基于51单片机的手机电话拨号盘模拟proteus仿真-Toy模板网

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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：
基于51单片机的手机电话拨号盘模拟proteus仿真

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
    }