温度控制器程序教学内容

温度控制器程序//PT100自身温度范围#define M_temper_MIN -200 //最低温度#define M_temper_MAX 500 //最高温度//CPU引脚定义#define P_LED P0sbit LED_S1 = P2 ^ 0; //LED1位选sbit LED_S2 = P2 ^ 1; //LED2位选sbit LED_S3 = P2 ^ 2; //LED3位选sbit LED_S4 = P2 ^ 3; //LED4位选sbit KEY_S1 = P1 ^ 0; //上下限温度设置sbit KEY_S2 = P1 ^ 1; //温度加sbit KEY_S3 = P1 ^ 2; //温度减//全局变量寄存器uchar M_LED1, M_LED2, M_LED3, M_LED4; //4位LED显示寄存器uchar LED_DISP_TAB[] = //LED编码表{0X3f, 0X06, 0X5b, 0X4f, 0X66,0X6d, 0X7d, 0X07, 0X7f, 0X6f, //0-90X40, 0X23, 0X1c, 0X58 //字符: - n u c };uchar Set_count; //温度设置按钮计数uchar T0_count; //T0定时中断计数uint T1_count; //T1定时中断计数char M_temper_up; //温度上限char M_temper_down; //温度下限char M_temper_AI; //设置中温度char M_temper_conver; //当前温度bit B_set,B_set_AI; //温度设置标志bit B_set_T0,B_set_T1; //定时器中断标志//函数声明void T1int_init();/* 定时器T1初始化：设置工作方式赋初值开启中断 */void T0int_init();/* 定时器T0初始化：设置工作方式赋初值开启中断 */void Set_temper();/*设置上下限温度：按键次数=1：显示上限温度并处于操作状态按键次数=2：显示下限温度并处于操作状态按键次数=3：保存设置值并退出*/void Inc_temper();/*提高设置的温度 */void Dec_temper();/*降低设置的温度 */void LED_data_BCD(char Disp_dat);/*数码管显示温度 */void PT100_delay(uint count);/* PT100延时程序 */void PT100_reset(void);/*PT100复位初始程序：根据PT100要求对其进行复位初始控制 */bit PT100_readbit(void) ;/*PT100位读子程序：从PT100取出一位数据 */uchar PT100_readbyte(void);/*PT100字节读子程序：读出的一字节数据并返回数据值 */void PT100_writebyte(uchar dat);/*PT100字节写子程序：将输入参数值写入PT100 */void PT100_change(void); //启动PT100温度转换uchar PT100_Gettemper(void);/*读取PT100温度数据：单线方式读取PT100转换的温度数据，并返回处理后的温度值 */void Delay_ms(uint count); //延时子程序：延时 count (ms) void main() {uchar M_temper_curr;SP=0x50; //堆栈起始地址M_temper_up =100; //初始温度上下限M_temper_down=0;Delay_ms(500);T0int_init(); //T0 T1初始化T1int_init();while(1){if (B_set_T0) //T0定时读取温度标志{EA=0; //关总中断B_set_T0=0;if(!B_set) //上下限设置状态时，取消温度读取{PT100_change(); //读取温度M_temper_curr=PT100_Gettemper();M_temper_conver=(M_temper_curr > 126 ? (127-M_temper_curr):M_temper_curr); //转换正负温度LED_data_BCD(M_temper_conver);//转换LED显示}EA=1;}if (B_set_T1) //T1定时LED显示扫描标志 {TR1=0;B_set_T1=0;++T1_count;switch (T1_count) //依次显示4位LED{ case 1:LED_S4 = 1;P_LED = LED_DISP_TAB[M_LED1];LED_S1 = 0;break;case 2:LED_S1 = 1;P_LED = LED_DISP_TAB[M_LED2];LED_S2 = 0;break;case 3:LED_S2 = 1;P_LED = LED_DISP_TAB[M_LED3];LED_S3 = 0;break;case 4:LED_S3 = 1;P_LED = LED_DISP_TAB[M_LED4];LED_S4 = 0;T1_count = 0;break;}TR1=1; //开T1定时器}if ((M_temper_conver>M_temper_down)&&(M_temper_conver<M_temper_up)) { //温度在上下限范围内BUZZ=B_BUZZ_OFF;RED_ALARM=B_RED_OFF;GREEN_ALARM=B_GREEN_OFF;}else{ BUZZ=B_BUZZ_ON;if(M_temper_conver<M_temper_down)RED_ALARM=B_RED_ON; //低于下限温度elseGREEN_ALARM=B_GREEN_ON; //高于上限温度 }if (!KEY_S1) //按键检测{Set_temper(); //设置温度Delay_ms(200);}if (B_set){if (!KEY_S2){Inc_temper(); //温度加Delay_ms(200);}if (!KEY_S3){Dec_temper(); //温度减Delay_ms(200);}}}}void Set_temper() //设置温度{++Set_count;B_set = 1; //设置标志if (Set_count == 1) //设置上限{B_set_AI = 0; LED_data_BCD(M_temper_up); M_temper_AI = M_temper_up; //将原上限温度取出 }else if (Set_count == 2) //设置下限{B_set_AI = 