MSP430单片机矩阵键盘与数码管实验(附原理图)

1、MSP430单片机矩阵键盘与数码管实验(附原理图)*MSP430单片机矩阵键盘与数码管实验*功能：用共阳极数码管显示按键的键值*适用：MSP430各系列单片机*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/矩阵键盘的行宏定义#defineCOLP2IN/矩阵键盘的列宏定义#defineDPYOUTP3OUT/数码管输出口宏定义unsignedcharkeyval;/键值/共“阳”极数码管的码表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*函数名称：keyscan()*功能：扫描4*3矩阵键盘，并返回键值*出口参数：若有按键则返回键值，若无按键返回15*4*3矩阵键盘：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;/先置三行输出低电平if(COL&0 x0f)!=0 x0f)/是否有按键doi+;while(i3000);/消抖动延时ROW=0 xbf;/扫描第一行if(COL&0 x0f)=0 x0f)ROW=0 xdf;/扫描第二行if(COL&0 x0f)=0 x0f)ROW=0 xef;/扫描第三行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)/获取有效地键值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;/共阳极数码管输出口初始化P2DIR|=BIT4+BIT5+BIT6;/先配置矩阵键盘的行(输出)/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务一务-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