标题: 液晶LCD1602滚动显示程序（单个字符，显示所有三种方式） [打印本页]

---

作者: liuqq    时间: 2015-5-20 18:15
标题: 液晶LCD1602滚动显示程序（单个字符，显示所有三种方式）
头文件：

1. #ifndef __LCD1602_H__
   
2. #define __LCD1602_H__
   
3. #include <reg51.h>
   
4. #include <string.h>
   
5. #include <stdlib.h>
   
6. #include <stdio.h>
   
7. #include <intrins.h >
   
8. #define uchar unsigned char
   
9. #define uint unsigned int
   
10. sbit RS = P2^6;
    
11. sbit RW = P2^5;
    
12. sbit EN = P2^7;
    
13. void delay(uint t);
    
14. void busy_wait();
    
15. void write_LCD_command(uchar cmd);
    
16. void write_LCD_data(uchar dat);
    
17. void initialize_LCD();
    
18. void LCD_showstring(uchar r,uchar c,uchar *str);
    
19. #endif
    

复制代码

主程序：

1. #include "LCD1602.h"
   
2. void delay50us(uint x)
   
3. {
   
4. uint i;
   
5. for(;x>0;x--)
   
6. for(i=19;i>0;i--);
   
7. }
   
8. void delay(uint t)
   
9. {
   
10. uint i;
    
11. while(t--)
    
12. {
    
13. for(i=0;i<120;i++) ;
    
14. }
    
15. }
    
16. void busy_wait()
    
17. {
    
18. uint LCD_status;
    
19. do
    
20. {
    
21. P0 = 0XFF;
    
22. EN = 0;
    
23. RS = 0;
    
24. RW = 1;
    
25. 
    
26. EN = 1;
    
27. LCD_status = P0;
    
28. EN = 0;
    
29. }while(LCD_status&0x80)        ;
    
30. }
    
31. void write_LCD_command(uchar cmd)
    
32. {
    
33. busy_wait();
    
34.     EN = 0;
    
35. RS = 0;
    
36. RW = 0;
    
37. P0 = cmd;
    
38. _nop_();
    
39. _nop_();
    
40. _nop_();
    
41. EN = 1;
    
42. _nop_();
    
43. _nop_();
    
44. _nop_();
    
45. _nop_();
    
46. EN = 0;
    
47. }
    
48. void write_LCD_data(uchar dat)
    
49. {
    
50. busy_wait();
    
51.     EN = 0;
    
52. RS = 1;
    
53. RW = 0;
    
54. P0 = dat;
    
55. EN = 1;
    
56. _nop_();
    
57. EN = 0;
    
58. }
    
59. void initialize_LCD()
    
60. {
    
61. write_LCD_command(0x38); delay(1);
    
62. write_LCD_command(0x01); delay(1);
    
63. write_LCD_command(0x06); delay(1);
    
64. write_LCD_command(0x0c); delay(1);
    
65. 
    
66. }
    
67. void LCD_showstring(uchar r,uchar c,uchar *str)
    
68. {
    
69. uchar i = 0;
    
70. code uint DDRAM[] = {0X80,0Xc0};
    
71. 
    
72.    write_LCD_command(DDRAM[r]|c);
    
73. for(i = 0; str[i]&&i<16;i++)
    
74. {
    
75.   write_LCD_data(str[i]) ;
    
76. }
    
77.     for(;i<16;i++)
    
78.     write_LCD_data(' ') ;
    
79. }  
    
80. 
    
81. #include "LCD1602.h"
    
82. sbit k1 = P0^6;
    
83. sbit k2 = P0^7;
    
84. sbit k3 = P0^5;
    
85. uchar   msg[]="happy everyday";
    
86. uchar   table1[]= "studing";
    
87. void H_scroll_display()             //字符滚动输出
    
88. {
    
89. uint i;
    
90. write_LCD_command(0X0C);
    
91.     LCD_showstring(0,0,table1);
    
92. delay(500);
    
93. loop1:
    
94. 
    
95.     for(i=0;i<=13;i++)
    
96. {
    
97. LCD_showstring(1,0,msg+i);
    
98. delay(500);
    
99.        if(k1 == 1)
    
100. {
     
101. return;
     
102. }
     
103. }
     
104. 
     
105. delay(1000);
     
106. goto loop1;  
     
107. }
     
108. void show_all_chars()          //显示LCD1602  字符编码表中的所有的字符
     
109. {
     
110.     uint i,j=0;
     
111. write_LCD_command(0X0C);
     
112.     LCD_showstring(0,0,"studing");
     
113.     LCD_showstring(1,0,"               ");
     
114. loop2:
     
115. write_LCD_command(0Xc0);
     
116. for(i=0x20;i!=0x00;i++)
     
117. {
     
118. if(i>=0x80&&i<=0x9f)
     
119. continue;
     
120. if((++j)%16 == 0)
     
121. {
     
122. delay(500);
     
123. LCD_showstring(1,0,"               ");
     
124.    write_LCD_command(0X0C);
     
125. j=0;
     
126. write_LCD_command(0Xc0);
     
127. }
     
128. write_LCD_data(i) ;
     
129.    delay(20);
     
130.       if(k2 == 0)
     
131. {
     
132. return;
     
133. }  
     
134. }
     
135. delay(500);
     
136. goto loop2;
     
137. }
     
138. uchar CGRAM1[][8]=
     
139. {
     
140. {0x80,0x0f,0x12,0x0f,0x0a,0x1f,0x02,0x00}, // 年
     
141. {0x0f,0x09,0x0f,0x09,0x0f,0x09,0x13,0x00}, // 月
     
142. {0x0f,0x09,0x09,0x0f,0x09,0x09,0x0f,0x00}  // 日
     
143. 
     
144. };
     
145. void write_CGRAM(uchar g[][8],uchar n)          //自定义的字符显示
     
146. {
     
147. uchar i,j;
     
148. write_LCD_command(0X40);
     
149. for(i=0;i<n;i++)
     
150. for(j=0;j<8;j++)
     
151. write_LCD_data(g[i][j]) ;
     
152. }
     
153. void display_chars()
     
154. {
     
155. uchar i;
     
156. LCD_showstring(1,0,"               ");
     
157. write_CGRAM(CGRAM1,3)        ;
     
158. write_LCD_command(0Xc0);
     
159. loop3:
     
160. for(i=0;i<3;i++)
     
161. {
     
162.    write_LCD_data(i) ;
     
163.     write_LCD_data(0x3f) ;
     
164. delay(100);
     
165. }
     
166. if(k3 == 0)
     
167. {
     
168. return;
     
169. }
     
170. delay(500);
     
171. goto loop3
     
172. 
     
173. }
     
174. void main()
     
175. {       
     
176. initialize_LCD();
     
177. write_LCD_command(0X80);
     
178.     LCD_showstring(0,0,"hello");
     
179. while(1)
     
180. {
     
181.   P0 = 0XFF;
     
182. if(k1 == 0)   H_scroll_display();
     
183. if(k2 == 0)        show_all_chars();
     
184. if(k3 == 0)          display_chars();  
     
185. }
     
186. 
     
187. }

复制代码

---

作者: 903749285    时间: 2019-4-4 20:08
亲，没有注释，

---

作者: DAFAWW    时间: 2019-6-25 09:17
为什么p0口传输数据地址，怎么还将他设置成按键控制，有点蒙

---

欢迎光临 (http://www.51hei.com/bbs/)

Powered by Discuz! X3.1