AVR128的程序——DS1302時鐘芯片

#include

#define uchar unsigned char

#define uint unsigned int

#define ds1302_rst PE4 //定義1302的RST接在PE4

#define ds1302_io PE3 //定義1302的IO接在PE3

#define ds1302_sclk PE2 //定義1302的時鐘接在PE2

#define set_ds1302_rst_ddr() DDRE|=1< //復(fù)位端置為輸出

#define set_ds1302_rst() PORTE|=1< //復(fù)位端置1

#define clr_ds1302_rst() PORTE&=~(1< //復(fù)位端清0

#define set_ds1302_io_ddr() DDRE|=1< //數(shù)據(jù)端置為輸出

#define set_ds1302_io() PORTE|=1< //數(shù)據(jù)端置1

#define clr_ds1302_io() PORTE&=~(1< //數(shù)據(jù)端清0

#define clr_ds1302_io_ddr() DDRE&=~(1< //數(shù)據(jù)端置為輸入

#define in_ds1302_io() PINE&(1< //數(shù)據(jù)端輸入數(shù)據(jù)

#define set_ds1302_sclk_ddr() DDRE|=1< //時鐘端置為輸出

#define set_ds1302_sclk() PORTE|=1< //時鐘端置1

#define clr_ds1302_sclk() PORTE &=~(1<//時鐘端清0

#define ds1302_sec_add 0x80 //秒數(shù)據(jù)地址

#define ds1302_min_add 0x82 //分數(shù)據(jù)地址

#define ds1302_hr_add 0x84 //時數(shù)據(jù)地址

#define ds1302_date_add 0x86 //日數(shù)據(jù)地址

#define ds1302_month_add 0x88 //月數(shù)據(jù)地址

#define ds1302_day_add 0x8a //星期數(shù)據(jù)地址

#define ds1302_year_add 0x8c //年數(shù)據(jù)地址

#define ds1302_control_add 0x8e //控制數(shù)據(jù)地址

#define ds1302_charger_add 0x90

#define ds1302_clkburst_add 0xbe

uchar TempData[8];

uchar timer[7]={12,2,8,20,31,50,3};

uchar WeiMa[8] = {0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};

uchar led_discode[11]={0xc0,0xf9,0xa4,0xb0,0x99,

0x92,0x82,0xf8,0x80,0x90,0xff};

void smg_io_init(void)

{

DDRA=0XFF;

PORTA=0XFF;

DDRE=0xff;

PORTE=0X1C;

DDRC=0XFF;

PORTC=0XFF;

DDRF|=0X0E;

PORTF|=0X0E;

PORTF&=0xF7;

DDRB |=0X10;

PORTB|=0X10;

}

void display(uchar FirstBit,uchar Num)

{

unsigned char i;

for(i=0;i

{

PORTC=led_discode[10];

PORTA=WeiMa[i+FirstBit];

PORTC=TempData[i];

Delayms(2);

}

}

void Delayms(uint MS)

{

uint i,j;

for( i=0;i

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

}

void shi_BCD(void)

{

uchar i,k;

for(i=0;i<7;i++)

{

k=timer[i]/10;

timer[i]=timer[i];

timer[i]=timer[i]+k*16;

}

}

void ds1302_init(void)

{

set_ds1302_rst_ddr();

set_ds1302_sclk_ddr();

clr_ds1302_rst();

clr_ds1302_sclk();

}

void ds1302_write(uchar add,uchar data)

{

uchar i=0;

set_ds1302_io_ddr(); //配置IO為輸出

clr_ds1302_rst(); //清復(fù)位，停止所有操作

clr_ds1302_sclk(); //清時鐘，準備操作

set_ds1302_rst(); //置復(fù)位，開始操作

add = add & 0xFE;

for(i=0;i<8;i++) //此循環(huán)寫入控制碼

{

if(add&0x01)

set_ds1302_io(); //當前位為1，置數(shù)據(jù)位

else

clr_ds1302_io(); //當前位為0，清數(shù)據(jù)位

set_ds1302_sclk(); //產(chǎn)生時鐘脈沖，寫入數(shù)據(jù)

clr_ds1302_sclk();

add>>=1; //移位，準備寫入下1位

}

for(i=0;i<8;i++) //此循環(huán)寫入數(shù)據(jù)碼

{

if(data&0x01)

set_ds1302_io();

else

clr_ds1302_io();

set_ds1302_sclk();

clr_ds1302_sclk();

data>>=1;

}

clr_ds1302_rst();

clr_ds1302_io_ddr();

}

uchar ds1302_read(uchar add)

{

uchar data=0;

uchar i=0;

add+=1;

set_ds1302_io_ddr(); //端口輸出

clr_ds1302_rst(); //清復(fù)位

clr_ds1302_sclk(); //清時鐘

set_ds1302_rst(); //置復(fù)位

for(i=0;i<8;i++) //此循環(huán)寫入地址碼

{

if(add&0x01)

{set_ds1302_io();}

else

{clr_ds1302_io();}

set_ds1302_sclk();

clr_ds1302_sclk();

add>>=1;

}

clr_ds1302_io_ddr(); //端口輸入

for(i=0;i<8;i++) //此循環(huán)讀出1302的數(shù)據(jù)

{

data>>=1;

if(in_ds1302_io())

{data|=0x80;}

set_ds1302_sclk();

clr_ds1302_sclk();

}

clr_ds1302_rst();

return(data);

}

void ds1302_write_time(void)

{

ds1302_write(ds1302_control_add,0x00); //關(guān)閉寫保護

ds1302_write(ds1302_sec_add,0x80); //暫停

ds1302_write(ds1302_charger_add,0xa9); //涓流充電

ds1302_write(ds1302_year_add,timer[0]); //年

ds1302_write(ds1302_month_add,timer[1]); //月

ds1302_write(ds1302_date_add,timer[2]); //日

ds1302_write(ds1302_day_add,timer[6]); //周

ds1302_write(ds1302_hr_add,timer[3]); //時

ds1302_write(ds1302_min_add,timer[4]); //分

ds1302_write(ds1302_sec_add,timer[5]); //秒

ds1302_write(ds1302_control_add,0x80); //打開寫保護

}

void ds1302_read_time(void)

{

timer[0]=ds1302_read(ds1302_year_add); //年

timer[1]=ds1302_read(ds1302_month_add); //月

timer[2]=ds1302_read(ds1302_date_add); //日

timer[6]=ds1302_read(ds1302_day_add); //周

timer[3]=ds1302_read(ds1302_hr_add); //時

timer[4]=ds1302_read(ds1302_min_add); //分

timer[5]=ds1302_read(ds1302_sec_add); //秒

}

void time_Process(void)

{

TempData[0] = led_discode[timer[3]/16];

TempData[1] = led_discode[timer[3]];

TempData[2] = 0XBF;

TempData[3] = led_discode[timer[4]/16];

TempData[4] = led_discode[timer[4]];

TempData[5] = 0XBF;

TempData[6] = led_discode[timer[5]/16];

TempData[7] = led_discode[timer[5]];

}

void main(void)

{

uchar i;

smg_io_init();

shi_BCD();

ds1302_init();

ds1302_write_time();

while(1)

{

ds1302_read_time();

time_Process();

display(0,8);

}

}