C单片机的温闭环控制实验程序.doc

#include #include #include void pid(void)/PID算法子程序void init(void)/初始化子程序void display(void)/延时子程序void clear()/清零子程序int mmul(int x,int y) /16位乘法，溢出赋极值int madd(int x,int y) /16位加法，溢出赋极值int change32_16(int x,int t) /3216char change16_8(int wd) /168#define C8255_A XBYTE0x7F00#define C8255_B XBYTE0x7F01#define C8255_C XBYTE0x7F02#define C8255_CON XBYTE0x7F03#define AD0809 XBYTE0xFEFF/定义AD0809的地址sbit P17=P17;/PWM的驱动char TS=0x64;/采样周期int X=0x80;char SPEC=0x28; /给定：要求达到的温度值char IBAND=0x60; /积分分离值：PID算法中积分分离值int KP=12; /比例系数：PID算法中比例项系数char KI=20; /积分系数char KD=32; /微分系数int CK; /控制量：PID算法产生用于控制的量int TC; /采样周期变量char FPWM; /PWM脉冲中间标识位int CK_1; /控制量变量，用于记录上次控制的值int AAAA; / PWM高电平脉冲时间计算int VAA; /AAAA变量int BBB; /PWM低电平脉冲时间计算int VBB; /BBB变量int TKMARK; /采样标志值int ADMARK;/AD转换结束标志位int ADVALUE; /AD采样后保存int YK; /反馈：测量温度值int EK;/温度误差int EK_1;int AEK;int BEK;unsigned char dis; /BCD码显示unsigned char led=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f;unsigned char b=0x00,0x00,0x00,0x00; /位选/*温度表*/unsignedcharcode a0x100=0x14,0x14,0x14,0x14,0x14,0x14,0x14,0x14,0x14,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1e,0x1f,0x20,0x21,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,0x31,0x32,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,0x40,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f,0x50,0x4f,0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f,0x60,0x61,0x62,0x63,0x64,0x64,0x65,0x65,0x66,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6e,0x6f,0x6f,0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f,0x80,0x81,0x82,0x83,0x84,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8e,0x8f,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9b,0x9c,0x9c,0x9d,0x9d,0x9e,0x9e,0x9f,0x9f,0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf,0xb0,0xb0,0xb1,0xb2,0xb3,0xb4,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xbb,0xbd,0xbe,0xbe,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc8,0xca,0xcc,0xce,0xcf,0xd0,0xd1,0xd2,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdd,0xde,0xe3,0xe6,0xe9,0xec,0xf0,0xf2,0xf6,0xfa,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /*延时子程序*/void delay(unsigned int time) unsigned int i; for(i=0;itime;i+)/*主程序*/void main() init(); while(1); while(1) if(TRMARK=0x01)break; /采样周期到否 TRMARK=0x00; while(1) if(ADMARK=0x01)break; /AD转换是否结束 ADMARK=0x00; YK=aADVALUE; dis=(char)YK; /查温度表pid(); /PID算法 if(CK=0x80) /根据CK产生PWM AAAA=0x00; else AAAA=CK-0x80;BBB=0x7f-AAAA; /*初始化函数*/void init(void) YK=0x00; /变量初始化 EK=0x00; EK_1=0x00; AEK=0x00; BEK=0x00; CK=0x00; CK_1=0x00; BBB=0x00; VBB=0x00; ADVALUE=0x00; TKMARK=0x00; ADMARK=0x00; TC=0x00; /采样周期变量 FPWM=0x01; AAAA=0x7f; VAA=0x7f; C8255_CON=0x81; display(); clear(); TMOD=0x11; /T1 ，T0由外部控制中断控制信号，16位定时器，工作在方式一下 IP=0x02; /设定T0中断优先级最高 IT1=1; /外部中断请求信号方式为脉冲触发方式，外中断1为下降沿有效 EX1=1; /允许INT1中断 TH0=0xd8; TL0=0xef; TH1=0xd8; TL1=0xef; ET0=ET1=1; /允许T0,T1中断 TR0=TR1=1; /启动T0,T1 EA=1; AD0809=1; /启动AD转换void myint3(void) interrupt 3 /定时器1 LED显示 TH1=0xd8; TL1=0xef; ET1=1; display(); clear();void myint1(void) interrupt 2 /外中断1 读AD转换结果 ADVALUE=AD0809; ADMARK=0x01;void myint2(void) interrupt 1 /定时器0 启动AD转换 TH0=0xd8; TL0=0xef; ET0=1; /启动定时器0 AD0809=1; /启动AD if(TCabs(IBAND) I=0; /判积分分离 else I=(EK*TS)/KI; /计算积分项 P=AEK; D=(KD/TS)*BEK)/10000; /计算微分项 /与书上对照，忽略KP K=madd(I,P); K=madd(D,K); K=mmul(K,KP); K=K/10; CK=K+CK_1; CK=change16_8(CK); CK_1=CK; EK_1=EK; CK=CK+X;int mmul(int x,int y) int t,z; long s; s=x*y; z=(int)(s&0x0ffff); t=(int)(s16)&0x0ffff); s=change32_16(z,t); return(s);int change32_16(int z,int t) /t=高字节,z=低字节 int s; if(t=0) if(z&0x8000)=0) s=z; else s=0x7fff; else if(t&0xffff)=0xffff) if(z&0x8000)=0) s=0x8000; else s=z; else if(t&0x8000)=0) s=0x7fff; else s=0x8000; return(s);int mmad(int x,int y) int t; t=x+y; if(x=0&y=0) /同号相乘，符号位变反说明溢出 if(t&0x8000)!=0) t=0x7fff; else if(x=0&y8)&0x0ff; if(t=0x00) if(z&0x80)=0) s=z; else s=0x7f; else if(t&0xff)=0xff) if(z&0x80)=0) s=0x80; else s=z; else if(t&0x80)=0) s=0x7f; else s=0x80; return(s);void display() /数码管显示函数 unsigned char i,j=0xf7; b3=SPEC/10; b2=SPEC%10; b1=dis/10; b0=dis%10; for(i=0;i=1; void clear() C8255_B=0x00;