ATMEGA16驅(qū)動(dòng)內(nèi)部EEPROM程序

// 顯示效果:顯示按鍵設(shè)定數(shù)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(shí)
{
uint i,j;
for(i=0;i {
for(j=0;j<1142;j++);
}
}
void write_com(uchar com) //寫(xiě)指令
{
PORTD&=~BIT(4);
PORTD&=~BIT(5);
PORTC=com;
PORTD|=BIT(6);
delay(1);
PORTD&=~BIT(6);
}

void write_dat(uchar dat) //寫(xiě)數(shù)據(jù)
{
PORTD|=BIT(4);
PORTD&=~BIT(5);
PORTC=dat;
PORTD|=BIT(6);
delay(1);
PORTD&=~BIT(6);
}

/*EEPROM讀取函數(shù)*/
/*addr：地址；number：長(zhǎng)度；p_buff：讀出數(shù)據(jù)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(xiě)入函數(shù)*/
/*addr：地址；number：長(zhǎng)度；p_buff：寫(xiě)入數(shù)據(jù)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(shè)為輸入
PORTB = 0x0f; //PB口低四位上拉電阻使能
DDRC=0XFF; //液晶端口設(shè)定為輸出
DDRD|=BIT(4)|BIT(5)|BIT(6);

delay(250); //加入延時(shí),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(kāi)顯示
delay(5);
// write_com(0X0F); //顯示光標(biāo)并閃爍
// delay(5);
delay(250); //啟動(dòng)延時(shí)
eprom_read(0x10, 0x01, &temp);//讀出記錄

while(1)
{
if(PINB==0x0e) //PB0按鍵檢測(cè)
{
delay(250); //啟動(dòng)延時(shí)
eprom_read(0x10, 0x01, &temp);//讀出記錄
temp++; //刷新記錄
eprom_write(0x10, 0x01, &temp);//寫(xiě)入記錄
}
while(PINB==0x0e); //當(dāng)按鍵始終按下時(shí)等待

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

delay(5);
ge=temp%10;
shi=temp%100/10;
bai=temp/100;
write_com(0X80+0X06);//數(shù)據(jù)起始指針設(shè)置--重新設(shè)置為這個(gè)地址開(kāi)始存放數(shù)據(jù)
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(shù)據(jù)起始指針設(shè)置
delay(5);
for(i=0;i<16;i++) //循環(huán)13次顯示內(nèi)容
{
write_dat(table1[i]);
delay(5);
}
/*
for(i=0;i<16;i++) //循環(huán)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(guò)驗(yàn)證，運(yùn)行穩(wěn)定??！