MSP430單片機矩陣鍵盤與數(shù)碼管實驗(附原理圖)

1、MSP430單片機矩陣鍵盤與數(shù)碼管實驗(附原理圖)*MSP430單片機矩陣鍵盤與數(shù)碼管實驗*功能：用共陽極數(shù)碼管顯示按鍵的鍵值*適用：MSP430各系列單片機*by:duyunfu1987/#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*/#includemsp430 x44x.h

2、#defineROWP2OUT/矩陣鍵盤的行宏定義#defineCOLP2IN/矩陣鍵盤的列宏定義#defineDPYOUTP3OUT/數(shù)碼管輸出口宏定義unsignedcharkeyval;/鍵值/共“陽”極數(shù)碼管的碼表unsignedcharLED7CA=0 x3F,0 x06,0 x5B,0 x4F,0 x66,0 x6D,0 x7D,0 x07,0 x7F,0 x6F,0 x77,0 x7C,0 x39,0 x5E,0 x79,0 x71,0 xff;/#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#

3、J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*函數(shù)名稱：keyscan()*功能：掃描4*3矩陣鍵盤，并返回鍵值*出口參數(shù)：若有按鍵則返回鍵值，若無按鍵返回15*4*3矩陣鍵盤：0123*4567*89Ab/#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#

4、J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*#J*/unsignedcharkeyscan()inti=0;unsignedcharkey=0;ROW=0 x8f;/先置三行輸出低電平if(COL&0 x0f)!=0 x0f)/是否有按鍵doi+;while(i3000);/消抖動延時ROW=0 xbf;/掃描第一行if(COL&0 x0f)=0 x0f)ROW=0 xdf;/掃描第二行if(COL&0 x0f)=0 x0f)ROW=0 xef;/掃描第三行if(COL&0 x0f)=0 x0f)key=15;elsekey=(ROW&0XF0)|(COL

5、&0X0F);elsekey=(ROW&0XF0)|(COL&0X0F);elsekey=(ROW&0XF0)|(COL&0X0F);if(key!=15)switch(key)/獲取有效地鍵值case0 x48:key=0;break;case0 x44:key=1;break;case0 x42:key=2;break;case0 x41:key=3;break;case0 x28:key=4;break;case0 x24:key=5;break;case0 x22:key=6;break;case0 x21:key=7;break;case0 x18:key=8;break;case0

6、 x14:key=9;break;case0 x12:key=10;break;case0 x11:key=11;break;default:key=15;elsekey=15;keyval=key;returnkey;voidmain(void)/StopwatchdogtimertopreventtimeoutresetWDTCTL=WDTPW+WDTHOLD;P3DIR|=0 xff;P3OUT=0 xff;/共陽極數(shù)碼管輸出口初始化P2DIR|=BIT4+BIT5+BIT6;/先配置矩陣鍵盤的行(輸出)/P2.6第一行，P2.5第二行，P2.4第三行/P2.3第一列，P2.2第二列，P2.1第三列，P2.0第四列keyval=16;while(1)keyscan();if(keyval!=15&keyvalrtCI-.H-3-.SndMIM務(wù)一務(wù)-嘉-RHHMIAHMJ.5LJL43HH4匚恩A-bLbHaA口骨凸一11口J.耳匚昱-MT-LSaZZ山F2JJt7574HrrM卑EJA口a&LJi7XLWJLO_L:PL伽JILJCJILfJ.QiTJL!N.LTTBOPJJiTBLPZJfTHEPJJilinXJKS.iilimi)fJ.aCETKJICIMCfl?2KiWra:PJJlUCLEDJJ.-4ITIDP3Ji7M的.釦65BUiTWJ4DL