AVR的EEPROM简单实验

#include

#define uchar unsigned char
#define uint unsigned int

__flash uchar seg[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
__flash uchar tab[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};

#define EEWE 1
#define EERE 0
#define EEMWE 2

#define k1 PIND_Bit4 //地址变化键
#define k2 PIND_Bit5 //数据变化键
#define k3 PIND_Bit6 //地址写入
#define k4 PIND_Bit7 //地址读出

void delay(uint k) //延迟函数
{
uint i,j;
for(i=0;ifor(j=0;j<1140;j++);
}

void key1()
{
static uchar i,j;
if(k1==0)
{
if(i==0)
{
j++;
if(j>3)
{
if(k1==0)
{
i=1;j=0;
address++;
}
}
}
}
else
{
i=0;j=0;
}
}

void key2()
{
static uchar i,j;
if(k2==0)
{
if(i==0)
{
j++;
if(j>3)
{
if(k2==0)
{
i=1;j=0;
data++;
}
}
}
}
else
{
i=0;j=0;
}
}

void show_val(uint k) //显示数值函数
{
static uchar i=0,j;
uchar ss[6];
do
{
ss[i]=k%10;
i++;
}while(k/=10);
for(j=0;j{
PORTA=seg[ss[j]];
PORTC=tab[j];
delay(1);
PORTA=0xff;
PORTC=0xff;
}
i=0;
}

void show_address(uint k) //显示数值函数
{
static uchar i=0,j;
uchar ss[6];
do
{
ss[i]=k%10;
i++;
}while(k/=10);
for(j=0;j{
PORTA=seg[ss[j]];
PORTC=tab[j+3];
delay(1);
PORTA=0xff;
PORTC=0xff;
}
i=0;
}

void show_data(uint k) //显示数值函数
{
static uchar i=0,j;
uchar ss[6];
do
{
ss[i]=k%10;
i++;
}while(k/=10);
for(j=0;j{
PORTA=seg[ss[j]];
PORTC=tab[j+6];
delay(1);
PORTA=0xff;
PORTC=0xff;
}
i=0;
}

#include "1602.h"

void port_init() //端口初始化
{
PORTA=0xff;
DDRA=0xff;
PORTB=0xff;
DDRB=0xff;
PORTC=0xff;
DDRC=0xff;
PORTD=0xff;
DDRD=0x0f;
}

void write_EEPROM(uchar address,uchar data) //写入EEPROM函数
{
while(EECR&(1EEAR=address;
EEDR=data;
EECR|=(1EECR|=(1}

uchar receive_EEPROM(uchar address) //读取EEPROM操作
{
while(EECR&(1EEAR=address;
EECR|=(1return EEDR;
}

void key3()
{
static uchar i,j;
if(k3==0)
{
if(i==0)
{
j++;
if(j>3)
{
if(k3==0)
{
i=1;j=0;
write_EEPROM(address,data);
}
}
}
}
else
{
i=0;j=0;
}
}

void key4()
{
static uchar i,j;
if(k4==0)
{
if(i==0)
{
j++;
if(j>3)
{
if(k4==0)
{
i=1;j=0;
val=receive_EEPROM(address);
}
}
}
}
else
{
i=0;j=0;
}
}

void main()
{
port_init();

write_EEPROM(address,data);
val=receive_EEPROM(address);

while(1)
{
show_val(val); //显示数据值
show_address(address); //显示数据地址
show_data(data); //显示需要写入的数据地址
key1(); //改变数据地址
key2(); //改变准备写入的数据值
key3();//把数据写入地址中
key4();//读出地址值
}
}