51-单片机和DAC0832输出方波、矩形波和正弦波由液晶1602显示的C语言程序

显示频率，幅度可调，可产生四种波形，正弦波，方波，锯齿波，三角波，希望你能喜欢，给你发了一张效果图，喜欢的话别忘了采纳我的回答啊#includereg52.h#defineucharunsignedchar#defineuintunsignedint#defineDAdataP0//DA数据端口sbitDA_S1=P2^0;//控制DAC0832的8位输入寄存器，仅当都为0时，可以输出数据(处于直通状态)，否则，输出将被锁存sbitDA_S2=P2^1;//控制DAC0832的8位DAC寄存器，仅当都为0时，可以输出数据(处于直通状态)，否则，输出将被锁存sbitkey=P3^2;ucharwavecount;//'抽点'计数ucharTHtemp,TLtemp;//传递频率的中间变量ucharjudge=1;//在方波输出函数中用于简单判别作用ucharwaveform;//当其为0、1、2时，分别代表三种波ucharcodefreq_unit[3]={10,50,200};//三种波的频率单位ucharidatawavefreq[3]={1,1,1};//给每种波定义一个数组单元，用于存放单位频率的个数ucharcodelcd_hang1[]={SineWaveTriangleWaveSquareWaveSelectWave:pressNo.1key!};ucharidatalcd_hang2[16]={f=Hz};ucharcodewaveTH[]={0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xec,0xf6,0xf9,0xfb,0xfc,0xfc,0xfd,0xfd,0xfd,0xfe};ucharcodewaveTL[]={0x06,0x8a,0x10,0x4e,0x78,0x93,0xa8,0xb3,0xbe,0xc6,//正弦波频率调整中间值0xac,0xde,0x48,0x7a,0x99,0xaf,0xbb,0xc8,0xd0,0xde,//三角波频率调整中间值0x88,0x50,0x90,0x32,0x34,0xbe,0x4a,0xa3,0xe5,0x2c};/*************************************************************************************************/ucharcodetriangle_tab[]={//每隔数字8，采取一次0x00,0x08,0x10,0x18,0x20,0x28,0x30,0x38,0x40,0x48,0x50,0x58,0x60,0x68,0x70,0x78,0x80,0x88,0x90,0x98,0xa0,0xa8,0xb0,0xb8,0xc0,0xc8,0xd0,0xd8,0xe0,0xe8,0xf0,0xf8,0xff,0xf8,0xf0,0xe8,0xe0,0xd8,0xd0,0xc8,0xc0,0xb8,0xb0,0xa8,0xa0,0x98,0x90,0x88,0x80,0x78,0x70,0x68,0x60,0x58,0x50,0x48,0x40,0x38,0x30,0x28,0x20,0x18,0x10,0x08,0x00};ucharcodesine_tab[256]={//输出电压从0到最大值（正弦波1/4部分）0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb1,0xb4,0xb7,0xba,0xbc,0xbf,0xc2,0xc5,0xc7,0xca,0xcc,0xcf,0xd1,0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,0xee,0xef,0xf1,0xf2,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,//输出电压从最大值到0（正弦波1/4部分）0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfd,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf2,0xf1,0xef,0xee,0xec,0xea,0xe9,0xe7,0xe5,0xe3,0xe1,0xde,0xdd,0xda,0xd8,0xd6,0xd4,0xd1,0xcf,0xcc,0xca,0xc7,0xc5,0xc2,0xbf,0xbc,0xba,0xb7,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99,0x96,0x93,0x90,0x8d,0x89,0x86,0x83,0x80,//输出电压从0到最小值（正弦波1/4部分）0x80,0x7c,0x79,0x76,0x72,0x6f,0x6c,0x69,0x66,0x63,0x60,0x5d,0x5a,0x57,0x55,0x51,0x4e,0x4c,0x48,0x45,0x43,0x40,0x3d,0x3a,0x38,0x35,0x33,0x30,0x2e,0x2b,0x29,0x27,0x25,0x22,0x20,0x1e,0x1c,0x1a,0x18,0x16,0x15,0x13,0x11,0x10,0x0e,0x0d,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00,//输出电压从最小值到0（正弦波1/4部分）0