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| #include "ds1302.h"
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| void Write_Ds1302(unsigned char temp)
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| {
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| unsigned char i;
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| for (i=0;i<8;i++)
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| {
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| SCK = 0;
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| SDA = temp&0x01;
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| temp>>=1;
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| SCK=1;
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| }
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| }
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| void Write_Ds1302_Byte( unsigned char address,unsigned char dat )
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| {
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| RST=0; _nop_();
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| SCK=0; _nop_();
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| RST=1; _nop_();
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| Write_Ds1302(address);
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| Write_Ds1302(dat);
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| RST=0;
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| }
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| unsigned char Read_Ds1302_Byte ( unsigned char address )
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| {
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| unsigned char i,temp=0x00;
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| RST=0; _nop_();
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| SCK=0; _nop_();
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| RST=1; _nop_();
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| Write_Ds1302(address);
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| for (i=0;i<8;i++)
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| {
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| SCK=0;
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| temp>>=1;
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| if(SDA)
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| temp|=0x80;
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| SCK=1;
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| }
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| RST=0; _nop_();
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| SCK=0; _nop_();
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| SCK=1; _nop_();
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| SDA=0; _nop_();
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| SDA=1; _nop_();
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| return (temp);
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| }
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| void write_ds13(unsigned char *ds_time)
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| {
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| unsigned char temp;
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| Write_Ds1302_Byte(0x8e,0x00);
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| temp=(ds_time[0]/10*16)|(ds_time[0]%10);
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| Write_Ds1302_Byte(0x80,temp);
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| temp=(ds_time[1]/10*16)|(ds_time[1]%10);
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| Write_Ds1302_Byte(0x82,temp);
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| temp=(ds_time[2]/10*16)|(ds_time[2]%10);
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| Write_Ds1302_Byte(0x84,temp);
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| Write_Ds1302_Byte(0x8e,0x80);
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| }
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| void read_ds13(unsigned char *ds_time)
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| {
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| unsigned char temp;
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| temp=Read_Ds1302_Byte(0x81);
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| ds_time[0]=((temp>>4)*10)+(temp&0x0f);
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| temp=Read_Ds1302_Byte(0x83);
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| ds_time[1]=((temp>>4)*10)+(temp&0x0f);
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| temp=Read_Ds1302_Byte(0x85);
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| ds_time[2]=((temp>>4)*10)+(temp&0x0f);
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| }
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