MEGA16的W5100以太网模块驱动例程英文

Therapidpenetrationoftheinternetnetworksintomanyoftoday’smodernhomesandpersonalgadgets(e.g.smartphoneandsmartpads)openingatremendoususefulandinterestingembeddedsystemapplicationthatcouldbeintegratedintoourhouseorknownastheintelligenthouse.Forexamplebyputtingasmallembeddedsystemwebserverinourhouse,wecouldeasilymonitorsuchasalarm,temperatureoreventurnon/offthelamporthegarden’swatersprinkle;eventuallyfromanyremotelocationthroughthewirelesspersonalgadget;OrperhapsyoujustwanttoimpressyourrelativeorfriendwithaveryaccuratedigitalclockwhichautomaticallysynchronizedthetimethroughtheNetworkTimeProtocol(NTP)overtheinternetatyourhomeoroffice.

AlloftheseinterestingandchallengingembeddedsystemapplicationscouldbeaccomplishedbyintegratingtheEthernetprotocolwhichisformedthebasicofthecommunicationprotocolusedintheinternetintotheembeddedsystem.Currentlythereareseveralapproachesforthissolutionbutbasicallytheycouldbedividedintotwocategorieswirede.g.WiznetW5100,W5300,MicrochipENC28J60andwirelesssuchastheMicrochipZG2100MCWi-Fimodule(recentlyisacquiredbyMicrochipfromtheZero-GWirelessonJan11,).

OnthistutorialwearegoingtobuildtheembeddedwebserverusingtheWiznetWIZ811MJnetworkmodulewhichisbasedontheWiznetwellknownW5100TCP/IPhardwiredchipthatincludetheethernetcontrollerphysicallayer(PHY).TheWIZ811MJnetworkmodulecomeswiththeWiznetW5100chip,MAG-JACK(RJ45)togetherwiththegluedlogicneededtocommunicatewiththemicrocontrollerthroughtheSPIorbusinterface.

ThereasonIchoosetheWiznet5100basedchiponthistutorialbecausethischiphastheTCP/IPhardwiredonit;thereforeitwillmakedevelopingtheTCP/IPprotocolstackbasedapplicationmucheasierandcouldbeimplementedonthesmallRAMsizemicrocontrollerclasscomparedtothefirmwareTCP/IPprotocolsstackbasedimplementation

approach(youdon’thavetoknoweverythingabouttheTCP/IPprotocolstackinordertobeabletousethischip).TheotherreasonisbecausetheWiznet5100chiphasbeenaroundforafewyearsinthemarketandhasalreadybeingmatured.ThischipisusedinmanycommercialapplicationssuchastheArduinoframeworkontheirstandardArduinoEthernetshieldasshownonthisfollowingpicture.

Ok,nowletslistdownthenecessaryelectronicscomponentsandsupportedsoftwareforthistutorialandmakesureyouhavetheAVRATMega328microcontrollerdatasheetnearyou:

Resistors:10KOhm(1),1KOhm(1)and470Ohm(2)

Capacitors:10uF/16v(2)and0.1uF(2)

LEDS:3mmBlueLED(2)

Transistor:2N3904(1)

VoltageRegulatorIC:LM1086-3.3Volt

Onemomentarypushbutton

One30×60mmPrototypeboard

Two10pinsmaledoubleheaderand5pinsmalesingleheader

One2pinsmalesinglepolarizedheader

AVRJazzMega328boardandJazzMate5Voltvoltageregulatorboardfromermicro

WiznetWIZ811MJNetworkModule

AtmelAVRStudioversion4.17IDE

WinAVRAVR-GCC4.3.2;avr-libc1.6.6(WinAVR0313)

ReferenceDocument:W5100Datasheet,WIZ811MJDatasheet,W5100PortingGuide,AtmelAVRATMega328Datasheet.

TheWiznetW5100HardwiredTCP/IPProtocolChip

BasicallytheWiznetW5100implementsafull-featuredofstandardIEEE802.3(Ethernetphysicalanddatalinklayer)andpowerfulTCP/IPstackinsidethechip;thismaketheWiznetW5100chipissuitablechoiceforintegratingtheembeddedsystemintotheinternet.ProgrammingtheWiznetW5100chipisalsoeasieraswejustneedtowriteandreadtoandfromtheW5100internalregistersinordertousethebuild-inTCP/IPprotocolfeatures.

