将DHCP获取的网络IP地址打印显示到LCD

xhhuang

想将DHCP获取的地址打印到LCD，不知道怎么处理。

下面是参照 cd 1602 接线参照弘毅的教程 ，接线打印显示LCD，均没有问题。不过一旦上加DHCP获取IP地址，LCD就无法显示了，谁有这方面的经验，跪谢！！

1. int LCD1602_RS=12;   
   
2. int LCD1602_RW=11;   
   
3. int LCD1602_EN=10;   
   
4. int DB[] = { 6, 7, 8, 9};
   
5. char str1[]="Welcome to";
   
6. char str2[]="geek-workshop";
   
7. char str3[]="this is the";
   
8. char str4[]="4-bit interface";
   
9. 
   
10. void LCD_Command_Write(int command)
    
11. {
    
12. int i,temp;
    
13. digitalWrite( LCD1602_RS,LOW);
    
14. digitalWrite( LCD1602_RW,LOW);
    
15. digitalWrite( LCD1602_EN,LOW);
    
16. 
    
17. temp=command & 0xf0;
    
18. for (i=DB[0]; i <= 9; i++)
    
19. {
    
20.    digitalWrite(i,temp & 0x80);
    
21.    temp <<= 1;
    
22. }
    
23. 
    
24. digitalWrite( LCD1602_EN,HIGH);
    
25. delayMicroseconds(1);
    
26. digitalWrite( LCD1602_EN,LOW);
    
27. 
    
28. temp=(command & 0x0f)<<4;
    
29. for (i=DB[0]; i <= 9; i++)
    
30. {
    
31.    digitalWrite(i,temp & 0x80);
    
32.    temp <<= 1;
    
33. }
    
34. 
    
35. digitalWrite( LCD1602_EN,HIGH);
    
36. delayMicroseconds(1);
    
37. digitalWrite( LCD1602_EN,LOW);
    
38. }
    
39. 
    
40. void LCD_Data_Write(int dat)
    
41. {
    
42. int i=0,temp;
    
43. digitalWrite( LCD1602_RS,HIGH);
    
44. digitalWrite( LCD1602_RW,LOW);
    
45. digitalWrite( LCD1602_EN,LOW);
    
46. 
    
47. temp=dat & 0xf0;
    
48. for (i=DB[0]; i <= 9; i++)
    
49. {
    
50.    digitalWrite(i,temp & 0x80);
    
51.    temp <<= 1;
    
52. }
    
53. 
    
54. digitalWrite( LCD1602_EN,HIGH);
    
55. delayMicroseconds(1);
    
56. digitalWrite( LCD1602_EN,LOW);
    
57. 
    
58. temp=(dat & 0x0f)<<4;
    
59. for (i=DB[0]; i <= 9; i++)
    
60. {
    
61.    digitalWrite(i,temp & 0x80);
    
62.    temp <<= 1;
    
63. }
    
64. 
    
65. digitalWrite( LCD1602_EN,HIGH);
    
66. delayMicroseconds(1);
    
67. digitalWrite( LCD1602_EN,LOW);
    
68. }
    
69. 
    
70. void LCD_SET_XY( int x, int y )
    
71. {
    
72.   int address;
    
73.   if (y ==0)    address = 0x80 + x;
    
74.   else          address = 0xC0 + x;
    
75.   LCD_Command_Write(address);
    
76. }
    
77. 
    
78. void LCD_Write_Char( int x,int y,int dat)
    
79. {
    
80.   LCD_SET_XY( x, y );
    
81.   LCD_Data_Write(dat);
    
82. }
    
83. 
    
84. void LCD_Write_String(int X,int Y,char *s)
    
85. {
    
86.     LCD_SET_XY( X, Y );    //设置地址
    
87.     while (*s)             //写字符串
    
88.     {
    
89.       LCD_Data_Write(*s);   
    
90.       s ++;
    
91.     }
    
92. }
    
93. 
    
