#include "DS1302.h"

//延時函數
void DS1302_Delay(unsigned int dtime) 
{
 unsigned int temp;
 for(temp=0;temp<dtime;temp++);
}

//DS1302復位
void DS1302_Reset(void) 
{
 DS1302_DIR |= (DS1302_RST + DS1302_SCLK);
 DS1302_SCLK_LO;
 DS1302_RST_LO;
 DS1302_Delay(10);
 DS1302_SCLK_HI;
}

//向DS1302寫入一個字節
void DS1302_WriteOneByte(unsigned char w_dat) 
{
 unsigned char temp;
 
 DS1302_RST_HI;
 DS1302_DIR |= DS1302_SDI;
 
 for(temp=8;temp>0;temp--) 
 {
  DS1302_SDI_LO;
  if(w_dat&BIT0) DS1302_SDI_HI;
  DS1302_SCLK_LO;
  DS1302_Delay(10);
  DS1302_SCLK_HI;
  DS1302_Delay(10);
  w_dat >>=1;
 } 
}

//從DS1302中讀取一個字節
unsigned char DS1302_ReadOneByte(void)
{ 
 unsigned char temp,rdata;
 rdata = 0x00;
 
 DS1302_RST_HI;
 DS1302_DIR &= ~DS1302_SDI;
 
 for(temp=0;temp<8;temp++){rdata >>= 1;//將移位放到前面，否則讀不到最高一位
  DS1302_SCLK_HI;
  DS1302_Delay(10);
  DS1302_SCLK_LO;
  DS1302_Delay(10);
  if((DS1302_IN&DS1302_SDI)==DS1302_SDI)
   rdata |= BIT7;
  //rdata >>= 1;
 }
 
 return(rdata); 
}

//向DS1302中寫入地址后寫入數據
void DS1302_WriteData(unsigned char addr,unsigned char w_dat)
{
 DS1302_RST_LO;
 DS1302_SCLK_LO;
 DS1302_RST_HI;
 
 DS1302_WriteOneByte(addr);  //寫入地址
 DS1302_WriteOneByte(w_dat);  //寫入數據
 
 DS1302_SCLK_HI;
 DS1302_RST_LO;
} 

//向DS1302寫入地址后,從DS1302中讀取數據
unsigned char DS1302_ReadData(unsigned char addr)
{
 unsigned char r_dat;
 DS1302_RST_LO;
 DS1302_SCLK_LO;
 DS1302_RST_HI;
 
 DS1302_WriteOneByte(addr);  //寫入地址
 r_dat = DS1302_ReadOneByte();  //讀出數據
 
 DS1302_SCLK_LO;
 DS1302_RST_LO;
 
 return(r_dat);
}

//按照SettingData的設置設置DS1302的時間
void DS1302_SettingData(unsigned char *Setting_Time) 
{
 unsigned char temp;
 unsigned char addr = 0x8C;
 
 DS1302_WriteData(0x8E,0x00);  //寫入控制命令,禁用寫保護

 for(temp=0;temp<7;temp++) {
  DS1302_WriteData(addr,Setting_Time[temp]);
  addr -= 2;
 }
 
 DS1302_WriteData(0x8E,0x80);  //寫入控制命令,啟用寫保護
}

//讀取DS1302時間到ReadingData中
void DS1302_GetData(unsigned char *str) 
{
 unsigned char i;
 unsigned char addr = 0x8D;
// unsigned char temp,temp1;  

 for(i=0;i<7;i++) 
 {
    str[i] = DS1302_ReadData(addr);//年
    addr -= 2;
 }
}