mc9s12xdp512的EEPROM (amobbs.com 阿莫电子技术论坛) -

yss315 发表于 2011-11-10 12:45:51

mc9s12xdp512的EEPROM

飞思卡尔 mc9s12xdp512的EEPROM读写，有写过的贴下代码。。。谢了!

dreampet 发表于 2011-11-10 13:41:57

xdp512的手册有详细的读写流程图，另外可以Codewarrior自带的PE生成代码参考下
xdp512的EEPROM可编程为每8字节或每4字节一个扇区，每次写入时要确保该扇区已被擦除，如果是批量写入数据的话，要注意跨扇区的处理，最好是以4字节对齐写入。

yss315 发表于 2011-11-10 14:14:53

0x13_F000 到 0x13_FFFF 这下划线什么意思？

初始化部分：
   ECLKDIV = 0x28; //EEPROM CLK 200K
   ECNFG = 0x00; //关命令缓冲区空中断，关命令完成中断
   EPROT = 0x88; // 关写保护
   ESTAT = 0x00; //标志位清零
//写EEPROM
void EEPROMWrite(longAddress,short WData)
{

if(ECLKDIV_EDIVLD == 1)
{
if(ESTAT_CBEIF == 1)

{
   if((ESTAT_PVIOL == 0) && (ESTAT_ACCERR == 0))
   {
   EADDRHI = (Address >> 8) & 0xff;
   EADDRLO = Address & 0xff;
   EDATAHI = (WData >> 8) & 0xff;
   EDATALO = WData & 0xff;
   ECMD = 0x20;
   ESTAT = 0x80;
   while(ESTAT_CBEIF == 0);
   while(ESTAT_CCIF == 0);
   }
   else
   {
   ESTAT = 0x30;
   }

}
else
ECLKDIV = 0x28;
}
}
//擦除
void EEPROMErase(long Address,short EData)
{

if(ECLKDIV_EDIVLD == 1)
{
if(ESTAT_CBEIF == 1)

{
   if((ESTAT_PVIOL == 0) && (ESTAT_ACCERR == 0))
   {
   EADDRHI = (Address >> 8) & 0xff;
   EADDRLO = Address & 0xff;
   EDATAHI = (EData >> 8) & 0xff;
   EDATALO = EData & 0xff;
   ECMD = 0x05;
   ESTAT = 0x80;
   while(ESTAT_CCIF == 0);
   while(ESTAT_BLANK == 0);

   }
   else
   {
   ESTAT = 0x30;
   }

}
else
ECLKDIV = 0x28;
}
}

这样貌似不行。。。有什么问题吗？

yss315 发表于 2011-11-14 19:01:01

高手路过，回答下。。。逻辑地址，页地址，全局地址；

http://cache.amobbs.com/bbs_upload782111/files_47/ourdev_695157PY4HT4.jpg
EEPROM地址 (原文件名:未命名.jpg)

http://cache.amobbs.com/bbs_upload782111/files_47/ourdev_695158L7851P.jpg
MMC，逻辑地址与全局地址 (原文件名:未命名1.jpg)

yss315 发表于 2011-11-15 08:54:43

EEprom应该写到什么地址？怎么配置？谢了。

dreampet 发表于 2011-11-15 21:00:03

如果你的数据少的话，可以存到0xC00至0x1000这个区间，如果想利用全部4K的EEPROM，就需要通过EPAGE寄存器来将另外的另外的3K空间映射到0x800至0xBFF这个区间。
http://cache.amobbs.com/bbs_upload782111/files_47/ourdev_695601XTQMAO.JPG
(原文件名:xdp512.JPG)

yss315 发表于 2011-11-17 09:18:59

0xC00至0x1000 ,貌似我试过，仿真时MEMERY窗口能看到写进去的值；但断电貌似就丢失了。。。。

硬件都被拿出去调试了，等硬件回来。。。我再试试了。。。。先谢了。

dreampet 原野留个联系方式吧，呵呵。。我的QQ 549848360

jiang887786 发表于 2012-12-18 22:07:32

学习一下！

wang1216 发表于 2015-7-17 15:30:41

unsigned char write(unsigned long addr, unsigned long data)
{

ESTAT_PVIOL = 1;
ESTAT_ACCERR = 1;                         //clear error flags
if(( ESTAT_PVIOL == 1) || (ESTAT_ACCERR == 1))
{
ESTAT_PVIOL = 1;
ESTAT_ACCERR = 1;                      //clear error flags
   return(0);
}

while(!ESTAT_CBEIF);                      //if there are still some commands in the buffer, wait

*(unsigned short *far)addr = 0xFF;
ECMD = EE_CMD_SECTORERASE;
ESTAT |= 0x80;                         //clear the interrupt flag
if((ESTAT_PVIOL == 1) || (ESTAT_ACCERR == 1))//if there are erros
{
ESTAT_PVIOL = 1;
ESTAT_ACCERR = 1;                      //clear error flags
return(0);
}

while(!ESTAT_CBEIF);                      //if there are still some commands in the buffer, wait
while(!ESTAT_CCIF);

if( (ESTAT_PVIOL == 1) || (ESTAT_ACCERR == 1))
{
ESTAT_PVIOL=1;
ESTAT_ACCERR=1;                               //clear error flags
return(0);
}

while(!ESTAT_CBEIF){};                         //if there are still some commands in the buffer, wait
*(unsigned short *far)addr = ((unsigned short *)&data);
                              //write the data into the address
ECMD = EE_CMD_WORDWRITE;
ESTAT |= 0x80;                                  //clear the interrupt flag.
if(ESTAT_PVIOL == 1 || ESTAT_ACCERR == 1)       //there are errors.
{
ESTAT_PVIOL=1;
ESTAT_ACCERR=1;                               //clear the error flags.
return(0);

}
while(!ESTAT_CCIF);

if( (ESTAT_PVIOL == 1) || (ESTAT_ACCERR == 1))
{
ESTAT_PVIOL=1;
ESTAT_ACCERR=1;                               //clear error flags
return(0);
}

while(!ESTAT_CBEIF){};                         //if there are still some commands in the buffer, wait
*(unsigned short *far)(addr+2) = ((unsigned short *)&data);                                  //write the data into the address
ECMD = EE_CMD_WORDWRITE;
ESTAT |= 0x80;                                  //clear the interrupt flag.
if(ESTAT_PVIOL == 1 || ESTAT_ACCERR == 1)       //there are errors.
{
ESTAT_PVIOL=1;
ESTAT_ACCERR=1;                               //clear the error flags.
return(0);

}
while(!ESTAT_CCIF);
return 1;

}
地址从0x13f000开始

wang1216 发表于 2015-7-17 15:32:47

wang1216 发表于 2015-7-17 15:52:46

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mc9s12xdp512的EEPROM