AVR DS1302源程序

//mega16 7.3728MHz石英晶体 iccavr6.31a

//相关界说：

#define uint unsigned int

#define uchar unsigned char

#define DS1302_RST 0 //pc0

#define DS1302_SDA 1 //pc1

#define DS1302_SCLK 6 //pc6

//ds1302相关

//DS1302_RST=1

#define Set_DS1302_RST() PORTC|=1<

//DS1302_RST=0

#define Clr_DS1302_RST() PORTC&=~(1<

//DS1302_SDA=1

#define Set_DS1302_SDA() PORTC|=1<

//DS1302_SDA=0

#define Clr_DS1302_SDA() PORTC&=~(1<

//DS1302_SCLK=1

#define Set_DS1302_SCLK() PORTC|=1<

//DS1302_SCLK=0

#define Clr_DS1302_SCLK() PORTC&=~(1<

//DS1302deSDA置为输出脚

#define Set_DS1302_DDRSDA() DDRC|=1<

//DS1302deSDA置为输入脚

#define Clr_DS1302_DDRSDA() DDRC&=~(1<

#define DS1302_SEC_Reg 0x80

#define DS1302_MIN_Reg 0x82

#define DS1302_HR_Reg 0x84

#define DS1302_DATE_Reg 0x86

#define DS1302_MONTH_Reg 0x88

#define DS1302_DAY_Reg 0x8a

#define DS1302_YEAR_Reg 0x8c

#define DS1302_CONTROL_Reg 0x8e

#define DS1302_CHARGER_Reg 0x90

#define DS1302_CLKBURST_Reg 0xbe

//全局变量

//为了便利，我把个位和十位分开了

uchar year1=0x88;

uchar year0=0x88;

uchar month1=0x88;

uchar month0=0x88;

uchar date0=0x88;

uchar date1=0x88;

uchar day=0x88;

uchar hour1=0x88;

uchar hour0=0x88;

uchar minute1=0x88;

uchar minute0=0x88;

uchar second1=0x88;

uchar second0=0x88;

//自程序开端

void DS1302_Write(uchar reg,uchar data)

{

uchar i;

Set_DS1302_DDRSDA();

Clr_DS1302_RST();

asm(“nop”);

asm(“nop”);

Clr_DS1302_SCLK();

asm(“nop”);

asm(“nop”);

Set_DS1302_RST();

asm(“nop”);

asm(“nop”);

for(i=8;i>0;i–)

{

if(reg&0x01) Set_DS1302_SDA();

else Clr_DS1302_SDA();

asm(“nop”);

asm(“nop”);

Set_DS1302_SCLK();

asm(“nop”);

asm(“nop”);

Clr_DS1302_SCLK();

asm(“nop”);

asm(“nop”);

reg>>=1;

}

for(i=8;i>0;i–)

{

if(data&0x01) Set_DS1302_SDA();

else Clr_DS1302_SDA();

asm(“nop”);

asm(“nop”);

Set_DS1302_SCLK();

asm(“nop”);

asm(“nop”);

Clr_DS1302_SCLK();

asm(“nop”);

asm(“nop”);

data>>=1;

}

Clr_DS1302_RST();

asm(“nop”);

asm(“nop”);

Clr_DS1302_DDRSDA();

}

uchar DS1302_Read(uchar reg)

{

uchar data=0,i;

reg+=1;//读标志

Set_DS1302_DDRSDA();

Clr_DS1302_RST();

asm(“nop”);

asm(“nop”);

Clr_DS1302_SCLK();

asm(“nop”);

asm(“nop”);

Set_DS1302_RST();

asm(“nop”);

asm(“nop”);

for(i=8;i>0;i–)

{

if(reg&0x01) Set_DS1302_SDA();

else Clr_DS1302_SDA();

asm(“nop”);

asm(“nop”);

Set_DS1302_SCLK();

asm(“nop”);

asm(“nop”);

Clr_DS1302_SCLK();

asm(“nop”);

asm(“nop”);

reg>>=1;

}

Clr_DS1302_DDRSDA();

for(i=8;i>0;i–)

{

data>>=1;

if((PINC&(1<ta|=0x80;

Set_DS1302_SCLK();

asm(“nop”);

asm(“nop”);

Clr_DS1302_SCLK();

asm(“nop”);

asm(“nop”);

}

Clr_DS1302_RST();

asm(“nop”);

asm(“nop”);

return(data);

}

uchar Check_DS1302(void)

{

DS1302_Write(DS1302_CONTROL_Reg,0x80);

if(DS1302_Read(DS1302_CONTROL_Reg)==0x80) return 1;

return 0;

}

void DS1302_Init(void)

{

DS1302_Write(DS1302_CONTROL_Reg,0x00);//封闭写保护

DS1302_Write(DS1302_SEC_Reg,0x80);//暂停

DS1302_Write(DS1302_CHARGER_Reg,0xa9);//涓流充电

DS1302_Write(DS1302_YEAR_Reg,0x04); //年

DS1302_Write(DS1302_MONTH_Reg,0x12); //月

DS1302_Write(DS1302_DATE_Reg,0x09); //日

DS1302_Write(DS1302_DAY_Reg,0x04); //周

DS1302_Write(DS1302_HR_Reg,0x10); //时

DS1302_Write(DS1302_MIN_Reg,0x25); //分

DS1302_Write(DS1302_SEC_Reg,0x00); //秒

DS1302_Write(DS1302_CONTROL_Reg,0x80);//翻开写保护

}

void ReadTime(void)

{

uchar data;

data=DS1302_Read(DS1302_YEAR_Reg);//年

year0=data&0x0f;

year1=data>>4;

data=DS1302_Read(DS1302_MONTH_Reg);//月

month0=data&0x0f;

month1=(data>>4)&0x01;

data=DS1302_Read(DS1302_DATE_Reg);//日

date0=data&0x0f;

date1=(data>>4)&0x03;

data=DS1302_Read(DS1302_DAY_Reg);//周

day=data&0x07;

data=DS1302_Read(DS1302_HR_Reg);//时

hour0=data&0x0f;

hour1=(data>>4)&0x03;

data=DS1302_Read(DS1302_MIN_Reg);//分

minute0=data&0x0f;

minute1=(data>>4)&0x07;

data=DS1302_Read(DS1302_SEC_Reg);//秒

second0=data&0x0f;

second1=(data>>4)&0x07;

}