C8051F310 SMBus 调试OKWord文件下载.docx

C8051F310 SMBus 调试OKWord文件下载.docx

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CKCON|=0x04;

//定时器0使用系统时钟

TH0=0xEC;

//400k/s400kHZ

EIE1=0x01;

//EnableSMBusinterrupt允许SMB0的中断请求

SMB0CF|=0xD0;

//EnableSMBusand允许SDA建立和保持时间扩展禁止从方式

SMB0CN|=0x80;

//SMBus工作在主方式

TR0=1;

//Enabletimer1

}

voidTimer3_Init（void）

TMR3RLL=0x9F;

//Timer3willoverflowat25ms

TMR3RLH=0x38;

EIE1|=0x80;

//Enabletimer3interrupt允许TF3L或TF3H标志的中断请求

TMR3CN=0x04;

//使能定时器3

//------------------------------------------------------------------------------------

//Timer3InterruptServiceRoutine（ISR）

//

//ATimer3interruptindicatesanSMBusSCLlowtimeout.

//TheSMBusisdisabledandre-enabledhere

voidTimer3_ISR（void）interrupt14

SMB0CF&

=~0x80;

//禁止SMBus

SMB0CF|=0x80;

//重新启动SMBus

TMR3CN&

//中断标志清零

//SMBusInterruptServiceRoutine（ISR）SMB0DAT存放地址的

//SMBusISRstatemachine

//-Masteronlyimplementation-noslaveorarbitrationstatesdefined

//-Allincomingdataiswrittenstartingattheglobalpointer<

pSMB_DATA_IN>

//-Alloutgoingdataisreadfromtheglobalpointer<

pSMB_DATA_OUT>

voidSMBus_ISR（void）interrupt7

bitFAIL=0;

//UsedbytheISRtoflagfailed

//transfers

//numberofdatabytessentor

//received

staticbitSEND_START=0;

//Sendastart

switch（SMB0CN&

0xF0）//Statusvector高四位&

上不变低四位都为零

{

//MasterTransmitter/Receiver:

STARTconditiontransmitted.

caseSMB_MTSTA:

//【送器件地址】//开始传送case是0xE0

SMB0DAT=（TARGET|SMB_RW）;

//Loadaddressofthetargetslave

//0XA1

//SMB0DAT|=SMB_RW//LoadR/Wbit

STA=0;

//ManuallyclearSTARTbitSTA：

SMBus起始标志

i=0;

//resetdatabytecounter

break;

/*为什么一开始第一步EEPROM_ByteRead（）就要返回值？

结果到最后temp里有值却不返回*/

/*按照每个地址存一个一不应该下下移啊找的原因了*/

//MasterTransmitter:

Databyte（orSlaveAddress）transmitted

caseSMB_MTDB:

//case是0xC0//（MT）数据字节传送SMB0CN：

SMBus控制寄存器

if（ACK）/*时序上是低电平这个也可能是原因*///SlaveAddressorDataByte接收到“确认”

{//Acknowledged?

if（SEND_START）//

{/*按照时序应答之后开始根据程序的话会先进入判断之后再开始*/

STA=1;

//SMBus开始

SEND_START=0;

}

if（SMB_SENDWORDADDR）//Arewesendingthewordaddress?

高八位

SMB_SENDWORDADDR=0;

//Clearflag高八标志位

SMB0DAT=WORD_ADDR;

/*因为是AT24C08这只送一位地址*/

//【送高位地址】endword'

shigh8bitsaddress

if（SMB_RANDOMREAD）

SEND_START=1;

//sendaSTARTafterthenextACKcycle

SMB_RW=READ;

//elseif（SMB_SENDWORDADDR1）//Arewesendingthewordaddress?

低八位

//{

//SMB_SENDWORDADDR1=0;

//Clearflag

//SMB0DAT=WORD_ADDR1;

//【送低位地址】sendword'

slow8bitsaddress

///*一下注销部分移到上面因为只传一位地址*/

////if（SMB_RANDOMREAD）

////{

////SEND_START=1;

////SMB_RW=READ;

////}

//break;

//}

if（SMB_RW==WRITE）//IsthistransferaWRITE?

if（i<

SMB_DATA_LEN）//Istheredatatosend?

SMB_DATA_LEN=1；

{//【写数据】

SMB0DAT=*pSMB_DATA_OUT;

//senddatabyte*pSMB_DATA_OUT是指针指的是地址

pSMB_DATA_OUT++;

//incrementdataoutpointer数据++是加地址指向例如从0x00>

>

0x01

i++;

else

STO=1;

//setSTOtotermintetransfer传送接收

SMBUS_WRITE_FLAG=1;

//加标志位

i=0;

//i清零

else{}//IfthistransferisaREAD,

//thentakenoaction.Slave

//addresswastransmitted.A

//separate'

case'

isdefined

//fordatabyterecieved.

else//IfslaveNACK,

if（SMB_ACKPOLL）

//Restarttransfer

else

FAIL=1;

//Indicatefailedtransfer

}//andhandleatendofISR

//MasterReceiver:

bytereceived

caseSMB_MRDB:

//0x80//（MR）数据字节接收P0：

端口0寄存器

if（ACK）

{

if（SMB_RW==READ）

{

i++;

temp=SMB0DAT;

if（i==SMB_DATA_LEN）//Thisisthelastbyte

ACK=0;

