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1、MSP430单片机"秒表"程序（完整）/*******************************************************基于MSP430F449单片机的秒表*功能：秒计时，8位数码管显示，包括小时、分钟、秒和毫秒*此程序同样适用于其他系列单片机*by:duyunfu1987******************************************************/#include"msp430x44x.h"#defineDPYOUTP3OUT//数码管的段选输出口#defineDPYCOM
2、P2OUT//38译码器的ABC输入#defineOPENOUTP2OUT
3、=BIT3//74HC573使能锁存段选#defineCLOSEOUTP2OUT&=~BIT3//74HC573无效inthour,min,sec,ms;//缓冲区定义，小时、分钟、秒、毫秒intcount=0;//2ms计数，计到5时ms增1//共“阴”极数码管的码表unsignedcharLED7CC[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0
4、x71};//延时n(us)voiddelay_us(intn){while(n-->0)_NOP();}//延时n(ms)voiddelay_ms(intdms){inti;while(dms-->0){for(i=0;i<250;i++);}}//初始化缓冲区与IO口voidInit(){hour=0;min=0;sec=0;ms=0;P2SEL=0;P3SEL=0;P2DIR
5、=BIT0+BIT1+BIT2+BIT3;//ABC使能位P2DIR&=~(BIT4+BIT5+BIT6);//按键P3DIR=0xff;P3OUT=oth
6、erstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOffice
7、oftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand0x00;}//8位数码管动态显示函数voiddisplay(){DPYOUT=0;_NOP();DPYOUT=LED7CC[ms%10];DPYCOM=7;OPENOUT;CLOSEOUT;DPYOUT=
8、LED7CC[ms/10];DPYCOM=6;OPENOUT;CLOSEOUT;DPYOUT=LED7CC[sec%10]
9、0x80;DPYCOM=5;OPENOUT;CLOSEOUT;DPYOUT=LED7CC[sec/10];DPYCOM=4;OPENOUT;CLOSEOUT;DPYOUT=LED7CC[min%10]
10、0x80;DPYCOM=3;OPENOUT;CLOSEOUT;DPYOUT=LED7CC[min/10];DPYCOM=2;OPENOUT;CLOSEOUT;DPYOUT=LED7CC[hour%10]
11、0x80;D
12、PYCOM=1;OPENOUT;CLOSEOUT;DPYOUT=LED7CC[hour/10];DPYCOM=0;OPENOUT;CLOSEOUT;}//按键处理函数voidkey_deal(intkey){switch(key){otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrec
13、orderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeenth
