单片机矩阵按键问题，求大神

只看该作者 · 2015-4-26 16:33

本帖最后由 ADC11 于 2015-4-26 16:50 编辑

#include<reg52.h>

  sbit ADDR0 = P1^0;
  sbit ADDR1 = P1^1;
  sbit ADDR2 = P1^2;
  sbit ADDR3 = P1^3;
  sbit ENLED = P1^4;

  sbit KEY_IN_4 = P2^7;
  sbit KEY_IN_3 = P2^6;
  sbit KEY_IN_2 = P2^5;
  sbit KEY_IN_1 = P2^4;
  sbit KEY_OUT_1 = P2^3;
  sbit KEY_OUT_2 = P2^2;
  sbit KEY_OUT_3 = P2^1;
  sbit KEY_OUT_4 = P2^0;

  unsigned char KeySta[4][4]={  {1,1,1,1},
                                                               {1,1,1,1},
                                                            {1,1,1,1},
                                                            {1,1,1,1},
                                                      };

unsigned char code LedChar[]={0xC0, 0xF9, 0xA4, 0xB0, 0x99,
                                                      0x92, 0x82, 0xF8, 0x80, 0x90,
                                                      0x83, 0xC6, 0xA1, 0x86, 0x8E};

void main ()
{
      unsigned char i,j;       unsigned char backup[4][4]={ {1,1,1,1},
                                                         {1,1,1,1},
                                                         {1,1,1,1},
                                                         {1,1,1,1},
                                                      };
      EA=1;
      ADDR3 = 1;
      ENLED = 0;
      ADDR0 = 0;
      ADDR1 = 0;
      ADDR2 = 0;
      TMOD = 0x01;
      TH0 = 0xFC;
      TL0 = 0x67;
      ET0=1;
      TR0=1;
      P0 = LedChar[0];

while(1)
{
for(i=0;i<4;i++)
{
for(j=0;j<4;j++)
{
if (backup[j] != KeySta[j])
{
if (backup[j] == 0)
{
P0 = LedChar[i*4+j];
}
backup[j] = KeySta[j];
}
}
}
}
}

void InterruptTimer0() interrupt 1
{
      unsigned char i;
      static unsigned       keyout = 0;
      unsigned char keychec[4][4] = {
                                                                     {0xFF,0xFF,0xFF,0xFF},{0xFF,0xFF,0xFF,0xFF},
                                                                     {0xFF,0xFF,0xFF,0xFF},{0xFF,0xFF,0xFF,0xFF}
                                                                     };
   TH0=0xfc;
      TLo=0x67;

      keychec[keyout][0] = (keychec[keyout][0] << 1) | KEY_IN_1;
      keychec[keyout][1] = (keychec[keyout][1] << 1) | KEY_IN_2;
      keychec[keyout][2] = (keychec[keyout][2] << 1) | KEY_IN_3;
      keychec[keyout][3] = (keychec[keyout][3] << 1) | KEY_IN_4;

      for(i=0;i<4;i++)
      {
            if ( (keychec[keyout] & 0x0F) == 0x00)
            {
                     KeySta[keyout] = 0;
            }
            else if ( (keychec[keyout] & 0x0F) == 0x0F)
            {
                     KeySta[keyout] = 1;
            }
      }
      keyout++;
      keyout = (keyout & 0x03);

      switch (keyout)
      {
            case 0 :  KEY_OUT_4 = 1       ;  KEY_OUT_1 = 0 ; break;
            case 1 :  KEY_OUT_1 = 1       ; KEY_OUT_2 = 0 ; break;
            case 2 :  KEY_OUT_2 = 1       ; KEY_OUT_3 = 0 ; break;
            case 3 :  KEY_OUT_3 = 1       ; KEY_OUT_4 = 0 ; break;
            default :break;
      }

}

只看该作者 · 2015-4-26 16:34

感觉没问题，下载到单片机里，按键没有反应

只看该作者 · 2015-4-26 16:35

中断里面不断扫描按键是否按下并消抖，主程序主要对数码管进行更行

只看该作者 · 2015-4-26 16:36

实在找不出错误，求大神指教，求求求。本人刚学，菜鸟一个

只看该作者 · 2015-4-29 15:44

                              if (backup[j] != KeySta[j])
                              {
                                    if (backup[j] == 0)
定义的是二维数组，怎么能这样比较