單片機開源項目之基于DS18B20的帶記憶功能溫度報警系統(tǒng)源碼

//74HC138
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;

//蜂鳴器
sbit BUZZ = P1^6;

//數(shù)碼管編碼表
unsigned char code LedTable[] = {
                0xC0,  //"0"
                0xF9,  //"1"
                0xA4,  //"2"
                0xB0,  //"3"
                0x99,  //"4"
                0x92,  //"5"
                0x82,  //"6"
                0xF8,  //"7"
                0x80,  //"8"
                0x90,  //"9"
                0x9C,  // '小0'
                0xC6,  //'C'
                0xBF   //"-"
            };
//數(shù)碼管顯示緩沖區(qū)+LED獨立小燈
unsigned char idata LedBuff[] = {0xC6, 0x9C, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F};

//點陣取模
unsigned char pdata LedCode[3][8] = {
                            {0xFF,0x99,0x00,0x00,0x00,0x81,0xC3,0xE7}, //heart
                            {0xF7,0xD5,0xD5,0xE6,0xF7,0xEB,0xDD,0xBE}, //fire
                            {0xF7,0x77,0xA0,0xC3,0xE5,0xD6,0xB7,0x71}  //water
                           };

 

/**************************local values definition***********************************/
//溫度狀態(tài)
unsigned char idata tempSta = 0;//0表示正常溫度,1表示高溫,2表示低溫
bit flag2s = 0;
unsigned char setTempIndex = 0;//0-正常運行狀態(tài) 1-8報警溫度設(shè)定索引
unsigned char thr0, tlr0;//T0定時器重載值
unsigned int counter = 0;//計數(shù)器
unsigned char idata thr1, tlr1;//00H-70H內(nèi)存不夠,使用70H-FFH內(nèi)存

signed int temp;//存儲溫度值
bit buzzflag = 0;//蜂鳴器啟動標(biāo)志

//定義報警溫度的上限值和下限值范圍(以下溫度值是*10之后的溫度值)溫度值分正負且都是int型
signed int shangxianHigh = 300, shangxianLow = 280;//溫度上限值高溫度值和低溫度值
signed int xiaxianHigh = 200, xiaxianLow = 180;    //溫度下限值的高溫度值和低溫度值
signed char num[8] = {0, 0, 0, 0, 0, 0, 0, 0};//保存報警溫度值十位數(shù)和個位數(shù)
extern bit flagIrd;         //紅外解碼完成標(biāo)志
extern unsigned char IrdCode[4];//裝載紅外解碼值
/**************************local function definition***********************************/
void ConfigTimer0(unsigned int xms);
void TempToLedBuf(signed int temp);
void TempertureWarning(signed int temp);
void ConfigBuzzFr(unsigned int fr);
void ReadE2PROMToNumArrary();

/**************************extern function definition***********************************/
extern void KeyDrive();
extern void KeyScan();
extern void LCD1602RefreshCoursor();
extern void InitLCD1602();
extern void LcdShowStr(unsigned char x, unsigned char y, unsigned char * str);
extern bit StartConvertTemp();
extern bit ReadDS18B20Temperture(signed int * temperture);
extern void WriteEEPROMByte(unsigned char addr, unsigned char dat);
extern unsigned char ReadEEPROMByte(unsigned char addr);
extern void LEDRefreshPause();
extern void ContinueRefreshLED();
extern void ConfigInfrared();
extern void IrdKeyDrive();

/*主函數(shù)main()*/
void main(void)
{
    ADDR3 = 1;
    ENLED = 0;//選擇LED
    InitLCD1602();
    ConfigTimer0(1);//T0定時1ms
    ConfigInfrared();
    //ConfigBuzzFr(1000);//默認設(shè)定蜂鳴器頻率為1000
   
    StartConvertTemp();//啟動一次溫度轉(zhuǎn)換
   
    LcdShowStr(0, 0, "high T: XX-XX 'C");
    LcdShowStr(0, 1, "low  T: XX-XX 'C");//LCD初始化顯示
   
