ATMEGA16驅動內部EEPROM程序

// 顯示效果:顯示按鍵設定數字
#include
#include
#define uchar unsigned char
#define uint unsigned int
#pragmadata:code
const uchar table[]="I LIKE AVR !";
const uchar table1[]="WWW*FUMANCHE*COM";
const uchar table_num[]="01234567890";

void delay(uint ms)//延時
{
uint i,j;
for(i=0;i {
for(j=0;j<1142;j++);
}
}
void write_com(uchar com) //寫指令
{
PORTD&=~BIT(4);
PORTD&=~BIT(5);
PORTC=com;
PORTD|=BIT(6);
delay(1);
PORTD&=~BIT(6);
}

void write_dat(uchar dat) //寫數據
{
PORTD|=BIT(4);
PORTD&=~BIT(5);
PORTC=dat;
PORTD|=BIT(6);
delay(1);
PORTD&=~BIT(6);
}

/*EEPROM讀取函數*/
/*addr：地址；number：長度；p_buff：讀出數據存放指針*/

void eprom_read(unsigned int addr, unsigned char number, unsigned char *p_buff)
{

while(EECR & (1 << EEWE));

EEARH = 0x00;

while(number --)
{
EEARL = addr ++;
EECR |= (1 << EERE);
*p_buff++ = EEDR;
}
}
/*EEPROM寫入函數*/
/*addr：地址；number：長度；p_buff：寫入數據存放指針*/

void eprom_write(unsigned int addr, unsigned char number, unsigned char *p_buff)
{

EEARH = 0x00;

while(number --) {
while(EECR & (1 << EEWE));
EEARL = addr ++;
EEDR = *p_buff ++;
EECR |= (1 << EEMWE);
EECR |= (1 << EEWE);
}
}

void main()
{

uchar i;
uchar bai,shi,ge,temp;
DDRB = 0xf0; //PB口低四位設為輸入
PORTB = 0x0f; //PB口低四位上拉電阻使能
DDRC=0XFF; //液晶端口設定為輸出
DDRD|=BIT(4)|BIT(5)|BIT(6);

delay(250); //加入延時,避免影響干擾下一句
PORTD&=~BIT(6);

write_com(0X38); //液晶初始化
delay(5);
write_com(0X01); //顯示清屏
delay(5);
write_com(0X0C); //開顯示
delay(5);
// write_com(0X0F); //顯示光標并閃爍
// delay(5);
delay(250); //啟動延時
eprom_read(0x10, 0x01, &temp);//讀出記錄

while(1)
{
if(PINB==0x0e) //PB0按鍵檢測
{
delay(250); //啟動延時
eprom_read(0x10, 0x01, &temp);//讀出記錄
temp++; //刷新記錄
eprom_write(0x10, 0x01, &temp);//寫入記錄
}
while(PINB==0x0e); //當按鍵始終按下時等待

if(PINB==0x0d) //PB1按鍵檢測
{
delay(250); //啟動延時
eprom_read(0x10, 0x01, &temp);//讀出記錄
temp--; //刷新記錄
eprom_write(0x10, 0x01, &temp);//寫入記錄
}
while(PINB==0x0d);

delay(5);
ge=temp%10;
shi=temp%100/10;
bai=temp/100;
write_com(0X80+0X06);//數據起始指針設置--重新設置為這個地址開始存放數據
write_dat(table_num[bai]);
delay(5);
write_dat(table_num[shi]);
delay(5);
write_dat(table_num[ge]);
delay(5);

write_com(0X80+0X40);//數據起始指針設置
delay(5);
for(i=0;i<16;i++) //循環13次顯示內容
{
write_dat(table1[i]);
delay(5);
}
/*
for(i=0;i<16;i++) //循環16次從LCD屏幕左邊一直顯示到右邊
{
write_com(0X1c);
delay(500);
}
*/

}
}
//本程序通過驗證，運行穩定！！