C51数码管显示相关问题总结

雨点打透心脏的1/2处 2022-01-31 15:09 294阅读 0赞

**1.单个数码管的静态显示**

/*--------------------------
    功能：一个数码管的静态显示
    Author: Zhang Kaizhou
    Date: 2019-5-16 21:18:17
    --------------------------*/
    #include <reg52.h>
    
    sbit duan_address = P2^6; // 定义段地址为位寻址类型的变量
    sbit wei_address = P2^7; // 定义位地址为位寻址类型的变量
    
    void main()
    {
    	wei_address = 1; // 打开位锁存器
    	P0 = 0xfe; // 输出数码管所在的位置
    	wei_address = 0; // 关闭位锁存器
    	
    	duan_address = 1; // 打开段锁存器
    	P0 = 0x7d; // 输出共阴极数码管的段码(6)
    	duan_address = 0; // 关闭段锁存器
    	while(1);
    }

**2.数码管的动态循环显示**

/*-----------------------------------
    功能：在数码管上循环显示0~F 16个字符
    Author: Zhang Kaizhou
    Date: 2019-5-16 21:41:50
    -----------------------------------*/
    #include <reg52.h>
    #define uchar unsigned  char
    #define uint unsigned int
    
    sbit wei_address = P2^7; // 定义可位寻址类型的变量wei_address
    sbit duan_address = P2^6; // 定义可位寻址的变量daun_address
    uchar num; // 定义无符号字符变量num
    uchar code table[] = {0x3f, 0x06, 0x5b, 0x4f,
    					  0x66, 0x6d, 0x7d, 0x07,
    					  0x7f, 0x6f, 0x77, 0x7c,
    					  0x39, 0x5e, 0x79, 0x71}; // 定义一个无符号字符型数组table[]用于存放共阴极数码管(0~F字符)段码，存放在单片机内部的ROM或Flash中
    
    void delay(uint xms);
    									
    void main()
    {
    	wei_address = 1; // 开位锁存器
    	P0 = 0x00; // 选择要显示的数码管
    	wei_address = 0; // 关锁存器
    	while(1)
    	{
    		for(num = 0; num < 16; num++) // 在数码管上循环显示0~F字符
    		{
    			duan_address = 1; // 开数码管的段锁存器
    			P0 = table[num]; // 输出段码
    			duan_address = 0; // 关段锁存器
    			delay(1000); // 延时1000ms = 1s
    		}
    	}
    }
    
    void delay(uint xms)
    {
    	uint i, j;
    	for(i = xms; i > 0; i--)
    		for(j = 110; j > 0; j--);
    }

**3.多个数码管的动态扫描显示**

/*-----------------------------------
    功能：在4个数码管上动态显示字符信息
    Author: Zhang Kaizhou
    Date: 2019-5-16 21:41:50
    -----------------------------------*/
    #include <reg52.h>
    #define uchar unsigned  char
    #define uint unsigned int
    
    sbit wei_address = P2^7; // 定义可位寻址类型的变量wei_address
    sbit duan_address = P2^6; // 定义可位寻址的变量daun_address
    uchar num; // 定义无符号字符变量num
    uchar code table[] = {0x3f, 0x06, 0x5b, 0x4f,
    					  0x66, 0x6d, 0x7d, 0x07,
    					  0x7f, 0x6f, 0x77, 0x7c,
    					  0x39, 0x5e, 0x79, 0x71}; // 定义一个无符号字符型数组table[]，存放在单片机内部的ROM或Flash中
    
    void delay(uint xms);
    									
    void main()
    {
    	while(1)
    	{
    		// 显示0
    		duan_address = 1;
    		P0 = table[0];
    		duan_address = 0;
    		wei_address = 1;
    		P0 = 0xfe;
    		wei_address = 0;
    		delay(5);
    		
    		// 显示1
    		duan_address = 1;
    		P0 = table[1];
    		duan_address = 0;
    		P0 = 0xff; // 消影
    		wei_address = 1;
    		P0 = 0xfd;
    		wei_address = 0;
    		delay(5);
    		
    		// 显示2
    		duan_address = 1;
    		P0 = table[2];
    		duan_address = 0;
    		P0 = 0xff; // 消影
    		wei_address = 1;
    		P0 = 0xfb;
    		wei_address = 0;
    		delay(5);
    		
    		// 显示3
    		duan_address = 1;
    		P0 = table[3];
    		duan_address = 0;
    		P0 = 0xff; // 消影
    		wei_address = 1;
    		P0 = 0xf7;
    		wei_address = 0;
    		delay(5);
    	}
    }
    
    void delay(uint xms)
    {
    	uint i, j;
    	for(i = xms; i > 0; i--)
    		for(j = 110; j > 0; j--);
    }