TheWiznetW5100chipcomewiththreemethodofcontrollingitsinternalregisters;thisfirsttwoistousetheparalleldirectorindirectbus,thelastoneistouseawellknownembeddedserialdatatransferknownastheSPI(serialperipheralinterface),onthistutorialwearegoingtousetheSPItocontroltheWiznetW5100chip.YoucouldreadmoreaboutSPIonmypreviouspostedblogUsingSerialPeripheralInterface(SPI)MasterandSlavewithAtmelAVRMicrocontroller.ThebasicSPIconnectionbetweentheWiznetWIZ811MJnetworkmoduleandAtmelAVRATMega328microcontrollerisshownonthisfollowingpicture.

TheWiznetW5100willactastheSPIslavedevicecontrolledbyAtmelAVRATMega328microcontrollerastheSPIMaster.TheSPIprotocolneedatleastfoursignali.e.MOSI(MasterOutSerialIn),MISO(MasterInSerialOut),SCK(signalclockprovidedbythemaster)andCS(theSPIslavechipselect).AlthoughtheAVRATMega328microcontrollersupportalltheSPImodes(i.e.0,1,2and3)buttheWiznetW5100chipsupportthemostSPIcommonmodes(mode0andmode3)whereitwillsampleadataonrisingedgeclockandoutputtingonthefallingedgeclock.TheW5100chipalsoprovidestheinterruptpin,butonthistutorialwedon’tusetheinterruptfeature,insteadweuseapoolingmethodtocontroltheW5100operation.

InordertounderstandofhowwecontroltheWiznetW5100astheSPIslavedevice,wearegoingtocreatetheW5100initializationprogram;soitwillresponsetothesimple“ping”networkcommand(ICMPprotocol).ThefollowingisthecompleteCcodecalled“wiznetping.c”forinitializingtheWiznetW5100chip.

/*****************************************************************************

// FileName :wiznetping.c

// Version :1.0

// Description :WiznetW5100

// Author :RWB

// Target :AVRJazzMega168Board

// Compiler :AVR-GCC4.3.2;avr-libc1.6.6(WinAVR0313)

// IDE :AtmelAVRStudio4.17

// Programmer :AVRJazzMega168STK500v2.0Bootloader

// :AVRVisualStudio4.17,STK500programmer

// LastUpdated:01July

*****************************************************************************/#include<avr/io.h>

#include<string.h>#include<stdio.h>#include<util/delay.h>

#defineBAUD_RATE19200

//AVRJazzMega168/328SPII/O#defineSPI_PORTPORTB

#defineSPI_DDR DDRB

#defineSPI_CS PORTB2

//WiznetW5100OpCode

#defineWIZNET_WRITE_OPCODE0xF0#defineWIZNET_READ_OPCODE0x0F

//WiznetW5100RegisterAddresses#defineMR 0x0000 //ModeRegister

#defineGAR 0x0001 //GatewayAddress:0x0001to0x0004#defineSUBR0x0005 //SubnetmaskAddress:0x0005to0x0008

#defineSAR 0x0009 //SourceHardwareAddress(MAC):0x0009to0x000E#defineSIPR0x000F //SourceIPAddress:0x000Fto0x0012

#defineRMSR0x001A//RXMemorySizeRegister#defineTMSR0x001B//TXMemorySizeRegistervoiduart_init(void)

{

UBRR0H=(((F_CPU/BAUD_RATE)/16)-1)>>8; //setbaudrateUBRR0L=(((F_CPU/BAUD_RATE)/16)-1);

UCSR0B=(1<<RXEN0)|(1<<TXEN0); //enableRx&TxUCSR0C= (1<<UCSZ01)|(1<<UCSZ00); //configUSART;8N1

}

voiduart_flush(void)

{

unsignedchardummy;

while(UCSR0A&(1<<RXC0))dummy=UDR0;

}

intuart_putch(charch,FILE*stream)

{

if(ch=='\n')uart_putch('\r',stream);

while(!(UCSR0A&(1<<UDRE0)));UDR0=ch;

return0;

