F32xSPI0EEPROMPolledMode.docx

F32xSPI0EEPROMPolledMode.docx

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F32xSPI0EEPROMPolledMode

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

//F32x_SPI0_EEPROM_Polled_Mode.c

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

//Copyright2006SiliconLaboratories,Inc.

//

//

//ProgramDescription:

//

//ThisprogramaccessesaSPIEEPROMusingpolledmodeaccess.The'F32xMCU

//isconfiguredin4-wireSingleMasterMode,andtheEEPROMistheonly

//slavedeviceconnectedtotheSPIbus.Theread/writeoperationsare

//tailoredtoaccessaMicrochip4kBEEPROM25LC320.Therelevanthardware

//connectionsofthe'F32xMCUareshownhere:

//

//P0.0-SPISCK（digitaloutput,push-pull）

//P0.1-SPIMISO（digitalinput,open-drain）

//P0.2-SPIMOSI（digitaloutput,push-pull）

//P0.3-SPINSS（digitaloutput,push-pull）

//P0.4-UARTTXD（digitaloutput,push-pull）

//P0.5-UARTRXD（digitalinput,open-drain）

//P2.2-LED（digitaloutput,push-pull）

//

//

//HowToTest:

//

//Method1:

//1）Downloadthecodetoa'F32xdevicethatisconnectedasabove.

//2）Runthecode.TheLEDwillblinkfastduringthewrite/read/verify

//operations.

//3）Iftheverificationpasses,theLEDwillblinkslowly.Ifitfails,

//theLEDwillbeOFF.

//

//Method2（optional）:

//1）Downloadcodetoa'F32xdevicethatisconnectedasabove,and

//alsoconnectedtoaRS232transceiver.

//2）ConnectastraightserialcablefromtheRS232transceivertoaPC.

//3）OnthePC,openHyperTerminal（oranyotherterminalprogram）andconnect

//totheCOMportatand8-N-1

//4）HyperTerminalwillprinttheprogressofthewrite/readoperation,andin

//theendwillprintthetestresultaspassorfail.Additionally,ifthe

//verificationpasses,theLEDwillblinkslowly.Ifitfails,theLEDwill

//beOFF.

//

//

//Target:

C8051F320/1

//Toolchain:

KeilC517.50/KeilEVALC51

//CommandLine:

None

//

//Release1.0

//-InitialRevision（PKC）

//-18MAY2006

//

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

//Includes

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

#include//SFRdeclarations

#include//printfisdeclaredhere

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

//16-bitSFRDefinitionsforthe'F32x

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

sfr16TMR2=0xCC;//Timer2lowandhighbytestogether

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

//User-definedtypes,structures,unionsetc

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

#ifndefBYTE

#defineBYTEunsignedchar

#endif

#ifndefUINT

#defineUINTunsignedint

#endif

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

//GlobalConstants

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

#defineBAUDRATE115200//BaudrateofUARTinbps

#defineSYSCLK24000000//InternaloscillatorfrequencyinHz

//Microchip25AA320SlaveEEPROMParameters

#defineF_SCK_MAX2000000//MaxSCKfreq（Hz）

#defineT_NSS_DISABLE_MIN500//MinNSSdisabletime（ns）

#defineEEPROM_CAPACITY4096//EEPROMcapacity（bytes）

//EEPROMInstructionSet

#defineEEPROM_CMD_READ0x03//ReadCommand

#defineEEPROM_CMD_WRITE0x02//WriteCommand

#defineEEPROM_CMD_WRDI0x04//ResetWriteEnableLatchCommand

#defineEEPROM_CMD_WREN0x06//SetWriteEnableLatchCommand

#defineEEPROM_CMD_RDSR0x05//ReadStatusRegisterCommand

#defineEEPROM_CMD_WRSR0x01//WriteStatusRegisterCommand

sbitLED=P2^2;//LED='1'meansON

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

//FunctionPrototypes

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

voidPCA0_Init（void）;

voidOSCILLATOR_Init（void）;

voidPORT_Init（void）;

voidTIMER2_Init（void）;

voidUART0_Init（void）;

voidSPI0_Init（void）;

voidInit_Device（void）;

voidDelay_us（BYTEtime_us）;

voidDelay_ms（BYTEtime_ms）;

voidEEPROM_Write（UINTaddress,BYTEvalue）;

BYTEEEPROM_Read（UINTaddress）;

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

//main（）Routine

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

voidmain（void）

{

UINTaddress;//EEPROMaddress

BYTEtest_byte;//Usedasatemporaryvariable

Init_Device（）;//Initializeshardwareperipherals

//ThefollowingcodewilltesttheEEPROMbyperformingwrite/read/verify

//operations.Thefirsttestwillwrite0xFFstotheEEPROM,andthe

//secondtestwillwritetheLSBsoftheEEPROMaddresses.

