power Modes
IAR PowerPac forMSP430
  • The idle task
  • The idle task is only active when no other task
    has something to do.
  • Other tasks need to make operating systems calls
    to let the system know when shared resources are
    or are not in use.
  • OS_POWER_UsageDec(OS_UINT Level)
  • OS_POWER_UsageInc(OS_UINT Level)
  • The idle task will depending on which resources
    are used, enter the lowest possible power mode.

25
IAR PowerPac file system
IAR PowerPac forMSP430
  • Small footprint, e.g. 12 KByte ROM / 1.6 KByte
    RAM
  • MS-DOS/MS-Windows compatible FAT12, FAT16 and
    FAT32 support
  • Multiple device driver support
  • Multiple media support
  • Caching functionality
  • Check disk functionality
  • Device drivers available for a number of media
    types

26
PowerPac File System API layers
IAR PowerPac forMSP430
  • File System API layer
  • - Contains functions in ANSI C stdio style,
    FS_FOpen(), FS_FWrite() etc.
  • - Translates file operations to logical block
    (sector) operations.
  • Storage API layer
  • - Optimized for applications which do not require
    file system functionality.
  • - Allows sector read and write operations to a
    storage medium
  • - A typical application USB mass storage device,
    data has to be stored on a medium, but all file
    system functionality is handled by the host PC.

27
Integration with IAR Embedded Workbench
IAR PowerPac forMSP430
  • Example projects available from the startup
    screen
  • Links to IAR PowerPac for MSP430 documentation in
    the Help menu
  • Template projects within IDE for new library
    projects
  • RTOS aware debugging via C-SPY plug-in
  • Board Support packages

28
IAR PowerPac for MSP430 - evaluation version
IAR PowerPac forMSP430
  • Works with all EW430 product variants with the
    following limitations
  • IAR PowerPac RTOS can either work without a time
    limit with a maximum of three tasks or create
    more than three tasks and work with a time limit
    of 15 minutes.
  • IAR PowerPac File System can only handle one open
    file at any given time
  • Time limited version will also be available

29
IAR PowerPac business model
IAR PowerPac forMSP430
  • Principle
  • Base product in object code format
  • Licensing model
  • Seat license - per developer and CPU
  • Full source code upgrade
  • Group license (up to 20 developers)
  • Site license (unlimited on the same site)
  • No royalty fees
  • Result
  • Low-risk licensing model
  • A license can be used in unlimited number of
    projects and products
  • Affordable site license for unlimited number of
    developers

30
Support
IAR Systems
IAR PowerPac forMSP430
RTOSandFile System
Tools
31
Customer support
Support
  • Support and Update Agreement (SUA)
  • Free software updates
  • First class world-wide technical support by
    telephone, e-mail and fax
  • VIP Support contracts available
  • My Pages at www.iar.com
  • Read about new product releases
  • Download product updates
  • Transfer licenses to co-workers
  • Manage your contact information

32
Technical Resources
Support
  • www.iar.com
  • Tecnical notes
  • Application notes
  • My Pages with latest product updates
  • Documentation
  • User Guides for EW430 and PP430
  • Reference Guides for all EW430 components
  • Reference Guides for PP430 RTOS and FS.

33
Support
IAR Systems
  • Demonstration on MSP-EXP430F5438

IAR PowerPac forMSP430
RTOSandFile System
Tools
34
Summary
  • Our offering
  • A tightly integrated RTOS, file system, and
    tools for developing embedded applications
  • Perfect compliment to IAR Embedded Workbench
  • Innovative low-risk price model
  • Continuous add-ons for more middlewares
  • Upgrade path
  • Same license management system as IAR Embedded
    Workbench
  • Local support across the globe.

35
  • Thank you!

Please send feedback and questions to
support_at_iar.com
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