//向EEPROM中寫入數據，然后讀出數據，賦值給PORTD，點亮相應的LED燈

#include /* for EnableInterrupts macro */

#include "derivative.h" /* include peripheral declarations */

#define uint unsigned int

#define uchar unsigned char

#define LED     PTDD

#define LED_DIR PTDDD

#define LED_OFF 0XFF

void Read_EEPROM(uint start_addr, uchar *pReadbuf, uchar length);

void Write_EEPROM(uint start_addr, uchar *pData, uchar length);

//uchar Data[6] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06};

//uchar Readbuf[6] = {0};

uchar Data[6] = {0xFE, 0xFD, 0xFB, 0xF7, 0xEF, 0xDF};

uchar Readbuf[6] = {0XFF};

uchar i = 0;

uint j = 60000;

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

/*                  初始化總線時鐘PEE模式                    */

/*              外部晶振頻率為4MHz，總線頻率16MHz            */

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

void INIT_MCG(void) 

{

  MCGC2=0x36;        

  while(!MCGSC_OSCINIT);     

  MCGC1=0xb8;

  while(MCGSC_IREFST);

  while(MCGSC_CLKST!=0b10);

  MCGC2_LP = 1;

  MCGC1 = 0x90;

  MCGC3 = 0x48;     

  MCGC2_LP = 0;

  while(!MCGSC_PLLST);

  while(!MCGSC_LOCK);

  MCGC1 = 0x10;

  while(MCGSC_CLKST!=0b11);

}

void main(void) {

  DisableInterrupts;

  SOPT1 = 0;

  INIT_MCG();

  LED_DIR = 0XFF;

  LED = LED_OFF;

  EnableInterrupts; /* enable interrupts */

  /* include your code here */

  FCDIV = 73;//設置分頻，16MHZ/8/(9+!)在150k到200khz之間

  //EEPROM整個空間為2*1024BYTES，地址為0x1400到0x17FF

  //寫入數據部分

  Write_EEPROM(0X1400, Data, 6);

  //讀出數據部分

  Read_EEPROM(0X1400, Readbuf, 6);

  while(1) 

  {

      for(i = 0; i < 6; i++) 

      {

        LED = Readbuf[i];

        while(j--);

      }

  }

  for(;;) {

    __RESET_WATCHDOG(); /* feeds the dog */

  } /* loop forever */

  /* please make sure that you never leave main */

}

void Write_EEPROM(uint start_addr, uchar *pData, uchar length) 

{

  uchar i;

  uchar *pAddr;

  if(FSTAT_FACCERR == 1)

    FSTAT_FACCERR = 1;//通過寫入1來清除錯誤標記

   pAddr = (uchar *)(start_addr);//指定地址

   *pAddr = 0x01;

   FCMD = 0X40;//擦除命令

   FSTAT_FCBEF = 1;//啟動命令

   asm{         //等待4個bus cycle

   NOP

   NOP

   NOP

   NOP

   }

   while(FSTAT_FCCF == 0);//等待完成

   for(i = 0; i < length; i++) 

   {

      if(FSTAT_FACCERR == 1)

        FSTAT_FACCERR = 1;

      pAddr = (uchar *)(start_addr + i);

      *pAddr = pData[i];

      FCMD = 0X20;//寫入命令

      FSTAT_FCBEF = 1;// 啟動命令

      asm

      {

        NOP

        NOP

        NOP

        NOP

      }

      while(FSTAT_FCCF == 0);//等待完成

   }

}

void Read_EEPROM(uint start_addr, uchar *pReadbuf, uchar length) 

{

    uchar i;

    uchar *pAddr;

    for(i = 0; i < length; i++) 

    {

      pAddr = (uchar *)(start_addr);

      pReadbuf[i] = *pAddr;

      start_addr++;

    }

}