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标题: 为什么我的EEPROM的程序有问题，高手们指点 [打印本页]

作者: lichuanfa 时间: 2006-11-29 13:03 标题: 为什么我的EEPROM的程序有问题，高手们指点

#include <hidef.h> /* common defines and macros */
#include <mc9s12d64.h> /* derivative information */

#pragma LINK_INFO DERIVATIVE "mc9s12d64"

unsigned int *eeprom;

unsigned char *erase;

void main(void) {

/* put your own code here */

   unsigned int readdata;



/*   初始化系统时钟       */
eeprom=( volatile unsigned int*)(0x0a00);
erase =( volatile unsigned int*)(0x0a00);

asm{

   LDAB #1;
   STAB REFDV;
   LDAB #2;
   STAB SYNR;

   WAIT: BRCLR CRGFLG , #$08,*;
   BSET CLKSEL , #$80;

}

/*   设置FLASH AND EEPROM的访问频率   */

/* 16MHz的晶振频率经过8分频后得到2MHz的频率，在经过10分频获得200KHz的 EEPROM的访问频率*/
   asm{

   LDAA #$49;
   STAA FCLKDIV;
   STAA ECLKDIV; //0100 1001

   }



    INITEE =0x09;
    asm nop;

while (!( EPROT & 0x80 ) ) ;

if ( ESTAT_CBEIF==1 )//地址数据和命令缓冲器空
{

     *erase=0xff;
    ECMD=0x40;
     ESTAT_CBEIF=1;
   while ( ESTAT_CCIF==0 )

    asm nop;

}

   asm nop;

    if ( ESTAT_CBEIF==1 )//地址数据和命令缓冲器空
{

     *eeprom=0x1234;
    ECMD=0x20;
     ESTAT_CBEIF=1;
   while ( ESTAT_CCIF==0 )

    asm nop;

}

// readdata=*eeprom;

readdata=*((unsigned int *)0x00a00);

asm nop;


EnableInterrupts;

for(;;) {} /* wait forever */
}

作者: strongchen 时间: 2006-11-30 17:26

请参考PE生成的代码：

/*
** ===================================================================
** Method : WriteSector (bean IntEEPROM)
**
** Description :
** The method writes the dword sector data to an EEPROM memory.
** This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
static byte WriteSector(IEE1_TAddress AddrSec,dword Data32)
{
byte err; /* Temporary variable */

if (ESTAT_CBEIF == 0) { /* Is command buffer full ? */
return ERR_BUSY; /* If yes then error */
}
/* ESTAT: PVIOL=1,ACCERR=1 */
ESTAT = 48; /* Clear error flags */
*(volatile word *)(AddrSec) = (word)(Data32 >> 16); /* Array address and program data - higher part */
/* ECMD: ??=0,CMDB6=1,CMDB5=1,??=0,??=0,CMDB2=0,??=0,CMDB0=0 */
ECMD = 96; /* Sector modify command */
ESTAT_CBEIF = 1; /* Clear flag command buffer empty */
if ((ESTAT_PVIOL == 1)||(ESTAT_ACCERR == 1)) { /* Is protection violation or acces error detected ? */
return ERR_NOTAVAIL; /* If yes then error */
}
while (ESTAT_CBEIF == 0) {} /* Wait to buffer empty */
err=WriteWord(AddrSec + 2,(word)Data32); /* Write lower part */
if (err != ERR_OK) { /* Was attemp to write data to the given address errorneous? */
return err; /* If yes then error */
}
if (*(volatile word *)(AddrSec) != (word)(Data32 >> 16)) { /* Was attempt to write data to the given address errorneous? */
return ERR_VALUE; /* If yes then error */
}
return ERR_OK;
}

作者: strongchen 时间: 2006-11-30 17:28

判断是否完成时这一句很关键：

if ((ESTAT_PVIOL == 1)||(ESTAT_ACCERR == 1)){}

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