矩陣鍵盤焊接及程式

2021-08-22 13:06:34 字數 1935 閱讀 7275

#ifndef __key_h


#define __key_h 


#include "sys.h" 


//行操作巨集定義


#define row1_write paout(0)


#define row2_write paout(2)


#define row3_write paout(3)


#define row1_read pain(0)


#define row2_read pain(2)


#define row3_read pain(3)


//列操作巨集定義


#define col1_write paout(7)


#define col2_write paout(6)


#define col3_write paout(4)


#define col1_read pain(7)


#define col2_read pain(6)


#define col3_read pain(4)


#define pin_out(x) //將io口配置為輸出


#define pin_in(x) //將io口配置為輸入


void key_init(void); //io初始化


u8 key_scan(u8); //按鍵掃瞄函式 


#endif
#include "key.h"


#include "delay.h" 


#include "usart.h"


void key_init(void)


//按鍵處理函式


u8 key_scan(u8 mode)


,,,};


u8 row=0,col=0;


col1_write=1;


col2_write=1;


col3_write=1;


//檢測行


if(row1_read==1||row2_read==1||row3_read==1)


else


return 0; //無按鍵按下


//改變輸入輸出模式


col1_write=0;


col2_write=0;


col3_write=0;


pin_out(0);


pin_out(2);


pin_out(3);


pin_in(4);


pin_in(6);


pin_in(7);


row1_write=1;


row2_write=1;


row3_write=1;


//檢測列


if(col1_read==1)


col=1;


else if(col2_read==1)


col=2;


else if(col3_read==1)


col=3;


//還原io口


pin_out(4);


pin_out(6);


pin_out(7);


pin_in(0);


pin_in(2);


pin_in(3);


if(row!=0&&col!=0)


else 


return 0;


}
#include "sys.h"


#include "delay.h" 


#include "key.h"


#include "usart.h"


#include "led.h"


int main(void)


} led0=0; } 


}

4 4矩陣鍵盤C51程式

include include define key port p0 鍵盤介面定義 sbit key port 0 key port 0 sbit key port 1 key port 1 sbit key port 2 key port 2 sbit key port 3 key port 3 ...

矩陣鍵盤掃瞄

矩陣鍵盤掃瞄一般採取行列掃瞄法。比如先拉低所有列線，拉高行線，之後讀取行線狀態，如果行線有一行為低，則假設有按鍵按下，此時再延時20毫秒左右後判 斷行線的某一行是否仍然為低，若為低則確認有鍵按下。這時可以進行按鍵鍵值判斷，即判別在哪一行哪一列有按鍵按下。判斷的方法是通過拉高列線，依次置行線 的某一行...

矩陣鍵盤掃瞄

矩陣鍵盤掃瞄 module matrix keyboard input clk 50m,50m時鐘 input rst n,復位 input 3 0 row,矩陣鍵盤行輸入 output reg 3 0 col,矩陣鍵盤列輸出 output reg key flag,按鍵按下標誌 output re...