AVR128的程序——DS18B20與12864液晶時鐘綜合運用

for(j=0;j<1141;j++);

}

void write_12864com(uchar com)

{

rwclr;

rsclr;

Delayus(500);

PORTA=com;

enset;

Delayus(1000);

enclr;

Delayus(1000);

}

void write_12864dat(uchar dat)

{

rwclr;

rsset;

Delayus(500);

PORTA=dat;

enset;

Delayus(1000);

enclr;

Delayus(1000);

}

void init12864lcd(void)

{

Delayms(500);

write_12864com(0x30);

Delayus(500);

write_12864com(0x30);

Delayus(500);

write_12864com(0x0f);

Delayus(500);

write_12864com(0x01);

Delayms(25);

write_12864com(0x06);

Delayus(2500);

write_12864com(0x0c);

Delayus(500);

}

void display(void)

{

uchar i;

write_12864com(0x80);

for(i=0;i<16;i++)

{

write_12864dat(table1[i]);

Delayms(10);

}

}

void display1(void)

{

uchar i;

write_12864com(0x90);

for(i=0;i<16;i++)

{

write_12864dat(table2[i]);

Delayms(10);

}

}

void display2(void)

{

uchar i;

write_12864com(0x88);

for(i=0;i<12;i++)

{

write_12864dat(table3[i]);

Delayms(10);

}

}

void display3(void)

{

uchar i;

write_12864com(0x98);

for(i=0;i<14;i++)

{

write_12864dat(table4[i]);

Delayms(10);

}

}

void write_sfm(uchar add,uchar date)

{

uchar shi,ge;

shi=date/10;

ge=date;

write_12864com(add);

write_12864dat(0x30+shi);

write_12864dat(0x30+ge);

}

void write_wendu(uchar add,uchar date)

{

uchar shi,ge;

shi=date/10;

ge=date;

write_12864com(add);

write_12864dat(0x30+shi);

write_12864dat(0x30+ge);

}

unsigned char ds1820_reset(void)

{

unsigned char i;

DQ_OUT;

DQ_CLR;

Delayus(500);

DQ_SET;

DQ_IN;

Delayus(100);

i = DQ_R;

Delayus(500);

return i;

}

unsigned char ds1820_read_byte(void)

{

unsigned char i;

unsigned char value = 0;

for (i = 0; i < 8; i++)

{

value >>= 1;

DQ_OUT;

DQ_CLR;

Delayus(10);

DQ_SET;

DQ_IN;

if (DQ_R) value|=0x80;

Delayus(60);

}

return value;

}

void ds1820_write_byte(unsigned char value)

{

unsigned char i;

for (i = 0; i < 8; i++)

{

DQ_OUT;

DQ_CLR;

Delayus(10);

if (value & 0x01) DQ_SET;

Delayus(100);

DQ_SET;

value >>= 1;

}

}

void main(void)

{

uchar i,j;

uint temp;

mcu_init();

init12864lcd();

timer1_init();

SEI();

display();

display1();

display2();

display3();

while(1)

{

write_sfm(0x8D,num);

write_sfm(0x8B,fen);

write_sfm(0x89,shi);

write_sfm(0x86,ri);

write_sfm(0x84,yue);

ds1820_reset();

ds1820_write_byte(0xCC);

ds1820_write_byte(0x44);

Delayms(2);

ds1820_reset();

ds1820_write_byte(0xCC);

ds1820_write_byte(0xbe);

i=ds1820_read_byte();

j=ds1820_read_byte();

temp=j*256+i;

temp=temp*0.0625;

write_wendu(0x96,temp);

}

}

void mcu_init(void)

{

DDRA = 0XFF;

PORTA = 0XFF;

DDRC = 0XFF;

PORTC = 0XFF;

DDRF |= 0X0E;

PORTF |= 0X0E;

PORTF &= 0xF0;

DDRB |= 0X10;

PORTB |= 0X10;

psbset;

rsout;

rwout;

enout;

}

#pragma interrupt_handler timer1_ovf_isr:15

void timer1_ovf_isr(void)

{

TCNT1H = 0xE1;

TCNT1L = 0x7C;

num++;

if(num==60)

{

num=0;

fen++;

if(fen==60)

{

fen=0;

shi++;

if(shi==24)

{

shi=0;

ri++;

if(ri==32)

{

ri=1;

yue++;

}

}

}

}