}

intuart_getch(FILE*stream)

{

unsignedcharch;

while(!(UCSR0A&(1<<RXC0)));ch=UDR0;

/*EchotheOutputBacktoterminal*/uart_putch(ch,stream);

returnch;

}

voidansi_cl(void)

{

//ANSIclearscreen:cl=\E[H\E[Jputchar(27);

putchar('[');

putchar('H');putchar(27);putchar('[');

putchar('J');

}

voidansi_me(void)

{

//ANSIturnoffallattribute:me=\E[0mputchar(27);

putchar('[');

putchar('0');

putchar('m');

}

voidSPI_Write(unsignedintaddr,unsignedchardata)

{

//ActivatetheCSpinSPI_PORT&=~(1<<SPI_CS);

//StartWiznetW5100WriteOpCodetransmissionSPDR=WIZNET_WRITE_OPCODE;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//StartWiznetW5100AddressHighBytestransmissionSPDR=(addr&0xFF00)>>8;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//StartWiznetW5100AddressLowBytestransmissionSPDR=addr&0x00FF;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//StartDatatransmissionSPDR=data;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//CSpinisnotactiveSPI_PORT|=(1<<SPI_CS);

}

unsignedcharSPI_Read(unsignedintaddr)

{

//ActivatetheCSpinSPI_PORT&=~(1<<SPI_CS);

//StartWiznetW5100ReadOpCodetransmissionSPDR=WIZNET_READ_OPCODE;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//StartWiznetW5100AddressHighBytestransmissionSPDR=(addr&0xFF00)>>8;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//StartWiznetW5100AddressLowBytestransmissionSPDR=addr&0x00FF;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//SendDummytransmissionforreadingthedataSPDR=0x00;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//CSpinisnotactiveSPI_PORT|=(1<<SPI_CS);

return(SPDR);

}

voidW5100_Init(void)

{

//EthernetSetup

unsignedcharmac_addr[]={0x00,0x16,0x36,0xDE,0x58,0xF6};unsignedcharip_addr[]={192,168,2,10};

unsignedcharsub_mask[]={255,255,255,0};unsignedchargtw_addr[]={192,168,2,1};

//SettingtheWiznetW5100ModeRegister:0x0000SPI_Write(MR,0x80); //MR=0b10000000;

_delay_ms(1);

printf("ReadingMR:%d\n\n",SPI_Read(MR));

//SettingtheWiznetW5100GatewayAddress(GAR):0x0001to0x0004printf("SettingGatewayAddress%d.%d.%d.%d\n",gtw_addr[0],gtw_addr[1],\

gtw_addr[2],gtw_addr[3]);SPI_Write(GAR+0,gtw_addr[0]);SPI_Write(GAR+1,gtw_addr[1]);SPI_Write(GAR+2,gtw_addr[2]);SPI_Write(GAR+3,gtw_addr[3]);

_delay_ms(1);

printf("ReadingGAR:%d.%d.%d.%d\n\n",SPI_Read(GAR+0),SPI_Read(GAR+1),\SPI_Read(GAR+2),SPI_Read(GAR+3));

//SettingtheWiznetW5100SourceAddressRegister(SAR):0x0009to0x000Eprintf("SettingSourceAddress%.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",mac_addr[0],mac_addr[1],\

mac_addr[2],mac_addr[3],mac_addr[4],mac_addr[5]);SPI_Write(SAR+0,mac_addr[0]);

SPI_Write(SAR+1,mac_addr[1]);SPI_Write(SAR+2,mac_addr[2]);SPI_Write(SAR+3,mac_addr[3]);SPI_Write(SAR+4,mac_addr[4]);SPI_Write(SAR+5,mac_addr[5]);

_delay_ms(1);

printf("ReadingSAR:%.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n\n",SPI_Read(SAR+0),SPI_Read(SAR+1),\

SPI_Read(SAR+2),SPI_Read(SAR+3),SPI_Read(SAR+4),SPI_Read(SAR+5));

