//读出时间
void DS1302_GetTime(SYSTEMTIME *Time){
unchar ReadValue;
ReadValue = Read1302(DS1302_SECOND);
Time->Second = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0f);
ReadValue = Read1302(DS1302_MINUTE);
Time->Minute = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0f);
ReadValue = Read1302(DS1302_HOUR);
Time->Hour = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0f);
}
void InitClock(void)
{
uint8_t tmp;
uint8_t flag;
flag=Read1302(0x81);
if(flag&0x80)
{ //判断时钟芯片是否关闭
Write1302(0x8E,0x00); //根据写状态寄存器命令字，写入不保护指令
Write1302(0x80,((51/10)<<4|(51%10))); //根据写秒寄存器命令字，写入秒的初始值
Write1302(0x82,((2/10)<<4|(2%10))); //根据写分寄存器命令字，写入分的初始值
Write1302(0x84,((12/10)<<4|(12%10))); //根据写小时寄存器命令字，写入小时的初始值
Write1302(0x86,((27/10)<<4|(27%10))); //根据写日寄存器命令字，写入日的初始值
Write1302(0x88,((7/10)<<4|(7%10))); //根据写月寄存器命令字，写入月的初始值
Write1302(0x8c,((15/10)<<4|(15%10))); //根据写年寄存器命令字，写入年的初始值
Write1302(0x8E,0x80); //根据写状态寄存器命令字，写入保护指令
}
tmp = ReadDS1302Ram(0);
if(tmp^0xa5)
{
WriteDS1302Ram(0,0xa5);
Write1302(DS1302_WRITE,0x00); //关闭写保护
Write1302(0x90,0x03); //禁止涓流充电
Write1302(DS1302_HOUR,0x00); //设置成24小时制
Write1302(DS1302_SECOND,0x00); //使能时钟运行
Write1302(DS1302_WRITE,0x80); //打开写保护
}
}
//初始化DS1302
void DS1302_Initial (void)
{
unchar Second=Read1302(DS1302_SECOND);
if(Second&0x80)//bit7=CH CH=0 振荡器允许工作,CH=1振荡器停止工作
DS1302_SetTime(DS1302_SECOND,0);
}
/*
读取DS1302中的RAM
addr:地址,从0到30,共31个字节的空间
返回为所读取的数据
*/
uint8_t ReadDS1302Ram(uint8_t addr)
{
uint8_t tmp,res;
tmp = (addr<<1)|0xc0;
res = Read1302(tmp);
return(res);
}
/*
读取DS1302中的RAM
addr:地址,从0到30,共31个字节的空间
返回为所读取的数据
*/
u8 ReadDS1302Ram(u8 addr)
{
u8 tmp,res;
tmp = (addr<<1)|0xc0;
res = Read1302(tmp);
return(res);
}
/*****************************************************
函数功能：根据命令字，从1302读取一个字节数据
入口参数：Cmd
***************************************************/
uchar ReadSet1302(uchar Cmd)
{
uchar dat;
RST=0; //拉低RST
SCLK=0; //确保写数居前SCLK被拉低
RST=1; //启动数据传输
Write1302(Cmd); //写入命令字
dat=Read1302(); //读出数据
SCLK=1; //将时钟电平置于已知状态
RST=0; //禁止数据传递
return dat; //将读出的数据返回
}
//读取时间函数
void DS1302_GetTime(uint8_t *time)
{
time[0] = Read1302(DS1302_YEAR);
time[1] = Read1302(DS1302_WEEK);
time[2] = Read1302(DS1302_MONTH);
time[3] = Read1302(DS1302_DAY);
time[4] = Read1302(DS1302_HOUR);
time[5] = Read1302(DS1302_MINUTE);
time[6] = Read1302(DS1302_SECOND);
}
/*****************************************************
函数功能：根据命令字，从1302读取一个字节数据
入口参数：Cmd
***************************************************/
UINT8 Ds1302_Read_Byte(UINT8 Cmd)
{
UINT8 ucData;
DS1302_RST = 0;
DS1302_CLK = 0;
DS1302_RST = 1; //enable
Write1302(Cmd|0x01); // 地址，命令
ucData = Read1302(); // 读1Byte数据
DS1302_CLK = 1; //RST 0->1->0,CLK 0->1
DS1302_RST = 0;
return(ucData);
}
//读出时间
void DS1302_GetTime(SYSTEMTIME *Time)
{
unchar ReadValue;
ReadValue = Read1302(DS1302_SECOND);
Time->Second = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0f);
ReadValue = Read1302(DS1302_MINUTE);
Time->Minute = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0f);
ReadValue = Read1302(DS1302_HOUR);
Time->Hour = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0f);
ReadValue = Read1302(DS1302_DAY);
Time->Day = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0f);
ReadValue = Read1302(DS1302_WEEK);
Time->Week = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0f);
ReadValue = Read1302(DS1302_MONTH);
Time->Month = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0f);
ReadValue = Read1302(DS1302_YEAR);
Time->Year = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0f);
}