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What are the pressures facing embeddeddevelopers today ? The acceleration oftime-to-revenue pressure ? Increasinglycomplex designs because of higherdensities, not to mention increasingclock frequencies ? Lack of available
development engineers?
you need to do is make the hardwarework. This involves some basic resourcecontrol and software features, typicallyprovided by kernels and operating sys-tems.
can focus on the development of yourvalue-added components, as well as theintegration and packaging of your hard-ware. At the same time, your softwareengineers can begin to develop yourapplication software and focus on your
product's required functionality.You now have three choices. One, youcan integrate this control into your appli-cation. Two, you can write or port yourown proprietary, homegrown kernel.Three, you can write a board supportpackage (BSP) for a commercial real-time operating system (RTOS).
All of these factors and more make itdifficult for managers to deliver therequired functionality and bring theirprojects in on time. In this article, Davepaves a smoother road for developersby reviewing the many off-the-shelfoptions that are available.
One such off -the-shelf hardware solutionis the MBX Embedded Controller fromthe Motorola Computer Group. (For ablock diagram and details on the MBX,refer to the sidebar on page 17)
As a commercially available board tar-geted at OEM designs, the MBX board(pictured in Figure I) has gained wideacceptance with the embedded softwarevendors. Because of this popularity,you'll also find a wide variety of off-the-shelf kernels, RTOSs, and developmenttools that either run on or work with theMBX (refer to the table in Figure 2).
Option number one is probably not fea-sible for a complex embedded controlleror single board computer design. Withoptions two and three, by the time youfinish porting your own proprietary ker-nel or writing a BSP for a commercialkernel, you still haven't added any valuefor your company. In other words, youstill have to develop your application, andthe clock is still ticking.
Dave looks at the software impact andhidden costs of using proprietaryhardware versus the advantages ofusing off-the-shelf hardware, such asthe MBX Embedded Controller: Inaddition, he explores the wealth ofsoftware tools and real-time operatingsystems available for the MBX off-the-shelf solution.
Keep in mind that your company expectsyour product to reach the market in ninemonths! It no longer seems possible. Isthere any way to make it happen? Thismay be a typical scenario, but it doesn'thave to be the way your next MPC860development project plays out.
Development in the fast laneToday, a typical scenario might go some-thing like this. Your company needsto have its next-generation Power PCMPC860-based product to market in ninemonths. You have in-house design capa-bilities; and traditionally, you havedesigned and built your own boards.
Taking a smoother roadYes, there is a way you can make it hap-pen: you can rewrite the script. It requiresthat you rethink the way you developproducts and re-evaluate your value-add.Is it best to use your scarce engineeringresources to design and build embeddedcontrollers and the controlling software?Could your company be better served byusing those same resources to focus onyour core competency, providing the fea-tures needed to give your product a com-petitive advantage and meet or evenexceed your time-to-revenue goals?
Your hardware group says that it will takesix months to provide you with workingprototype hardware. They've explainedto you that the MPC860 is a complexdevice, and it won't be easy for them tobuild a working board. After all, they aredealing with a total of 357 pins in a ballgrid array package with a manual that'sover 1,100 pages.
Figure 1
Accelerated Technology
Nucleus PLUS
Accelerated Technology's Nucleus BSP
for the MBX supports:
After this conversation, you are not feel-ing very confident that they are going tobe able to deliver anything in six months.At best calculation, you'll have less thanthree months to develop a working appli-cation. You've seen this movie before, andyou don't like the ending.
If your company weighs time-to-marketmore heavily than other criteria, thenusing off-the-shelfhardware and softwarecan be the key to success. With off-the-shelf components, you can meet yourproject and company goals, literally start-ing the development of your applicationfrom day one. Your hardware engineers
Serial on SMCl and SMC2 (Serial
Management Controller)Ethernet on the SCCl (Serial Commu-nication Controller)PCMCIA ( via third-party partner Tech-
nology Rendezvous, Inc.)LCD support (MBX82l board)
Regardless of when you are able to startyour software development, the first thing
The deve]opment environment for
Nuc]eus is Windows 95 or Windows
PC/104 Embedded Solutions -Winter 1998 -11
The following are brief descriptions of thesoftware and d~velopment tool support onthe MBX board.
