eeprom128.c

AVR16源代码 ICC编译器

#include	<iom16v.h>
#include 	"Eeprom128.h"

//============================================================
//函	数：unsigned char eeprom_read_byte(unsigned long *addr)
//功	能：读取EE一个字节
//入口参数：读取地址  
//返 回 值：读取的字节数据  
//设 计 者：覃道堂
//创作时间：2006-03-28
//修改时间：
//修改目的：
//============================================================
unsigned char eeprom_read_byte(unsigned int *addr)
{
	/* Wait for completion of previous write */
	while(EECR & (1<<EEWE));
	/* Set up address register */
	EEAR = *addr;
	/* Start eeprom read by writing EERE */
	EECR |= (1<<EERE);
	/* Return data from Data Register */
	return EEDR;
}
//============================================================
//函	数：void eeprom_write_byte(unsigned long *addr, unsigned char val)
//功	能：写入EE一个字节
//入口参数：写入地址，写入数据  
//返 回 值：无  
//设 计 者：覃道堂 
//创作时间：2006-03-28
//修改时间：
//修改目的：
//============================================================
void eeprom_write_byte(unsigned int *addr, unsigned char val) 
{
	/* Wait for completion of previous write */
	while(EECR & (1<<EEWE));
	/* Set up address and Data Registers */
	EEAR = *addr;
	EEDR = val;
	/* Write logical one to EEMWE */
	EECR |= (1<<EEMWE);
	/* Start eeprom write by setting EEWE */
	EECR |= (1<<EEWE);
	while(EECR & (1<<EEWE));
}
/*****************************************************************************
*
*   Function name : StoreEEPROM
*
*   Returns :       None
*
*   Parameters :    Pointer to string, number of bytes to write, adress in EEPROM
*
*   Purpose :       Write byte(s) to the EEPROM
*
*****************************************************************************/
void Write_EEPROM(unsigned char *pBuffer, unsigned char num_bytes, unsigned int EE_START_ADR)
{
    	unsigned char 	i;
    	for (i=0;i<num_bytes;i++) 
    	{
		eeprom_write_byte(&EE_START_ADR, pBuffer[i]);
		EE_START_ADR++;
	}
}


/*****************************************************************************
*
*   Function name : ReadEEPROM
*
*   Returns :       None
*
*   Parameters :    Pointer to string, number of bytes to read, adress in EEPROM
*
*   Purpose :       Write byte(s) to the EEPROM
*
*****************************************************************************/

void Read_EEPROM(unsigned char *pBuffer, unsigned char num_bytes, unsigned int EE_START_ADR)
{
    	unsigned char 	i;
    	
    	for (i=0;i<num_bytes;i++) 
    	{
		pBuffer[i]=eeprom_read_byte(&EE_START_ADR);
		EE_START_ADR++;
	}
}