multisim秒信号发生器_单片机20Hz~20KHz频率可调三种波形信号发生器Multisim仿真与代码...

#include

#include

#include

#define uchar unsigned char

#define  data_OUT  XBYTE[0x7FFF]

char code dat[]={0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8

,0xab,0xae,0xb1,0xb4,0xb7,0xbc,0xbf,0xc2,0xc5,0xc7,0xca,0xcc,0xcf,0xd1,

0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,0xee,0xf1,

0xf2,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,

0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,

0xfd,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf3,0xf2,0xf1,0xef,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,0x5d,0x5a,0x57,0x55,0x51,0x4e,0x4c,0x48,0x45,0x43,0x40,0x3d,0x3a,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};

bit flag=0;

void delay(unsigned  int N)

{

int i;

for(i=0;i

}

void conversion_once_0832(unsigned char out_data)

{

data_OUT=out_data; //输出数据

delay(10);         //延时等待转换

}

uchar  keyscan()

{

uchar key;

if(P1!=0xff)

{

delay(61);

key=P1;

if(key!=0xff)

flag=~flag;

return(key);

}

}

void triangle()

{

uchar k;

for(k=0;k<255;k++)

conversion_once_0832(k);

for(;k>0;k--)

conversion_once_0832(k);

}

void pulse()

{

conversion_once_0832(0xff);

delay(1000);

conversion_once_0832(0x00);

delay(1000);

}

void fun3()

{

uchar j;

for(j=0;j<255;j++)

conversion_once_0832(j);

}

void fun4()

{

uchar i;

for(i=0;i<255;i++)

{

conversion_once_0832(dat[i]);

}

}

void main()

{

uchar temp;

while(1)

{

temp=keyscan();

switch(temp)

{

case 0xfe:

do{

triangle();

}while(keyscan()&&(flag==1));break;

case 0xfd: do{

pulse();

}while(keyscan()&&(flag==1));break;

case 0xfb: do{

fun3();

}while(keyscan()&&(flag==1));break;

case 0xf7: do{

fun4();

}while(keyscan()&&(flag==1));break;

default: break;

}

}

}