0832锯.c

da0832的用法,希望能给大家提供帮助！

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
uchar code DB[257]={//正弦波的查表
 0x80,0x83,0x86,0x89,0x8D,0x90,0x93,0x96,   //1
 0x99,0x9C,0x9F,0xA2,0xA5,0xA8,0xAB,0xAE,   //2
 0xB1,0xB4,0xB7,0xBA,0xBC,0xBF,0xC2,0xC5,   //3
 0xC7,0xCA,0xCC,0xCF,0xD1, 0xD4,0xD6,0xD8,  //4
 0xDA,0xDD,0xDF,0xE1,0xE3, 0xE5,0xE7,0xE9,  //5
 0xEA,0xEC,0xEE,0xEF,0xF1, 0xF2,0xF4,0xF5,  //6
 0xF6,0xF7,0xF8,0xF9,0xFA, 0xFB,0xFC,0xFD,  //7
 0xFD,0xFE,0xFF,0xFF,0xFF, 0xFF,0xFF,0xFF,  //8
 0xFF,0xFF,0xFF,0xFF,0xFF, 0xFF,0xFE,0xFD,  //9
 0xFD,0xFC,0xFB,0xFA,0xF9, 0xF8,0xF7,0xF6,  //10
 0xF5,0xF4,0xF2,0xF1,0xEF, 0xEE,0xEC,0xEA,  //11
 0xE9,0xE7,0xE5,0xE3,0xE1, 0xDE,0xDD,0xDA,  //12
 0xD8,0xD6,0xD4,0xD1,0xCF, 0xCC,0xCA,0xC7,  //13
 0xC5,0xC2,0xBF,0xBC,0xBA, 0xB7,0xB4,0xB1,  //14
 0xAE,0xAB,0xA8,0xA5,0xA2, 0x9F,0x9C,0x99,  //15
 0x96,0x93,0x90,0x8D,0x89,0x86,0x83,0x80,   //16
0x80,                                        //17
 0x80, 0x7C, 0x79, 0x78, 0x72, 0x6F, 0x6C, 0x69,// 18
 0x66, 0x63, 0x60, 0x5D, 0x5A, 0x57, 0x55, 0x51, //19
 0x4E, 0x4C, 0x48, 0x45, 0x43, 0x40, 0x3D, 0x3A,//20
 0x38, 0x35, 0x33, 0x30, 0x2E, 0x2B, 0x29, 0x27,//21
 0x25, 0x22, 0x20, 0x1E, 0x1C, 0x1A, 0x18, 0x16, //22
 0x15, 0x13, 0x11, 0x10, 0x0E, 0x0D, 0x0B, 0x0A, //23
 0x09, 0x08, 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, //24
 0x02, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //25
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, //26
 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, //27
 0x0A, 0x0B, 0x0D, 0x0E, 0x10, 0x11, 0x13, 0x15, //28
 0x16, 0x18, 0x1A, 0x1C, 0x1E, 0x20, 0x22, 0x25,//29
 0x27, 0x29, 0x2B, 0x2E, 0x30, 0x33, 0x35, 0x38,//30
 0x3A, 0x3D, 0x40, 0x43, 0x45, 0x48, 0x4C, 0x4E, //31
 0x51, 0x55, 0x57, 0x5A, 0x5D, 0x60, 0x63, 0x66,//32
 0x69, 0x6C, 0x6F, 0x72, 0x76, 0x79, 0x7C, 0x80,//33
 };
void delay(uint N) //延时(16*N+24)us
{
 uint i;
 for(i=0;i<N;i++);
}

void main()
{
 uint i;
 P2=0xff;
 P2=0x00; 
while(1)
{ 
 for(i=0;i<=255;i++)
  {
   P2=DB[i];
   delay(10);
   }
/* for(i=255;i>=0;i--)
  {
   P2=i;
   delay(10);
   if(i==0) break;
   }*/
}
}