    ReadE2PROMToNumArrary();
    EA = 1; //打開總中斷
   
    while (1)
    {
        KeyDrive(); //檢測按鍵動作

        if (flagIrd)
        {
            flagIrd = 0;
            IrdKeyDrive();//紅外按鍵檢測
        }

        if (flag2s)
        {
            flag2s = 0;
           
            if (ReadDS18B20Temperture(&temp))
            {
                TempToLedBuf(temp); //將溫度值轉(zhuǎn)換成數(shù)碼管數(shù)字并檢測溫度是否超限，超限啟動聲光報警!

                StartConvertTemp();//再次啟動溫度轉(zhuǎn)換
            }
        }
    }
}

/*將eeprom的存儲的報警溫度值的各個位數(shù)字讀取到num[8]數(shù)組中*/
void ReadE2PROMToNumArrary()
{
    unsigned char str[4];
   
    //數(shù)碼管初始化顯示0.00
    LedBuff[2] = LedTable[0];
    LedBuff[3] = LedTable[0];
    LedBuff[4] = LedTable[0];
    LedBuff[3] &= 0x7F;//add point
   
    /*讀取eeprom中的數(shù)據(jù)*/
    num[0] = ReadEEPROMByte(0x00);
    num[1] = ReadEEPROMByte(0x01);
    num[2] = ReadEEPROMByte(0x02);
    num[3] = ReadEEPROMByte(0x03);
    num[4] = ReadEEPROMByte(0x04);
    num[5] = ReadEEPROMByte(0x05);
    num[6] = ReadEEPROMByte(0x06);
    num[7] = ReadEEPROMByte(0x07);
    LedBuff[6] = 0x7F;//讀取成功指示
   
    /*初始化更新設(shè)定的報警溫度值*/
    shangxianLow  = (num[0] * 100 + num[1] * 10);
    shangxianHigh = (num[2] * 100 + num[3] * 10);
    xiaxianLow    = (num[4] * 100 + num[5] * 10);
    xiaxianHigh   = (num[6] * 100 + num[7] * 10);
   
    /*將報警溫度值顯示到LCD1602上*/
    str[0] = num[0] + '0';
    str[1] = num[1] + '0';
    str[2] = '\0';
    LcdShowStr(8, 0, str);
    str[0] = num[2] + '0';
    str[1] = num[3] + '0';
    str[2] = '\0';
    LcdShowStr(11, 0, str);
    str[0] = num[4] + '0';
    str[1] = num[5] + '0';
    str[2] = '\0';
    LcdShowStr(8, 1, str);
    str[0] = num[6] + '0';
    str[1] = num[7] + '0';
    str[3] = '\0';
    LcdShowStr(11, 1, str);  
}

/*將溫度值轉(zhuǎn)換為有效數(shù)字存儲到LedBuff中*/
void TempToLedBuf(signed int temp)
{
    unsigned char buf[6];//緩沖區(qū)
    signed char i = 0;   //i必須是有符號型數(shù)據(jù)

    if (temp < 0) //負溫度值
    {
        buf[5] = LedTable[12];//添加負號
        //保留一位小數(shù)
        temp = (~temp + 1) * 0.0625 * 10;//負值，讀取到的16位二進制數(shù)值取反+1再*分辨率0.0625
        for (i = 0; i < 4; i++) //溫度值最高3位數(shù)值+小數(shù)位
        {
            buf[i] = temp % 10;
            temp /= 10;
        }
        //去掉無效位數(shù)字
        for (i = 3; i > 1; i--)
        {
            if (buf[i] == 0)
            {
                buf[i] = 0xFF;//去掉高位0不顯示
            }
            else
            {
                break;//遇到第一個有效數(shù)字就退出
            }
        }
        //轉(zhuǎn)換為實際的有效數(shù)字
        for (; i >= 0; i--)
        {
            buf[i] = LedTable[buf[i]];
        }
        //將實際數(shù)字拷貝到數(shù)碼管緩沖區(qū)中
        for (i = 0; i < 4; i++)
        {
            LedBuff[i+2] = buf[i];
        }
    }
    else
    {  
        //溫度值大于等于0,保留一位小數(shù)位
        temp = (temp * 0.0625 * 10);//直接用讀取到的16位二進制數(shù)值*分辨率即是實際的溫度值
        TempertureWarning(temp);    //溫度報警檢測必須函數(shù)必須放在前面
       
