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本帖最后由 xjx51 于 2021-8-11 16:06 編輯
今天來做DS23231的鬧鐘功能
前幾天已經(jīng)做好了DS3231的鬧鐘啟動函數(shù)，現(xiàn)在也測試成功，
來曬一下開啟和關(guān)閉的程序：- #include <reg51.h>
- #include <intrins.h>
- /*DS3231使用功能定義*/
- typedef unsigned char uchar;
- typedef unsigned int uint ;
- sbit SDA=P1^3; //模擬I2C數(shù)據(jù)傳送位SDA
- sbit SCL=P1^1; //模擬I2C時鐘控制位SCL
- sbit SQW=P3^7;
- bit ack; //應(yīng)答標(biāo)志位
- #define DS3231_WriteAddress 0xD0 //器件寫地址
- #define DS3231_ReadAddress 0xD1 //器件讀地址
- #define DS3231_SECOND 0x00 //秒
- #define DS3231_MINUTE 0x01 //分
- #define DS3231_HOUR 0x02 //時
- #define DS3231_WEEK 0x03 //星期
- #define DS3231_DAY 0x04 //日
- #define DS3231_MONTH 0x05 //月
- #define DS3231_YEAR 0x06 //年
- //鬧鈴1
- #define DS3231_SALARM1ECOND 0x07 //秒
- #define DS3231_ALARM1MINUTE 0x08 //分
- #define DS3231_ALARM1HOUR 0x09 //時
- #define DS3231_ALARM1WEEK 0x0A //星期/日
- //鬧鈴2
- #define DS3231_ALARM2MINUTE 0x0b //分
- #define DS3231_ALARM2HOUR 0x0c //時
- #define DS3231_ALARM2WEEK 0x0d //星期/日
- #define DS3231_CONTROL 0x0e //控制寄存器
- #define DS3231_STATUS 0x0f //狀態(tài)寄存器
- #define BSY 2 //忙
- #define OSF 7 //振蕩器停止標(biāo)志
- #define DS3231_XTAL 0x10 //晶體老化寄存器
- #define DS3231_TEMPERATUREH 0x11 //溫度寄存器高字節(jié)(8位)
- #define DS3231_TEMPERATUREL 0x12 //溫度寄存器低字節(jié)(高2位)
- uchar DS3231Time[9]={0x40,0x59,0x05,0x21,0x05,0x08,0x06,0x00,0x00}; //秒分時年月日周溫度高字節(jié)溫度低字節(jié)
- /*全局函數(shù)定義*/
- extern void ModifyTime(uchar yea,uchar mon,uchar da,uchar hou,uchar min,uchar sec,uchar wee);
- extern void get_show_Temperature(void);
- extern void READ_Time();
- extern void DS3231_Init();
- extern uchar DS3231_Time[9];
- void delayus(uint us)
- {
- while(us--);
- }
- uchar BCD2HEX(uchar val) //BCD轉(zhuǎn)換為Byte
- {
- uchar temp;
- temp=val&0x0f;
- val>>=4;
- val&=0x0f;
- val*=10;
- temp+=val;
-
- return temp;
- }
- uchar HEX2BCD(uchar val) //B碼轉(zhuǎn)換為BCD碼
- {
- uchar i,j,k;
- i=val/10;
- j=val;
- k=j+(i<<4);
- return k;
- }
- void Start_I2C()
- {
- SDA=1; //發(fā)送起始條件的數(shù)據(jù)信號
- delayus(1);
- SCL=1;
- delayus(5); //起始條件建立時間大于4.7us,延時
-
- SDA=0; //發(fā)送起始信號
- delayus(5); // 起始條件鎖定時間大于4μs
-
- SCL=0; //鉗住I2C總線，準(zhǔn)備發(fā)送或接收數(shù)據(jù)
- delayus(2);
- }
- void Stop_I2C()
- {
- SDA=0; //發(fā)送結(jié)束條件的數(shù)據(jù)信號
- delayus(1); //發(fā)送結(jié)束條件的時鐘信號
- SCL=1; //結(jié)束條件建立時間大于4us
- delayus(5);
-
- SDA=1; //發(fā)送I2C總線結(jié)束信號
- delayus(4);
- }
- void SendByte(uchar c)
- {
- uchar BitCnt;
-
- for(BitCnt=0;BitCnt<8;BitCnt++) //要傳送的數(shù)據(jù)長度為8位
- {
- if((c<<BitCnt)&0x80)
- SDA=1; //判斷發(fā)送位
- else
- SDA=0;
- delayus(1);
- SCL=1; //置時鐘線為高，通知被控器開始接收數(shù)據(jù)位
- delayus(5); //保證時鐘高電平周期大于4μs
- SCL=0;
- }
-
- delayus(2);
- SDA=1; //8位發(fā)送完后釋放數(shù)據(jù)線，準(zhǔn)備接收應(yīng)答位
- delayus(2);
- SCL=1;
- delayus(3);
- if(SDA==1)
- ack=0;
- else
- ack=1; //判斷是否接收到應(yīng)答信號
- SCL=0;
- delayus(2);
- }
- uchar RcvByte()
- {
- uchar retc;
- uchar BitCnt;
-
- retc=0;
- SDA=1; //置數(shù)據(jù)線為輸入方式
- for(BitCnt=0;BitCnt<8;BitCnt++)
- {
- delayus(1);
- SCL=0; //置時鐘線為低，準(zhǔn)備接收數(shù)據(jù)位
-
- delayus(5); //時鐘低電平周期大于4.7μs
-
- SCL=1; //置時鐘線為高使數(shù)據(jù)線上數(shù)據(jù)有效
- delayus(3);
- retc=retc<<1;
- if(SDA==1)
- retc=retc+1; //讀數(shù)據(jù)位,接收的數(shù)據(jù)位放入retc中
- delayus(2);
- }
- SCL=0;
- delayus(2);
- return(retc);
- }
-
- void Ack_I2C(bit a)
- {
-
- if(a==0)
- SDA=0; //在此發(fā)出應(yīng)答或非應(yīng)答信號
- else
- SDA=1;
- delayus(3);
- SCL=1;
-
- delayus(5); //時鐘低電平周期大于4μs
-
- SCL=0; //清時鐘線，鉗住I2C總線以便繼續(xù)接收
- delayus(2);
- }
-
- uchar write_byte(uchar addr, uchar write_data)
- {
- Start_I2C();
- SendByte(DS3231_WriteAddress);
- if (ack == 0)
- return 0;
-
- SendByte(addr);
- if (ack == 0)
- return 0;
-
- SendByte(write_data);
- if (ack == 0)
- return 0;
-
- Stop_I2C();
- delayus(10);
- return 1;
- }
-
- uchar read_current()
- {
- uchar read_data;
- Start_I2C();
- SendByte(DS3231_ReadAddress);
- if(ack==0)
- return(0);
-
- read_data = RcvByte();
- Ack_I2C(1);
- Stop_I2C();
- return read_data;
- }
-
- uchar read_random(uchar random_addr)
- {
- Start_I2C();
- SendByte(DS3231_WriteAddress);
- if(ack==0)
- return(0);
-
- SendByte(random_addr);
- if(ack==0)
- return(0);
-
- return(read_current());
- }
-
- void ModifyTime(uchar yea,uchar mon,uchar da,uchar hou,uchar min,uchar sec,uchar wee)
- {
- uchar temp=0;
-
- //temp=HEX2BCD(yea);
- write_byte(DS3231_YEAR,yea); //修改年
-
- //temp=HEX2BCD(mon);
- write_byte(DS3231_MONTH,mon); //修改月
-
- //temp=HEX2BCD(da);
- write_byte(DS3231_DAY,da); //修改日
-
- //temp=HEX2BCD(hou);
- write_byte(DS3231_HOUR,hou); //修改時
-
- //temp=HEX2BCD(min);
- write_byte(DS3231_MINUTE,min); //修改分
-
- //temp=HEX2BCD(sec);
- write_byte(DS3231_SECOND,sec); //修改秒
- write_byte(DS3231_WEEK,wee); //修改周
- }
- void get_show_Temperature(void)
- {
- uchar Ttemp1,Ttemp2;
- write_byte(0x0e,0x20);
- Ttemp1=read_random(DS3231_TEMPERATUREH); //溫度 高字節(jié)
- DS3231Time[7]=Ttemp1;
- Ttemp2=read_random(DS3231_TEMPERATUREL); //溫度低字節(jié)
- Ttemp2=(Ttemp2>>6)*25;
- DS3231Time[8]=Ttemp2;
- }
- void READ_Time()
- {
-
- DS3231Time[0]=read_random(DS3231_SECOND);
- DS3231Time[1]=read_random(DS3231_MINUTE);
- DS3231Time[2]=read_random(DS3231_HOUR);
- DS3231Time[3]=read_random(DS3231_YEAR);
- DS3231Time[4]=read_random(DS3231_MONTH);
- DS3231Time[5]=read_random(DS3231_DAY);
- DS3231Time[6]=read_random(DS3231_WEEK);
- get_show_Temperature();
- }
- void DS3231_opennz1(uchar second,minute,hour,day)
- {
- write_byte(0x0e,0x1d);
- write_byte(DS3231_SALARM1ECOND,second);//秒
- write_byte(DS3231_ALARM1MINUTE,minute);//分
- write_byte(DS3231_ALARM1HOUR,hour);//時
- write_byte(DS3231_ALARM1WEEK,day);//星期/日
- }
- void DS3231_opennz2(minute,hour,day)
- {
- write_byte(0x0e,0x1e);
- write_byte(DS3231_ALARM2MINUTE,minute);//分
- write_byte(DS3231_ALARM2HOUR,hour);//時
- write_byte(DS3231_ALARM2WEEK,day);//星期/日
- }
- void DS3231_Init()
- {
- ModifyTime(DS3231Time[3],DS3231Time[4],DS3231Time[5],DS3231Time[2],DS3231Time[1],DS3231Time[0],DS3231Time[6]);
- }
下面是鬧鐘的關(guān)閉程序：
unsigned char i;
write_byte(0x0f,i|=0x00);
這是停止鬧鐘2和鬧鐘1。
鬧鐘判斷程序：
void nz_if()
{
unsigned char i;
i=read_random(0x0f);//讀取狀態(tài)寄存器
i=i&0x02;//鬧鐘2寫i=i&0x02;鬧鐘1寫i=i&0x01;
if(i == 0x02)//鬧鐘2寫i==0x02;鬧鐘1寫i==0x01;
{
//鬧鐘提醒程序，你們想怎么搞就怎么搞
}
｝
希望能幫到你們！
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