在网上买的一个模块,准备做外部的一个时钟,接入自己其他的项目中,以它的时间为基准,执行每半小时更新时间到其他产品中去
模块采用软件IIC方式读写,需给此模块VCC供5V电压
读写效果如下:
源代码:
DS1307.C
#include "DS1307.h"
//写一字节到对应地址去
unsigned char Write1307(unsigned char add, unsigned char dat)
{
unsigned char temp;
temp = ((dat / 10) << 4) | (dat % 10);//转BCD码再写入1307
IIC_Start();
IIC_Send_Byte(0xd0);
IIC_Wait_Ack();
IIC_Send_Byte(add);
IIC_Wait_Ack();
IIC_Send_Byte(temp);
IIC_Wait_Ack();
IIC_Stop();
return (0);
}
//读一字节
unsigned char Read1307(unsigned char add)
{
unsigned char dat;
IIC_Start();
IIC_Send_Byte(0xD0);
IIC_Wait_Ack();
IIC_Send_Byte(add);
IIC_Wait_Ack();
IIC_Stop();
IIC_Start();
IIC_Send_Byte(0xD1);
IIC_Wait_Ack();
dat = IIC_Read_Byte(0x00); //地址0x00
IIC_NAck();
IIC_Stop();
return dat;
}
//BCD转BIN函数
uint8_t BCD2BIN(char bcd)
{
return (0xff & (bcd>>4))*10 +(0xf & bcd);
}
//读1307时间,*data:读缓存 ,data_len:缓存长度 ,data_type:0:hex模式 1:dec模式
void Read_1307_time(uint8_t *data,uint8_t data_len,uint8_t data_type)
{
if((data_len!=7))
{
DEBUG_ASP("error -1 +%d\r\n",data_len);
return ;
}
else if(data_type==0)//十六进制格式
{
data[0] = (Read1307(0x06) & 0xff);//年低2位
data[1] = (Read1307(0x05) & 0x1F);//月
data[2] = (Read1307(0x04) & 0x3F);//日
data[3] = (Read1307(0x02) & 0x3F);//时
data[4] = (Read1307(0x01) & 0x7F);//分
data[5] = (Read1307(0x00) & 0x7F);//秒
data[6] = (Read1307(0x03) & 0x07);//星期
// DEBUG_ASP("TIME(Hex): 20%02x-%02x-%02x %02x:%02x:%02x ,%02x\r\n", data[0], data[1], data[2], data[3], data[4], data[5], data[6]);
}
else//十进制模式
{
data[0] = BCD2BIN(Read1307(0x06) & 0xff);//年低2位
data[1] = BCD2BIN(Read1307(0x05) & 0x1F);//月
data[2] = BCD2BIN(Read1307(0x04) & 0x3F);//日
data[3] = BCD2BIN(Read1307(0x02) & 0x3F);//时
data[4] = BCD2BIN(Read1307(0x01) & 0x7F);//分
data[5] = BCD2BIN(Read1307(0x00) & 0x7F);//秒
data[6] = BCD2BIN(Read1307(0x03) & 0x07);//星期
// DEBUG_ASP("TIME(Dec): 20%02d-%02d-%02d %02d:%02d:%02d T:%02d\r\n", data[0], data[1], data[2], data[3], data[4], data[5], data[6]);
}
}
//写1307时间,*data:写缓存 ,data_len:缓存长度 ,data_type:0:hex模式 1:dec模式
void Write_1307_time(uint8_t *data,uint8_t data_len,uint8_t data_type)
{
if((data_len!=7))
{
DEBUG_ASP("error -1 +%d\r\n",data_len);
return ;
}
else if(data_type==0)//十六进制格式
{
Write1307(0x06, BCD2BIN(data[0]));//年
Write1307(0x05, BCD2BIN(data[1]));//月
Write1307(0x04, BCD2BIN(data[2]));//日
Write1307(0x02, BCD2BIN(data[3]));//时
Write1307(0x01, BCD2BIN(data[4]));//分
Write1307(0x00, BCD2BIN(data[5]));//秒
Write1307(0x03, BCD2BIN(data[6]));//星期
}
else//十进制模式
{
Write1307(0x06, data[0]);//年
Write1307(0x05, data[1]);//月
Write1307(0x04, data[2]);//日
Write1307(0x02, data[3]);//时
Write1307(0x01, data[4]);//分
Write1307(0x00, data[5]);//秒
Write1307(0x03, data[6]);//星期
}
}
void DS1307_init(void)
{
IIC_Init();
delay_ms(200);
// uint8_t tempdata[7]={0x23,0x12,0x07,0x16,0x35,0x20,0x04};
// Write_1307_time(tempdata,sizeof(tempdata)/sizeof(*(tempdata)),0);
}
void DS1207_TEXT(void)
{
uint8_t tempdata[7];
Read_1307_time(tempdata,sizeof(tempdata)/sizeof(*(tempdata)),0);
DEBUG_ASP("TIME0: 20%02x-%02x-%02x %02x:%02x:%02x ,%02x\r\n", tempdata[0], tempdata[1], tempdata[2], tempdata[3], tempdata[4], tempdata[5], tempdata[6]);
}
DS1307.h
#ifndef __DS1307_H__
#define __DS1307_H__
#include "myiic.h"
void Read_1307_time(uint8_t *data,uint8_t data_len,uint8_t data_type);
void Write_1307_time(uint8_t *data,uint8_t data_len,uint8_t data_type);
extern void DS1307_init(void);
extern void DS1207_TEXT(void);
#endif