基于51单片机的手机电话拨号盘模拟proteus仿真

article/2025/10/11 18:37:54

功能：
0.本项目采用STC89C52作为单片机系统的控制MCU
1.采用4X4矩阵键盘实现号码输入，并在LCD液晶上显示
2.按下enter键，显示calling…，并且蜂鸣器模拟电话拨号发声
3.按下*键，退格，按下#键，清楚电话号码
4.拨号过程中，长按#取消拨号
5.采用DC002作为电源接口可直接输入5V给整个系统供电

仿真图：
在这里插入图片描述

主程序：

#include <reg51.h>
#define uchar unsigned char
#define uint unsigned int
uchar keycode, DDram_value = 0xc0;
sbit rs = P2 ^ 0;
sbit rw = P2 ^ 1;
sbit e = P2 ^ 2;
sbit speaker = P2 ^ 3; 
uchar speakerCnt = 0; 
uchar code table[] = {0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x20};
uchar code table_designer[] = "Calling........";
void lcd_delay();
void delay(uint n);
void lcd_init(void);
void lcd_busy(void);
void lcd_wr_con(uchar c);
void lcd_wr_data(uchar d);
uchar checkkey(void);
uchar keyscan(void);void main()
{uchar num;lcd_init();while (1){keycode = keyscan();if ((keycode >= 0) && (keycode <= 9)){lcd_wr_con(0x06);lcd_wr_con(DDram_value);lcd_wr_data(table[keycode]);DDram_value++;}else if (keycode == 0x0a){lcd_wr_con(0x04);DDram_value--;if (DDram_value <= 0xc0){DDram_value = 0xc0;}else if (DDram_value >= 0xcf){DDram_value = 0xcf;}lcd_wr_con(DDram_value);lcd_wr_data(table[10]);}else if (keycode == 0x0b){lcd_wr_con(0x01); //清屏DDram_value = 0xc0;speakerCnt = 0;}else if (keycode == 0x0c){uchar sound;lcd_wr_con(0x06);lcd_wr_con(0x80);for (num = 0; num <= 14; num++){lcd_wr_data(table_designer[num]);}speakerCnt = 50;}if (speakerCnt >= 1){speaker = 0; //发出按键响声delay(2000);speaker = 1;delay(2000);speakerCnt--;}}
}void lcd_delay() //液晶屏显示延时函数
{uchar y;for (y = 0; y < 0xff; y++){;}
}void lcd_init(void) //液晶屏初始化函数，向液晶写入各种命令
{lcd_wr_con(0x01); //清屏lcd_wr_con(0x38); //两行显示，5×7点阵，8位数据接口lcd_wr_con(0x0c); //开整体显示，光标关，无闪烁lcd_wr_con(0x06); //
}void lcd_busy(void) //判断液晶显示器是否忙的函数
{P0 = 0xff;rs = 0;rw = 1;e = 1;e = 0;while (P0 & 0x80){e = 0;e = 1;}lcd_delay();
}void lcd_wr_con(uchar c) //向液晶显示器写命令
{lcd_busy();e = 0;rs = 0;rw = 0;e = 1;P0 = c;e = 0;lcd_delay();
}void lcd_wr_data(uchar d) //向液晶显示器写数据
{lcd_busy();e = 0;rs = 1;rw = 0;e = 1;P0 = d;e = 0;lcd_delay();
}void delay(uint n) //延时函数
{uchar i;uint j;for (i = 50; i > 0; i--)for (j = n; j > 0; j--);
}uchar checkkey(void) //检测是否有按键按下
{uchar temp;P1 = 0xf0;          //P1口低4位为低电平temp = P1;          //读入P1口的电平temp = temp & 0xf0; //读入P1口的8位状态，并判断两次状态是否相同if (temp == 0xf0)   //如果P1口两次状态相同，则无键按下{return (0); //函数返回值为0}else{return (1); //有键按下，函数返回值为1}
}uchar keyscan(void) //键盘扫描并返回所按下的键号函数
{uchar hanghao, liehao, keyvalue, buff;if (checkkey() == 0) //如果函数返回值为0，无键按下{return (0xff); //返回0xff}