只能輸出方波，可以調(diào)頻率，但是按鍵三沒有反應(yīng)無法輸出正弦波和三角波，求指點(diǎn)怎么才能正確輸出
- #include "reg51.h"
- #define uchar unsigned char
- #define uint unsigned int
- #define key P1
- #define dataout P0
- /**********
- 正弦波數(shù)據(jù)表
- *************/
- uchar code sin_tab[256]=
- {0x80,0x83,0x85,0x88,0x8A,0x8D,0x8F,0x92,
- 0x94,0x97,0x99,0x9B,0x9E,0xA0,0xA3,0xA5,
- 0xA7,0xAA,0xAC,0xAE,0xB1,0xB3,0xB5,0xB7,
- 0xB9,0xBB,0xBD,0xBF,0xC1,0xC3,0xC5,0xC7,
- 0xC9,0xCB,0xCC,0xCE,0xD0,0xD1,0xD3,0xD4,
- 0xD6,0xD7,0xD8,0xDA,0xDB,0xDC,0xDD,0xDE,
- 0xDF,0xE0,0xE1,0xE2,0xE3,0xE3,0xE4,0xE4,
- 0xE5,0xE5,0xE6,0xE6,0xE7,0xE7,0xE7,0xE7,
- 0xE7,0xE7,0xE7,0xE7,0xE6,0xE6,0xE5,0xE5,
- 0xE4,0xE4,0xE3,0xE3,0xE2,0xE1,0xE0,0xDF,
- 0xDE,0xDD,0xDC,0xDB,0xDA,0xD8,0xD7,0xD6,
- 0xD4,0xD3,0xD1,0xD0,0xCE,0xCC,0xCB,0xC9,
- 0xC7,0xC5,0xC3,0xC1,0xBF,0xBD,0xBB,0xB9,
- 0xB7,0xB5,0xB3,0xB1,0xAE,0xAC,0xAA,0xA7,
- 0xA5,0xA3,0xA0,0x9E,0x9B,0x99,0x97,0x94,
- 0x92,0x8F,0x8D,0x8A,0x88,0x85,0x83,0x80,
- 0x7D,0x7B,0x78,0x76,0x73,0x71,0x6E,0x6C,
- 0x69,0x67,0x65,0x62,0x60,0x5D,0x5B,0x59,
- 0x56,0x54,0x52,0x4F,0x4D,0x4B,0x49,0x47,
- 0x45,0x43,0x41,0x3F,0x3D,0x3B,0x39,0x37,
- 0x35,0x34,0x32,0x30,0x2F,0X2D,0x2C,0X2A,
- 0x29,0x28,0x26,0x25,0x24,0x23,0x22,0x21,
- 0x20,0x1F,0x1E,0x1D,0x1D,0x1C,0x1C,0x1B,
- 0x1B,0x1A,0x1A,0x1A,0x19,0x19,0x19,0x19,
- 0x19,0x19,0x19,0x19,0x1A,0x1A,0x1A,0x1B,
- 0x1B,0x1C,0x1C,0x1D,0x1D,0x1E,0x1F,0x20,
- 0x21,0x22,0x23,0x24,0x25,0x26,0x28,0x29,
- 0X2A,0x2C,0X2D,0x2F,0x30,0x32,0x34,0x35,
- 0x37,0x39,0x3B,0x3D,0x3F,0x41,0x43,0x45,
- 0x47,0x49,0x4B,0x4D,0x4F,0x52,0x54,0x56,
- 0x59,0x5B,0x5D,0x60,0x62,0x65,0x67,0x69,
- 0x6C,0x6E,0x71,0x73,0x76,0x78,0x7B,0x7D};
- /*************
- 三角波數(shù)據(jù)表
- *************************/
- uchar code thr_tab[256]=
- {
- 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,
- 0x89,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,
- 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,
- 0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,
- 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,
- 0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,
- 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,
- 0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,
- 0xBF,0xBE,0xBD,0xBC,0xBB,0xBA,0xB9,0xB8,
- 0xB7,0xB6,0xB5,0xB4,0xB3,0xB2,0xB1,0xB0,
- 0xAF,0xAE,0xAD,0xAC,0xAB,0xAA,0xA9,0xA8,
- 0xA7,0xA6,0xA5,0xA4,0xA3,0xA2,0xA1,0xA0,
- 0x9F,0x9E,0x9D,0x9C,0x9B,0x9A,0x99,0x98,
- 0x97,0x96,0x95,0x94,0x93,0x92,0x91,0x90,
- 0x8F,0x8E,0x8D,0x8C,0x8B,0x8A,0x89,0x89,
- 0x87,0x86,0x85,0x84,0x83,0x82,0x81,0x80,
- 0x7F,0x7E,0x7D,0x7C,0x7B,0x7A,0x79,0x78,
- 0x77,0x76,0x75,0x74,0x73,0x72,0x71,0x70,
- 0x6F,0x6E,0x6D,0x6C,0x6B,0x6A,0x69,0x68,
- 0x66,0x66,0x65,0x64,0x63,0x62,0x61,0x60,
- 0x5F,0x5E,0x5D,0x5C,0x5B,0x5A,0x59,0x58,
- 0x55,0x55,0x55,0x54,0x53,0x52,0x51,0x50,
- 0x4F,0x4E,0x4D,0x4C,0x4B,0x4A,0x49,0x48,
- 0x44,0x44,0x45,0x44,0x43,0x42,0x41,0x40,
- 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,
- 0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F,
- 0x50,0x51,0x52,0x53,0x55,0x55,0x56,0x57,
- 0x58,0x59,0x5A,0x5B,0x5C,0x5D,0x5E,0x5F,
- 0x60,0x61,0x62,0x63,0x66,0x65,0x66,0x67,
- 0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,
- 0x70,0x71,0x72,0x73,0x77,0x75,0x76,0x77,
- 0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F
- };
- /******************************************/
- uint data THHL=65535;
- uchar data keyword,n=0;
- bdata sinthr;
- sbit sin_thr=sinthr^0;
- sbit fb=P2^1;
- /**************
- 鍵掃描子函數(shù)
- **************************/
- keyscan()
- {
- keyword=key&0x07;
- if(keyword!=0x07)
- {
- while((key&0x07)!=0x07);
- switch(keyword)
- {
- case 6:
- {if(THHL>=65235)THHL=65535;else{THHL=THHL+255;}break;}
- case 5:
- {if(THHL<=500)THHL=0;else{THHL=THHL-255;}break;}
- case 3:
- {sin_thr=~sin_thr;break;}
- default:{break;}
- }
- }
- }
- /**********
- 初始化函數(shù)
- **************************/
- void clearmen()
- {
- key=0xff,dataout=0x00;THHL=65535;
- TH1=THHL/256;TL1=THHL&256;
- TMOD=0x11;ET1=1;TR1=1;EA=1;
- }
- /***********
- 主函數(shù)
- *************************/
- main()
- {
- clearmen();
- while(1)
- {
- keyscan();
- }
- }
- /************T1
- 中斷函數(shù)
- *************************/
- void time_intt1(void) interrupt 3
- {
- EA=0;TR1=0;TH1=THHL/256;TL1=THHL%256;TR1=1;
- if(sin_thr){dataout=sin_tab[n];}
- else {dataout=thr_tab[n];}
- if(n>=255){n=0;}else{n++;}
- fb=~fb;
- EA=1;
- }
|
QQ好友和群
QQ空間
騰訊微博
騰訊朋友
收藏
淘帖
頂
踩
