SMC1602A(16*2)模拟口线接线方式

     连接线图:

     ---------------------------------------------------

     |LCM-----51 | LCM-----51 | LCM------51 |

     --------------------------------------------------|

     |DB0-----P1.0 | DB4-----P1.4 | RW-------P2.0 |

     |DB1-----P1.1 | DB5-----P1.5 | RS-------P2.1 |

     |DB2-----P1.2 | DB6-----P1.6 | E--------P2.2 |

     |DB3-----P1.3 | DB7-----P1.7 | VLCD接1K电阻到GND|

     ---------------------------------------------------Keyboard接线

     PS/2--------51

     1 DATA------P3.4

     3 GND

     4 VCC

     5 CLK-------P3.3 接在51的外部中断，触发方式为低电平本程序源码只供学习参考，不得应用于商业用途，如有需要请联系作者。[注:AT89x51使用12M或11.0592M晶振,实测使用11.0592M]

     [Keil uV2 7.01编译运行通过 程序中没有做键盘数据的奇偶校验]=============================================================*/

     #include

     #include "scancodes.h"#define LCM_RW P2_0 //定义LCD引脚

     #define LCM_RS P2_1

     #define LCM_E P2_2

     #define LCM_Data P1#define Key_Data P3_4 //定义Keyboard引脚

     #define Key_CLK P3_3#define Busy 0x80 //用于检测LCM状态字中的Busy标识void LCMInit(void);

     void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);

     void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);

     void Delay5Ms(void);

     void Delay400Ms(void);

     void Decode(unsigned char ScanCode);

     void WriteDataLCM(unsigned char WDLCM);

     void WriteCommandLCM(unsigned char WCLCM,BuysC);unsigned char ReadDataLCM(void);

     unsigned char ReadStatusLCM(void);

     unsigned char code cdle_net[] = {"www.cdle.net--"};

     unsigned char code email[] = {"pnzwzw@cdle.net"};

     unsigned char code Cls[] = {" "};

     static unsigned char IntNum = 0; //中断次数计数

     static unsigned char KeyV; //键值

     static unsigned char DisNum = 0; //显示用指针

     static unsigned char Key_UP=0, Shift = 0;//Key_UP是键松开标识，Shift是Shift键按下标识

     static unsigned char BF = 0; //标识是否有字符被收到void main(void)

     {

     unsigned char TempCyc; Delay400Ms(); //启动等待，等LCM讲入工作状态

     LCMInit(); //LCM初始化

     Delay5Ms(); //延时片刻(可不要) DisplayListChar(0, 0, cdle_net);

     DisplayListChar(0, 1, email);

     ReadDataLCM();//测试用句无意义

     for (TempCyc=0; TempCyc0x19) //若到达字串尾则退出

     {

     if (X 0) && (IntNum > 1; //因键盘数据是低>>高，结合上一句所以右移一位

     if (Key_Data) KeyV = KeyV | 0x80; //当键盘数据线为1时为1到最高位

     }

     IntNum++;

     while (!Key_CLK); //等待PS/2CLK拉高 if (IntNum > 10)

     {

     IntNum = 0; //当中断10次后表示一帧数据收完，清变量准备下一次接收

     BF = 1; //标识有字符输入完了

     EA = 0; //关中断等显示完后再开中断 (注：如这里不用BF和关中断直接调Decode()则所Decode中所调用的所有函数要声明为再入函数)

     }

     }void Decode(unsigned char ScanCode) //注意:如SHIFT+G为12H 34H F0H 34H F0H 12H，也就是说shift的通码+G的通码+shift的断码+G的断码

     {

     unsigned char TempCyc; if (!Key_UP) //当键盘松开时

     {

     switch (ScanCode)

     {

     case 0xF0 : // 当收到0xF0，Key_UP置1表示断码开始

     Key_UP = 1;

     break; case 0x12 : // 左 SHIFT

     Shift = 1;

     break; case 0x59 : // 右 SHIFT

     Shift = 1;

     break; default:

     if (DisNum > 15)

     {

     DisplayListChar(0, 1, Cls);//清LCD第二行

     DisNum = 0;

