C51单片机产生不用波形图的设计

控制/MCU

1883人已加入

描述

用单片机产生方波、锯齿波、三角波、梯形波,频率可调

#include

#defineucharunsignedchar

#defineuintunsignedint

unsignedcharx=0,m=0,y=128;

sbitWR_DA=P2^1;

sbitCS_DA=P2^0;//DA与 单片机 的接口

sbitS0=P3^0;//波形选择,每次按下将产生不同的波形

sbitS1=P3^1;//频率减

sbitS2=P3^2;//频率加

sbitS3=P3^3;//调节方波的占空比

ucharcodeSinTab[256]={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,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,0x89,0x86,0x83,0x80,0x80,0x7c,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

,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};

voiddelayms(uintt)

{

uinti;

while(t--)

{

for(i=0;i《125;i++);//对于11.0592M时钟,约延时1ms

}

}

voiddelay(uintt)

{

uinti;

for(i=t;i》0;i--);

}

voidtime0_init()

{

TMOD|=0x01;//定时器设置16位

TH0=-50000/256;

TL0=-50000%256;//初始化值

ET0=1;

TR0=1;

EA=1;

}

voidtime0_int(void)interrupt1

{

TR0=0;//关闭定时器

TH0=-50000/256;

TL0=-50000%256;//重装初值

if(S0==0)

{

delayms(10);//按键消抖

if(S0==0)m++;

while(!S0);//松手检测

}

if(S1==0)

{

delayms(10);

if(S1==0)x=x+1;

while(!S1);//松手检测

}

if(S2==0)

{

delayms(10);

if(S2==0)x=x-1;

while(!S2);//松手检测

}

if(S3==0)

{

delayms(10);

if(S3==0)y=y+5;

while(!S3);//松手检测

}

if(y》254)y=0;

if(m》5)m=0;

if(x》50)x=0;

TR0=1;//启动定时器

}

voidfangbo()//方波

{

uchari,j;

j=255-y;

CS_DA=0;

WR_DA=0;

for(i=y;i》0;i--)

{

P0=0;

delay(x);

}

while(j--)

{

P0=255;

delay(x);

}

}

voidjuchi()//锯齿波

{

uchari;

CS_DA=0;

WR_DA=0;

for(i=255;i》0;i--)

{

P0=i;

delay(x);

}

}

voidsanjiao()//三角波

{

uchari;

CS_DA=0;

WR_DA=0;

for(i=0;i《255;i++)

{

P0=i;

delay(x);

}

while(i--)

{

P0=i;

delay(x);

}

}

voidtixing()//梯形波

{

uchari=255,j,k;

CS_DA=0;

WR_DA=0;

while(i--)

{

P0=i;

delay(x);

}

for(j=0;j《100;j++)

{

P0=0;

delay(x);

}

for(k=0;k《255;k++)

{

P0=k;

delay(x);

}

}

voidsin()//正弦波

{

uchara;

CS_DA=0;

WR_DA=0;

for(a=0;a《255;a++)

{

P0=SinTab[a];

delay(x);

}

}

main()

{

time0_init();

while(1)

{

switch(m)

{

case0:

fangbo();//方波

break;

case1:

juchi();//锯齿波

break;

case2:

sanjiao();//三角波

break;

case3:

sin();//正弦波

break;

case4:

tixing();//梯形波

break;

default:fangbo();

}

}

}

打开APP阅读更多精彩内容
声明:本文内容及配图由入驻作者撰写或者入驻合作网站授权转载。文章观点仅代表作者本人,不代表电子发烧友网立场。文章及其配图仅供工程师学习之用,如有内容侵权或者其他违规问题,请联系本站处理。 举报投诉

全部0条评论

快来发表一下你的评论吧 !

×
20
完善资料,
赚取积分