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標題: 51單片機輸出正弦波 [打印本頁]

作者: 偽裝者 時間: 2017-3-31 22:03
標題: 51單片機輸出正弦波

#include<reg51.h>

#include<intrins.h>

sbit wr=P3^6;

sbit cs=P3^0;

unsigned char k,t;

sbit key=P3^1;

void keyscan();

unsigned char code Table[]={

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};

void Delay(int Time_ms);

void main()

{

k=4;

cs=0;

while(1)

{

wr=1;

P0=Table[t];

wr=0;

keyscan();

Delay(k);

t++;

if(t==256) t=0;

}

void Delay(int Time_u)

{

int i;

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

{

_nop_();

}

void keyscan()

{

if(key==0) k=k+10; if(k==54) k=4;

}

作者: 路明非. 時間: 2018-7-2 20:09
求大神解釋一下

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