1、温度报警程序#include extern GetTemp(); /声明引用外部函数extern unsigned int idata Temperature; / 声明引用外部变量void delay(unsigned int i); /普通延时函数void display(unsigned int num); /温度显示void display_delay(unsigned int num ,unsigned int i); /带温度显示的延时函数/else IOsbit LS138A=P22; /管脚定义sbit LS138B=P23;sbit LS138C=P24; sbit baoj
2、in=P15;sbit led=P11;sbit key1=P32; / 报警温度设置 键sbit key2=P20; / 温度加sbit key3=P21; /温度减sbit key4=P25;sbit key5=P26; /复位 启动温度监测sbit jidianq=P14; /继电器控制引脚/此表为 LED 的字模, 共阴数码管 0-9 - unsigned char code Disp_Tab = 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40; unsigned long LedOut5,LedNumVal;unsigne
3、d int Hset=25,Lset=15; /设置温度变量默认值为25度unsigned char i; void system_Ini() TMOD|= 0x11; TH1 = 0xD8; /10 TL1 = 0xF0; IE = 0x8A; TR1 = 1;void system_Int0() /设置启动外部中断INT0 EA=1; EX0=1; IT0=0; main() delay(200); system_Ini(); system_Int0(); while(1) GetTemp(); /获取温度 LedNumVal=Temperature; /把实际温度送到LedNumVal变
4、量中 if(LedNumVal=Hset)/温度报警设备控制 baojin=0; /启动蜂鸣器 jidianq=1; /断开继电器 else baojin=1; jidianq=0; if(LedNumVal 0; i-) for(j = 200; j 0; j-); /显示温度num void display(unsigned int num) unsigned int j; LedOut0=Disp_Tabnum%10000/1000; LedOut1=Disp_Tabnum%1000/100; LedOut2=Disp_Tabnum%100/10; /十位 LedOut3=Disp_Ta
5、bnum%10; /个位 for(j=0; j 0; i-) for(j = 200; j 0; j-); display(num); /外部中断INT0 设置报警温度值void int0() interrupt 0 while(1) while(1) if(Hset=100|Hset=0|HsetLset) Hset=25; if(key2=0) display_delay(Hset,20); if(key2=0) Hset+; if(key3=0) display_delay(Hset,20); if(key3=0) Hset-; display(Hset); if(key4=0) bre
6、ak; while(1) if(Lset=100|LsetHset) Lset=10; if(key2=0) display_delay(Lset,20); if(key2=0) Lset+; if(key3=0) display_delay(Lset,20); if(key3=0) Lset-; display_delay(Lset,20); if(key4=0) break; key1=1; if(key4=0) break; /*此部分为18B20的驱动程序*/#include #include sbit D18B20=P37;#define NOP() _nop_() /* 定义空指令
7、 */#define _Nop() _nop_() /*定义空指令*/void TempDelay (unsigned char idata us);void Init18b20 (void);void WriteByte (unsigned char idata wr); /单字节写入void read_bytes (unsigned char idata j);unsigned char CRC (unsigned char j);void GemTemp (void);void Config18b20 (void);void ReadID (void);void TemperatuerR
8、esult(void);bit flag;unsigned int idata Temperature;unsigned char idata temp_buff9; /存储读取的字节，read scratchpad为9字节，read rom ID为8字节unsigned char idata id_buff8;unsigned char idata *p,TIM;unsigned char idata crc_data;unsigned char code CrcTable 256=0, 94, 188, 226, 97, 63, 221, 131, 194, 156, 126, 32, 1
9、63, 253, 31, 65,157, 195, 33, 127, 252, 162, 64, 30, 95, 1, 227, 189, 62, 96, 130, 220,35, 125, 159, 193, 66, 28, 254, 160, 225, 191, 93, 3, 128, 222, 60, 98,190, 224, 2, 92, 223, 129, 99, 61, 124, 34, 192, 158, 29, 67, 161, 255,70, 24, 250, 164, 39, 121, 155, 197, 132, 218, 56, 102, 229, 187, 89, 7
10、,219, 133, 103, 57, 186, 228, 6, 88, 25, 71, 165, 251, 120, 38, 196, 154,101, 59, 217, 135, 4, 90, 184, 230, 167, 249, 27, 69, 198, 152, 122, 36,248, 166, 68, 26, 153, 199, 37, 123, 58, 100, 134, 216, 91, 5, 231, 185,140, 210, 48, 110, 237, 179, 81, 15, 78, 16, 242, 172, 47, 113, 147, 205,17, 79, 17