94. void setup (void)
    
95. {
    
96.   int i = 0;
    
97.   for (i=6; i <= 12; i++)
    
98.    {
    
99.      pinMode(i,OUTPUT);
    
100.    }
     
101.   delay(100);
     
102.   LCD_Command_Write(0x28);//4线 2行 5x7
     
103.   delay(50);
     
104.   LCD_Command_Write(0x06);
     
105.   delay(50);
     
106.   LCD_Command_Write(0x0c);
     
107.   delay(50);
     
108.   LCD_Command_Write(0x80);
     
109.   delay(50);
     
110.   LCD_Command_Write(0x01);
     
111.   delay(50);
     
112. 
     
113. }
     
114. 
     
115. void loop (void)
     
116. {
     
117.    LCD_Command_Write(0x01);
     
118.    delay(50);
     
119.    LCD_Write_String(3,0,str1);//第1行，第4个地址起
     
120.    delay(50);
     
121.    LCD_Write_String(1,1,str2);//第2行，第2个地址起
     
122.    delay(5000);
     
123.    LCD_Command_Write(0x01);
     
124.    delay(50);
     
125.    LCD_Write_String(0,0,str3);
     
126.    delay(50);
     
127.    LCD_Write_String(0,1,str4);
     
128.    delay(5000);
     
129. 
     
130. }
     

复制代码

xhhuang

1. #include <SPI.h>
   
2. #include <Ethernet.h>
   
3. 
   
4. int LCD1602_RS=12;   
   
5. int LCD1602_RW=11;   
   
6. int LCD1602_EN=10;   
   
7. int DB[] = { 6, 7, 8, 9};
   
8. char str1[]="Welcome to";
   
9. char str2[]="geek-workshop";
   
10. 
    
11. 
    
12. 
    
13. byte mac[] = {  
    
14.   0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02 };
    
15. 
    
16. // Initialize the Ethernet client library
    
17. // with the IP address and port of the server
    
18. // that you want to connect to (port 80 is default for HTTP):
    
19. EthernetClient client;
    
20. 
    
21. 
    
22. 
    
23. 
    
24. void LCD_Command_Write(int command)
    
25. {
    
26. int i,temp;
    
27. digitalWrite( LCD1602_RS,LOW);
    
28. digitalWrite( LCD1602_RW,LOW);
    
29. digitalWrite( LCD1602_EN,LOW);
    
30. 
    
31. temp=command & 0xf0;
    
32. for (i=DB[0]; i <= 9; i++)
    
33. {
    
34.    digitalWrite(i,temp & 0x80);
    
35.    temp <<= 1;
    
36. }
    
37. 
    
38. digitalWrite( LCD1602_EN,HIGH);
    
39. delayMicroseconds(1);
    
40. digitalWrite( LCD1602_EN,LOW);
    
41. 
    
42. temp=(command & 0x0f)<<4;
    
43. for (i=DB[0]; i <= 9; i++)
    
44. {
    
45.    digitalWrite(i,temp & 0x80);
    
46.    temp <<= 1;
    
47. }
    
48. 
    
49. digitalWrite( LCD1602_EN,HIGH);
    
50. delayMicroseconds(1);
    
51. digitalWrite( LCD1602_EN,LOW);
    
52. }
    
53. 
    
54. void LCD_Data_Write(int dat)
    
55. {
    
56. int i=0,temp;
    
57. digitalWrite( LCD1602_RS,HIGH);
    
58. digitalWrite( LCD1602_RW,LOW);
    
59. digitalWrite( LCD1602_EN,LOW);
    
60. 
    
61. temp=dat & 0xf0;
    
62. for (i=DB[0]; i <= 9; i++)
    
63. {
    
64.    digitalWrite(i,temp & 0x80);
    
65.    temp <<= 1;
    
66. }
    
67. 
    
68. digitalWrite( LCD1602_EN,HIGH);
    
69. delayMicroseconds(1);
    
70. digitalWrite( LCD1602_EN,LOW);
    
71. 
    
72. temp=(dat & 0x0f)<<4;
    
73. for (i=DB[0]; i <= 9; i++)
    
74. {
    
75.    digitalWrite(i,temp & 0x80);
    
76.    temp <<= 1;
    
77. }
    
78. 
    
