基于Atmega16的简易计算器实验设计和Proteus仿真.zip

#include<iom16v.h> #include "LCD1602.h" #include "MatrixKey.h" unsigned char L1[16];//显示第一行 unsigned char L2[16];//显示第二行 int result1 = 0; //存储第一个整数 int result2 = 0; //存储第二个整数 int Oper = 0; //存储运算符 unsigned int succeed_flag = 0,clear_flag=0;//计算完成标志位，清除标志位 void delay_1ms(void) { unsigned char i,j; for(i=0;i<40;i++) for(j=0;j<33;j++) {;} } void delay_xms(unsigned int x) { unsigned int i; for(i=0;i<x;i++) { delay_1ms(); } } void display_line1(void)//第一行输入显示 { static unsigned int num=0; unsigned char str = 0; /*如果有计算完成标志，将显示内容清除,并将此标志位清零*/ if(succeed_flag == 1) { sprintf((char *)L1," "); LCD_write_string(0,0,L1); sprintf((char *)L2," "); LCD_write_string(0,1,L2); succeed_flag = 0; num = 0; } switch(KeyResult) { case 0 : str = '0'; break; case 1 : str = '1'; break; case 2 : str = '2'; break; case 3 : str = '3'; break; case 4 : str = '4'; break; case 5 : str = '5'; break; case 6 : str = '6'; break; case 7 : str = '7'; break; case 8 : str = '8'; break; case 9 : str = '9'; break; case 10 : str = '+'; break; case 11 : str = '-'; break; case 12 : str = '*'; break; case 13 : clear_flag = 1; break; case 14 : str = '='; break; case 15 : str = '/'; break; default:break; } L1[num]=str; num++; if(clear_flag == 1) { sprintf((char *)L1," "); LCD_write_string(0,0,L1); sprintf((char *)L2," "); LCD_write_string(0,1,L2); num=0; clear_flag=0; } LCD_write_string(0,0,L1); key_flag=0; if(num>=16) { num=0; } } /*识别第一个数字*/ void distinguish_num1(void) { static int num = 0; unsigned int key; key=KeyResult; /*如果被按下的是数字*/ switch(key) { case 0 : num = num * 10 + 0; break; case 1 : num = num * 10 + 1; break; case 2 : num = num * 10 + 2; break; case 3 : num = num * 10 + 3; break; case 4 : num = num * 10 + 4; break; case 5 : num = num * 10 + 5; break; case 6 : num = num * 10 + 6; break; case 7 : num = num * 10 + 7; break; case 8 : num = num * 10 + 8; break; case 9 : num = num * 10 + 9; break; default:break; } /*如果被按下的是运算符，则将之前的数字进行合成，然后保存运算符*/ if(key == 10) { /*加法*/ Oper = 1; result1 = num; num = 0; //将num清零，避免影响之后的计算 } else if(key == 11) { /*减法*/ Oper = 2; result1 = num; num = 0; //将num清零，避免影响之后的计算 } else if(key == 12) { /*乘法*/ Oper = 3; result1 = num; num = 0; //将num清零，避免影响之后的计算 } else if(key == 13) { /*清除*/ result1 = 0; Oper = 0; num = 0; } else if(key == 15) { /*除法*/ Oper = 4; result1 = num; num = 0; //将num清零，避免影响之后的计算 } } /*识别第二个数字*/ void distinguish_num2(void) { static int num = 0; /*如果被按下的是数字*/ unsigned int key; key=KeyResult; switch(key) { case 0 : num = num * 10 + 0; break; case 1 : num = num * 10 + 1; break; case 2 : num = num * 10 + 2; break; case 3 : num = num * 10 + 3; break; case 4 : num = num * 10 + 4; break; case 5 : num = num * 10 + 5; break; case 6 : num = num * 10 + 6; break; case 7 : num = num * 10 + 7; break; case 8 : num = num * 10 + 8; break; case 9 : num = num * 10 + 9; break; default:break; } if(key == 13) { /*清除*/ result2 = 0; Oper = 0; num = 0; } /*当等于号被按下时，识别第二个数字，并将结果计算，显示*/ if(key == 14) { result2 = num; if(Oper == 1) /*加*/ { result2 = result1 + result2; } else if(Oper == 2) /*减*/ { result2 = result1 - result2; } else if(Oper == 3) /*乘*/ { result2 = result1 * result2; } else if(Oper == 4) /*除*/ { result2 = result1 / result2; } sprintf((char *)L2,"%d ",result2); LCD_write_string(0,1,L2); /*将第一，二个数字,运算符以及保存的num清零*/ result1 = 0; result2 = 0; Oper = 0; num = 0; /*计算完成标志置1*/ succeed_flag = 1; } } void main() { LCD1602_init(); while(1) { Key_Scan(); if(key_flag) { display_line1(); /*当第一串数字没有识别时，执行此函数，识别第一串数字以及运算符*/ if(Oper == 0) { distinguish_num1(); } /*当第一串数字以及运算符已经确定的时候，执行识别第二串数字函数*/ else { distinguish_num2(); } } } }