51單片機+DAC0832產生正弦波電路Proteus仿真+代碼

利用51單片機搭建正弦波產生電路仿真原理圖如下（proteus仿真工程文件可到本帖附件中下載）



單片機源程序如下:

1. #include<reg52.h>  
   
2. #define uint   unsigned int                                          
   
3. #define uchar  unsigned char
   
4. #define uchar  unsigned char
   
5. sbit wr2=P3^7;  
   
6. sbit rs = P2^6;              
   
7. sbit rw= P2^5;
   
8. sbit ep = P2^7;
   
9. sbit gn=P2^4;
   
10. sbit up=P2^3;
    
11. sbit down=P2^2;
    
12. sbit S1=P2^0;
    
13. sbit S2=P2^1;
    
14. sbit wr1=P3^0;
    
15. sbit dir1=P3^1;
    
16. sbit dir2=P3^4;  
    
17. uchar j,k=39,flag,amp=0xfa;
    
18. uint freq;  
    
19. code uchar v[]="amplitude:";      
    
20. uchar vv[5];  
    
21. code uchar f[]="freqency:";  
    
22. code uint fj[40]={999,744,591,490,419,366,325,292,265,243,224,208,194,181,171,
    
23.                         161,153,145,138,132,126,121,116,111,107,104,100,97,94,91,85,81,74,71,67,64,60,57,53,50};  
    
24. code uchar sj[]={0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,31,33,36,38,40,42,45,48,51,55};   
    
25. uchar fv[6];
    
26. code uchar sin[]={0x7F,0x84,0x88,0x8D,0x91,0x96,0x9B,0x9F,0xA4,0xA8,0xAC,0xB1,0xB5,0xB9,0xBD,0xC1,0xC5,0xC9,
    
27.               0xCD,0xD0,0xD4,0xD7,0xDA,0xDE,0xE1,0xE4,0xE6,0xE9,0xEB,0xEE,0xF0,0xF2  ,0xF4,0xF6,0xF7,0xF9,0xFA,0xFB,
    
28.         0xFC,0xFD,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFD  ,0xFD,0xFC,0xFB,0xF9,0xF8,0xF7,0xF5,0xF3,0xF1,0xEF,0xED,
    
29.         0xEA,0xE8,0xE5,0xE2,0xDF  ,0xDC,0xD9,0xD5,0xD2,0xCE,0xCB,0xC7,0xC3,0xBF,0xBB,0xB7,0xB3,0xAE,0xAA,0xA6,0xA1,
    
30.         0x9D,0x98,0x94,0x8F,0x8B,0x86,0x81,0x7D,0x78,0x73,0x6F,0x6A,0x66,0x61,0x5D,0x58  ,0x54,0x50,0x4B,0x47,0x43,
    
31.         0x3F,0x3B,0x37,0x33,0x30,0x2C,0x29,0x25,0x22,0x1F,0x1C  ,0x19,0x16,0x14,0x11,0x0F,0x0D,0x0B,0x09,0x07,0x06,
    
32.         0x05,0x03,0x02,0x01,0x01,0x00  ,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x03,0x04,0x05,0x07,0x08,0x0A,0x0C,
    
33.         0x0E,0x10,0x13,0x15,0x18,0x1A,0x1D,0x20,0x24,0x27,0x2A,0x2E,0x31,0x35,0x39,0x3D,0x41,0x45,0x49,0x4D,0x52,0x56,
    
34.   0x5A,0x5F,0x63,0x68,0x6D,0x71,0x76,0x7A,0x7F};   
    
35. void delay(uchar z)
    
36. {   
    
37. uchar x,y;   
    
38. for(x=z;x>0;x--)     
    
39. for(y=110;y>0;y--);
    
40. }   
    
41. void write_com(uchar com)
    
42. {   
    
43. rs=0;  
    
44. P0=com;   
    
45. delay(5);      //?nop????????
    
46. ep=1;  
    
47. delay(5);  
    
48. ep=0;  
    
49. }
    
50. void write_data(uchar date)
    
51. {
    
52.         rs=1;
    
53.         P0=date;
    
54.         delay(5);
    
55.         ep=1;
    
56.         delay(5);
    
57.         ep=0;
    
58. }
    
59. void init_1602()
    
60. {   
    
61. rw=0;   
    
62. write_com(0x38);  
    
63. delay(1);   
    
64. write_com(0x0c);
    
65. delay(1);   
    
66. write_com(0x06);  
    
67. delay(1);   
    
68. write_com(0x01);  
    
69. delay(1);
    
70. }   
    
71. void display_1602(uchar *v)
    
