基于51单片机+按键键盘+lcd1602显示+蜂鸣器设计的智能计算器软件源码

智能计算器软件源码：

#include <reg51.h>
#include <intrins.h>
#define uint unsigned int
#define uchar unsigned char

sbit k0 = P3^2;
sbit k1 = P3^3;
sbit k2 = P3^4;
sbit k3 = P3^5;
sbit beep = P2^3;

uchar code table[] = {
	'0','1','2','3','+',
	'4','5','6','-', 0,
	'7','8','9','*', 0,
	'.','=','C','/', 0
};

void delay(uint z){
	uint x,y;
	for(x=z;x>0;x--){
		for(y=110;y>0;y--);
	}
}

void key_scan(){
	uchar temp,i;
	P0 = 0xf0;
	temp = P0;
	temp &= 0xf0;
	if(temp != 0xf0){
		delay(5);
		temp = P0;
		temp &= 0xf0;
		if(temp != 0xf0){
			temp >>= 4;
			switch(temp){
				case 0x0e:
					P2 = 0xfe;
					for(i=0;i<20;i++){
						if(!k0) break;
						delay(10);
					}
					if(i == 20){
						beep = 0;
					}
					break;
				case 0x0d:
					P2 = 0xfd;
					for(i=0;i<20;i++){
						if(!k1) break;
						delay(10);
					}
					if(i == 20){
						beep = 0;
					}
					break;
				case 0x0b:
					P2 = 0xfb;
					for(i=0;i<20;i++){
						if(!k2) break;
						delay(10);
					}
					if(i == 20){
						beep = 0;
					}
					break;
				case 0x07:
					P2 = 0xf7;
					for(i=0;i<20;i++){
						if(!k3) break;
						delay(10);
					}
					if(i == 20){
						beep = 0;
					}
					break;
				default:
					break;
			}
			P2 = 0xff;
		}
	}
}

void write_com(uchar com){
	P2 = 0;
	P0 = com;
	_nop_();
	P2 = 0x40;
	delay(2);
	P2 = 0;
}

void write_data(uchar date){
	P2 = 0x80;
	P0 = date;
	_nop_();
	P2 = 0xc0;
	delay(2);
	P2 = 0;
}

void init(){
	write_com(0x38);
	write_com(0x0c);
	write_com(0x06);
	write_com(0x01);
}

void main(){
	uchar n=0,s=0,c=0;
	init();
	while(1){
		key_scan();
		if(!k0){
			beep = 0;
			write_data(table[n]);
			delay(500);
			beep = 1;
			n++;
			n %= 20;
		}
		if(!k1){
			beep = 0;
			write_data(table[s]);
			delay(500);
			beep = 1;
			s++;
			s %= 20;
		}
		if(!k2){
			beep = 0;
			write_com(0x18);
			c++;
			if(c > 15){
				c = 0;
				write_com(0x18);
			}
			beep = 1;
		}
		if(!k3){
			beep = 0;
			write_com(0x01);
			n = 0;
			s = 0;
			c = 0;
			beep = 1;
		}
	}
}

这是基于51单片机，使用按键键盘和LCD1602显示屏设计的智能计算器软件源码。其中使用了4个按键进行控制，按键K0~K3分别对应数字和运算符的输入、切换显示内容、清空屏幕和清零操作。源码实现通过按键输入数字和运算符，将输入内容显示在LCD1602上。同时还实现了蜂鸣器功能，以便在按下按键时发出提示音。