1;M_temper_up = M_temper_AI; //存入新的上限温度LED_data_BCD(M_temper_down);M_temper_AI = M_temper_down; //将原下限温度取出 }else{ //确认退出B_set = 0;Set_count = 0;LED_data_BCD(M_temper_conver);M_temper_down = M_temper_AI; //存入新的下限温度 }}void Inc_temper() //温度加{if (B_set_AI) //判断当前是设置上限(0)还是下限(1) {if ((M_temper_AI <M_temper_MAX) && (M_temper_AI < M_temper_up)) {M_temper_AI++;} //不能加到上线温度和温度范围}else{if (M_temper_AI <M_temper_MAX){M_temper_AI++;}} LED_data_BCD(M_temper_AI);}void Dec_temper() //温度减{if (B_set_AI) //判断当前是设置上限(0)还是下限(1){if (M_temper_AI > M_temper_MIN){M_temper_AI--;}}else{if ((M_temper_AI > M_temper_MIN) && (M_temper_AI > M_temper_down)) {M_temper_AI--;}}LED_data_BCD(M_temper_AI);}void PT100_delay(uint count) //PT100特定延时{uint i;while(count){i=200;while(i>0)i--;count--;}}void PT100_reset(void) //PT100复位初始{ uint i;DQ=0;i=103;while(i>0)i--;DQ=1;i=4;while(i>0)i--;}bit PT100_readbit(void) //PT100位读子程序{uint i;bit dat;DQ=1;_nop_();DQ=0;i++;DQ=1;i++;i++;dat=DQ;i=8;while(i>0)i--;return (dat);}uchar PT100_readbyte(void) //PT100字节读子程序{uchar i,j,dat;dat=0;for(i=1;i<=8;i++){j=PT100_readbit();dat=(j<<7)|(dat>>1); //把读取的数据一位一位放进去 } return(dat);}void PT100_writebyte(uchar dat) //PT100字节写子程序{uint i;uchar j;bit testb;for(j=1;j<=8;j++){testb=dat&0x01;dat=dat>>1;if(testb) //write 1 {DQ=0;i++;i++;DQ=1;i=8;while(i>0)i--; }else{DQ=0; //write 0 i=8;while(i>0)i--; DQ=1;i++;i++;}}}void PT100_change(void) //启动PT100温度转换{PT100_reset();PT100_delay(1);PT100_writebyte(0xcc); PT100_writebyte(0x44); }uchar PT100_Gettemper() //读取PT100温度数据{uint temp;uchar M_temper_L=0,M_temper_H=0;PT100_reset();PT100_delay(1);PT100_writebyte(0xcc);PT100_writebyte(0xbe);M_temper_L=PT100_readbyte();M_temper_H=PT100_readbyte();temp=M_temper_H; //温度数据处理temp<<=8;temp=temp|M_temper_L;if (M_temper_H>0xf0) //正(0)负(1)温度值{temp=((0x1000-(temp&0x0fff))/16)+127; //计算温度}else{temp=temp/16;}M_temper_H=temp;return M_temper_H;}void LED_data_BCD(char Disp_dat) //显示数据LED编码处理{if (Disp_dat <0) //负温度{ M_LED1 = 0X0a; // 调用第10个 M_LED2 = (0-Disp_dat) / 10;M_LED3 = (0-Disp_dat) % 10;}else{M_LED1 = Disp_dat / 100; //正温度M_LED2 = (Disp_dat % 100) / 10;M_LED3 = (Disp_dat % 100) % 10;}if (B_set) //设置状态时显示字符 {if (B_set_AI){M_LED4 = 0x0c;}else{M_LED4 = 0x0b;}}else{M_LED4 = 0x0d;}}void T0int_init() //定时器T0初始化{TMOD = 0X11;TH0 = (65536-XTAL/12*T0_TIMER) / 256;TL0 = (65536-XTAL/12*T0_TIMER) % 256; EA = 1; ET0 = 1;TR0 = 1;}void T1int_init() //定时器T1初始化{TMOD = 0X11;TH1 = (65536-XTAL/12*T1_TIMER) / 256;TL1 = (65536-XTAL/12*T1_TIMER) % 256;EA = 1;ET1 = 1;TR1 = 1;}void Delay_ms(uint count) //延时 count (ms){uint i;while(--count>0){for (i = 0; i < 125; i++);}}void Timer0() interrupt 1 using 1 //T0定时器中断服务程序{if(++T0_count>T0_TIMER_S);{ B_set_T0=1;T0_count=0;}TH0 = (65536-XTAL/12*T0_TIMER) / 256;TL0 = (65536-XTAL/12*T0_TIMER) % 256;TF0=0;}void Timer1() interrupt 3 using 1 //T0定时器中断服务程序{ B_set_T1=1;TH1 = (65536-XTAL/12*T1_TIMER) / 256;TL1 = (65536-XTAL/12*T1_TIMER) % 256;TF1=0;}。