//SettingtheWiznetW5100SubMaskAddress(SUBR):0x0005to0x0008printf("SettingSubMaskAddress%d.%d.%d.%d\n",sub_mask[0],sub_mask[1],\

sub_mask[2],sub_mask[3]);SPI_Write(SUBR+0,sub_mask[0]);SPI_Write(SUBR+1,sub_mask[1]);SPI_Write(SUBR+2,sub_mask[2]);SPI_Write(SUBR+3,sub_mask[3]);

_delay_ms(1);

printf("ReadingSUBR:%d.%d.%d.%d\n\n",SPI_Read(SUBR+0),SPI_Read(SUBR+1),\SPI_Read(SUBR+2),SPI_Read(SUBR+3));

//SettingtheWiznetW5100IPAddress(SIPR):0x000Fto0x0012printf("SettingIPAddress%d.%d.%d.%d\n",ip_addr[0],ip_addr[1],\

ip_addr[2],ip_addr[3]);SPI_Write(SIPR+0,ip_addr[0]);SPI_Write(SIPR+1,ip_addr[1]);

SPI_Write(SIPR+2,ip_addr[2]);SPI_Write(SIPR+3,ip_addr[3]);

_delay_ms(1);

printf("ReadingSIPR:%d.%d.%d.%d\n\n",SPI_Read(SIPR+0),SPI_Read(SIPR+1),\SPI_Read(SIPR+2),SPI_Read(SIPR+3));

//SettingtheWiznetW5100RXandTXMemorySize,weuse2KBforRx/Tx4channelsprintf("SettingWiznetRMSRandTMSR\n\n");

SPI_Write(RMSR,0x55);

SPI_Write(TMSR,0x55);

printf("DoneWiznetW5100Initialized!\n");

}

//AssignI/OstreamtoUART

FILEuart_str=FDEV_SETUP_STREAM(uart_putch,uart_getch,_FDEV_SETUP_RW);intmain(void){

//SetthePORTDasOutput:

DDRD=0xFF;

PORTD=0x00;

//DefineOutput/InputStreamstdout=stdin=&uart_str;

//InitialUARTPeripheraluart_init();

//ClearScreenansi_me();ansi_cl();ansi_me();ansi_cl();uart_flush();

//InitialtheAVRATMega168/328SPIPeripheral

//SetMOSI(PORTB3),SCK(PORTB5)andPORTB2(SS)asoutput,othersasinputSPI_DDR=(1<<PORTB3)|(1<<PORTB5)|(1<<PORTB2);

//CSpinisnotactiveSPI_PORT|=(1<<SPI_CS);

//EnableSPI,MasterMode0,settheclockratefck/2SPCR=(1<<SPE)|(1<<MSTR);

SPSR|=(1<<SPI2X);

//InitialtheWiznetW5100printf("WiznetW5100Init\n\n");W5100_Init();

//Loopforever

for(;;){

}

return0;

}

/*EOF:wiznetping.c*/

AftercompilinganddownloadingtheHEXprogramintotheAVRJazzMega328board;connecttheRJ45connectorUTPethernetcabletoyourhubs/switchoryoucouldconnectdirectlywiththecrossconfigurationcabletoyourcomputer.UsetheserialterminalsuchasHyperterminal,puTTYorTeraTermandconfigureittoaccepttheserialconnectionwith19200baudrate,8-bitdatawithNoParityCheck.

NowyouarereadytotestyourfirstembeddedEthernetbyusingthe“ping”commandasshownonthesefollowingpictures:

WiznetW5100SPIInitialization

ToinitializetheW5100chip,weneedtowriteoneachoftheW5100commonregistersnamedMR(ModeRegister),SUBR(SubnetmaskRegister),SAR(SourceHardwareRegister),SIPR(SourceIPRegister),RMSR(ReceiveMemorySizeRegister)andTMSR(TransmitMemorySizeRegister).

AlltheWiznetW5100registersaddresshas16-bitswideandtheregisteritselfis8-bitswide;becauseweuse8-bitAVRATMega328microcontrollerSPI,thereforeinordertoperformwriteorreadoperationweneedtopassthefirst8-bitMSB(mostsignificantbyte)andfollowbythe8-bitLSB(leastsignificantbyte)oftheW5100registeraddress.TheWiznetW5100alsousetwooperantcommandstodifferentiatebetweentheWRITE(0xF0)andREAD(0×0F)

operation.TheWiznetW5100SPIwriteandreadroutineisimplementedintheSPI_Write()andSPI_Read()

functionsontheaboveCcode.