11、3, 243, 112, 46, 204, 146, 211, 141, 111, 49, 178, 236, 14, 80,175, 241, 19, 77, 206, 144, 114, 44, 109, 51, 209, 143, 12, 82, 176, 238,50, 108, 142, 208, 83, 13, 239, 177, 240, 174, 76, 18, 145, 207, 45, 115,202, 148, 118, 40, 171, 245, 23, 73, 8, 86, 180, 234, 105, 55, 213, 139,87, 9, 235, 181, 54
12、, 104, 138, 212, 149, 203, 41, 119, 244, 170, 72, 22,233, 183, 85, 11, 136, 214, 52, 106, 43, 117, 151, 201, 74, 20, 246, 168,116, 42, 200, 150, 21, 75, 169, 247, 182, 232, 10, 84, 215, 137, 107, 53; /*Function:延时处理*parameter:*Return:*Modify:*/void TempDelay (unsigned char idata us) while(us-);/*Fun
13、ction:18B20初始化*parameter:*Return:*Modify:*/void Init18b20 (void) D18B20=1; _nop_(); D18B20=0; TempDelay(80); /delay 530 uS/80 _nop_(); D18B20=1; TempDelay(14); /delay 100 uS/14 _nop_(); _nop_(); _nop_(); if(D18B20=0) flag = 1; /detect 1820 success! else flag = 0; /detect 1820 fail! TempDelay(20); /2
14、0 _nop_(); _nop_(); D18B20 = 1;/*Function:向18B20写入一个字节*parameter:*Return:*Modify:*/void WriteByte (unsigned char idata wr) /单字节写入 unsigned char idata i; for (i=0;i= 1; /*Function:读18B20的一个字节*parameter:*Return:*Modify:*/unsigned char ReadByte (void) /读取单字节 unsigned char idata i,u=0; for(i=0;i= 1; D18
15、B20 = 1; if(D18B20=1) u |= 0x80; TempDelay (2); _nop_(); return(u);/*Function:读18B20*parameter:*Return:*Modify:*/void read_bytes (unsigned char idata j) unsigned char idata i; for(i=0;ij;i+) *p = ReadByte(); p+; /*Function:CRC校验*parameter:*Return:*Modify:*/unsigned char CRC (unsigned char j) unsigne
16、d char idata i,crc_data=0; for(i=0;ij;i+) /查表校验 crc_data = CrcTablecrc_datatemp_buffi; return (crc_data);/*Function:读取温度*parameter:*Return:*Modify:*/void GemTemp (void) read_bytes (9); if (CRC(9)=0) /校验正确 Temperature = temp_buff1*0x100 + temp_buff0;/ Temperature *= 0.625; Temperature /= 16; TempDela
17、y(1); /*Function:内部配置*parameter:*Return:*Modify:*/void Config18b20 (void) /重新配置报警限定值和分辨率 Init18b20(); WriteByte(0xcc); /skip rom WriteByte(0x4e); /write scratchpad WriteByte(0x19); /上限 WriteByte(0x1a); /下限 WriteByte(0x7f); /set 11 bit (0.125) Init18b20(); WriteByte(0xcc); /skip rom WriteByte(0x48);
18、/保存设定值 Init18b20(); WriteByte(0xcc); /skip rom WriteByte(0xb8); /回调设定值/*Function:读18B20ID*parameter:*Return:*Modify:*/void ReadID (void)/读取器件 id Init18b20(); WriteByte(0x33); /read rom read_bytes(8);/*Function:18B20ID全处理*parameter:*Return:*Modify:*/void TemperatuerResult(void) p = id_buff; ReadID();
19、 Config18b20(); Init18b20 (); WriteByte(0xcc); /skip rom WriteByte(0x44); /Temperature convert Init18b20 (); WriteByte(0xcc); /skip rom WriteByte(0xbe); /read Temperature p = temp_buff; GemTemp();void GetTemp() if(TIM=100) /每隔 1000ms 读取温度 TIM=0; TemperatuerResult(); /* t1 (10ms)中断 中断*/void T1zd(void) interrupt 3 TH1 = 0xD8; /10 TL1 = 0xF0; TIM+;
