【Proteus仿真】51单片机矩阵按键+中断+数码管显示+串口输出

• 📌相关篇《【Proteus仿真】51单片机矩阵按键扫描+外部中断使用》
• 📍《【Proteus仿真】51单片机串口输出实验》
• 🎈 《【Proteus仿真】51单片机定时器计数+共阴数码管驱动显示》

• 🔖Proteus仿真基础实验综合篇 -矩阵按键+中断+数码管显示+串口输出。

• 🌿Proteus8.12平台
• 🌿本实验代码基于VSM Studio，采用SDCC编译器。
• 🎬仿真演示：
  

📝示例代码

/* Main.c file generated by New Project wizard
 *
* Created:  2023-5-22
 * Processor: 80C52
 * Compiler:  SDCC for 8051
 */
#include <mcs51reg.h>
//#include <compiler.h>		//NOP()
//#include <8052.h>
//#include <stc89.h>
#include <stdio.h>

#define FOSC 11059200UL      //System frequency
#define BAUD 9600           //UART baudrate

#define T1MS (65536-FOSC/12/1000)   //1ms timer

#define COL1 (0xEF)
#define COL2 (0xDF)
#define COL3 (0xBF)
#define COL4 (0x7F)

#define wei1 (P2_0)
#define  wei2 (P2_1)
#define LED         (P2_2)

unsigned char key_val[] = {
    COL1, COL2, COL3, COL4
};

unsigned char  __code key_data[] = {
    0xEE, 0xED, 0xEB, 0xE7, // Key  1,  2,  3,  4
    0xDE, 0xDD, 0xDB, 0xD7, // Key  5,  6,  7,  8
    0xBE, 0xBD, 0xBB, 0xB7, // Key  9, 10, 11, 12
    0x7E, 0x7D, 0x7B, 0x77, // Key 13, 14, 15, 16
};
unsigned char __code table[] = {//
    0x3f,0x06,0x5b,0x4f,// 0 1 2 3
    0x66,0x6d,0x7d,0x07,// 4 5 6 7
    0x7f,0x6f // 8 9 
};

unsigned char key_row = 0;
unsigned char key_col = 0;
unsigned char Button_value = 0;
//unsigned int count = 0;

void delayms(unsigned int ms)
{
    unsigned int x;
    unsigned int y;
 
    for (y=ms; y>0; y--)
    {
        for (x=227; x>0; x--)
            ;
    }
}


void uart_init()
{
    SCON |= 0x50;
    TMOD |= 0x20;

 //  TH1 = 0xFD;//波特率9600
 //   TL1 = 0xFD;
	TH1 = (unsigned char)(((65536 - (FOSC/32/BAUD) )>>8)  - 2) ; 
	TL1 =  (unsigned char)(65536- (FOSC/32/BAUD)  - 2) ;
	TR1 = 1;
}

void SendData(char data1)
{
    SBUF = data1;
    while (!TI) ;
    TI = 0;
}

void SendString(unsigned char *buffer)
{
    unsigned char *p = buffer;
    while (*p)
    {
        SendData(*p);
        p++;
    }
}

int putchar(int data1)
{
	SendData(data1);
 return data1;

}

void int0_init()
{
    IT0 = 1; // 下降沿触发
    EX0 = 1; // 开外部中断0
	 EA = 1;                         //open global interrupt switch
}

void key_scan()
{
    unsigned char i = 0;

    for (i=0; i<4; i++)
    {
        key_col = key_val[i];
        P1 = key_col;
		delayms(2);
    }
}

void key_value(unsigned char value)
{
    unsigned char i = 0;
    for (i=0; i<16; i++)
    {
        if (value == key_data[i])
        {
			Button_value = i + 1;
			printf("Keyvalue:%d \r\n",Button_value);           
        }
    }
}
/*------------------------------------------------
                 外部中断（INT0）中断子程序
------------------------------------------------*/
void int0_isr(void) __interrupt 0 __using 1
{
    EX0 = 0;
    delayms(10); // 延时去抖
    key_row = P1;
    key_value(key_row);
    EX0 = 1;
}
void led_off()
{
    wei1= 1;
    wei2= 1;
}

void Display()
{
			TR0 = 0;                        //timer0 STOP
			wei1=0,wei2=1;
            P0= table[Button_value/10];
			delayms(6);
//			NOP();NOP();NOP();NOP();
			led_off();

			delayms(1);	//消隐
			NOP();NOP();
			wei1=1,wei2=0;
			P0= table[Button_value%10];
//			NOP();NOP();NOP();NOP();
			delayms(6);
//			NOP();NOP();
			led_off();
			delayms(1);	//消隐
			TR0 = 1;                        //timer0 start running
}
/*------------------------------------------------
                    定时器初始化子程序
------------------------------------------------*/
void Init_Timer0(void)
{
	
	TMOD |=  0x01;   //使用模式1，16位定时器，使用"|"符号可以在使用多个定时器时不受影响
    TL0 = T1MS;                     //initial timer0 low byte
    TH0 = T1MS >> 8;                //initial timer0 high byte
    TR0 = 1;                        //timer0 start running
    ET0 = 1;                        //enable timer0 interrupt
    EA = 1;                         //open global interrupt switch
}

/*------------------------------------------------
                 定时器0中断子程序
------------------------------------------------*/
void Timer0_isr(void) __interrupt 1 __using 2
{
	  TL0 = T1MS;                     //reload timer0 low byte
    TH0 = T1MS >> 8;                //reload timer0 high byte
	Display();
     LED = ! LED;    //指示灯反相，可以看到闪烁		


}
void main(void)
{

    Init_Timer0();
    int0_init();
    uart_init();
    while (1)
    {
	        // 键盘扫描
        key_scan();
		
    }
}

📚仿真资源

链接: https://pan.baidu.com/s/184Fl5bKJRg4HmRVFqSzW2g
提取码: vetd