eprom.c

这个是用C编写的Atmega169的EEPROM的读写程序！

#include <avr/io.h>
#include <avr/eeprom.h>
#define RS PA7
#define RW PA5
#define EN PA6
#define DIN PB2
#define UP_KEY PA0
#define DOWN_KEY PA1
#define OK_KEY PA2 
#define RW_CLR  PORTA &=~(1<<RW)
#define RW_SET  PORTA |=(1<<RW)
#define RS_CLR  PORTA &=~(1<<RS)
#define RS_SET  PORTA |=(1<<RS)
#define EN_CLR  PORTA &=~(1<<EN)
#define EN_SET  PORTA |=(1<<EN)
unsigned char xianshi[16]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,0x45,0x46};

void delay(unsigned int j)
{  
   unsigned int i;
   for(i=0;i<j;i++){}
}
void lcd_data(unsigned char data)
{ 
	RS_SET;
	EN_SET;
	delay(200);
	PORTC=data;
	delay(200);
	EN_CLR;

}
////////////////////////////////write lcd address
//** name     :   lcd_com()
//** function :   write commands to the LCD 
//** input parameter :add
//** output parameter :NULL
//** debugging explanation :
/////////////////////////////////////////////////
void lcd_com(unsigned char add)
{
	RS_CLR;
	EN_SET;
	delay(200);
	PORTC=add;
	delay(200);
	EN_CLR;
}
void lcd_Init()
{
	lcd_com(0x30);//normal function
 	lcd_com(0x01);//clear all
 	lcd_com(0x0f);//on lcd
}





int main(void)
{	
//	unsigned char num;
	unsigned char val;
	unsigned char data[4];
	unsigned char first_on,ok_set;
	DDRB=0X07|DDRB;
 	DDRC=0xff|DDRC;
 	DDRA=0xE0|DDRA;
	RW_CLR;
	lcd_Init();
	
	while(1)
	{
		first_on=ok_set=0x00;
		lcd_com(0x80);
		if(!(PINA & 0x01))/////////////////first check
		{
			first_on=0x01;
		}
		if(first_on)
		{
			delay(100);
			if(!(PINA&0x01))////////////////second check
			{	
				ok_set=0x01;
			}
		}	
		if(ok_set==0x01)
		{
			eeprom_busy_wait(); 
			eeprom_write_byte(0x01,0x01);
			eeprom_busy_wait();       
			eeprom_write_byte(0x02,0x02);
			eeprom_busy_wait(); 
			eeprom_write_byte(0x03,0x03);
			eeprom_busy_wait(); 
			eeprom_write_byte(0x04,0x04);
		}
		eeprom_busy_wait(); 
		data[0]=eeprom_read_byte(0x01);
		lcd_data(xianshi[data[0]]);
		eeprom_busy_wait();       
		data[1]=eeprom_read_byte(0x02);
		lcd_data(xianshi[data[1]]);
		eeprom_busy_wait(); 
		data[2]=eeprom_read_byte(0x03);
		lcd_data(xianshi[data[2]]);
		eeprom_busy_wait(); 
		data[3]=eeprom_read_byte(0x04);
		lcd_data(xianshi[data[3]]);
	}
}


/*
#include<avr/io.h>
#include<avr/iom169.h>
#include <avr/eeprom.h>

unsigned char low10print[640]={};
void delay(int j)
{  
   int i;
   for(i=0;i<j;i++){}
}
void Eeprom_write(unsigned int add,unsigned char data)
{
	while(EECR&(1<<EEWE));
	EEDR=data;
	EEAR=add;
	EECR|(1<<EEWE);
	EECR|=(1<<EEMWE);
	
	while (EECR & 0x02); 
	EEAR=0;
	
}
unsigned char Eeprom_read(unsigned int add)
{
	while(EECR&(1<<EEWE));
	EEAR=add;
	EECR|=(1<<EERE);
	EEAR=0;	
	return EEDR;
}

void main(void)
{
	unsigned int i,eeprom_add;
	unsigned char chari;
//	delay(60000);
//	Eeprom_write(1,0x76);
	chari=Eeprom_read(0x01);
	chari=Eeprom_read(0x02);
	chari=Eeprom_read(0x03);
	chari=Eeprom_read(0x04);

}
*/

/*
#include<avr/io.h>
#include<avr/iom169.h>
#include <avr/eeprom.h> 
unsigned char high11print[704]={};
void main(void)
{
	int i;
	for(i=0;i<704;i++)
	{
		eeprom_busy_wait(); 
		eeprom_write_byte(eeprom_add,high11print[i]);
	}
}
*/