2018年01月10日 | 12864显示屏4*4键盘实验

12864显示屏4*4键盘实验输出结果：获得键值通过发光二极管显示             
#include  

unsigned char code IC_DAT[];

sbit RS=P3^6;     //RS="H",表示DB7--DB0为显示数据, 
                  //RS="L",表示DB7--DB0为显示指令数据 

sbit WRD = P2^5;  //R/W="H",E="H",数据被读到DB7--DB0 
                   //R/W="L",E="H→L", DB7--DB0的数据被写到IR或DR 

sbit E = P2^6;    //使能信号 

sbit PSB = P2^3;  //H:并口方式 L:串口方式 


void    TransferData(char data1,bit DI); //传送数据或者地址命令(data), 
                                         //当DI=0是,传送命令,当DI=1,传送数据. 
void    display(void); 
void    display_grapic(void); 

void    delay1(unsigned int t); 
void    delay(unsigned int m); 
void    delayms(unsigned int n); 

void    DisplayLine(unsigned char line1,unsigned char line2); 
void    DisplayGraphic(unsigned char code *adder); 

void    LCD_mesg(unsigned char code *adder1); 
Key_return(char keyvalue); 
keysCAN(); 
/***************屏幕显示结果*********************/ 
unsigned char code IC_DAT[]={ 
"天华杯老师培训班" 
"******    ******" 
"    按键键值    " 
"地点：35号楼 505" 
}; 
unsigned char data1[]={"0123456789ABCDEF "}; 
/***************LCD字库初始化程序*********************/ 
void initinal(void)          
          { 
           delay(40);               //大于40MS的延时程序 
           PSB=1;                   //设置为8BIT并口工作模式 
           delay(1);                //延时 
          // RES=0;                 //复位 
          // delay(1);              //延时 
          // RES=1;                 //复位置高 
           delay(10); 
           TransferData(0x30,0);  //Extended Function Set :8BIT设置,RE=0: basic instruction set, G=0 :graphic display OFF 
           delay(100);            //大于100uS的延时程序 
           TransferData(0x30,0);  //Function Set 
           delay(37);             ////大于37uS的延时程序 
           TransferData(0x08,0);  //Display on Control 
           delay(100);            //大于100uS的延时程序 
           TransferData(0x10,0);  //Cursor Display Control光标设置 
           delay(100);            //大于100uS的延时程序 
           TransferData(0x0C,0);  //Display Control,D=1,显示开 
           delay(100);            //大于100uS的延时程序 
           TransferData(0x01,0);  //Display Clear    清屏 
           delay(10);             //大于10mS的延时程序 
           TransferData(0x06,0);  //Enry Mode Set,光标从右向左加1位移动 
           delay(100);            //大于100uS的延时程序 
          } 


//*************显示函数****************************** 

void lcd_mesg(unsigned char code *adder1) 
{ 
    unsigned char i; 
        TransferData(0x80,0);    //Set Graphic Display RAM Address 传地址指令 
        delay(100); 
    for(i=0;i<32;i++) 
        { 
              TransferData(*adder1,1); 
               adder1++; 
        } 

        TransferData(0x90,0);    //Set Graphic Display RAM Address 
        delay(100); 

    for(i=0;i<32;i++) 
        { 
              TransferData(*adder1,1); 
               adder1++; 
        } 
} 
//*************位置显示函数****************************** 
void lcd_wxs1(unsigned int adder2) 
{ 
        TransferData(0x8C,0);    //Set Graphic Display RAM Address 传地址指令 
        delay(100);     
          TransferData(adder2,1); 
        TransferData(data1[16],1); 
} 
/***************键盘扫描子程序*************/ 
keyscan()   
{     
    char sCCode,recode,tcode,i,keyvalue,temp; 
    P1=0xf0;  //发全“0”行扫描，列线输入 
    if((P1&0xf0)!=0xf0) //有键按下 
        {  
            delay1(10);   //延时去抖动 
            tcode=0x01; 
           if((P1&0xf0)!=0xf0) 
                { 
                    for(i=0;i<4;i++) 
                      { 
                        sccode=~tcode;  //扫描初始值 
                       P1=sccode;     //输出行扫描码 
                       if((P1&0XF0)!=0XF0)  //本行有键按下 
                            { 
                              recode=P1&0xf0; 
                              //recode=recode>>4; 
                              recode=recode+0x0f; 
                              temp=((~sccode)+(~recode)); 
                              keyvalue=Key_return(temp);  //返回特征码 
                              return keyvalue; 
                            } 
                         else 
                        tcode=tcode<<1;  //行扫描码左移一位 
                         } 
                } 