        for (i = 0; i < 4; i++)
        {
            buf[i] = temp % 10;
            temp /= 10;
        }
        //去掉高位的0
        for (i = 3; i > 1; i--)
        {
            if (buf[i] == 0)
            {
                buf[i] = 0xFF;
            }
            else
            {
                break;//遇到第一個有效數(shù)字就退出
            }
        }
        //轉(zhuǎn)換為實際的有效數(shù)字
        for (; i >= 0; i--)
        {
            buf[i] = LedTable[buf[i]];
        }
        //拷貝到緩沖區(qū)
        for (i = 0; i < 4; i++)
        {
            LedBuff[i+2] = buf[i]; //最低兩位顯示溫度標(biāo)示符
        }
    }
    //在相應(yīng)的位置點上小數(shù)點
    LedBuff[3] &= 0x7F;//0 111 1111
}

/*刷新LCD設(shè)置位置上的數(shù)字顯示*/
void RefreshLCDDisplay()
{
    unsigned char str[3];//字符串緩沖區(qū)

    switch (setTempIndex)
    {
        case 1: str[0] = num[0] + '0'; str[1] = '\0'; LcdShowStr(8, 0, str);  break;
        case 2: str[0] = num[1] + '0'; str[1] = '\0'; LcdShowStr(9, 0, str);  break;//shangxianLow的十位和個位數(shù)字顯示刷新
        case 3: str[0] = num[2] + '0'; str[1] = '\0'; LcdShowStr(11, 0, str); break;
        case 4: str[0] = num[3] + '0'; str[1] = '\0'; LcdShowStr(12, 0, str); break;
        case 5: str[0] = num[4] + '0'; str[1] = '\0'; LcdShowStr(8, 1, str);  break;
        case 6: str[0] = num[5] + '0'; str[1] = '\0'; LcdShowStr(9, 1, str);  break;
        case 7: str[0] = num[6] + '0'; str[1] = '\0'; LcdShowStr(11, 1, str); break;
        case 8: str[0] = num[7] + '0'; str[1] = '\0'; LcdShowStr(12, 1, str); break;
        default: break;
    }
    LCD1602RefreshCoursor();
}

/*響應(yīng)按鍵值來設(shè)置溫度報警值*/
void SetTempByKeyNum(unsigned char keyNum)
{
    switch (setTempIndex)
    {
        case 1: num[0] = keyNum; break;
        case 2: num[1] = keyNum; break;
        case 3: num[2] = keyNum; break;
        case 4: num[3] = keyNum; break;
        case 5: num[4] = keyNum; break;
        case 6: num[5] = keyNum; break;
        case 7: num[6] = keyNum; break;
        case 8: num[7] = keyNum; break;
        default: break;
    }
    RefreshLCDDisplay();
    setTempIndex++;//光標(biāo)右移
    if (setTempIndex > 8)
    setTempIndex = 1;//設(shè)置光標(biāo)回返
    LCD1602RefreshCoursor();  
}

