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1、单片机驱动4X4矩阵式键盘输入程序用AT89S51单片机的并行口P1接4×4矩阵键盘，以P1.0－P1.3作输入线，以P1.4－P1.7作输出线；在数码管上显示每个按键的“0－F”序号。实现键盘输入的识别。我将给大家提供c和汇编两个版本的4X4矩阵式键盘输入程序。如果网页上不清楚点此处下载本键盘输入程序源代码汇编语言源程序：KEYBUFEQU30HORG00HSTART:MOVKEYBUF,#2WAIT:MOVP3,#0FFHCLRP3.4MOVA,P3ANLA,#0FHXRLA,#0FHJZNOKEY1LCALLDELY10
2、MSMOVA,P3ANLA,#0FHXRLA,#0FHJZNOKEY1MOVA,P3ANLA,#0FHCJNEA,#0EH,NK1MOVKEYBUF,#0LJMPDK1NK1:CJNEA,#0DH,NK2MOVKEYBUF,#1LJMPDK1NK2:CJNEA,#0BH,NK3MOVKEYBUF,#2LJMPDK1NK3:CJNEA,#07H,NK4MOVKEYBUF,#3LJMPDK1NK4:NOPDK1:MOVA,KEYBUFMOVDPTR,#TABLEMOVCA,@A+DPTRMOVP0,ADK1A:MOVA,P3ANL
3、A,#0FHXRLA,#0FHJNZDK1ANOKEY1:MOVP3,#0FFHCLRP3.5MOVA,P3ANLA,#0FHXRLA,#0FHJZNOKEY2LCALLDELY10MSMOVA,P3ANLA,#0FHXRLA,#0FHJZNOKEY2MOVA,P3ANLA,#0FHCJNEA,#0EH,NK5MOVKEYBUF,#4LJMPDK2NK5:CJNEA,#0DH,NK6MOVKEYBUF,#5LJMPDK2NK6:CJNEA,#0BH,NK7MOVKEYBUF,#6LJMPDK2NK7:CJNEA,#07H,NK
4、8MOVKEYBUF,#7LJMPDK2NK8:NOPDK2:MOVA,KEYBUFMOVDPTR,#TABLEMOVCA,@A+DPTRMOVP0,ADK2A:MOVA,P3ANLA,#0FHXRLA,#0FHJNZDK2ANOKEY2:MOVP3,#0FFHCLRP3.6MOVA,P3ANLA,#0FHXRLA,#0FHJZNOKEY3LCALLDELY10MSMOVA,P3ANLA,#0FHXRLA,#0FHJZNOKEY3MOVA,P3ANLA,#0FHCJNEA,#0EH,NK9MOVKEYBUF,#8LJMPDK3
5、NK9:CJNEA,#0DH,NK10MOVKEYBUF,#9LJMPDK3NK10:CJNEA,#0BH,NK11MOVKEYBUF,#10LJMPDK3NK11:CJNEA,#07H,NK12MOVKEYBUF,#11LJMPDK3NK12:NOPDK3:MOVA,KEYBUFMOVDPTR,#TABLEMOVCA,@A+DPTRMOVP0,ADK3A:MOVA,P3ANLA,#0FHXRLA,#0FHJNZDK3ANOKEY3:MOVP3,#0FFHCLRP3.7MOVA,P3ANLA,#0FHXRLA,#0FHJZNO
6、KEY4LCALLDELY10MSMOVA,P3ANLA,#0FHXRLA,#0FHJZNOKEY4MOVA,P3ANLA,#0FHCJNEA,#0EH,NK13MOVKEYBUF,#12LJMPDK4NK13:CJNEA,#0DH,NK14MOVKEYBUF,#13LJMPDK4NK14:CJNEA,#0BH,NK15MOVKEYBUF,#14LJMPDK4NK15:CJNEA,#07H,NK16MOVKEYBUF,#15LJMPDK4NK16:NOPDK4:MOVA,KEYBUFMOVDPTR,#TABLEMOVCA,@A
7、+DPTRMOVP0,ADK4A:MOVA,P3ANLA,#0FHXRLA,#0FHJNZDK4ANOKEY4:LJMPWAITDELY10MS:MOVR6,#10D1:MOVR7,#248DJNZR7,$DJNZR6,D1RETTABLE:DB3FH,06H,5BH,4FH,66H,6DH,7DH,07HDB7FH,6FH,77H,7CH,39H,5EH,79H,71HENDC语言源程序：#includeunsignedcharcodetable[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0
8、x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};unsignedchartemp;unsignedcharkey;unsignedchari,j;//我的程序没有注释，不过很简单。有不懂的上单片机论坛51版块那解决http://www
