這是我做的信號發生器課設，用proteus畫的原理圖，keil4.1編寫的C語言。（都在壓縮包里）有不合理的地方請各位指點
仿真原理圖如下（proteus仿真工程文件可到本帖附件中下載）
001.jpg (79.51 KB, 下載次數: 68)
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這只是一部分原理圖
2018-1-15 22:35 上傳
0.jpg (34.64 KB, 下載次數: 57)
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2018-1-16 00:44 上傳
單片機源程序如下:
- #include<reg52.h>
- #define uchar unsigned char
- #define uint unsigned int
- #define DAdata P0 //DA數據端口
- sbit DA_S1=P2^0;
- sbit DA_S2=P2^1;
- sbit key =P3^2;
- uchar wavecount; //波形波碼計數標志
- uchar THtemp,TLtemp;//傳遞頻率的中間變量
- uchar judge=1; //用于方波函數，作標志
- uchar waveform; //波形計數標志，值不同代表不同的波形
- uchar code freq_unit[3]={10,50,200};//3種波形的頻率單位
- uchar idata wavefreq[3]={1,1,1}; //數組單元，用于存放單位頻率的個數
- uchar code lcd_hang1[]={"SineWave ""TriangleWave ""SquareWave " "sawtoothWave " "Select Wave " " Press No.1 key! "};
- uchar idata lcd_hang2[16]={"f= Hz "};
- uchar code waveTH[]={0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
- 0xf9,0xfc,0xfd,0xfe,0xfe,0xfe,0xff,0xff,0xff,0xff,
- 0xf6,0xfb,0xfd,0xfb,0xfe,0xff,0xff,0xff,0xff,0xff};
- /**********************************/
- uchar code waveTL[]={
- 0x79,0x3d,0x7e,0x9e,0xbe,0xbf,0xc8,0xcf,0xd4,0xd9,//正弦波頻率調整中間值
- 0xe8,0xf4,0xf8,0x7a,0x7c,0xfc,0x23,0x3d,0x53,0x64,//鋸齒波頻率調整中間值
- 0x3c,0x1e,0x8f,0x32,0xc7,0x63,0xb1,0xd8,0xec,0xf6};//方波頻率調整中間值
- /*********************************/
- uchar code sawtooth_tab[]={
- 0x00,0x04,0x08,0x0c,0x10,0x14,0x18,0x1c,0x20,0x24,0x28,0x2c,
- 0x30,0x34,0x38,0x3c,0x40,0x44,0x48,0x4c,0x50,0x54,0x58,0x5c,
- 0x60,0x64,0x68,0x6c,0x70,0x74,0x78,0x7c,0x80,0x84,0x88,0x8c,
- 0x90,0x94,0x98,0x9c,0xa0,0xa4,0xa8,0xac,0xb0,0xb4,0xb8,0xbc,
- 0xc0,0xc4,0xc8,0xcc,0xd0,0xd4,0xd8,0xdc,0xe0,0xe4,0xe8,0xec,
- 0xf0,0xf4,0xf8,0xfc};
- /*****************************/
- uchar code sine_tab[256]={
- 0x80,0x83,0x86,0x89,0x90,0x93,0x96,0x99,0x9c,0x9f,
- 0xa2,0xa5,0xa8,0xab,0xae,0xb1,0xb4,0xb7,0xba,0xbc,0xbf,
- 0xc2,0xc5,0xc7,0xca,0xcc,0xcf,0xd1,0xd4,0xd8,0xda,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,0x89,0x86,0x83,0x80,0x7c,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(uchar z)
- {
- uchar x,y;
- for(x=z;x>0;x--)
- for(y=110;y>0;y--);
- }
- /*
- void sawtooth_out()//鋸齒波輸出
- {
- uchar i;
- for(i=255;i>0;i--)
- {
- DAdata=i;
- DA_S1=0;//打開8位輸入寄存器
- DA_S1=1;//關閉8位輸入寄存器
- }
- }
- */
- void sawtooth_out()//鋸齒波輸出
- {
- DAdata=sawtooth_tab[wavecount++];
- if(wavecount>64) wavecount=0;
- DA_S1=0;//打開8位輸入寄存器
- DA_S1=1;
- }
- void sine_out()//正弦波輸出
- {
- DAdata=sine_tab[wavecount++];
- DA_S1=0;//打開8位輸入寄存器
- DA_S1=1;//關閉8位輸入寄存器
- }
- void square_out()//方波輸出
- {
- judge=~judge;
- if(judge==1)
- DAdata=0xff;
- else
- DAdata=0x00;
- DA_S1=0;//打開8位輸入寄存器
- DA_S1=1;//關閉8位輸入寄存器
- }
- /******************************/
- /**********1602***************/
- /****************************/
- #define lcd_ports P1
- sbit rs=P2^2;
- sbit rw=P2^3;
- sbit lcden=P2^4;
- void write_com(uchar com)
- {
- rs=0; //寫指令
- lcden=0;
- lcd_ports=com;
- delay(5);
- lcden=1;
- delay(5);
- lcden=0;
- }
- void write_date(uchar date)
- {
- rs=1; //寫數據
- lcden=0;
- lcd_ports=date;
- delay(10);
- lcden=1;
- delay(10);
- lcden=0;
- }
- void disp_lcd(uchar addr,uchar *temp1)
- {
- uchar num;
- write_com(addr);
- delay(1);
- for(num=0;num<16;num++)
- {
- write_date(temp1[num]);
- delay(10);
- }
- }
- void init_lcd()
- {
- lcden=0;
- rw=0; //初始化一定要設置為零，表示寫數據
- write_com(0x38);//使液晶顯示點陣，為下面做準備
- write_com(0x0c);//初始設置
- write_com(0x06);//初始設置
- write_com(0x01);//清零
- write_com(0x80);//使指針指向第一行第一格
- disp_lcd(0x80,&lcd_hang1[3*16]);//在第一行顯示
- disp_lcd(0xc0,&lcd_hang2[4*16]);//在第二行顯示
- }
- /**********************************************/
- void main()
- {
- DA_S2=0;
- DAdata=0;
- DA_S1=1; //關閉8位輸入寄存器
- init_lcd();
- waveform=0;
- TMOD=0x01;//設定定時器0為16位工作方式
- IT0=1;//設置外部中斷0為下降沿觸發
- ET0=1;//開定時器中斷
- EA=1;
- while(1)
- {
- }
- }
- void key_int0() interrupt 0
- {
- uchar keytemp;
- uint total_freq;//總頻率
- EA=0;
- TR0=0;
- delay(10);
- if(key==0) //判斷按鍵是否按下
- {
- keytemp=P3&0xf0;//獲取P3口高四位的值
- switch(keytemp) //根據按鍵次數選擇波形
- {
- case 0xe0:
- waveform++;
- if(waveform>2)waveform=0;
- break;
- case 0xd0:
- wavefreq[waveform]++; // 頻率按單位增加
- if(wavefreq[waveform]>10)wavefreq[waveform]=1;
- break;
- case 0xb0: // 頻率按單位遞減
- wavefreq[waveform]--;
- if(wavefreq[waveform]<1)wavefreq[waveform]=10;
- break;
- }
- THtemp=waveTH[waveform*10+(wavefreq[waveform]-1)];
- //方括號中選取第幾個數后，并把該值賦給T_temp
- TLtemp=waveTL[waveform*10+(wavefreq[waveform]-1)];
- ……………………
- …………限于本文篇幅 余下代碼請從51黑下載附件…………
所有資料51hei提供下載:
Jason.zip
(57.29 KB, 下載次數: 55)
2018-1-15 22:35 上傳
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