     }

     if(!Shift) //如果SHIFT没按下

     {

     for (TempCyc = 0;(UnShifted[TempCyc][0]!=ScanCode)&&(TempCyc<59); TempCyc++); //查表显示

     if (UnShifted[TempCyc][0] == ScanCode) DisplayOneChar(DisNum, 1, UnShifted[TempCyc][1]);

     DisNum++;

     }

     else //按下SHIFT

     {

     for(TempCyc = 0; (Shifted[TempCyc][0]!=ScanCode)&&(TempCyc<59); TempCyc++); //查表显示

     if (Shifted[TempCyc][0] == ScanCode) DisplayOneChar(DisNum, 1, Shifted[TempCyc][1]);

     DisNum++;

     } break;

     }

     }

     else

     {

     Key_UP = 0;

     switch (ScanCode) //当键松开时不处理判码，如G 34H F0H 34H 那么第二个34H不会被处理

     {

     case 0x12 : // 左 SHIFT

     Shift = 0;

     break; case 0x59 : // 右 SHIFT

     Shift = 0;

     break;

     }

     }

     BF = 0; //标识字符处理完了

     }

     scancodes.h

     unsigned char code UnShifted[59][2] = {

     0x1C, 'a',

     0x32, 'b',

     0x21, 'c',

     0x23, 'd',

     0x24, 'e',

     0x2B, 'f',

     0x34, 'g',

     0x33, 'h',

     0x43, 'i',

     0x3B, 'j',

     0x42, 'k',

     0x4B, 'l',

     0x3A, 'm',

     0x31, 'n',

     0x44, 'o',

     0x4D, 'p',

     0x15, 'q',

     0x2D, 'r',

     0x1B, 's',

     0x2C, 't',

     0x3C, 'u',

     0x2A, 'v',

     0x1D, 'w',

     0x22, 'x',

     0x35, 'y',

     0x1A, 'z',

     0x45, '0',

     0x16, '1',

     0x1E, '2',

     0x26, '3',

     0x25, '4',

     0x2E, '5',

     0x36, '6',

     0x3D, '7',

     0x3E, '8',

     0x46, '9',

     0x0E, '`',

     0x4E, '-',

     0x55, '=',

     0x5D, '\\',

     0x29, ' ',

     0x54, '[',

     0x5B, ']',

     0x4C, ';',

     0x52, '\'',

     0x41, ',',

     0x49, '.',

     0x4A, '/',

     0x71, '.',

     0x70, '0',

     0x69, '1',

     0x72, '2',

     0x7A, '3',

     0x6B, '4',

     0x73, '5',

     0x74, '6',

     0x6C, '7',

     0x75, '8',

     0x7D, '9',

     };unsigned char code Shifted[59][2] = {

     0x1C, 'A',

     0x32, 'B',

     0x21, 'C',

     0x23, 'D',

     0x24, 'E',

     0x2B, 'F',

     0x34, 'G',

     0x33, 'H',

     0x43, 'I',

     0x3B, 'J',

     0x42, 'K',

     0x4B, 'L',

     0x3A, 'M',

     0x31, 'N',

     0x44, 'O',

     0x4D, 'P',

     0x15, 'Q',

     0x2D, 'R',

     0x1B, 'S',

     0x2C, 'T',

     0x3C, 'U',

     0x2A, 'V',

     0x1D, 'W',

     0x22, 'X',

     0x35, 'Y',

     0x1A, 'Z',

     0x45, '0',

     0x16, '1',

     0x1E, '2',

     0x26, '3',

     0x25, '4',

     0x2E, '5',

     0x36, '6',

     0x3D, '7',

     0x3E, '8',

     0x46, '9',

     0x0E, '~',

     0x4E, '_',

     0x55, '+',

     0x5D, '|',

     0x29, ' ',

     0x54, '{',

     0x5B, '}',

     0x4C, ':',

     0x52, '"',

     0x41, '',

     0x4A, '?',

     0x71, '.',

     0x70, '0',

     0x69, '1',

     0x72, '2',

     0x7A, '3',

     0x6B, '4',

     0x73, '5',

     0x74, '6',

     0x6C, '7',

     0x75, '8',

     0x7D, '9',

     };

     ----------------------------

     来源：不详

     作者：不详