Tews Technologies TIP815-SW-12 Bedienungsanleitung

TIP815--SW--12

OS--9 Device Driver

for TIP815 ARCNETInterfaceIP

Version1.4

Revision1.1

22 June 1999

TEWSDATENTECHNIKGmbH

AmBahnhof7

D--25469 Halstenbek

Germany

Tel.:+49 (0)4101 4058 0

Fax:+49 (0)4101 4058 19

EMail:Support@tews.com

Web:http://www.tews.com

TIP815--SW--12

ARCNETInterfaceIP

OS--9DeviceDriver

Thisdocumentcontainsinformation,whichisproprietaryto TEWSDATENTECHNIKGmbH.Any

reproduction withoutwrittenpermission isforbidden.

TEWSDATENTECHNIKGmbHhasmade anyeffort toensurethat thismanual isaccurate and

complete.HoweverTEWSDATENTECHNIKGmbHreservestheright tochangetheproduct

describedinthisdocumentatanytimewithoutnotice.

Thisproducthasbeendesignedtooperatewith TEWSDATENTECHNIKGmbH’sTIP815ARCNET

InterfaceIndustryPackrcompatiblemodule.

TEWSDATENTECHNIKGmbHisnotliableforanydamagearisingoutoftheapplicationoruseofthe

softwaredescribedherein.

e1999 byTEWSDATENTECHNIKGmbH

IndustryPack isaregisteredtrademarkof GreenSpringComputers,Inc

1.Introduction 3.........................................

2.Installation 4..........................................

3.I/Ointerfacefunctions 5.................................

3.1.t815_open() 5..............................................

3.2.t815_close() 6..............................................

3.3.t815_read() 7...............................................

3.4.t815_write() 9..............................................

3.5.t815_cntrl() 11...............................................

4.DeviceDescriptor 15.....................................

5.Appendix 16............................................

5.1.Predefined Symbols16........................................

5.2.Statusand ErrorCodes17.....................................

1. Introduction

TheTIP815--SW--12 OS--9devicedriverallowstheoperation oftheTIP815 ARCNETIPwitha

device--independentinterfacewitht815_open,t815_read,t815_writeandt815_cntrlfunctions.

AfterinstallationofthedevicedriverintheI/Osystemmessagescanbetransmittedtoandreceived

fromtheARCNETInterfacebycallingthet815_write() ort815_read() functions.

SpecialI/Ooperation thatdo notfit tothestandardI/Ocallswill beperformed bycallingthe

t815_cntrl() function withaspecificfunction code andan optionalfunction--dependentargument.

Thisdriverinvokeamutualexclusionandqueuingmechanismtopreventsimultaneousrequestsby

multipleusersfrominterferingwitheach other.

2.Installation

TheTIP815--SW--12 OS--9driversoftwareisdeliveredon a 3.5” floppydisc.

Thefloppyhasfollowingcontents:

/d0/tip815/t815driv.cTIP815 devicedriverCsource

/d0/tip815/t815adriv.aTIP815 devicedriverassemblertoC interface

/d0/tip815/t815cif.aTIP815 devicedriverapplication call interface

/d0/tip815/t815stat.aTIP815 devicestaticstorage allocation

/d0/tip815/t815A.aTIP815 devicedescriptorIP- -slotA(MVME162)

/d0/tip815/t815B.aTIP815 devicedescriptorIP- -slotB(MVME162)

/d0/tip815/t815C.aTIP815 devicedescriptorIP- -slotC(MVME162)

/d0/tip815/t815D.aTIP815 devicedescriptorIP- -slotD(MVME162)

/d0/tip815/tip815.hTIP815 application programinclude

/d0/tip815/local.hTIP815 devicedriverinclude

/d0/tip815/ipchip.hMVME162 IPchip definitions

/d0/tip815/arcnet.hARCNETcontrollerprogrammingmodel

/d0/tip815/makefileMakefiletobuildthedriver

Thedistribution containspredefined devicedescriptorsforthefourIP slotsoftheMVME162.

DescriptorAddress VectorLevel

t815A0xfff58000 0x80 1

t815B0xfff58100 0x81 1

t815C0xfff58200 0x82 1

t815D0xfff58300 0x83 1

Afteryou’vecopiedall filesfromthedisk,you havetochoosetheversion ofyourOS--9.Edit the

Makefile andenablethelinesettingtheflagsforyourOS--9version:

$eMakefile

Afteryou choosetheusedOS--9version, thedrivercanbebuildwiththefollowingcommand:

$make

Thedriveranditscorrespondingdevicedescriptorscanbeloadedintotherunningsystemwiththe

command:

$load--dt815drvt815At815Bt815Ct815D

Thedevicedrivermustbeinitializedforeachdevicedescriptorwithacommandlike:

$inizt815A...

AllTIP815I/Osystemcalls(t815_open(),t815_close()andt815_cntrl())canbecalleddirectlyoutof

theC--code application programbyusingtheCcall interface.

To dothisitisnecessarytolinktherelocatableobjectt815cif.rwiththe application program.

