eeprom.c

用ATMEGA16的硬件SPI驱动AT45DB041D

#include <iom16v.h>
#include <macros.h>

void eeprom_write_byte(unsigned int address,unsigned char ucData)
{
	/* 等待上一次写操作结束 */
	while(EECR & (1<<EEWE))
	;
	/* 设置地址和数据寄存器 */
	EEAR = address;
	EEDR = ucData;
	/* 置位EEMWE */
	EECR |= (1<<EEMWE);
	/* 置位EEWE以启动写操作 */
	EECR |= (1<<EEWE);
}