//FillEEPROMwith0xFF's

LED=1;

printf（"Fillingwith0xFF's...\n"）;

for（address=0;address

{

test_byte=0xFF;

EEPROM_Write（address,test_byte）;

//PrintstatustoUART0

if（（address%16）==0）

{

printf（"\nWriting0x%04x:

%02x",address,（UINT）test_byte）;

LED=~LED;

}

else

printf（"%02x",（UINT）test_byte）;

}

//VerifyEEPROMwith0xFF's

printf（"\n\nVerifying0xFF's...\n"）;

for（address=0;address

{

test_byte=EEPROM_Read（address）;

//PrintstatustoUART0

if（（address%16）==0）

{

printf（"\nVerifying0x%04x:

%02x",address,（UINT）test_byte）;

LED=~LED;

}

else

printf（"%02x",（UINT）test_byte）;

if（test_byte!

=0xFF）

{

LED=0;

printf（"Errorat%u\n",address）;

while

（1）;//Stophereonerror（fordebugging）

}

}

//FillEEPROMwithLSBofEEPROMaddresses

printf（"\n\nFillingwithLSBofEEPROMaddresses...\n"）;

for（address=0;address

{

test_byte=address&0xFF;

EEPROM_Write（address,test_byte）;

//PrintstatustoUART0

if（（address%16）==0）

{

printf（"\nWriting0x%04x:

%02x",address,（UINT）test_byte）;

LED=~LED;

}

else

printf（"%02x",（UINT）test_byte）;

}

//VerifyEEPROMwithLSBofEEPROMaddresses

printf（"\n\nVerifyingLSBofEEPROMaddresses...\n"）;

for（address=0;address

{

test_byte=EEPROM_Read（address）;

//printstatustoUART0

if（（address%16）==0）

{

printf（"\nVerifying0x%04x:

%02x",address,（UINT）test_byte）;

LED=~LED;

}

else

printf（"%02x",（UINT）test_byte）;

if（test_byte!

=（address&0xFF））

{

LED=0;

printf（"Errorat%u\n",address）;

while

（1）;//Stophereonerror（fordebugging）

}

}

printf（"\n\nVerificationsuccess!

\n"）;

while

（1）//Loopforever

{

LED=~LED;//FlashLEDwhendone（allverified）

Delay_ms（200）;

}

}

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

//InitializationSubroutines

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

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

//PCA0_Init

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

//

//ReturnValue:

None

//Parameters:

None

//

//Thisfunctiondisablesthewatchdogtimer.

//

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

voidPCA0_Init（void）

{

PCA0MD&=~0x40;

PCA0MD=0x00;

}

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

//OSCILLATOR_Init

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

//

//ReturnValue:

None

//Parameters:

None

//

//Thisfunctioninitializesthesystemclockat24MHz（intosc->clkmul/2）.

//

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

voidOSCILLATOR_Init（void）

{

inti=0;

CLKMUL=0x80;

for（i=0;i<20;i++）;//Wait5usforinitialization

CLKMUL|=0xC0;

while（（CLKMUL&0x20）==0）;

CLKSEL=0x02;

OSCICN=0x83;

}

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

//PORT_Init

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

//

//ReturnValue:

None

//Parameters:

None

//

//ThisfunctionconfiguresthecrossbarandGPIOports.

//

//P0.0-SCK（SPI0）,Push-Pull,Digital

//P0.1-MISO（SPI0）,Open-Drain,Digital

//P0.2-MOSI（SPI0）,Push-Pull,Digital

//P0.3-NSS（SPI0）,Push-Pull,Digital

//P0.4-TX0（UART0）,Push-Pull,Digital

//P0.5-RX0（UART0）,Open-Drain,Digital

//P0.6-Unassigned,Open-Drain,Digital

//P0.7-Unassigned,Open-Drain,Digital

//P1.0-Unassigned,Open-Drain,Digital

//P1.1-Unassigned,Open-Drain,Digital

//P1.2-Unassigned,Open-Drain,Digital

//P1.3-Unassigned,Open-Drain,Digital

//P1.4-Unassigned,Open-Drain,Digital

//P1.5-Unassigned,Open-Drain,Digital

//P1.6-Unassigned,Open-Drain,Digital

//P1.7-Unassigned,Open-Drain,Digital

//P2.0-Skipped,Open-Drain,Digital（SwitchS2onTargetBoard）

//P2.1-Skipped,Open-Drain,Digital（SwitchS3onTargetBoard）

//P2.2-Skipped,Push-Pull,Digital（LEDD4onTargetBoard）

//P2.3-Skipped,Push-Pull,Digital（LEDD2onTargetBoard）

//

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

voidPORT_Init（void）

{

P0MDOUT=0x1D;

P2MDOUT=0x0C;

P2SKIP=0x0F;

XBR0=0x03;

XBR1=0x40;

}

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

//TIMER2_Init

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

//

//ReturnValue:

None

//Parameters:

None

//

//InitializesTimer2tobeclockedbySYSCLKforuseasadelaytimer.

//

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

voidTIMER2_Init（void）

{

CKCO