Forexample:$cc ... program.ct815cif.r...

3.I/O interface functions

ThischapterdescribestheinterfacetotheI/Osystemusedforcommunication overtheARCNET

Interface.

3.1. t815_open()

NAME

t815_open() - - openapathtoaTIP815 device

SYNOPSIS

int t815_open(DeviceName,PathNr )

char*DeviceName;/*nameofthedeviceto open*/

int*PathNr;/*path number returned bythiscall */

DESCRIPTION

BeforeI/OcanbeperformedtotheTIP815 deviceitmustbeopened byinvokingtheI/O function

t815_open().

Thepath numberisusedtoidentifythedeviceinsubsequentservicerequests.

EXAMPLE

...

/*- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -

openthedevicenamed”/t815A” forI/O

- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -*/

result=t815_open(”/t815A”,&path);

....

RETURNS

returnsE_NOERR(0)ifthedevicewassuccessfulopened,oranappropriateerrorcodeifthedevice

doesnotexist.

SEE ALSO

I/Osystemcall I$Close

3.3. t815_read()

NAME

t815_read() - - readamessagefromspecifiedTIP815 device

SYNOPSIS

int t815_read(PathNr,io_flags,MsgBuf)

intPathNr;/* Path number*/

intio_flags;/*I/O flags:[T815_FLUSH|T815_NOWAIT]*/

T815_MSG*MsgBuf;/* Pointertothemessagebuffer*/

DESCRIPTION

Once a TIP815 devicehasbeen opened, taskscanreadmessagesfromthedevice.

Becausemoreinformationsasthepuredatabytesarerequiredforthereadrequestwehave

designedaspecialI/Odatastructure(T815_MSG).

ThisdatastructurecontainsthereceivedDataPacketwithsource and destination ID,message

lengthandmessagedata.

typedefstruct{

unsignedcharSID;/*Source ID*/

unsignedcharDID;/*DestinationIDor0forbroadcasts */

unsignedshortlen;/*Messagedatalength*/

unsignedchardata[MAX_LONG_MSG];/*Messagedata*/

/*253 bytesforshortpackets */

/*508 bytesforlong packets */

}T815_MSG;

IftheI/OflagT815_FLUSHisset, aflushofthereadringbufferwillbeperformedbeforeactivationof

thereadrequest.

Ifthedeviceisblockedbyanotherreadrequestornomessageisavailableinthereadbufferandthe

I/O flagT815_NOWAITisnotset, therequestingtaskwill beblockeduntil amessagewasread.

Aftersuccessfulcompletion ofareadrequestSIDcontainstheSourceID,DIDcontainsthe

Destination ID,len thenumberofdatabytesanddata[] thereceivedmessage.

EXAMPLE

#include”tip815.h”

{T815_MSGrcvbuf;

intstatus;

intpath;

status=t815_open(”/t815A”,&path);

/*readamessagefromopenedTIP815 device.

oflushtheinputring bufferbeforereading

oreturnimmediatelyifthereisno message available

status=t815_read(path,T815_FLUSH|T815_NOWAIT,&rcvbuf);

if(status== E_NOERR){

/*process message*/

}

else{

/*handledevice error*/

}

RETURNS

E_NOERR ifreadwas successfuloranappropriate errorcode

INCLUDEFILE

tip815.h

3.4. t815_write()

NAME

t815_write() - - write a messagetospecifiedTIP815 device

SYNOPSIS

int t815_write(PathNr,io_flags,MsgBuf)

intPathNr;/* Path number*/

intio_flags;/*I/O flags:[T815_NOWAIT]*/

T815_MSG*MsgBuf;/* Pointertothemessagebuffer*/

DESCRIPTION

Thisroutinewrite a messagetothespecifiedTIP815 device.

Becausemoreinformationsasthepuredatabytesarerequiredforthewriterequestwehave

designedaspecialI/Odatastructure(T815_MSG).

ThisdatastructurecontainstheDataPacketwithsource and destination ID,messagelengthand

messagedata.

typedefstruct{

unsignedcharSID;/*Source ID*/

unsignedcharDID;/*DestinationIDor0forbroadcasts */

unsignedshortlen;/*Messagedatalength*/

unsignedchardata[MAX_LONG_MSG];/*Messagedata*/

/*253 bytesforshortpackets */

/*508 bytesforlong packets */

}T815_MSG;

TheparameterSID isnotused.

TheparameterDIDspecifiestheDestination ID(Destination nodehardware address).

Theparameterlenspecifiesthenumberofdatabytes(data[])tobetransferred.Thenumberofdata

bytesislimitedto253 bytesforshortpacketsand508 bytesforlong packets.

TheonlyvalidI/O flagsetinio_flagsisT815_NOWAIT.If thisflagis set, t815_write() returns

immediatelyafterstartingtransmission,otherwiset815_write()waituntilthemessageistransmitted

andacknowledgedoranerroroccur.

If thedeviceisblocked byan otherwriterequest, therequestingtaskwill beblockeduntil the

transmitterbecomefree ortherequest timesout.

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