79. digitalWrite( LCD1602_EN,HIGH);
    
80. delayMicroseconds(1);
    
81. digitalWrite( LCD1602_EN,LOW);
    
82. }
    
83. 
    
84. void LCD_SET_XY( int x, int y )
    
85. {
    
86.   int address;
    
87.   if (y ==0)    address = 0x80 + x;
    
88.   else          address = 0xC0 + x;
    
89.   LCD_Command_Write(address);
    
90. }
    
91. 
    
92. void LCD_Write_Char( int x,int y,int dat)
    
93. {
    
94.   LCD_SET_XY( x, y );
    
95.   LCD_Data_Write(dat);
    
96. }
    
97. 
    
98. void LCD_Write_String(int X,int Y,char *s)
    
99. {
    
100.     LCD_SET_XY( X, Y );    //设置地址
     
101.     while (*s)             //写字符串
     
102.     {
     
103.       LCD_Data_Write(*s);   
     
104.       s ++;
     
105.     }
     
106. }
     
107. 
     
108. void setup (void)
     
109. {
     
110.     Serial.begin(9600);
     
111.     if (Ethernet.begin(mac) == 0) {
     
112.     Serial.println("Failed to configure Ethernet using DHCP");
     
113.     // no point in carrying on, so do nothing forevermore:
     
114.     for(;;)
     
115.       ;
     
116.   }
     
117.   
     
118.      Serial.print("My IP address: ");
     
119.   for (byte thisByte = 0; thisByte < 4; thisByte++) {
     
120.     // print the value of each byte of the IP address:
     
121.     Serial.print(Ethernet.localIP()[thisByte], DEC);
     
122.     Serial.print(".");
     
123.   }
     
124.   Serial.println();
     
125.   
     
126.   
     
127.   int i = 0;
     
128.   for (i=6; i <= 12; i++)
     
129.    {
     
130.      pinMode(i,OUTPUT);
     
131.    }
     
132.   delay(100);
     
133.   LCD_Command_Write(0x28);//4线 2行 5x7
     
134.   delay(50);
     
135.   LCD_Command_Write(0x06);
     
136.   delay(50);
     
137.   LCD_Command_Write(0x0c);
     
138.   delay(50);
     
139.   LCD_Command_Write(0x80);
     
140.   delay(50);
     
141.   LCD_Command_Write(0x01);
     
142.   delay(50);
     
143. 
     
144.   // this check is only needed on the Leonardo:
     
145. 
     
146. 
     
147.   // start the Ethernet connection:
     
148. 
     
149.   // print your local IP address:
     
150. 
     
151. 
     
152. }
     
153. 
     
154. void loop (void)
     
155. {
     
156.    LCD_Command_Write(0x01);
     
157.    delay(50);
     
158.    LCD_Write_String(3,0,str1);//第1行，第4个地址起
     
159.    delay(50);
     
160.    LCD_Write_String(1,1,str2);//第2行，第2个地址起
     
161.    delay(5000);
     
162. 
     
163. }
     

复制代码

这是加了DHCP获取的代码。好像就不太行了，不过DHCP地址能获取到，我能从COM monitor中看到地址。不过老实讲，即使LCD，能显示，我也不知道如何将

Serial.print(Ethernet.localIP()[thisByte], DEC);

转换显示到LCD上。呵呵。。有做过这个吗？

caiwenping

为什么不用LiquidCrystal库呢.....

xhhuang

http://forum.arduino.cc/index.php?topic=110672.0

其有看到这个贴子，也看过官方的接线的图，

左下角的那个可变电阻，因为那块的问题，因为我没有那个东西，就试着用固定的电阻，但LCD就是不亮。也不想用那个东西，太大不方便我整合，
哪个大神能帮我修改一下那个LiquidCrystal接线图， 我是新手多谢了。

弘毅

D13-D10管脚都不要占用，就可以，你这个是1602和网络扩展板管脚冲突了。

xhhuang

嗯，将11,12移动6，7问题就解决了，