5.3-3.c

单片机应用开发实例.rar

#define Uchar unsigned char
   #define Uint unsigned int
                                                   // 控制管脚定义
//不同的连接必须修改的部分
   sbit RS=P3^0;
   sbit RW=P3^1;
   sbit Elcm=P3^2; 
   #define DataPort P1                             // 数据端口
   #define Busy  0x80
   code char exampl[]="xiao kai good";
   void Delay400Ms(void);
   void Delay5Ms(void);
   void WaitForEnable( void );
   void LcdWriteData( char dataW );
   void LcdWriteCommand( Uchar CMD,Uchar AttribC );
   void LcdReset( void );
   void Display( Uchar dd );
   void DispOneChar(Uchar x,Uchar y,Uchar Wdata);
   void ePutstr(Uchar x,Uchar y, Uchar code *ptr);
                                                    //测试主程序
   void main(void)
  {
      Uchar temp;
      Delay400Ms();
    LcdReset();
    temp = 32;
    DispOneChar(0,0,0x41);
    DispOneChar(0,1,0x41);
    Delay400Ms();
    Delay400Ms();
    Delay400Ms();
    Delay400Ms();
    Delay400Ms();
    Delay400Ms();
    Delay400Ms();
    Delay400Ms();

    while(1)
    {
        temp &= 0x7f;                                 //只显示ASCII字符
        if (temp<32)temp=32;                     //屏蔽控制字符，不予显示
                                                 //Display( temp++ );
        Delay400Ms();
    }
}
void ePutstr(Uchar x,Uchar y, Uchar code *ptr)   //显示字符串
{
Uchar i,l=0;
    while (ptr[l] >31){l++;};
    for (i=0;I
        DispOneChar(x++,y,ptr[i]);
        if ( x == 16 )
{
            x = 0; y ^= 1;
        }
    )
   }
void Display( Uchar dd )                      //演示一行连续字符串  
{                                             //配合上位程序演示移动字符串
Uchar i;
    for (i=0;i<16;i++) 
{
        DispOneChar(i,1,dd++);
        dd &= 0x7f;
        if (dd<32) dd=32;
    }
}
void Disp_XY( char posx,char posy)            // 显示光标定位
{
Uchar temp;
    temp = posx & 0xf;
    posy &= 0x1;
    if ( posy )temp |= 0x40;
    temp |= 0x80;
    LcdWriteCommand(temp,0);
}
     void DispOneChar(Uchar x,Uchar y,Uchar Wdata) 
{                                              // 按指定位置显示出一个字符
    Disp_XY( x, y );                           // 定位显示地址
    LcdWriteData( Wdata );                     // 写字符
}
   void LcdReset( void )                       //初始化程序
{
       LcdWriteCommand( 0x38, 0);              //显示模式设置
        Delay5Ms();
    LcdWriteCommand( 0x38, 0);          
        Delay5Ms();
    LcdWriteCommand( 0x38, 0);
        Delay5Ms();
    LcdWriteCommand( 0x38, 1);             //显示模式设置
    LcdWriteCommand( 0x08, 1);             //显示关闭
    LcdWriteCommand( 0x01, 1);             //显示清屏
    LcdWriteCommand( 0x06, 1);             //显示光标移动设置
    LcdWriteCommand( 0x0c, 1);             //显示开及光标设置
}
void LcdWriteCommand( Uchar CMD,Uchar AttribC )
 {                                         //写控制字符子程序: E=1 RS=0 RW=0
    if (AttribC) WaitForEnable();          //检测忙信号
    RS = 0;
  RW = 0; 
    DataPort = CMD; 
 Elcm = 1;                            //送控制字子程序
Elcm = 0;                           //操作允许脉冲信号
}
void LcdWriteData( char dataW )           //当前位置写字符子程序: E =1 RS=1
{                                         //RW=0
    WaitForEnable();
     RS = 1;                              //检测忙信号
RW = 0;               
    DataPort = dataW;
   Elcm = 1; 
Elcm = 0;                            //操作允许脉冲信号
 }
void WaitForEnable( void ) 
{                                        //正常读写操作之前必须检测LCD
//控制器状态

DataPort = 0xff;                   
RS =0;
 RW = 1;
 Elcm = 1; 
    while( DataPort & Busy );
    Elcm = 0;
  }
   void Delay5ms(void)                    //短延时
  {
    Uint i = 5552;
    while(i--);
   }
   void Delay400ms(void)                 //长延时
   { 
    Uchar i = 5;
    Uint j;
    while(i--)
    {
        j=7269;
        while(j--);
    };
  }