            } 
    else 
    return keyvalue;  //无键按下，返回0 
} 

/***************查键值子程序*************/ 
Key_return(char keyvalue) 
{ 
    unsigned int Key_num; 
  //keyword=keyvalue; 
     switch(keyvalue) 
           { 
           case(0x11): 
                      { 
                      Key_num=0x00; 
                      }break; 
           case(0x12): 
                      { 
                      Key_num=0x04; 
                      }break; 
           case(0x14): 
                      { 
                      Key_num=0x08; 
                      }break; 
           case(0x18): 
                      { 
                      Key_num=0x0c; 
                      }break; 
           case(0x21): 
                      { 
                      Key_num=0x01; 
                      }break; 
           case(0x22): 
                      { 
                      Key_num=0x05; 
                      }break; 
           case(0x24): 
                      { 
                      Key_num=0x09; 
                      }break; 
           case(0x28): 
                      { 
                      Key_num=0x0d; 
                      }break; 
           case(0x41): 
                      { 
                      Key_num=0x02; 
                      }break; 
           case(0x42): 
                      { 
                      Key_num=0x06; 
                      }break; 
           case(0x44): 
                      { 
                      Key_num=0x0a; 
                      }break; 
           case(0x48): 
                      { 
                      Key_num=0x0e; 
                      }break; 
           case(0x81): 
                      { 
                      Key_num=0x03; 
                      }break; 
           case(0x82): 
                       { 
                       Key_num=0x07; 
                       }break; 
           case(0x84): 
                       { 
                       Key_num=0x0b; 
                       }break; 
           case(0x88): 
                      { 
                      Key_num=0x0f; 
                      }break; 
           default:break; 
           } 
           return Key_num; 
} 

//********写命令/数据******************************* 

void    TransferData(char data1,bit DI)  //传送数据或者命令,当DI=0是,传送命令, 
          {                                 //当DI=1,传送数据. 
            WRD=0;    //R/W="H",E="H",数据被读到DB7--DB0,R/W="L",E="H→L", DB7--DB0的数据被写到IR或DR 
            RS=DI;    //RS="H",表示DB7--DB0为显示数据, RS="L",表示DB7--DB0为显示指令数据 
            delay(1); 
            P0=data1; 
            E=1; 
            delay(1); 
            E=0; 
           } 
//************延　时******************************************* 
void  delayms(unsigned int n)            //延时10×n毫秒程序 
                   { 
                      unsigned int i,j; 
                      for(i=0;i                         for(j=0;j<2000;j++); 
                   } 

void  delay(unsigned int m)              //延时程序 
                   { 
                      unsigned int i,j; 
                      for(i=0;i                         for(j=0;j<10;j++); 
                   } 

void delay1(unsigned int t) 
{ 
unsigned int i; 
for(i=0;i//for(j=0;j<10;j++) 
; 
} 
//************主函数************************************** 
void main(void) 
     { 
     unsigned int e;  
     initinal(); //调用LCD字库初始化程序  
     delay(10);            //大于100uS的延时程序 
     lcd_mesg(IC_DAT);      //显示中文汉字1     
         while(1) 
        { 
          e=keyscan();   //键盘扫描值 
          lcd_wxs1(data1[e]); 
        } 
      } 

//************结　束******************************************