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标题:用51单片机+LCD12864屏编写的“ID卡号读/写器”
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用51单片机+LCD12864屏编写的“ID卡号读/写器”
#include <reg52.h>                                    //包含头文件
#define uchar unsigned char                            //宏定义
#define uint unsigned int                            //宏定义
#define LCD_data  P0                                 //数据口
sbit int0=P3^0;                                        //串口读入
sbit gd  =  P1^3;             //置P1^3端口为高/低电平的转换开关 ,即读/写转换开关
sbit LCD_RS  =  P1^0;            //数据/地址寄存器选择输入 ,lcd为12864
sbit LCD_RW  =  P1^1;            //液晶读/写控制
sbit LCD_EN  =  P1^2;            //液晶使能控制
sbit LCD_gd  =  P1^3;             //置P1^3端口为高/低电平的转换开关 ,即读/写转换开关
sbit LCD_PSB =  P2^7;            //串/并方式控制
sbit LCD_RST  =  P2^6;              //    lcd复位端
uint flag ,i;                            //串口中断标志位        
char a[9];                            //字符数组a,a[9]为系统自动增设的终结符(\0)
void init();                         //

/*******************************************************************/
/*                                                                 */
/* z毫秒延时函数                                                  */
/*                                                                 */
/*******************************************************************/
void delay(uint z)
    {
       uint x,y;
        for(x=z;x>0;x--)
            for(y=110;y>0;y--);   
    }        

/*******************************************************************/
/*                                                                 */
/*  50微秒延时函数                                                 */
/*                                                                 */
/*******************************************************************/
void delay_50us    (uchar t)
    {
       uchar j;
        for(;t>0;t--)
            for(j=19;j>0;j--);   
    }   
 
/*******************************************************************/
/*                                                                 */
/*检查LCD忙状态                                                    */
/*lcd_busy为1时,忙,等待。lcd-busy为0时,闲,可写指令与数据。      */
/*                                                                 */
/*******************************************************************/
bit lcd_busy()
     {                          
        bit result;
        LCD_RS = 0;
        LCD_RW = 1;
        LCD_EN = 1;
        delay_50us(1);
        result = (bit)(P0&0x80);
        LCD_EN = 0;
        return(result);
     }         
/*******************************************************************/
/*                                                                 */
/*写指令数据到LCD                                                  */
/*RS=L,RW=L,E=高脉冲,D0-D7=指令码。                             */
/*                                                                 */
/*******************************************************************/
void lcd_wcmd(uchar cmd)
    {                          
        while(lcd_busy());
        LCD_RS = 0;
        LCD_RW = 0;
        LCD_EN = 0;
           delay_50us(2);
        P0 = cmd;
        LCD_EN = 1;//下降沿写入
        delay_50us(8);
        LCD_EN = 0;
        delay_50us(2);
     }
/*******************************************************************/
/*                                                                 */
/*写显示数据到LCD                                                  */
/*RS=H,RW=L,E=高脉冲,D0-D7=数据。                               */
/*   //显示字符                                                    */
/*******************************************************************/
void lcd_wdat(uchar dat)
    {                          
        while(lcd_busy());
        LCD_RS = 1;
        LCD_RW = 0;
        LCD_EN = 0;
           delay_50us(1);
        P0 = dat;
        LCD_EN = 1;//下降沿写入
        delay_50us(10);
        LCD_EN = 0;
        delay_50us(2);
    }


    /*********************************************************/
/*                                                       */
/* 设定显示位置                                          */
/*                                                       */
/*********************************************************/
void lcd_pos(uchar X,uchar Y)                //显示地址
    {                          
       uchar  pos;
       if (X==0)
         {X=0x80;}
       else if (X==1)
         {X=0x90;}
       else if (X==2)
         {X=0x88;}
       else if (X==3)
         {X=0x98;}
       pos = X+Y ;  
       lcd_wcmd(pos);     //显示地址
    }

/*******************************************************************/
/*                                                                 */
/*  LCD初始化设定                                                  */
/*                                                                 */
/*******************************************************************/
void lcd_init()                      //lcd初始化
    {
        LCD_PSB = 1;         //并口方式
        LCD_EN=0;
        LCD_RST=0;             //复位
        delay(5);
        LCD_RST=1;             //复位恢复
        lcd_wcmd(0x34);      //扩充指令操作
        delay(5);
        lcd_wcmd(0x30);      //基本指令操作
        delay(5);
        lcd_wcmd(0x0C);      //显示开,关光标
     }
        
  /****************串行口字节发送****************/
void UART_SendOneByte(uchar c)
{
    SBUF = c;
    while(!TI);              //若TI=0,在此等待
    TI = 0;
         
}
/****************串行口字符发送****************/
void SendStr(uchar *s)
{
 while(*s!='\0')         //通过检测是否字符串末尾
  {
  UART_SendOneByte(*s);
  s++;
  }
}

/****************串行口字节接收****************/
uchar UART_ReceiveOneByte()
{
    uint b;               //定义无符号型变量b
    b = SBUF;
    while(!RI);       //若RI=0,在此等待
    RI = 0;   
    return b;
}

/****************串行口数据字符接收****************/
void ReceiveStr()
{
    uint b;                 //定义无符号型变量b
    uint bi = 0;                   //初始化为零
    while(b!='\0')    //通过检测是否字符串末尾
      {
          b = UART_ReceiveOneByte();
          a[bi] = b;                                   
          bi++;                      //接受的数据存放于数组 a[] 中                              
      }
}
  void main()
    {   
        init();                                          //调用串口初始化子函数
        while(1)
            {   
                 if(flag==1)                                    //若串口中断标志位打开
                    {
                        flag=0;                                //清除flag标志位 (即关闭串口中断标志位)
                        ES=0;                                //关串口中断

                        lcd_wcmd(0x01);              //清除LCD的显示内容
                        delay(5);
                        i=0;                        // i清零
                        lcd_pos(0,0);               //设置显示位置为第一行的第1个字符
                        while(a[i]!= '\0')
                            {
                                lcd_wdat(a[i]);
                                i++    ;
                            }
                    }                                    
            }   
    }
  
void ser() interrupt 4                                //串口中断程序
    {
        ES=0;                                        //关串口中断
        RI=0;                                        //清零串口接收标志位,即允许串口接收
        if(gd ==1)                                 //等于1时,为读的状态
                    {
                                
                        SendStr("\nR3,0,2\r");      //发送:<LF> R3,0,2<CR>      R3:读取USER空间,0:0地址位开始读取,2:数据长度2   
                        delay(150);
                        ReceiveStr();             //    读取数据暂存于a中   
                        flag=1;                                        //开串口中断标志位
                           ES=1;                                        //开串口中断        
                    }
             else                                               //若gd =0 为写的状态
                     {
                        SendStr("\nW3,0,2,246813EF\r");         //发送:<LF> W1,0,2<CR>      W3:写入USER空间,0:0地址位开始写入,2:数据长度2   
                        delay(150);
                         delay(150);
                        SendStr("\nR3,0,2\r");
                        delay(150);
                        ReceiveStr();  //该返回信息暂存于a中
                        lcd_wcmd(0x01);              //清除LCD的显示内容
                        delay(5);
                        i=0;                        // i清零
                        lcd_pos(0,0);               //设置显示位置为第一行的第1个字符
                        while(a[i]!= '\0')
                            {
                                lcd_wdat(a[i]);
                                i++    ;
                            }
                        while(1);            //程序处于死机状态
                    }
              
    }
void init()                                             //单片机初始化                                                         
    {
             TMOD = 0x20;                                   // 定时器T1工作于8位自动重载模式, 用于产生波特率
        TH1 = 0xfd;                                 // 波特率9600
        TL1 = 0xfd;                                    // 波特率9600
        TR1 = 1;                                     // 启动定时器T1
        SCON = 0x50;                                // 设定串行口工作方式1,(SM0=0;SM1=1)及REN=1
        EA=1;                                        //开总中断
        ES=1;                                        //开串口中断
    }      
问题如下:
Build target 'Target 1'
compiling ID卡号读写-3.c...
ID卡号读写-3.C(1): warning C500: LICENSE ERROR (R208: RENEW LICENSE ID CODE (LIC))
linking...
*** WARNING L16: UNCALLED SEGMENT, IGNORED FOR OVERLAY PROCESS
    SEGMENT: ?PR?LCD_INIT?ID卡号读写_3
*** WARNING L15: MULTIPLE CALL TO SEGMENT
    SEGMENT: ?PR?LCD_BUSY?ID卡号读写_3
    CALLER1: ?PR?SER?ID卡号读写_3
    CALLER2: ?C_C51STARTUP
Program Size: data=22.2 xdata=0 code=578
"ID卡号读写-3" - 0 Error(s), 3 Warning(s).
搜索更多相关主题的帖子: 数据 串口 中断 void while 
2018-12-12 10:50
快速回复:用51单片机+LCD12864屏编写的“ID卡号读/写器”
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