1、. PID調節器主控局部包括以下幾個局部：單片機局部、A/D轉換局部、D/A轉換局部、穩壓局部、數字輸入輸出局部以及串口通信局部。D1：部設定點信號燈S1：部設定點和外部設定點轉換開關D2：手動信號燈S2：手動自動轉換開關D3：實際值*顯示信號燈D4：設定值W顯示信號燈S3：參數修改以及實際值和設定值顯示轉換開關D5：超過限定值信號燈D6：低于限定值信號燈S4：設定值增加按鈕S5：設定值減少按鈕S6：修改手動變量按鈕S7：修改手動變量按鈕附錄1 主程序MAIN.C#includeadconver.h#includedelay.h#includedis7281.h#includeSTC12C54

2、10AD.H#includemain.H#includesubkey0.h#includesubkey1.h#includesubkey2.h#includesubkey3.h#includesubkey4.h#includesubkey5.h#includesubkey6.hbit insertsetframe=1;/部設定標志位bit handframe=1;/手動設定標志位bit improvedisframe=0;/實際值標志位bit shineframe=0;/判斷是不是第一次開機停頓4LED的閃爍bit canshuframe=0*00;/參數標志位unsigned char ci

3、rcleframe=0*00;/參數循環變量unsigned char channelframe=0*00;/通道標志位unsigned char ledframe=0*fc;/LED燈管狀態unsigned char times=0*00;/記數位unsigned char readkey;unsigned int setvalue=0*00;/設定值unsigned char outputvalue=0*00;/輸出值unsigned int limup=0*270f;/實際值上限unsigned int limdown=0*00;/實際值下限unsigned int a1=0*270f;

4、/上限報警值unsigned int a2=0*00;/下限報警值unsigned int cp=0*00;/P參數unsigned int ci=0*00;/I參數unsigned int cd=0*00;/D參數unsigned char led6;/LED值公共main() unsigned int tmr; unsigned char keynumber; for (tmr=0;tmra1) ledframe&=0*ef;/翻開上限報警燈 write7281(0*06,ledframe); if(addataa2) ledframe&=0*df;/翻開上限報警燈 write7281(0

5、*06,ledframe); hdconver(addata); dis4led();附錄8 D/A轉換模塊的程序DACONVERC#includedelay.h#includeSTC12C5410AD.H#includemain.H#includedaconver.hsbit TLV5618_SCLK=P17;sbit TLV5618_DIN=P15;sbit TLV5618_CS=P14; void mDelay(unsigned int a)unsigned int f; for(f=0;fa;f+); void TLV5618 (unsigned int da) unsigned in

6、t i;unsigned int dat;dat= da|0*c000;TLV5618_CS=0;TLV5618_SCLK=0; for(i=0;i16;i+) TLV5618_DIN=(bit)(dat&0*8000); dat=dat1; TLV5618_SCLK=1; mDelay(50); TLV5618_SCLK=0; mDelay(50); TLV5618_CS=1; void daconver(void) float i=100; unsigned int da; i=outputvalue/100*4096; da=(unsigned int)i; TLV5618 (da);附

7、錄9顯示及鍵盤模塊的程序DIS7281C#includedelay.H#includeSTC12C5410AD.H#includedis7281.H#includemain.hvoid write7281(unsigned char regadd,unsigned char writedata) sendbyte(regadd); sendbyte(writedata); void sendbyte(unsigned char sendbyte) unsigned char bitcounter; clk=0; clk=1; do clk=0; clk=1; while(dat); clk=0

8、; clk=1; while(!dat); for(bitcounter=0;bitcounter8;bitcounter+) if (sendbyte&0*80)=0) dat=0; else dat=1; sendbyte=sendbyte*2; clk=0; clk=1; delay(1); dat=1; delay(2);unsigned char receivebyte(void) unsigned char bit_counter; unsigned char in_byte; clk=0; clk=1; /只發送一個單元的脈沖 while(dat);/等待BC7281響應DAT底

9、電平 clk=0; clk=1; /受到響應，再發一脈沖等待承受數據 for (bit_counter=0;bit_counter8;bit_counter+ ) /承受8個BIT delay(1); in_byte=in_byte*2 ;/in_byte左移一位 if(dat) /如果DAT為1 in_byte=in_byte|0*01; /bit0=1 clk=0; clk=1; delay(2); clk=0; clk=1; return(in_byte);unsigned char read7281(unsigned char reg_add) sendbyte (0*80+reg_a

10、dd); /發送讀指令BIT 7=1 return (receivebyte(); /承受數據字節并返回 void dis4led() unsigned char i; unsigned char id=0*00; for(i=0;i4;i+) write7281(0*14,id+ledi); id+=0*10; void dis2led() unsigned char i; unsigned char id=0*40; for(i=4;ipv=process_point; pid-sp=set_point; void pid_tune(struct _pid *pid,float p_gai

11、n,float i_gain,float d_gain,int dead_band) pid-pgain=p_gain; pid-igain=i_gain; pid-dgain=d_gain; pid-deadband=dead_band; pid-integral=integral_val; pid-last_error=0;void pid_setinteg(struct _pid *pid,float new_integ) pid-integral=new_integ; pid-last_error=0;void pid_bumpless(struct _pid *pid) pid-la

12、st_error=(pid-sp)-(pid-pv);float pid_calc(struct _pid *pid) int err; float pterm,dterm,result,ferror; err=(pid-sp)-(pid-pv); if(abs(err)pid-deadband) ferror=(float)err; pterm=pid-pgain*ferror; if(pterm100|ptermintegral=0.0; else pid-integral+=pid-igain*ferror; if(pid-integral100.0) pid-integral=100.

13、0; else if(pid-integralintegral=0.0; dterm=(float)(err-pid-last_error)*pid-dgain; result=pterm+pid-integral+dterm; else result=pid-integral; pid-last_error=err; return(result);void pidcf(void) int count=0; float val=100; float p_gain=cp/val; float i_gain=ci/val; float d_gain=cd/val;/ unsigned int dadata; pid=&warm; dead_band=2; integral_val=(float)(0.01); while(count=20) process_point=(unsigned int)addata/val; set_point=(unsigned int)setvalue/val; pid_init