單片機產生方波鋸齒波三角波程序
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基于單片機產生方波、鋸齒波、三角波程序.doc
(34 KB, 下載次數: 9)
2017-5-15 09:41 上傳
點擊文件名下載附件
- #include<reg51.h>
- #define uchar unsigned char
- #define uint unsigned int
- unsigned char x=0,m=0,y=128;
- sbit WR_DA=P2^1;
- sbit CS_DA=P2^0;//DA與單片機的接口
- sbit S0=P3^0; //波形選擇，每次按下將產生不同的波形
- sbit S1=P3^1; //頻率減
- sbit S2=P3^2; //頻率加
- sbit S3=P3^3; //調節方波的占空比
- uchar code SinTab[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 };
- void delayms(uint t)
- {
- uint i;
- while(t--)
- {
- for (i=0;i<125;i++);//對于11.0592M時鐘，約延時1ms
- }
- }
- void delay(uint t)
- {
- uint i;
- for (i=t;i>0;i--);
- }
- void time0_init()
- {
- TMOD|=0x01; //定時器設置 16位
- TH0=-50000/256;
- TL0=-50000%256;//初始化值
- ET0=1;
- TR0=1;
- EA=1;
- }
- void time0_int(void) interrupt 1
- {
- TR0=0;//關閉定時器
- TH0=-50000/256;
- TL0=-50000%256;//重裝初值
- if(S0==0)
- {
- delayms(10);//按鍵消抖
- if(S0==0) m++;
- while(!S0);//松手檢測
- }
- if(S1==0)
- {
- delayms(10);
- if(S1==0) x=x+1;
- while(!S1);//松手檢測
- }
- if(S2==0)
- {
- delayms(10);
- if(S2==0) x=x-1;
- while(!S2);//松手檢測
- }
- if(S3==0)
- {
- delayms(10);
- if(S3==0) y=y+5;
- while(!S3);//松手檢測
- }
- if(y>254) y=0;
- if(m>5) m=0;
- if(x>50) x=0;
- TR0=1;//啟動定時器
- }
- void fangbo() //方波
- {
- uchar i,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);
- }
- }
- void juchi() //鋸齒波
- {
- uchar i;
- CS_DA=0;
- WR_DA=0;
- for(i=255;i>0;i--)
- {
- P0=i;
- delay(x);
- }
- }
- void sanjiao() //三角波
- {
- uchar i;
- CS_DA=0;
- WR_DA=0;
- for(i=0;i<255;i++)
- {
- P0=i;
- delay(x);
- }
- while(i--)
- {
- P0=i;
- delay(x);
- }
- }
- void tixing() //梯形波
- {
- uchar i=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);
- }
- }
- void sin() //正弦波
- {
- uchar a;
- CS_DA=0;
- WR_DA=0;
- for(a=0;a<255;a++)
- {
- P0=SinTab[a];
- delay(x);
- }
- }
- main()
- {
- time0_init();
- while(1)
- {
- switch(m)
- {
- case 0:
- fangbo(); //方波
- break;
- case 1:
- juchi(); //鋸齒波
- break;
- case 2:
- sanjiao(); //三角波
- break;
- case 3:
- sin(); //正弦波
- break;
- case 4:
- tixing(); //梯形波
- break;
- default: fangbo();
- }
- }
- }
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