TEST/TEST_Prj/stm32_SmartLed_proprj/Demo/USER/ds1302.c

#include "ds1302.h"

//#define DS1302_DAT_INPUT()   {GPIOB->CRH&=0XFFFFFFF0;GPIOB->CRH|=8;}  //设置dio引脚输入模式
//#define DS1302_DAT_OUTPUT()   {GPIOB->CRH&=0XFFFFFFF0;GPIOB->CRH|=3;}//设置输出模式  


struct DS1302DATA ds1302Data = {22,4,26,22,02,0,6};

u8 ascii_time[7] = {0};     //保存ascii格式数据

u8 bcd_time[7] = {0};       //保存bcd码数据



void DS1302_DAT_INPUT(void)//SDA配置输入模式
{
     GPIO_InitTypeDef  GPIO_InitStructure;	
	 	 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
		 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
		 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;//GPIO_Mode_IPU; 		 //上拉输入
		 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;		 //IO口速度为50MHz
		 GPIO_Init(GPIOB, &GPIO_InitStructure);					 //根据设定参数初始化
}
void DS1302_DAT_OUTPUT(void)//SDA配置输出模式
{
     GPIO_InitTypeDef  GPIO_InitStructure;	
	 	 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
		 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
		 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//GPIO_Mode_Out_PP; 		 //推挽输出
		 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;		 //IO口速度为50MHz
		 GPIO_Init(GPIOB, &GPIO_InitStructure);					 //根据设定参数初始化	
	   
}


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_GPIOB|RCC_APB2Periph_GPIOA, ENABLE);
    
    //RST
    GPIO_InitStructure.GPIO_Pin =GPIO_Pin_12;      
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//GPIO_Mode_Out_PP;//推挽输出
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    
    //CLK
    GPIO_InitStructure.GPIO_Pin =GPIO_Pin_14;      
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//GPIO_Mode_Out_PP;//推挽输出
    GPIO_Init(GPIOB, &GPIO_InitStructure);
    
    //DIO
    GPIO_InitStructure.GPIO_Pin =GPIO_Pin_15;      
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//GPIO_Mode_Out_PP;//推挽输出
    GPIO_Init(GPIOB, &GPIO_InitStructure);
}

//读取一个字节的时序
u8 Ds1302_ReadByte(void)
{
    u8 i = 0, dat = 0;
    DS1302_DAT_INPUT();
    delay_us(5);
    for(i = 0; i <8; i++)
    {
        dat >>= 1;
        if(DS1302_DATIN == 1)dat |= 0x80;
        DS1302_CLK = 1;
        delay_us(2);
        DS1302_CLK = 0;
        delay_us(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;
    delay_us(2);
    for(i = 0; i < 8; i++)
    {
        DS1302_DATOUT = data&0x01;
        delay_us(2);
        DS1302_CLK = 1;
        delay_us(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
}