72. {   
    
73. uchar i=0;   
    
74. while(v[i]!='\0')  
    
75. {   
    
76. write_data(v[i]);   
    
77. i++;   
    
78. delay(1);  
    
79. }
    
80. }   
    
81. void dealv(uchar amp)
    
82. {   
    
83. int i;   
    
84. i=amp*10;  
    
85. i=i/50;   
    
86. vv[0]=i/10+48;  
    
87. vv[1]='.';   
    
88. vv[2]=i%10+48;  
    
89. vv[3]='V';  
    
90. vv[4]='\0';
    
91. }   
    
92. void dealf()
    
93. {   
    
94. freq=fj[k];   
    
95. fv[0]=freq/100+48;  
    
96. fv[1]=freq%100/10+48;  
    
97. fv[2]=freq%10+48;  
    
98. fv[3]='H';  
    
99. fv[4]='z';  
    
100. fv[5]='\0';   
     
101. freq=0;        //????
     
102.         }   
     
103. void fudu(uchar amp)
     
104. {
     
105. P1=amp;  
     
106. wr1=0;     
     
107. delay(1);  
     
108. wr1=1;
     
109. }   
     
110. void keyscan1()
     
111. {   
     
112. if(gn==0)  
     
113. {   
     
114. delay(20);   
     
115. if(gn==0);   
     
116. {   
     
117. while(!gn);   
     
118. flag^=0x01;   
     
119. }  
     
120. }     
     
121. if(flag)  
     
122. {      
     
123. dir1=0;   
     
124. if(up==0)      
     
125. {   
     
126. delay(10);   
     
127. if(up==0);   
     
128. {     
     
129. while(!up);     
     
130. dir2^=1;     
     
131. amp+=5;     
     
132. if(amp>250) amp=0;  //??????     
     
133. fudu(amp);     
     
134. dealv(amp);     
     
135. write_com(0x80+10);     
     
136. display_1602(vv);   
     
137. }      
     
138. }  
     
139. if(down==0)     
     
140. {   
     
141. delay(100);   
     
142. if(down==0);   
     
143. {   
     
144. while(!down);   
     
145. dir2^=1;     
     
146. amp-=5;     
     
147. if(amp==0)  amp=250;
     
148. fudu(amp);     
     
149. dealv(amp);     
     
150. write_com(0x80+10);     
     
151. display_1602(vv);   
     
152. }     
     
153. }  
     
154. }  
     
155. else  
     
156. {      
     
157. dir1=1;   
     
158. if(up==0)     
     
159. {   
     
160. delay(100);   
     
161. if(up==0);   
     
162. {     
     
163. while(!up);     
     
164. dir2^=1;     
     
165. k++;     
     
166. delay(10);     
     
167. if(k>39) k=0; //???????     
     
168. dealf();     
     
169. write_com(0xc0+10);              
     
170. display_1602(fv);   
     
171. }      
     
172. }  
     
173. if(down==0)     
     
174. {   
     
175. delay(80);   
     
176. if(down==0);   
     
177. {     
     
178. while(!down);     
     
179. dir2^=1;   
     
180. k--;     
     
181. delay(10);    //  
     
182. if(k>=250)  k=39;       
     
183. dealf();     
     
184. write_com(0xc0+10);              
     
185. display_1602(fv);   
     
186. }      
     
187. }  
     
188. }        
     
189. }
     
190. void main()
     
191. {   
     
192. uchar i;     
     
193. fudu(amp);  
     
194. init_1602();   
     
195. write_com(0x80);  
     
196. display_1602(v);  
     
197. write_com(0xc0);  
     
198. display_1602(f);  
     
199. dealv(amp);   
     
200. write_com(0x80+10);  
     
201. display_1602(vv);  
     
202. dealf();   
     
203. write_com(0x80+0x40+10);  
     
204. display_1602(fv);         
     
205. while(1)  
     
206. {     
     
207. keyscan1();   
     
208. for(j=0;j<173;j++)   
     
209. {      
     
210. P1=sin[j];   
     
211. wr2=0;   
     
212. for(i=sj[k];i>0;i--);                              //??????????     
     
213.         wr2=1;
     
214. for(i=sj[k];i>0;i--);
     
215. wr2=1;  
     
216. }  
     
217. }
     
218. }
     

復制代碼

所有資料51hei提供下載:
51 正弦波.zip (68.17 KB, 下載次數: 80)

2019-1-19 11:40 上傳

點擊文件名下載附件
下載積分: 黑幣 -5

請問一下，如果想把它的分辨率提高成256的話，如何修改數據呢？

請問S1 S2 dir1 dir2有什么用呢