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.Flash driversTwo add-on packages are available on theMBX. The mwSoftStax package providesflexible networking support, and themwMAUI package provides an abstractedmultimedia support using either an LCDpanel or a VGA display.
In addition. ATM support is providedthrough a relationship with Trillium. TheLynxOS development environment can behosted on Solaris or WindowsNT.
Microware provides the FasTrak Inte-grated Development Environment hostedon Windows. FasTrak includes:
Microtec VRTX, X RAY Debugger
and C/C++ Compilers
The Microtec product family includes:
.Codewright Editor/Project Manager
.FasTrak Debugger
.Ultra C/C++ Compiler
.VRTX RTOS
.X RAY Debugger
.Microtec C and C++ Compilers
one~o~i~nFasTrak is upgradable to Microware'snew development environment known asHawk at no additional charge. Hawk pro-vides an integrated, intuitive, easy-to-use, project-manager style format andsearnlessly integrates the Codewright Edi-tor/Project Manager, Debugger, and UltraC/C++ Compiler. Hawk is an open envi-ronment that allows for plug-and-playtools available from Hawk Partners suchas Applied Microsystems, Microtec (adivision of Mentor Graphics), Diab Data,Western Wares, Metrowerks, and EST.
These products may be used individuallyor together as an integrated developmentenvironment solution for embedded ap-plications using Motorola ComputerGroup's MBX860/82I board.
VRTX, versions 4.2 and 4.3, providesMBX support with a BSP that includes:
.SMC serial
.Ethernet
.Timer support
Integrated cornrnunications is supportedwith configurable add-on componentssuch as SNX for TCP- IP networking andIFX for file system I/O.
Microware Java for OS-9 is also availablefor the MBX platform. The MicrowareJava for OS-9 Starter Kit provides com-plete graphics support using Microware'smwMAUI, integrated and tested thor-oughly with the MBX LCD display,and complete networking supportusing Microware's mwSoftStax. TheMicroware Java for OS-9 Starter Kitincludes the Microware OS-9 for MBXsoftware package, so all the user needsto get started is a PC host system andan MBX board with a hard disk drive.
The VRTX Development System (hostedon HP-UX, Solaris, and Windows 95/NT)includes the X RAY Debugger. X RAY hasthe ability to do builds, makes and edit-ing within the debugger. It provides thecapability to connect to the MBX boardusing either serial or Ethernet, and sup-ports advanced debugging of complexmultitasking and multiprocessing applica-tions. In addition, X RAY BDM providesa simple on-chip debugging solution forconnecting to the MBX board.
Sun Microsystems ChorusOSTM
The ChorusOS operating system (from
Sun Microsystems) runs on the MBX
board.Microware 05-9, FasTrak,Hawk, and Java for 05-9Microware provides support for the MBXin 05-9 version 2.1.1. The MBX B5P in-cludes support for:
Technology Rendezvous, Inc.(TRI) PCMCIA SupportTechnology Rendezvous, Inc. (TRI) pro-vides PCMCIA support for the pSOS+,VxWorks, and Nucleus RTOSs. The TRIPCMCIA stack provides a layered stackfor embedded applications that requirePCMCIA access. The stack has socketand card service layers conforming toPCMCIAIJEIDA standards. Key featuresof the stack are:
current project,please contact us at 800/545;;2980 or
~~
r~ ~7.. /'4/)\ " ::" ,,1 vll
.hot plug (live insertion or hot swap)
capability.plug-and-play.support for Type I, II & III cards
TRI provides client drivers for:
,
.MMU
.Bus monitor
.Watchdog timer
.Interval timer
.Real-time clock
.DIMM memory
.Console port
.SCC2, SCC3, SCC4, SMC2
.Ethernet (IOBaseT or AUI)
.PCMCIA
.LCD (MBX821)
.MBX8xx bus interface
.ErnE and floppy disk controllers
.Parallel port
.QSPAN
.PC/104 and PC/IO4-Plus.Ethernet
.Wireless moderns
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