AVR EEPROM读写

void Write_byte_eeprom(unsigned short address,unsigned char data)

{
while (EECR&(1<EEAR = address;
EEDR = data;
EECR |= (1<EECR |= (1<}

unsigned char Read_byte_eeprom(unsigned short address)
{
while (EECR&(1<EEAR = address;
EECR |= (1<}

void Refresh_eeprom(void)
{
unsigned char i = 0;
unsigned char check = 0;
unsigned char *p = (unsigned char *)&ram;

asm(“cli”);

ram.start = 0x55;
for (; i<(sizeof(ram)-1); i++)
{
Write_byte_eeprom(i,*(p+i));
check += *(p+i);
}
Write_byte_eeprom(i,check);

asm(“sei”);
}

void Read_eeprom(void)
{
unsigned char i = 0;
unsigned char check = 0;
unsigned char *p = (unsigned char *)&ram;

for (; i<(sizeof(ram)-1); i++)
{
*(p+i) = Read_byte_eeprom(i);
check += *(p+i);
}
*(p+i) = Read_byte_eeprom(i);
//取值合理性判别

if ((*(p+i) != check) || (*p != 0x55))
{
Parameter_reset();
}

}