在stm32f4上移植ds1302的程序（亲测有效）

wzh383 · 发表于 2016-10-29 20:28:50

网上写的直接抄发现没用，然后自己动手，修修改改就出来了，欢迎大神指点硬件图
QQ图片20161029195258.png

io口用的是PC0,PC1,PC2，接了100k下拉电阻，晶振两端接了30pf的电容
ds1302.h
[mw_shl_code=c,true]#ifndef _DS1302_H
#define _DS1302_H

#include "sys.h"
#define DS1302_SDA_IN()             {GPIOC->MODER &= 0x0000000f;}
#define DS1302_SDA_OUT()    {GPIOC->MODER &= 0x0000000f;GPIOC->MODER |= 1<<4;}

#define RST                      PCout(0)
#define SCLK                      PCout(1)
#define DATA_OUT                      PCout(2)
#define DATA_IN                   PCin(2)

#define SECOND               0x80
#define MINUTE            0x82
#define HOUR                0x84
#define DATE             0x86
#define MONTH                0x88
#define WEEK                0x8A
#define YEAR          0x8C
#define ENABLE          0x8E

typedef struct
{
u8 second;
u8 minute;
u8 hour;
u8 date;
u8 month;
u8 week;
u8 year;
}TIME;

void DS1302_Init(void);

void Write1302(unsigned char dat);
void WriteSet1302(unsigned char Cmd,unsigned char dat);
unsigned char Read1302(void);
unsigned char ReadSet1302(unsigned char Cmd);
void Time_Init(void);
void Get_Time(TIME* time);

#endif
[/mw_shl_code]

ds1302.c
[mw_shl_code=c,true]#include "ds1302.h"
#include "delay.h"

void DS1302_Init()
{
GPIO_InitTypeDef  GPIO_InitStructure;

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);

  //GPIOC0,C1,C23õê¼»ˉéèÖÃ
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

}

void Write1302(unsigned char dat)
{
unsigned char i;
SCLK=0;
delay_us(2);
for(i=0;i<8;i++)
{
DATA_OUT=dat&0x01;
delay_us(2);
SCLK=1;
delay_us(2);
SCLK=0;
dat>>=1;
}

}

void WriteSet1302(unsigned char Cmd,unsigned char dat)
{
RST=0;
SCLK=0;
RST=1;
delay_us(2);
Write1302(Cmd);
Write1302(dat);
SCLK=1;
RST=0;
}

unsigned char Read1302(void)
{
unsigned char i,dat;
delay_us(2);
for(i=0;i<8;i++)
{
dat>>=1;
if(DATA_IN==1)
dat|=0x80;
SCLK=1;
delay_us(2);
SCLK=0;
delay_us(2);
}
return dat;
}

unsigned char ReadSet1302(unsigned char Cmd)
{
unsigned char dat;
RST=0;
SCLK=0;
RST=1;
Write1302(Cmd);
dat=Read1302();
SCLK=1;
RST=0;
return dat;
}

void Time_Init()
{
WriteSet1302(SECOND,0);
WriteSet1302(MINUTE,0);
WriteSet1302(HOUR,6);
WriteSet1302(DATE,11);
WriteSet1302(MONTH,11);
WriteSet1302(WEEK,1);
WriteSet1302(YEAR,0x16);

}

void Get_Time(TIME* time)
{
u8 temp;
time->second=ReadSet1302(SECOND|1);
temp=time->second;
time->second=(temp&=0x0f)+(time->second>>4)*10;

time->minute=ReadSet1302(MINUTE|1);
temp=time->minute;
time->minute=(temp&=0x0f)+(time->minute>>4)*10;

time->hour=ReadSet1302(HOUR|1);
temp=time->hour;
time->hour=(temp&=0x0f)+(time->hour>>4)*10;

time->date=ReadSet1302(DATE|1);
temp=time->date;
time->date=(temp&=0x0f)+(time->date>>4)*10;

time->month=ReadSet1302(MONTH|1);
temp=time->month;
time->month=(temp&=0x0f)+(time->month>>4)*10;

time->week=ReadSet1302(WEEK|1);
temp=time->week;
time->week=(temp&=0x0f)+(time->week>>4)*10;

time->year=ReadSet1302(YEAR|1);
temp=time->year;
time->year=(temp&=0x0f)+(time->year>>4)*10;
}
[/mw_shl_code]

main.c

[mw_shl_code=c,true]#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "ds1302.h"
#include "lcd.h"

int main(void)
{

TIME time;
delay_init(168);
uart_init(115200);
DS1302_Init();
Time_Init();


    while(1)
{

Get_Time(&time);
printf("%d",time.second);

delay_ms(1000);

}
}
[/mw_shl_code]

写得不好，欢迎指点，就我知道的缺点
①没有充电函数
②没有开机自检
③没有写保护
不过基本的读写时间是可以进行了

第一次发帖，向原子哥问好，原子哥爆个照呗~