//SendNACKtoindicatelastbyte

SMBUS_RECV_FLAG=1;

//ofthistransfer

STO=1;

i=0;

//SendSTOPtoterminatetransfer

}

}

default:

//所以的case事件都不成立的执行的事件

//andhandleatendofISR

if（FAIL）//Ifthetransferfailed,

SMB0CN&

=~0x40;

//Resetcommunication

SMB0CN|=0x40;

//先清零再发送模式

SI=0;

//clearinterruptflag清中断

//Functions

//EEPROM_ByteWrite（）

//Thisfunctionwritesthevaluein<

dat>

tolocation<

addr>

intheEEPROMthen

//pollstheEEPROMuntilthewriteiscomplete.

/*addr原为int型unsignedintaddr现改成unsignedcharaddr*/

voidEEPROM_ByteWrite（unsignedcharaddr,unsignedchardat）//地址数据

//SetSMBusISRparameters

TARGET=EEPROM_ADDR;

//Settargetslaveaddress

SMB_RW=WRITE;

//Marknexttransferasawrite

SMB_SENDWORDADDR=1;

//Sendhigh8bitsWordAddressafterSlaveAddress

//SMB_SENDWORDADDR1=1;

/*原来为256两位地址现注销掉*/Sendlow8bitsWordAddressafterSlaveAddress

SMB_RANDOMREAD=0;

//DonotsendaSTARTsignalafter

//thewordaddress

SMB_ACKPOLL=1;

//EnableAcknowledgePolling（TheISR

//willautomaticallyrestartthe

//transferiftheslavedoesnot

//acknoledgeitsaddress.

//SpecifytheOutgoingData

WORD_ADDR=addr;

/*AT24C08一位地址修改*/

//WORD_ADDR=addr/256;

/*原来为256两位地址现注销掉*/Setthetargetaddressinthe

//EEPROM'

sinternalmemoryspace

//WORD_ADDR1=addr%256;

SMB_SINGLEBYTE_OUT=dat;

//storedat（localvariable）inaglobal

//variablesotheISRcanreaditafter

//thisfunctionexits

pSMB_DATA_OUT=&

SMB_SINGLEBYTE_OUT;

//Theoutgoingdatapointerpointsto

SMB_DATA_LEN=1;

//SpecifytoISRthatthenexttransfer

//willcontainonedatabyte

//InitiateSMBusTransfer

//EEPROM_ByteRead（）

//Thisfunctionreturnsasinglebytefromlocation<

//pollsthe<

SMB_BUSY>

flaguntilthereadiscomplete.

unsignedcharEEPROM_ByteRead（unsignedcharaddr）//读的时候只能读一个字节，其他的是没有存，存不住的

{//即使放到了temp_char[8]中，但是在上电时就会失去了

//Arandomreadstartsasawrite

//thenchangestoareadafter

//therepeatedstartissent.The

//ISRhandlesthisswitchoverif

//the<

SMB_RANDOMREAD>

bitisset.

/*原为256两位地址现注销掉*///Sendlow8bitsWordAddressafterSlaveAddress

SMB_RANDOMREAD=1;

//SMB_RW=READ;

//SendaSTARTafterthewordaddress

//EnableAcknowledgePolling

//SpecifytheIncomingData

WORD_ADDR=addr;

/*原来为256两位地址现注销掉*/Setthetargetaddressinthe

while（SMBUS_RECV_FLAG==0）;

/*原两句注销到了，所以每次STA=1之后就开始返回*/

SMBUS_RECV_FLAG=0;

/*加上之后是等STO=1也就是结束之后再返回这个值*/

//有returnretval就相当于A=retval

returntemp;

//SMBus.h文件

////////////////////////////////////////////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////////////////////////////////////////

externvoidI2C_Init（void）;

externvoidTimer3_Init（void）;

externunsignedchartemp_char[12];

externbitSMBUS_RECV_FLAG;

externbitSMBUS_WRITE_FLAG;

sfr16DP=0x82;

sfr16ADC0=0xbd;

sfr16ADC0GT=0xc3;

sfr16ADC0LT=0xc5;

sfr16RCAP2=0xeb;

sfr16TMR2=0xcc;

sfr16TMR3=0x94;

#ifdefINT_ISR_C

#defineWRITE0x00//SMBusWRITEcommand

#defineREAD0x01//SMBusREADcommand

//Deviceaddresses（7bits,lsbisadon'

tcare）

#defineWrite_EE_Addr0xA0//器件写地址+写命令

#defineRead_EE_Addr0xa1//器件写地址+读命令

#defineEEPROM_ADDR0xA0//铁电存储器的地址

//Note:

Thisaddressisspecified

//intheMicrochip24C256

//datasheet.

//SMBusBufferSize

#defineSMB_BUFF_SIZE0x08//接收和发送的长度可以改吗？

//Definesthemaximumnumberofbytes

//应该是没用上这个声明//thatcanbesentorreceivedina

//singletransfer

//Statusvector-top4bitsonly

#defineSMB_MTSTA0xE0//（MT）开始传送ACC：

累加器

#defineSMB_MTDB0xC0//（MT）数据字节传送SMB0CN：

SMBus控制寄