#include "ds1302.h"
struct DS1302DATA ds1302Data = {0,0,0,0,0,0,0};
u8 ascii_time[7] = {0};
//保存ascii格式数据
u8 bcd_time[7] = {0};
//保存bcd码数据
static u8 AsciiToBcd(u8 asciiData)
{
u8 bcdData = 0;
bcdData = (((asciiData/10)<<4)|((asciiData%10)));
return bcdData;
}
static u8 BcdToAscii(u8 bcdData)
{
u8 asciiData = 0;
asciiData = (((bcdData&0xf0)>>4)*10 + (bcdData&0x0f));
return asciiData;
}
//IO口初始化
void Ds1302_Gpio_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);
//RST
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//推挽输出
GPIO_Init(GPIOD, &GPIO_InitStructure);
//CLK
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//推挽输出
GPIO_Init(GPIOD, &GPIO_InitStructure);
//IO
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_11;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//推挽输出
GPIO_Init(GPIOD, &GPIO_InitStructure);
}
//读取一个字节的时序
u8 Ds1302_ReadByte(void)
{
u8 i = 0, dat = 0;
DS1302_DAT_INPUT();
delayUs(5);
for(i = 0; i <8; i++)
{
dat >>= 1;
if(DS1302_DATIN == 1)dat |= 0x80;
DS1302_CLK = 1;
delayUs(2);
DS1302_CLK = 0;
delayUs(2);
}
return dat;
}
//写入一个字节的时序
void Ds1302_WriteByte(u8 dat)
{
u8 i = 0, data = dat;
DS1302_DAT_OUTPUT();
DS1302_CLK = 0;
delayUs(2);
for(i = 0; i < 8; i++)
{
DS1302_DATOUT = data&0x01;
delayUs(2);
DS1302_CLK = 1;
delayUs(2);
DS1302_CLK = 0;
data >>= 1;
}
}
//写入一个寄存器
void Ds1302_Write(u8 address,u8 dat)
{
DS1302_RST = 0;
DS1302_CLK = 0;
DS1302_RST = 1;
Ds1302_WriteByte(address);
Ds1302_WriteByte(dat);
DS1302_CLK = 1;
DS1302_RST = 0;
}
//单个写入时间
void Ds1302_Write_Time_Singel(u8 address,u8 dat)
{
Ds1302_Write(DS1302_CONTROL_REG,0x00); //取消写保护
Ds1302_Write(address,dat);
Ds1302_Write(DS1302_CONTROL_REG,0x80); //打开写保护
}
//一次完成所有时间更新
//start当前时钟运行还是停止
void Ds1302_Write_Time_All(u8 start)
{
Ds1302_Write(DS1302_CONTROL_REG,0x00);
//取消写保护
Ds1302_Write(DS1302_SEC_REG,(AsciiToBcd(ds1302Data.sec)|start));
Ds1302_Write(DS1302_MIN_REG,AsciiToBcd(ds1302Data.min));
Ds1302_Write(DS1302_HR_REG,AsciiToBcd(ds1302Data.hour));
Ds1302_Write(DS1302_DATE_REG,AsciiToBcd(ds1302Data.day));
Ds1302_Write(DS1302_MONTH_REG,AsciiToBcd(ds1302Data.month));
Ds1302_Write(DS1302_DAY_REG,AsciiToBcd(ds1302Data.week));
Ds1302_Write(DS1302_YEAR_REG,AsciiToBcd(ds1302Data.year));
Ds1302_Write(DS1302_CONTROL_REG,0x80); //打开写保护
}
//读取一个字节
u8 Ds1302_Read(u8 address)
{
u8 data = 0;
DS1302_RST = 0;
DS1302_CLK = 0;
DS1302_RST = 1;
Ds1302_WriteByte(address|0x01); //读取地址需要与0x01相或，最低为变成1
data = Ds1302_ReadByte();
DS1302_CLK = 1;
DS1302_RST = 0;
return data;
}
//读取时间的时候默认让时间走起来
void Ds1302_Readtime(void)
{
ds1302Data.sec = BcdToAscii(Ds1302_Read(DS1302_SEC_REG)); //秒
ds1302Data.min = BcdToAscii(Ds1302_Read(DS1302_MIN_REG)); //分
ds1302Data.hour = BcdToAscii(Ds1302_Read(DS1302_HR_REG)); //小时
ds1302Data.day = BcdToAscii(Ds1302_Read(DS1302_DATE_REG)); //日
ds1302Data.month = BcdToAscii(Ds1302_Read(DS1302_MONTH_REG)); //月
ds1302Data.week = BcdToAscii(Ds1302_Read(DS1302_DAY_REG)); //星期几
ds1302Data.year = BcdToAscii(Ds1302_Read(DS1302_YEAR_REG)); //年
}
DS1302有下列几组寄存器：
DS1302 ①有关日历、时间的寄存器共有12个，其中有7个寄存器
（读时81h～8Dh，写时80h～8Ch），存放的数据格式为BCD码形式,我们读取之后需要修改为acsii码模式,如下
