/*************簡易數(shù)控電壓表**************************程序功能：輸出可調(diào)0~5伏電壓，步進(jìn)值為0.1V涉及芯片：1602液晶、TLC5615、TLC549、AT89S52單片機******************************************************/#includereg52.h>#define uint unsigned int#define uchar unsigned charuchar code num[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39};/*uchar code dianya[]={21,41,65,84,104,125,145,166,186,206,227,247,267,288,308,330,350,370,392,412,432,452,472,494,514,534,556,576,596,616,636,658,678,698,720,740,760,780,802,822,842,862,884,904,924,944,964}; */sbit key1=P1^0;sbit key2=P1^1;sbit key3=P1^2;sbit key4=P1^3;sbit din=P3^0;sbit scl=P3^1;sbit cs1=P3^2;sbit clock=P3^3;//時鐘線sbit dout=P3^4;//數(shù)據(jù)輸出端sbit cs=P3^5;//片選（低電平有效）sbit rs=P2^0;//數(shù)據(jù)/命令選擇端（H/L）sbit rw=P2^1;//讀/寫選擇端（H/L）sbit en=P2^2; //使能選擇端uchar bdata date; //位尋址sbit date7=date^7;sbit date6=date^6;sbit date5=date^5;sbit date4=date^4;sbit date3=date^3;sbit date2=date^2;sbit date1=date^1;sbit date0=date^0;/****************函數(shù)聲明**********************/void delay(uint time);void write_com(uchar mingling);void write_date(uchar shuju);void chushihua();void delayus(uint t){while(t--);}void write_sip5615(uchar k){date=k;din=date7;scl=0;scl=1;din=date6;scl=0;scl=1;din=date5;scl=0;scl=1;din=date4;scl=0;scl=1;din=date3;scl=0;scl=1;din=date2;scl=0;scl=1;din=date1;scl=0;scl=1;din=date0;scl=0;scl=1;}void write_5615(uint k){k=2;cs1=0;write_sip5615(k>>8);write_sip5615(k);cs1=1;}uchar read_549()//數(shù)據(jù)得采集{uint i;uchar k=0x00;//定義一個變量k，將在dout上采集的到的數(shù)據(jù)裝進(jìn)Kdout=1;//該地方置不置高電平都可以，應(yīng)為單片機的I/O口默認(rèn)值為高點平for(i=0;i8;i++){if(dout){k|=(0x80)>>i;}clock=1;//高電平期間采集dout線上的數(shù)據(jù)clock=0;delayus(10);}return k;//返回值}uchar shuchu_549()//數(shù)據(jù)得讀取{uchar date;cs=0;//片選低電平時數(shù)據(jù)有效date=read_549();//將read_549（）函數(shù)中采集到的數(shù)據(jù)付給變量datecs=1;//片選拉高，表示數(shù)據(jù)讀取完畢delayus(50);return date;//返回值}void main(){uint i=0,n=0,m=0;uchar k0,k1,k2,k3,k4,temp;uchar t1,t2,t3,t4;chushihua();write_5615(0);write_com(0x80+0x00);write_date('O');write_com(0x80+0x01);write_date('X');write_com(0x80+0x03);write_date('N');write_com(0x80+0x04);write_date('u');write_com(0x80+0x05);write_date('m');write_com(0x80+0x06);write_date(':');write_com(0x80+0x40);write_date('D'); write_com(0x80+0x41);write_date('i');write_com(0x80+0x42);write_date('a');write_com(0x80+0x43);write_date('n');write_com(0x80+0x45);write_date('Y');write_com(0x80+0x46);write_date('a');write_com(0x80+0x47);write_date(':');write_com(0x80+0x4a);write_date('.');write_com(0x80+0x4f);write_date('V'); while(1){if(key1==0){n++;if(n==50)n=0;while(!key1);}if(key2==0){n--;if(n==0)n=50;while(!key2);} write_5615(20*n);delayus(30);k0=shuchu_549();temp=k0;       k1=k0/100;k2=k0%100;k3=k2/10;k4=k2%10;t1=(uint)(temp*0.0186);t2=(uint)(temp*0.186)%10;t3=(uint)(temp*1.86)%10;t4=(uint)(temp*18.6)%10;write_com(0x80+0x08);//代碼write_date(num[k1]);write_com(0x80+0x09);write_date(num[k3]);write_com(0x80+0x0a);write_date(num[k4]);write_com(0x80+0x49);//電壓write_date(num[t1]);write_com(0x80+0x4b);write_date(num[t2]);write_com(0x80+0x4c);write_date(num[t3]);write_com(0x80+0x4d);write_date(num[t4]);  } }/*void delay(uint time)//延時函數(shù)（運行的時間與晶振有關(guān)系）{uint i,j;for(i=time;i>0;i--)for(j=110;j>0;j--);} */void write_com(uchar mingling)//命令輸入函數(shù){uchar gao,di; //定義高、低四位gao=mingling0xf0;//分出高四位di=(mingling4)0xf0;//分出低四位//==========================================讀走高四位P2=gao;//讓數(shù)據(jù)（mingling）高四位有效rs=0;//rs端為低電平時，為接收命令 delayus(8);en=1; //en一個高脈沖讀走高四位數(shù)據(jù)（mingling）delayus(10);en=0;//把使能端拉回低電平//============================================讀走低四位delayus(8); P2=di;//讓數(shù)據(jù)(mingling)低四位有效rs=0;//rs端為低電平時，為接收命令delayus(8);en=1 ;//en一個高電平讀走低四位命令（mingling）delayus(10);en=0;//把使能端拉回低電平}void write_date(uchar shuju)//數(shù)據(jù)輸入函數(shù){uchar gao,di;gao=shuju0xf0;//分出高四位di=(shuju4)0xf0;//分出低四位//=======================================讀走高四位P2=gao;//讓數(shù)據(jù)（shuju）高四位有效rs=1;//rs端為高電平時，為接收數(shù)據(jù)delayus(8);en=1;//en一個高電平讀走低四位數(shù)據(jù) (shuju)delayus(10);en=0;//把使能端拉回低電平//============================================讀走低四位delayus(8);P2=di;//讓數(shù)據(jù)（shuju）低四位有效rs=1;//rs端為高電平時，為接收數(shù)據(jù)delayus(8);en=1;//en一個高電平讀走低四位數(shù)據(jù)（shuju）delayus(10);en=0;//把使能端拉回低電平}void chushihua(){rw=0;//把數(shù)據(jù)/命令選擇端先置為零en=0;//把使能端先置為零write_com(0x28);//設(shè)置16*12顯示，5*7點陣，4位數(shù)據(jù)接口write_com(0x01);//清屏write_com(0x0c);//顯示開啟，不顯示光標(biāo)write_com(0x06);//整屏不移動}