基于天祥51單片機 1602液晶密碼鎖程序出現(xiàn)亂碼

ID:907785 · 發(fā)表于 2021-4-20 18:48

想問問論壇里的學長們，我這個鍵盤檢測是不是有一點問題，為什么通過矩陣鍵盤打出來的是亂碼
我這個是郭天祥的板子，鍵盤檢測和液晶初始化，也主要是按他視頻里教學打的
#include<reg52.h>
sbit lcden=P3^4;
sbit lcdrs=P3^5;
sbit dula=P2^6;
sbit wela=P2^7;
#define uint unsigned int
#define uchar unsigned char
uchar code table2[]="MIMA?";
uchar num,temp,num1,num2;
uchar keyscan();
void delay(uint z)
{
      uint x,y;
      for(x=z;x>0;x--)
            for(y=110;y>0;y--);
}

void write_com(uchar com)//命令子函數(shù)
{
      lcdrs=0;//時序
      P0=com;
      delay(5);
      lcden=1;
      delay(5);
      lcden=0;
}

void write_data(uchar date)
{
      lcdrs=1;
      P0=date;
      delay(5);
      lcden=1;
      delay(5);
      lcden=0;
}

void init()//將液晶初始化函數(shù)
{
      dula=0;
      wela=0;
      lcden=0;
      write_com(0x38);
      write_com(0x0f);
      write_com(0x06);
      write_com(0x01);
      write_com(0x80);
}

uchar keyscan(uint num1)//鍵盤檢測
{
      while(1)
      {
               P3=0xfe;
            temp=P3;
            temp=temp&0xf0;
            if(temp!=0xf0)
            {
                     delay(5);
                     temp=P3;
                     temp=temp&0xf0;
                     if(temp!=0xf0)
                     {
                        temp=P3;
                              switch(temp)
                              {
                                    case 0xee:num1=1;
                                    break;
                                    case 0xde:num1=2;
                                    break;
                                    case 0xbe:num1=3;
                                    break;
                                    case 0x7e:num1=4;
                                    break;
                              }
                              while(temp!=0xf0)
                              {
                                    temp=P3;
                                    temp=temp&0xf0;
                              }
                     }
            }

            P3=0xfd;
            temp=P3;
            temp=temp&0xf0;
            if(temp!=0xf0)
            {
                     delay(5);
                     temp=P3;
                     temp=temp&0xf0;
                     if(temp!=0xf0)
                     {
                        temp=P3;
                              switch(temp)
                              {
                                    case 0xed:num1=5;
                                    break;
                                    case 0xdd:num1=6;
                                    break;
                                    case 0xbd:num1=7;
                                    break;
                                    case 0x7d:num1=8;
                                    break;
                              }
                              while(temp!=0xf0)
                              {
                                    temp=P3;
                                    temp=temp&0xf0;
                              }
                     }
            }

            P3=0xfb;
            temp=P3;
            temp=temp&0xf0;
            if(temp!=0xf0)
            {
                  temp=P3;
                     delay(5);

                     temp=temp&0xf0;
                     if(temp!=0xf0)
                     {
                        temp=P3;
                              switch(temp)
                              {
                                    case 0xeb:num1=9;
                                    break;
                                    case 0xdb:num1=10;
                                    break;
                              }
                              while(temp!=0xf0)
                              {
                                    temp=P3;
                                    temp=temp&0xf0;
                              }
                     }
            }
      }
            return num1;
}

void main()
{
      init();
      for(num=0;num<5;num++)
      {
      write_data(table2[num]);//輸入  MIMA？
      delay(300);
      }
      write_com(0x80+0x40);//換行
      num2=keyscan(num1);//鍵盤檢測返回的值賦給num2
      init();
      switch(num2)
            {
                     case 1:write_data('0');break;
                     case 2:write_data('1');break;
                     case 3:write_data('2');break;
                     case 4:write_data('3');break;
                     case 5:write_data('4');break;
                     case 6:write_data('5');break;
                     case 7:write_data('6');break;
                     case 8:write_data('7');break;
                     case 9:write_data('8');break;
                     case 10:write_data('9');break;
            }
            while(1);
}