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0d,0x0e,0x10,0x11,0x13,0x15,0x16,0x18,0x1a,0x1c,0x1e,0x20,0x22,0x25,0x27,0x29,0x2b,0x2e,0x30,0x33,0x35,0x38,0x3a,0x3d,0x40,0x43,0x45,0x48,0x4c,0x4e,0x51,0x55,0x57,0x5a,0x5d,0x60,0x63,0x66,0x69,0x6c,0x6f,0x72,0x76,0x79,0x7c,0x80};voiddelay(ucharz){uintx,y;for(x=z;x0;x--)for(y=110;y0;y--);}voidtriangle_out()//三角波输出{DAdata=triangle_tab[wavecount++];if(wavecount64)wavecount=0;DA_S1=0;//打开8位输入寄存器DA_S1=1;//关闭8位输入寄存器}voidsine_out()//正弦波输出{DAdata=sine_tab[wavecount++];DA_S1=0;//打开8位输入寄存器DA_S1=1;//关闭8位输入寄存器}voidsquare_out()//方波输出{judge=~judge;if(judge==1)DAdata=0xff;elseDAdata=0x00;DA_S1=0;//打开8位输入寄存器DA_S1=1;//关闭8位输入寄存器}/************1602液晶的相关函数*************/#definelcd_portsP1sbitrs=P2^2;sbitrw=P2^3;sbitlcden=P2^4;voidwrite_com(ucharcom){rs=0;//置零，表示写指令lcden=0;lcd_ports=com;delay(5);lcden=1;delay(5);lcden=0;}voidwrite_date(uchardate){rs=1;//置1，表示写数据（在指令所指的地方写数据）lcden=0;lcd_ports=date;delay(5);lcden=1;delay(5);lcden=0;}voiddisp_lcd(ucharaddr,uchar*temp1){ucharnum;write_com(addr);delay(1);//延时一会儿???for(num=0;num16;num++){write_date(temp1[num]);//或者这样写write_date(*(temp1+num));delay(1);}}voidinit_lcd(){//ucharnum;lcden=0;//可有可无???rw=0;//初始化一定要设置为零，表示写数据write_com(0x38);//使液晶显示点阵，为下面做准备write_com(0x0c);//初始设置write_com(0x06);//初始设置write_com(0x01);//清零write_com(0x80);//使指针指向第一行第一格disp_lcd(0x80,&lcd_hang1[3*16]);//在第一行显示disp_lcd(0xc0,&lcd_hang1[4*16]);//在第二行显示}/********************1602液晶函数声明结束*********************/voidmain(){uchari=0;DA_S2=0;//使DAC寄存器处于直通状态DAdata=0;DA_S1=1;//关闭8位输入寄存器init_lcd();waveform=0;TMOD=0x01;//设置定时器0为16位工作方式IT0=1;//设置外部中断0为下降沿触发ET0=1;//开定时器中断EX0=1;EA=1;while(1){//DAout(0xff);//可输出TTL波形//DAout(0x80);//T_temp=32;}}voidtimer0()interrupt1{TH0=THtemp;TL0=TLtemp;if(waveform==0)sine_out();elseif(waveform==1)triangle_out();elseif(waveform==2)square_out();}voidkey_int0()interrupt0{ucharkeytemp;uinttotal_freq;//总频率EA=0;TR0=0;//关总中断与定时器delay(5);//延时够吗???if(key==0)//确实有按键按下而引发中断{keytemp=P3&0xf0;//获取P3口高四位的值switch(keytemp){case0xe0://选择波形waveform++;if(waveform2)waveform=0;break;case0xd0://频率按规定单位依次增加wavefreq[waveform]++;if(wavefreq[waveform]10)wavefreq[waveform]=1;///*这边要用“10”，因为它比“=11”可靠break;//性更高,使加数有个上限，不会一直加下去*/case0xb0://频率按规定单位依次衰减wavefreq[waveform]--;if(wavefreq[waveform]1)wavefreq[waveform]=10;//这边要用“1”，因为它比“=0”可靠性更高break;case0x70://TTL输出DA_S2=1;//使DAC寄存器关闭break;}THtemp=waveTH[waveform*10+(wavefreq[waveform]-1)];//方括号中选取第几个数后，并把该值赋给T_tem