1. /***************************************************************************************************
   
2. *AT89C52RC单片机操作8个led灯
   
3. *菜鸟一号
   
4. *2012.5.8
   
5. ****************************************************************************************************/
   
6. #include<reg52.h>
   
7. //sbit LED=P2^0;
   
8. typedef unsigned int uInt;
   
9. typedef unsigned char uChar;
   
10. 
    
11. void delay(uInt);            //the function to delay for a moment
    
12. void BothToMid();
    
13. void MidToBoth();
    
14. void LeftToRight();
    
15. void RightToLeft();
    
16. void Lighter();
    
17. void Darker();
    
18. /************************************************main()********************************************/
    
19. void main()
    
20. {
    
21.   void BothToMid();
    
22.   void MidToBoth();
    
23.   void LeftToRight();
    
24.   void RightToLeft();
    
25.   void Lighter();
    
26.   void Darker();
    
27.   while(1)
    
28.   {
    
29.    
    
30.     BothToMid();
    
31.     MidToBoth();
    
32.         LeftToRight();
    
33.         RightToLeft();
    
34.         Lighter();
    
35.         Darker();
    
36.         delay(500);
    
37.        
    
38.   }
    
39. }
    
40. /*************************************************
    
41. *function: delay for a moment
    
42. *input:    time     type:unsigned int
    
43. *output:   none
    
44. **************************************************/
    
45. void delay(uInt time)
    
46. {
    
47.   uInt i;
    
48.   uChar j;
    
49.   for(i=0;i<time;i++)
    
50.      for(j=0;j<125;j++);
    
51. }
    
52. /**************************************************
    
53. *function: let the led light from left to right one by one
    
54. *input:    none
    
55. *output:   none
    
56. ***************************************************/
    
57. void LeftToRight()
    
58. {
    
59.     uChar i;
    
60.     uChar temp=0xfe;
    
61.         for(i=0;i<8;i++)
    
62.         {
    
63.          P2=temp;
    
64.          temp=(temp<<1)|1;
    
65.          delay(500);
    
66.          }
    
67. }
    
68. /**************************************************
    
69. *function: let the led light from  right to left one by one
    
70. *input:    none
    
71. *output:   none
    
72. ***************************************************/
    
73. void RightToLeft()
    
74. {
    
75.     uChar i;
    
76.     uChar temp=0x7f;
    
77.         for(i=0;i<8;i++)
    
78.         {
    
79.          P2=temp;
    
80.          temp=(temp>>1)|0x80;
    
81.          delay(500);
    
82.          }
    
83. }
    
84. /***************************************************
    
85. *function: let the led light from both edge to middle one by one
    
86. *input:    none
    
87. *output:   none
    
88. ****************************************************/
    
89. void BothToMid()
    
90. {
    
91.   uChar temp[4]={0x7e,0xbd,0xdb,0xe7};
    
92.   uChar i;
    
93.   for(i=0;i<4;i++)
    
94.   {
    
95.     P2=temp[i];
    
96.         delay(1000);
    
97.   }
    
98. }
    
99. /****************************************************
    
100. *function: let the led light from middle to both edge one by one
     
101. *input:    none
     
102. *output:   none
     
103. *****************************************************/
     
104. void MidToBoth()
     
105. {
     
106.   
     
107.   uChar temp[4]={0xe7,0xdb,0xbd,0x7e,};
     
108.   uChar j;
     
109.   for(j=0;j<4;j++)
     
110.   {
     
111.     P2=temp[j];
     
112.         delay(1000);
     
113.   }
     
114. }
     
115. /*****************************************************
     
116. *function :wait for a moment to let the led become lighter or darker
     
117. *input: timer   type:unsigned char
     
118. *output: none
     
119. *******************************************************/
     
120. void delay1(uChar timer)
     
121. {
     
122.   uChar i;
     
123.   while(timer--)
     
124.   {
     
125.    for(i=0;i<1;i++);
     
126.   }
     
127. }
     
128. /******************************************************
     
129. *function:let the led become lighter and lighter
     
130. *input:none
     
131. *output:none
     
132. ********************************************************/
     
133. void Lighter()
     
134. {
     
135. void delay1(uChar);
     
136. uChar maxNum;
     
137. uChar timer;
     
138. unsigned char j;
     
139. P2=0xff;
     
140. maxNum=250;
     
141. timer=0;
     
142. 
     
143. for(j=0;j<maxNum;j++)
     
144. {
     
145.    timer++;
     
146.    delay1(timer);
     
147.    P2=0xff;
     
148.    timer=~timer;
     
149.    delay1(timer);
     
150.    P2=0x00;
     
151.    timer=~timer;
     
152.    
     
153. }
     
154. }
     
155. /*********************************************************
     
156. *function:let the led become darker and darker
     
157. *input:none
     
158. *output:none
     
159. **********************************************************/
     
160. void Darker()
     
161. {
     
162. void delay1(uChar);
     
163. uChar maxNum;
     
164. uChar timer;
     
165. unsigned char j;
     
166. P2=0x00;
     
167. maxNum=250;
     
168. timer=0;
     
169. 
     
170. for(j=0;j<maxNum;j++)
     
171. {
     
172.    timer++;
     
173.    delay1(timer);
     
174.    P2=0x00;
     
175.    timer=~timer;
     
176.    delay1(timer);
     
177.    P2=0xff;
     
178.    timer=~timer;
     
179.    
     
180. }
     
181. }
     

复制代码楼主的代码格式还是很好看的~~~