lle_eeeprom.c

BCM 控制demo源代码

#include <hidef.h>      /* common defines and macros */
#include <MC9S12XEP100.h>     /* derivative information */

#include "typedefs.h"
#include "lle_EEEPROM.h"

//==============================================================================
//EEE_Enable
//==============================================================================
void EEE_Enable(void)
{
  FSTAT = 0x30;     //clear ACCERR and PVIOL
  
  FCCOBIX = 0x00;   
  FCCOB = 0x1300;   //enable EEPROM Emulation Command
    
  FSTAT_CCIF = 1;   //lunch command
  while(FSTAT_CCIF == 0); //wait for done  
}

//==============================================================================
//EEE_Disable
//==============================================================================
void EEE_Disable(void)
{
  FSTAT = 0x30;     //clear ACCERR and PVIOL
  
  FCCOBIX = 0x00;   
  FCCOB = 0x1400;   //disable EEPROM Emulation Command
    
  FSTAT_CCIF = 1;   //lunch command
  while(FSTAT_CCIF == 0); //wait for done  
}

//==============================================================================
//DFLASH_Partition
//==============================================================================
void DFLASH_Partition(unsigned int DFPART, unsigned int ERPART)
{
  while(FSTAT_CCIF == 0); //wait if command in progress
  FSTAT = 0x30;           //clear ACCERR and PVIOL
  
  FCCOBIX = 0x00;   
  FCCOB = 0x2000;         //Partition D-Flash Command    
  FCCOBIX = 0x01;   
  FCCOB = DFPART;
  FCCOBIX = 0x02;   
  FCCOB = ERPART;        
      
  FSTAT_CCIF = 1;         //lunch command
  while(FSTAT_CCIF == 0); //wait for done  
}

//==============================================================================
//DFLASH_Full_Partition
//==============================================================================
void DFLASH_Full_Partition(unsigned int DFPART, unsigned int ERPART)
{
  while(FSTAT_CCIF == 0); //wait if command in progress
  FSTAT = 0x30;           //clear ACCERR and PVIOL
  
  FCCOBIX = 0x00;     
  FCCOB = 0x0F00;         //Full Partition D-Flash Command  
  FCCOBIX = 0x01;   
  FCCOB = DFPART;
  FCCOBIX = 0x02;   
  FCCOB = ERPART;        
      
  FSTAT_CCIF = 1;         //lunch command
  while(FSTAT_CCIF == 0); //wait for done  
}

//==============================================================================
//EEE_Init
//==============================================================================
void lle_EEE_Init(void)
{
  while(FSTAT_CCIF == 0);   //wait if command in progress
  MMCCTL1_EEEIFRON = 1;     //enable EEEIFR in memory map
  FCLKDIV = EEEPROM_FDIV;           //osc = 16MHz    
  
  
  //set ERPART, DFPART. One of following routines has to be called before 
  //enabling the emulated EEPROM.
  
  DFLASH_Partition(0,16);   
  //DFLASH_Partition is valid in all modes. If we want to change the setting of 
  //DFPART and ERPART, then the appropriate nonvolatile bytes has to be erased.
  //Otherwise this command is not executed. So the DFLASH is not erased during debugging 
  //in special mode if nonvolatile bytes are not erased manually 
  //(only first time when the DFPART and ERPART is set).
  
  //DFLASH_Full_Partition(0,16);
  //DFALSH_Full_Partition is valid only in unsecured special single chip mode and
  //unsecured special mode. This command will set the DFPART and ERPART (nonvolatile
  //bytes) and will erase whole DFLASH memory. The command is not executed in other 
  //modes (and data are not erased in other modes of course). 
  
  //See please document MC9S12XEP100.pdf for more information
  //Full Partition D-Flash Command - page 893
  //Partition D-Flash Command - page 902 
  
  EEE_Enable();             //enable EEE
}

//==============================================================================