/*光標(biāo)閃爍位置數(shù)字遞增*/
void IncCoursorNum()
{
    switch (setTempIndex)
    {
        case 1:  {if (num[0] < 9) num[0]++; else num[0] = 0; break;} //十位數(shù)字++后重新設(shè)置溫度值
        case 2:  {if (num[1] < 9) num[1]++; else num[1] = 0; break;}//shangxianLow是小數(shù)*10之后的值
        case 3:  {if (num[2] < 9) num[2]++; else num[2] = 0; break;}
        case 4:  {if (num[3] < 9) num[3]++; else num[3] = 0; break;}
        case 5:  {if (num[4] < 9) num[4]++; else num[4] = 0; break;}
        case 6:  {if (num[5] < 9) num[5]++; else num[5] = 0; break;}
        case 7:  {if (num[6] < 9) num[6]++; else num[6] = 0; break;}
        case 8:  {if (num[7] < 9) num[7]++; else num[7] = 0; break;}
        default: break;
    }

   RefreshLCDDisplay();//刷新設(shè)置位置上的數(shù)字顯示
   LCD1602RefreshCoursor();//再次刷新光標(biāo)顯示
}

/*光標(biāo)閃爍位置數(shù)字遞減*/
void DecCoursorNum()
{
    switch (setTempIndex)  //根據(jù)光標(biāo)閃爍的索引來遞減相應(yīng)位置的數(shù)字
    {
        case 1:  {if (num[0] > 0) --num[0]; else num[0] = 9; break;} //十位數(shù)字++后重新設(shè)置溫度值
        case 2:  {if (num[1] > 0) --num[1]; else num[1] = 9; break;}//shangxianLow是小數(shù)*10之后的值
        case 3:  {if (num[2] > 0) --num[2]; else num[2] = 9; break;}
        case 4:  {if (num[3] > 0) --num[3]; else num[3] = 9; break;}
        case 5:  {if (num[4] > 0) --num[4]; else num[4] = 9; break;}
        case 6:  {if (num[5] > 0) --num[5]; else num[5] = 9; break;}
        case 7:  {if (num[6] > 0) --num[6]; else num[6] = 9; break;}
        case 8:  {if (num[7] > 0) --num[7]; else num[7] = 9; break;}
        default: break;
    }

    RefreshLCDDisplay();
    LCD1602RefreshCoursor();//刷新光標(biāo)閃爍
}

/*設(shè)置報警溫度值*/
void SetWarningTemperture()
{
    /*設(shè)置溫度報警值*/
    shangxianLow  = (num[0] * 100 + num[1] * 10);
    shangxianHigh = (num[2] * 100 + num[3] * 10);
    xiaxianLow    = (num[4] * 100 + num[5] * 10);
    xiaxianHigh   = (num[6] * 100 + num[7] * 10);
   
    /*將數(shù)據(jù)保存到eeprom中*/
    WriteEEPROMByte(0x00, num[0]);
    WriteEEPROMByte(0x01, num[1]);
    WriteEEPROMByte(0x02, num[2]);
    WriteEEPROMByte(0x03, num[3]);
    WriteEEPROMByte(0x04, num[4]);
    WriteEEPROMByte(0x05, num[5]);
    WriteEEPROMByte(0x06, num[6]);
    WriteEEPROMByte(0x07, num[7]);
    LedBuff[6] = 0xFE;//寫入成功指示
}

/*溫度報警檢測*/
void TempertureWarning(signed int temp)
{
    if ((temp > xiaxianLow) && (temp < xiaxianHigh)) //溫度在18.0-20.0度進行低溫報警
    {
        buzzflag = 1;//啟動報警器
        ConfigBuzzFr(4000); //蜂鳴器發(fā)聲頻率2000HZ
        LedBuff[6] = 0x00;//低溫亮8個LED小燈
        tempSta = 2;//water
    }
    else if ((temp > shangxianLow) && (temp < shangxianHigh)) //溫度在28.0-30.0度進行高溫報警
    {
        buzzflag = 1;
        ConfigBuzzFr(8000);//蜂鳴器發(fā)聲頻率5000HZ
        LedBuff[6] = 0x00;//高溫亮八個LED小燈
        tempSta = 1;//fire
    }
    else
    {
        buzzflag = 0;//關(guān)閉報警器
        LedBuff[6] = 0xFF;//關(guān)閉報警燈
        tempSta = 0;//heart
    }
}

