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
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