[求助] DG128的3×3矩阵扫描求帮忙

quxiangyu 2015-4-12 21:30 楼主

DG128的3×3矩阵扫描求帮忙。这几天头都痛了。。。上拉电阻怎么用？3×3扫描程序失败好多次。新生求教。

回复评论（4）

沙发 quxiangyu

#include    /* common defines and macros */
#include "derivative.h"    /* derivative-specific definitions */
#include
#define C8LED PORTA
#define P3 PORTB
#pragma MESSAGE DISABLE C4000
byte LED_num[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x98};byte key=0;
void delayms (int m) {int x,y;for(x=0;x void display(key) C8LED=LED_num[key];
void matrixkeyscan()
{
byte temp;
P3=0x01;
temp=P3;
temp=temp&0xf0;
if(temp!=0x00)
{
   delayms(50);
   temp=P3;
   temp=temp&0xf0;
   if(temp!=0x00)
   {
      temp=P3;
      switch(temp)
      {
      case 0x11:
            key=1;
            break;

      case 0x21:
            key=2;
            break;

      case 0x41:
            key=3;
            break;

      }
      while(temp!=0x00)
      {
         temp=P3;
         temp=temp&0xf0;
      }
      display(key);
   }
}

P3=0x02;
temp=P3;
temp=temp&0xf0;
if(temp!=0x00)
{
   delayms(50);
   if(temp!=0x00)
   {
      temp=P3;
      switch(temp)
      {
      case 0x12:
            key=4;
            break;

      case 0x22:
            key=5;
            break;

      case 0x42:
            key=6;
            break;

      }
      while(temp!=0x00)
      {
         temp=P3;
         temp=temp&0xf0;
      }
      display(key);
   }
}
P3=0x04;
temp=P3;
temp=temp&0xf0;
if(temp!=0x00)
{
   delayms(50);
   if(temp!=0x00)
   {
      temp=P3;
      switch(temp)
      {
      case 0x14:
            key=7;
            break;

      case 0x24:
            key=8;
            break;

      case 0x44:
            key=9;
            break;

      }
      while(temp!=0x00)
      {
         temp=P3;
         temp=temp&0xf0;
      }
      display(key);
   }
}
}
  void main(void)
  {
DDRA=0xff;
DDRB=0x0f;PUCR=0X02;
while(1)

   {
   void matrixkeyscan()
   ;}

  }

点赞 2015-4-12 21:36

板凳 quxiangyu

各位帮忙改下程序，指教我这个新手，谢谢

点赞 2015-4-12 21:38

4楼 quxiangyu

程序改完了，不过我想实现数码管四位都亮。一个口就不能控制所有的段选型号和位选信号。
PA0—PA7为数码管a b c d e f g dg
PB1—PB6为矩阵键盘 123行456列
位选信号即数码管1234连VCC高电平
功能：四位数码管同时显示对应按键
#include    /* common defines and macros */
#include "derivative.h"    /* derivative-specific definitions */
#include
#define C8LED PORTA
#define P3 PORTB
#define display(key) C8LED=LED_num[key]
#pragma MESSAGE DISABLE C4000
byte LED_num[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x98};int key=0;
void delayms (int m) {int x,y;for(x=0;x
void matrixkeyscan()
{
byte temp;
P3=0xe0;
temp=P3;
temp=temp&0x0f;
if(temp!=0x0f)
{
   delayms(50);

   temp=temp&0x0f;
   if(temp!=0x0f)
   {

      switch(temp)
      {
      case 0x0d:
            key=1;
            break;

      case 0x0b:
            key=2;
            break;

      case 0x07:
            key=3;
            break;

      }

   }
}

P3=0xd0;
temp=P3;
temp=temp&0x0f;
if(temp!=0x0f)
{
   delayms(50);

   temp=temp&0x0f;
   if(temp!=0x0f)
   {

      switch(temp)
      {
      case 0x0d:
            key=4;
            break;

      case 0x0b:
            key=5;
            break;

      case 0x07:
            key=6;
            break;

      }

   }
}
P3=0xb0;
temp=P3;
temp=temp&0x0f;
if(temp!=0x0f)
{
   delayms(50);

   temp=temp&0x0f;
   if(temp!=0x0f)
   {

      switch(temp)
      {
      case 0x0d:
            key=7;
            break;

      case 0x0b:
            key=8;
            break;

      case 0x07:
            key=9;
            break;

      }

   }
}
display(key);
}
  void main(void)
  {
DDRA=0xff;
DDRB=0xf0;
while(1)

   {
      matrixkeyscan();
   }


  }

点赞 2015-4-13 22:48