/*配置T0定時器,由于刷新時間的要求，定時xms時間*/
void ConfigTimer0(unsigned int xms)
{
    unsigned long tmp;
    tmp = 11059200/12;//周期頻率
    tmp = (tmp * xms) / 1000;//定時xms需要的計數(shù)值
    tmp = 65536 - tmp;//定時xms的定時器裝入初值
    thr0 = (unsigned char)(tmp >> 8);
    tlr0 = (unsigned char)tmp;
    TMOD &= 0xF0;//清零T0控制位
    TMOD |= 0x01;//T0方式1,16位定時器可以設(shè)定
    TH0 = thr0;
    TL0 = tlr0;
    TR0 = 1;//開啟T0定時器
    ET0 = 1;//開定時器T0中斷
}

/*數(shù)碼管刷新*/
void RefreshLEDChar()
{
    static unsigned char index = 0;
    P0 = 0xFF;//消隱
    ADDR3 = 1;
    if ((ENLED == 0) && (ADDR3 == 1))
    {
        P1 &= 0xF8;//清零P1口低三位
        P1 |= index;//index控制三八譯碼器選擇地址
        P0 = LedBuff[index++];
        if (index > 6) //刷新LEDS0-LEDS6，6個數(shù)碼管+LED小燈
        {
            index = 0;
        }
    }
}

/*刷新點陣屏*/
void RefreshLed()
{
    static unsigned char index = 0;
    P0 = 0xFF;   
    ADDR3 = 0;
    if ((ENLED == 0) && (ADDR3 == 0))
    {
        P1 &= 0xF8;//清零P1口低三位
        P1 |= index;
        P0 = LedCode[tempSta][index++];//tempSta == 0表示溫度正常
        if (index > 7)
        index = 0;
        //index &= 0x07;//到8歸0
    }
}

/*配置蜂鳴器發(fā)聲頻率fr*/
void ConfigBuzzFr(unsigned int fr)
{
    unsigned long tmp = 0;
    tmp = 11059200/12; //周期頻率
    tmp = tmp / fr;    //設(shè)定fr頻率需要的計數(shù)值
    tmp = 65536 - tmp;//設(shè)定fr頻率需要裝入的計數(shù)初值
    thr1 = (unsigned char)(tmp >> 8);
    tlr1 = (unsigned char)tmp;       //計數(shù)值高低字節(jié)
    TMOD &= 0x0F; //清零T1控制位
    TMOD |= 0x10; //配置T1工作方式1，16位定時器模式
    TH1 = thr1;
    TL1 = tlr1;
    TR1 = 1;//開啟T1
    ET1 = 1;//開啟定時器T1中斷
}

/*定時器T0中斷服務(wù)*/
void Timer0_ISP() interrupt 1
{  
    static bit biv = 0;
    TH0 = thr0;
    TL0 = tlr0;//重新裝入初值
    counter++;
    KeyScan();        //掃描按鍵
    RefreshLEDChar(); //1ms數(shù)碼管顯示刷新    
    if (!biv)         //2ms
    {
        RefreshLed();//點陣刷新 
    }
    biv = ~biv;           //分頻
   
    if (counter >= 2000)
    {
        counter = 0;//2s
        flag2s = 1;
    }
}

/*定時器T1中斷服務(wù)配置蜂鳴器的發(fā)聲頻率*/
void Timer1_ISP() interrupt 3
{
    TH1 = thr1;
    TL1 = tlr1;

    if (buzzflag)
    {
        BUZZ = ~BUZZ;//以frHZ驅(qū)動蜂鳴器發(fā)聲
    }
}

 /**
  ***********************************************************************************************
  * @file      :  lcd1602.c
  * @author    :  xr
  * @date      :  2014年4月27日08:40:23
  * @version   :  V1.2.3
  * @brief     :  LCD1602驅(qū)動
  ***********************************************************************************************
  */
#include <reg52.h>