TheSARregistersisalsoknownastheMAC(MediaAccessControl)address,thisW5100registerwillrepresenttheuniquehardwareidentificationinthenetwork.TheMACaddressisassignedandmanagedbyInstituteofElectricalandElectronicsEngineers(IEEE)foreachNIC(NetworkInterfaceCard)manufacturerwherethefirst3bytesof6bytesMACaddressisusedtoidentifytheorganizationthatissuedtheidentifierandareknownastheOUI(OrganizationallyUniqueIdentifier).ForexamplethefollowingarethelistofAtmel,MicrochipandWiznetOUI:

00-04-25

(hex)

AtmelCorporation

000425

(base

16)

AtmelCorporation

Multimedia&CommunicationsGroup

2200GatewayCentre,Suite201

MorrisvilleNC27560

UNITEDSTATES

00-04-A3

(hex)

MicrochipTechnology,Inc.

0004A3

(base

16)

MicrochipTechnology,Inc.

2355W.ChandlerBlvd.

ChandlerAZ85224

UNITEDSTATES

00-08-DC

(hex)

Wiznet

0008DC

(base

16)

Wiznet

5FSimmtechbldg.,228-3,

Nonyhun,Kangnam

Seoul 135-830

KOREA,REPUBLICOF

NowthequestionishowyoucouldgetyourownMACaddressbecausetheWiznetW5100chipisshippedwithoutitsownMACaddress;theanswerisyoucouldeitherregisteryourownMACaddress(OUI)toIEEE(ofcoursethisisnotrecommendedforthehobbyistasthiswillbeveryexpensiveunlessyoucouldeffortit)oryoucouldsimplyuseyourowncomputerNIC’sMACaddressandjustchangethelastbyteofthe6byteMACaddressandcrossyoufinger,hoppingthisMACaddresswillbeuniquewithinyournetworkasIdid.Byusingthe“ipconfig/all”commandinthewindowcommandprompt,youcouldgettheinformationofyourcomputerMACaddressinhexnotationi.e.

00-16-36-DE-58-F5(theMACaddressofmycomputer);nowbyaddingonetothelastbyteyouwillgettheW5100MACaddressthatIusedinthistutorial(00-16-36-DE-58-F6).

TheWiznetW5100supportuptofoursimultaneouschannelsorsockets,eachofthechannelshasitsownregistersaddresstocontroltheoperation.Allofthesechannelsissupportedby8KBmemoryofthetransmitbufferand8KBmemoryofthereceivebuffer.WecouldadjustthismemorysizeoneachchannelbyassigningtheRMSRandTMSRregister(thedefaultis2KBforeachchannel)asshownonthisfollowingCcode:

//SettingtheWiznetW5100RXandTXMemorySize,weuse2KBforRx/Tx4channelsprintf("SettingWiznetRMSRandTMSR\n\n");

SPI_Write(RMSR,0x55);

SPI_Write(TMSR,0x55);

AlltheW5100initializationroutineisimplementedinW5100_Init()function,whereweperformbothwritingandreadinginordertounderstandhowwecouldcontroltheW5100registerthroughtheSPI.ThefollowingisthesummaryofhowweinitializedtheW5100register.ForthecompleteinformationabouttheW5100registerspleaserefertotheWiznetW5100datasheet(consideritasyourbestfriendinthistutorial):

Write0×80toW5100MR(ModeRegister)onaddress:0×0000tosoftresetthechip

AssignfourbytesofthegatewayIPaddresstotheW5100GAR(GatewayAddressRegister)onaddress0×0001to0×0004

AssignfourbytesofthesubmaskaddresstotheW5100SUBR(SubMaskAddressRegister)onaddress0×0005to0×0008

AssignsixbytesoftheMACaddresstotheW5100SAR(SourceAddressRegister)onaddress0×0009to0×000E

AssignfourbytesoftheIPaddresstotheW5100SIPR(SourceIPRegister)onaddress0×000Fto0×0012

ThelastistoallocatethetransmitandreceivebuffersizetoeachofRMSR(RXMemorySizeRegister)address:0×001AandTMSR(TXMemorySizeRegister)onaddress0×001B.

