pcDuino连结16 x 2 LCD屏 Shield

http://player.youku.com/player.php/sid/XNTIzNjE2NjA4/v.swf

1. #include "core.h"
   
2. 
   
3. #define RS 8
   
4. #define EN 9
   
5. #define backlight 10
   
6. #define RS_L digitalWrite(RS,LOW)
   
7. #define RS_H digitalWrite(RS,HIGH)
   
8. #define EN_L digitalWrite(EN,LOW)
   
9. #define EN_H digitalWrite(EN,HIGH)
   
10. int DB[] = {7,6,5,4};
    
11. /********************************************************************/
    
12. void write_command(int command)
    
13. {
    
14. int i,temp;
    
15. RS_L;
    
16. EN_L;
    
17. temp=command & 0xf0;
    
18. for (i=0; i < 4; i++)
    
19. {
    
20. if(temp&0x80)
    
21. digitalWrite(DB[i],HIGH);
    
22. else digitalWrite(DB[i],LOW);
    
23. temp <<= 1;
    
24. }
    
25. EN_H;
    
26. delayMicroseconds(1);
    
27. EN_L;
    
28. temp=(command & 0x0f)<<4;
    
29. for (i=0; i < 4; i++)
    
30. {
    
31. if(temp&0x80)
    
32. digitalWrite(DB[i],HIGH);
    
33. else digitalWrite(DB[i],LOW);
    
34. temp <<= 1;
    
35. }
    
36. EN_H;
    
37. delayMicroseconds(1);
    
38. EN_L;
    
39. }
    
40. 
    
41. /********************************************************************/
    
42. void write_data(int dat)
    
43. {
    
44. int i=0,temp;
    
45. RS_H;
    
46. EN_L;
    
47. temp=dat & 0xf0;
    
48. for (i=0; i < 4; i++)
    
49. {
    
50. if(temp&0x80)
    
51. digitalWrite(DB[i],HIGH);
    
52. else digitalWrite(DB[i],LOW);
    
53. temp <<= 1;
    
54. }
    
55. EN_H;
    
56. delayMicroseconds(1);
    
57. EN_L;
    
58. temp=(dat & 0x0f)<<4;
    
59. for (i=0; i < 4; i++)
    
60. {
    
61. if(temp&0x80)
    
62. digitalWrite(DB[i],HIGH);
    
63. else digitalWrite(DB[i],LOW);
    
64. temp <<= 1;
    
65. 
    
66. }
    
67. EN_H;
    
68. delayMicroseconds(1);
    
69. EN_L;
    
70. }
    
71. /********************************************************************/
    
72. void LCD_write_char( int x,int y,int dat)
    
73. {
    
74. int address;
    
75. if (x ==0) address = 0x80 + y;
    
76. else address = 0xC0 + y;
    
77. write_command(address);
    
78. write_data(dat);
    
79. delayMicroseconds(10);
    
80. }
    
81. /********************************************************************/
    
82. void lcd1602_init()
    
83. {
    
84. int i = 0;
    
85. pinMode(RS,OUTPUT);
    
86. pinMode(EN,OUTPUT);
    
87. pinMode(backlight,OUTPUT);
    
88. digitalWrite(backlight,HIGH);
    
89. for (i=0; i < 4; i++)
    
90. {
    
91. pinMode(DB[i],OUTPUT);
    
92. }
    
93. delay(100);
    
94. write_command(0x28);
    
95. delay(50);
    
96. write_command(0x06);
    
97. delay(50);
    
98. write_command(0x0c);
    
99. delay(50);
    
100. write_command(0x80);
     
101. delay(50);
     
102. write_command(0x01);
     
103. delay(100);
     
104. }
     
105. /********************************************************************/
     
106. void setup (void)
     
107. {
     
108. lcd1602_init();
     
109. }
     
110. /********************************************************************/
     
111. void loop (void)
     
112. {
     
113. write_command(0x02);
     
114. delay(10);
     
115. LCD_write_char(0,2,'W');
     
116. LCD_write_char(0,3,'e');
     
117. LCD_write_char(0,4,'l');
     
118. LCD_write_char(0,5,'c');
     
119. LCD_write_char(0,6,'o');
     
120. LCD_write_char(0,7,'m');
     
121. LCD_write_char(0,8,'e');
     
122. 
     
123. LCD_write_char(0,10,'t');
     
124. LCD_write_char(0,11,'o');
     
125. 
     
126. LCD_write_char(1,4,'p');
     
127. LCD_write_char(1,5,'c');
     
128. LCD_write_char(1,6,'D');
     
129. LCD_write_char(1,7,'u');
     
130. LCD_write_char(1,8,'i');
     
131. LCD_write_char(1,9,'n');
     
132. LCD_write_char(1,10,'o');
     
133. while(1);
     
134. }

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请问楼主这块1602LCD Keypad怎么和树莓派相连

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