keil ds1302实时时钟代码
时间: 2023-09-28 21:04:22 浏览: 54
以下是Keil DS1302实时时钟的代码示例:
```c
#include <reg51.h>
#include <stdio.h>
#define uchar unsigned char
#define uint unsigned int
sbit DS1302_CLK = P2^0;
sbit DS1302_DAT = P2^1;
sbit DS1302_RST = P2^2;
void DS1302_Write_Byte(uchar wbyte, uchar addr);
uchar DS1302_Read_Byte(uchar addr);
void DS1302_Set_Time(uchar hour, uchar minute, uchar second);
void DS1302_Get_Time(uchar *hour, uchar *minute, uchar *second);
void main()
{
uchar hour, minute, second;
// 初始化DS1302
DS1302_Write_Byte(0x8e, 0);
DS1302_Write_Byte(0x00, 7);
// 设置时间
DS1302_Set_Time(12, 30, 0);
// 读取时间
DS1302_Get_Time(&hour, &minute, &second);
// 显示时间
printf("%d:%d:%d", hour, minute, second);
}
void DS1302_Write_Byte(uchar wbyte, uchar addr)
{
uchar i;
DS1302_RST = 1;
DS1302_CLK = 0;
DS1302_RST = 0;
for (i = 0; i < 8; i++)
{
DS1302_DAT = wbyte & 0x01;
wbyte >>= 1;
DS1302_CLK = 1;
DS1302_CLK = 0;
}
DS1302_RST = 1;
DS1302_DAT = 1;
}
uchar DS1302_Read_Byte(uchar addr)
{
uchar i, rbyte = 0;
DS1302_RST = 1;
DS1302_CLK = 0;
DS1302_RST = 0;
DS1302_DAT = 1;
DS1302_CLK = 1;
DS1302_CLK = 0;
DS1302_DAT = 0;
DS1302_CLK = 1;
DS1302_CLK = 0;
for (i = 0; i < 8; i++)
{
rbyte >>= 1;
if (DS1302_DAT)
rbyte |= 0x80;
DS1302_CLK = 1;
DS1302_CLK = 0;
}
DS1302_RST = 1;
DS1302_DAT = 1;
return rbyte;
}
void DS1302_Set_Time(uchar hour, uchar minute, uchar second)
{
DS1302_Write_Byte(0x80, 0); // 开启写保护
DS1302_Write_Byte(hour, 2);
DS1302_Write_Byte(minute, 4);
DS1302_Write_Byte(second, 6);
DS1302_Write_Byte(0x00, 0); // 关闭写保护
}
void DS1302_Get_Time(uchar *hour, uchar *minute, uchar *second)
{
*hour = DS1302_Read_Byte(2);
*minute = DS1302_Read_Byte(4);
*second = DS1302_Read_Byte(6);
}
```
此代码使用Keil C编译器,使用了8051系列单片机。将DS1302的CLK、DAT、RST引脚分别连接到P2.0、P2.1、P2.2引脚。代码实现了DS1302的初始化、写入时间、读取时间等操作。可以根据需要进行修改。