Becauseweusethedefaultvalue0×07D0(200ms,where1mean100us)oftheRTR(RetryTimeValueRegister)anddefaultvalue0×08(8timesretrybeforegeneratinginterrupt)oftheRCR(RetryCountRegister),thereforewedon’tneedtosettheseregisters

AfterperformingalltheW5100requiredinitializationroutineyoucouldexaminewhetheritworkornotbysendingthe“ping”commandtotheW5100buildinICMP(InternetControlMessageProtocol)packageresponder.Ifeverythingworks,thenyouwillgettheICMPreplyfromtheWiznetW5100chip.Withthisunderstandingnowwearereadytocontinuethistutorialandmakeourfirstsimpleembeddedwebserver.

TheEmbeddedWebServer

TheadvantageofusingtheHypertextTransferProtocol(HTTP)serverintheembeddedsystemis;youdon’thavetodevelopaspecialclientapplicationtocommunicatewithyourembeddedsystem.Allyouneedistouseanystandardbrowserthatcomeswithyourpersonalcomputeroperatingsystemorgadgettotalktoyourembeddedsystem.TheHTTPserverusesasimpletextcalledHypertextMarkupLanguage(HTML)tointeractwiththebrowser(clientapplication)throughtheTCP/IPprotocol.

TheHTTPserverworkbylisteningtoanyrequestfromtheclient(browser)foranyHTTP“GET”or“POST”requestthroughtheTCP/IPport80(standardHTTPserverport).OncetheclientsendsthisrequesttotheHTTPserver,thentheHTTPserverwillresponsetothisclientrequestbysendingtheHTTPresponseheader(HTTP/1.0200OKandContent-Type:text/html)followbytheblanklineandtheHTMLtexttotheclient,aftertransferalltheHTMLtexttotheclient;theHTTPserverwillautomaticallydisconnecttheestablishedconnectionwiththeclient.ThefollowingistheexampleoftheclientrequestandtheHTMLtextresponsetransmittedbytheembeddedHTTPserver:

ClientRequest:

GET/HTTP/1.1Host:01

User-Agent:Mozilla/5.0(Windows;U;WindowsNT5.1;en-US;rv:)Gecko/20100401Firefox/3.6.3

Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8Accept-Language:en-us,en;q=0.5

Accept-Encoding:gzip,deflate

Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.7Keep-Alive:115

Connection:keep-alive

HTTPServerResponse:

HTTP/1.0200OK

Content-Type:text/html

<html>

<body>

<spanstyle="color:#0000A0">

<h1>EmbeddedWebServer</h1>

<h3>AVRJazzMega328andWIZ811MJ</h3>

<p><formmethod="POST">

<strong>Temp:<inputtype="text"size=2value="26">^OC

<p><inputtype="radio"name="radio"value="0">BlinkingLED

<br><inputtype="radio"name="radio"value="1"checked>ScanningLED

</strong><p>

<inputtype="submit">

</form></span>

</body>

</html>

TheclientthenwilltranslatethisreceivedHTMLtextanddisplaytheinformationonthebrowserscreensuchasroom’stemperatureandtheoutputLEDstatus.BysubmittingdifferentLEDsettingfromthebrowser(POSTrequest)totheHTTPserver,nowwecouldeasilygivetheneededinstructiontotheAVRATMega328microcontrollerthatalsofunctionedastheembeddedwebserver.

NowasyouunderstandthebasicprincipalofhowtheHTTPserverprotocolwork,itstimetoimplementitontheAVRATMega328MicrocontrollerandWiznetW5100chip.ThefollowingisthecompleteCcodecalled“wiznetweb.c”forourembeddedwebserver:

/*****************************************************************************

// FileName :wiznetweb.c

// Version :1.0

// Description :AVRJazzMega328andWiznetW5100WebServer

// Author :RWB

// Target :AVRJazzMega328Board

// Compiler :AVR-GCC4.3.2;avr-libc1.6.6(WinAVR0313)

