msp430单片机实现计算器功能

1、Msp430简易计算器设计设计任务：.实现计算器基本”+,-,*,/”运算功能。.八个数码管，第一位显示符号位，第二位空置，剩余六位显示数字，结果溢出显示“EER；.有自己独立的运算特色设计目的：学习使用单片机内部的I/O功能，熟悉I/O与键盘矩阵和数码管 的连接，熟练掌握单片机I/O的编程。设计方案：使用数组储存和调用内部数据，利用子函数实现各种运算功能， 另外添加阶乘factorial ()函数。程序代码：#include #define uchar unsigned char#define uint unsigned intunsignedcharleddata240 xc0,0 xf9

2、,0 xa4,0 xb0,0 x99,0 x92,0 x82,0 xf8,0 x80,0 x90,0 x88,0 x83,0 xc6,0 xa1,0 x86,0 x8e,0 x8f,0 xbf,0 x89,0 xb9,0 xff,0 x86,0 xaf,0 xcf;unsigned char time8 = 20,20,0,0,0,0,0,0;/初始数码管unsigned char getkey(void);unsigned int qiushu();long factorial(long a);void qingping(void);void fenjie();void delay(unsi

3、gned int asdf)for(uint asd=0;asdasdf;asd+);*主函数*void main(void)uchar flag=0,i=9;关闭看门狗WDTCTL = WDTPW + WDTHOLD;P5DIR|=BIT7;P5OUT&=BIT7;P4DIR=0 xff;P2DIR=0 xff;P1DIR=0 x0F;P1OUT=0 xff;while(1) long p,q,r;time1=20;i=getkey();if(i999999)|(r0) qingping();time5=21;time6=21;time7=22; else fenjie(r); break;

4、for(uchar j=0;jj;P2OUT=leddatatime皿delay(200);end of mainunsigned int qiushu()转化成相应的十进制整数unsigned int y;y=time2*100000+time3*10000+time4*1000+time5*100+time 6*10+time7;return y;void qingping(void) 清除屏幕unsigned int a;for(a=7;a1;a-)timea=0;void fenjie(long r)提取十进制整数各位数值，并显示time7=r%10;time6=r/10%10;tim

5、e5=r/100%10;time4=r/1000%10;time3=r/10000%10;time2=r/100000%10; long factorial(long a)long x,i;x=a;for(i=1;ia;i+)x=x*(a-i);return(x);uchar getkey(void)获取键值uchar z,x=16;P1OUT=0 x00;if(!(P1IN&BIT6)|(!(P1IN&BIT7)|(!(P1IN&BIT5)|(!(P1IN&BIT4) delay(10000);if(!(P1IN&BIT6)|(!(P1IN&BIT7)|(!(P1IN&BIT5)|(!(P1

6、IN&BIT4) for(z=0;z=1;z+)P1OUT=BIT0;if(!(P1IN&BIT7) x=3;break; P1OUT=BIT0; if(!(P1IN&BIT6) x=7;break; P1OUT=BIT0;if(!(P1IN&BIT5) x=11;break;P1OUT=BIT0;if(!(P1IN&BIT4) x=15;break; /line 1P1OUT=BIT1;if(!(P1IN&BIT7) x=2;break; P1OUT=BIT1; if(!(P1IN&BIT6) x=6;break; P1OUT=BIT1;if(!(P1IN&BIT5) x=10;break;

7、 if(!(P1IN&BIT4) x=14;break; line3P1OUT=BIT3;if(!(P1IN&BIT6) x=4; break; P1OUT=BIT3;if(!(P1IN&BIT7)x=0; break;P1OUT=BIT3;if(!(P1IN&BIT5) x=8; break; P1OUT=BIT3;if(!(P1IN&BIT4)x=12; break;/line 2P1OUT=BIT2;if(!(P1IN&BIT6) x=5; break; P1OUT=BIT2;if(!(P1IN&BIT7) x=1; break; P1OUT=BIT2;if(!(P1IN&BIT5) x=9; break; P1OUT=BIT2;if(!(P1IN&BIT4) x=13; break;while(!(P1IN&BIT6)|(!(P1IN&BIT7)|(!(P1IN&BIT5)|(!(P1IN&BIT 4)for(uchar j=0;jj;P2OUT=leddatatimej; delay(500); delay(20000);while(!(P1IN&