// IDE :AtmelAVRStudio4.17

// Programmer :AVRJazzMega328STK500v2.0Bootloader

// :AVRVisualStudio4.17,STK500programmer

// LastUpdated:20July

*****************************************************************************/#include<avr/io.h>

#include<string.h>#include<stdio.h>#include<util/delay.h>#include<avr/interrupt.h>

#include<avr/pgmspace.h>

//AVRJazzMega328SPII/O#defineSPI_PORTPORTB#defineSPI_DDR DDRB#defineSPI_CS PORTB2

//WiznetW5100OpCode

#defineWIZNET_WRITE_OPCODE0xF0#defineWIZNET_READ_OPCODE0x0F

//WiznetW5100RegisterAddresses

#define

MR

0x0000

//

ModeRegister

#define

GAR

0x0001

//

GatewayAddress:0x0001to0x0004

#define

SUBR

0x0005

//

SubnetmaskAddress:0x0005to0x0008

#define

SAR

0x0009

//

SourceHardwareAddress(MAC):0x0009to0x000E

#define

SIPR

0x000F

//

SourceIPAddress:0x000Fto0x0012

#define

RMSR

0x001A

//

RXMemory

SizeRegister

#define

TMSR

0x001B

//

TXMemory

SizeRegister

#define

S0_MR

0x0400

//

Socket0:

ModeRegisterAddress

#define

S0_CR

0x0401

//

Socket0:

CommandRegisterAddress

#define

S0_IR

0x0402

//

Socket0:

InterruptRegisterAddress

#define

S0_SR

0x0403

//

Socket0:

StatusRegisterAddress

#define

S0_PORT

0x0404

//

Socket0:

SourcePort:0x0404to0x0405

#define

SO_TX_FSR

0x0420

//

Socket0:

TxFreeSizeRegister:0x0420to0x0421

#define

S0_TX_RD

0x0422

//

Socket0:

TxReadPointerRegister:0x0422to0x0423

#define

S0_TX_WR

0x0424

//

Socket0:

TxWritePointerRegister:0x0424to0x0425

#defineS0_RX_RSR 0x0426 //Socket0:RxReceivedSizePointerRegister:0x0425to0x0427#defineS0_RX_RD 0x0428 //Socket0:RxReadPointer:0x0428to0x0429

#defineTXBUFADDR 0x4000 //W5100SendBufferBaseAddress#defineRXBUFADDR 0x6000 //W5100ReadBufferBaseAddress

//S0_MRvalues

#define

MR_CLOSE

0x00

//

Unusedsocket

#define

MR_TCP

0x01

//

TCP

#define

MR_UDP

0x02

//

UDP

#define

MR_IPRAW

0x03

//

IPLAYERRAWSOCK

#define

MR_MACRAW

0x04

//

MACLAYERRAWSOCK

#define

MR_PPPOE

0x05

//

PPPoE

#define

MR_ND

0x20

//

NoDelayedAck(TCP)flag

#define

MR_MULTI

0x80

//

supportmulticating

//S0_CRvalues

#define

CR_OPEN

0x01

//

Initializeoropensocket

#define

CR_LISTEN

0x02

//

Waitconnectionrequestintcpmode(Server

mode)

#define

CR_CONNECT

0x04

//

Sendconnectionrequestintcpmode(Clientmode)

#define

CR_DISCON

0x08

//

Sendclosingreqeusetintcpmode

#define

CR_CLOSE

0x10

//

Closesocket

#define

CR_SEND

0x20

//

UpdateTxmemorypointerandsenddata

#define

CR_SEND_MAC

0x21

//

SenddatawithMACaddress,sowithoutARPprocess

#define

CR_SEND_KEEP

0x22

//

Sendkeepalivemessage

#defineCR_RECV 0x40 //UpdateRxmemorybufferpointerandreceivedata

//S0_SRvalues

#define

SOCK_CLOSED

0x00

//Closed

#define

SOCK_INIT

0x13

//Initstate

#define

SOCK_LISTEN

0x14

//Listenstate

#define

SOCK_SYNSENT

0x15

//Connectionstate

#define

SOCK_SYNRECV

0x16

//Connectionstate

#define

SOCK_ESTABLISHED

0x17

//Successtoconnect

#define

SOCK_FIN_WAIT

0x18

//Closingstate

#define

SOCK_CLOSING

0x1A

//Closingstate

#define

SOCK_TIME_WAIT

0x1B

//Closingstate

#define

SOCK_CLOSE_WAIT

0x1C

//Closingstate

#define

SOCK_LAST_ACK

0x1D

//Closingstate

#define

SOCK_UDP

0x22

//UDPsocket

#define

SOCK_IPRAW

0x32

//IPrawmodesocket

#define

SOCK_MACRAW

0x42

//MACrawmodesocket

#define

SOCK_PPPOE

0x5F

//PPPOEsocket

#define

TX_BUF_MASK

0x07FF

//Tx2KBufferMask:

#define

RX_BUF_MASK

0x07FF

//Rx2KBufferMask:

#define

NET_MEMALLOC

0x05

//Use2KofTx/RxBuffer

#define

TCP_PORT

80

//TCP/IPPort

//DebuggingMode,0-DebugOFF,1-DebugON#define_DEBUG_MODE 0

#if_DEBUG_MODE

#defineBAUD_RATE19200#endif

//DefineW5100SocketRegisterandVariablesUseduint8_tsockreg;

#defineMAX_BUF512uint8_tbuf[MAX_BUF];inttempvalue;

uint8_tledmode,ledeye,ledsign;#if_DEBUG_MODE

voiduart_init(void)

{

UBRR0H=(((F_CPU/BAUD_RATE)/16)-1)>>8; //setbaudrateUBRR0L=(((F_CPU/BAUD_RATE)/16)-1);

UCSR0B=(1<<RXEN0)|(1<<TXEN0); //enableRx&TxUCSR0C= (1<<UCSZ01)|(1<<UCSZ00); //configUSART;8N1

}

voiduart_flush(void)

{

unsignedchardummy;

while(UCSR0A&(1<<RXC0))dummy=UDR0;

}

intuart_putch(charch,FILE*stream)

{

if(ch=='\n')uart_putch('\r',stream);

while(!(UCSR0A&(1<<UDRE0)));UDR0=ch;

return0;

}

intuart_getch(FILE*stream)

{

unsignedcharch;

while(!(UCSR0A&(1<<RXC0)));ch=UDR0;

/*EchotheOutputBacktoterminal*/uart_putch(ch,stream);

returnch;

}

voidansi_cl(void)

{

//ANSIclearscreen:cl=\E[H\E[Jputchar(27);

putchar('[');

putchar('H');putchar(27);putchar('[');

putchar('J');

}

voidansi_me(void)

{

//ANSIturnoffallattribute:me=\E[0mputchar(27);

putchar('[');

putchar('0');

putchar('m');

}

#endif

voidSPI_Write(uint16_taddr,uint8_tdata)

{

//ActivatetheCSpinSPI_PORT&=~(1<<SPI_CS);

//StartWiznetW5100WriteOpCodetransmissionSPDR=WIZNET_WRITE_OPCODE;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//StartWiznetW5100AddressHighBytestransmissionSPDR=(addr&0xFF00)>>8;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//StartWiznetW5100AddressLowBytestransmissionSPDR=addr&0x00FF;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//StartDatatransmissionSPDR=data;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//CSpinisnotactiveSPI_PORT|=(1<<SPI_CS);

}

unsignedcharSPI_Read(uint16_taddr)

{

//ActivatetheCSpinSPI_PORT&=~(1<<SPI_CS);

//StartWiznetW5100ReadOpCodetransmissionSPDR=WIZNET_READ_OPCODE;

//Waitfortransmissioncomplete

while(!(SPSR&(1<<SPIF)));

//StartWiznetW5100AddressHighBytestransmissionSPDR=(addr&0xFF00)>>8;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//StartWiznetW5100AddressLowBytestransmissionSPDR=addr&0x00FF;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//SendDummytransmissionforreadingthedataSPDR=0x00;

//Waitfortransmissioncompletewhile(!(SPSR&(1<<SPIF)));

//CSpinisnotactiveSPI_PORT|=(1<<SPI_CS);

return(SPDR);

}

voidW5100_Init(void)

{

//EthernetSetup

unsignedcharmac_addr[]={0x00,0x16,0x36,0xDE,0x58,0xF6};uns