LCD1602动态显示

雨点打透心脏的1/2处 2022-01-22 05:17 239阅读 0赞

**仿真元原理图如下：**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODY3OTkyNA_size_16_color_FFFFFF_t_70]

/*-------------------------------------
    功能：LCD1602局部动态显示
    描述：在屏幕的第二行固定位置显示count:
    后面接着动态显示按键次数(00 ~ 99)
    Author: Zhang Kaizhou
    Date: 2019-6-5 10:50:22
    -------------------------------------*/
    #include <reg52.h>
    #include <string.h>
    #define uchar unsigned char
    #define uint unsigned int
    	
    uchar code table0[] = {"Press time"}; // 每行的字符数据
    uchar code table1[] = {"Count:00"};
    uchar code table2[] = {"0123456789"};
    sbit lcdrs = P1^2; // LCD数据/命令选择端
    sbit lcdrw = P1^3; // LCD读写选择端
    sbit lcden = P1^4; // LCD使能端，高脉冲有效
    sbit k1 = P1^5;
    uchar num, ge = 0, shi = 0;
    
    void init();
    void displayInit();
    void keyScan();
    void writeCommand(uchar command);
    void delay(uchar xms);
    void writeData(uchar dat);
    
    void main()
    {
    	init();
    	displayInit();
    	while(1)
    	{	
    		keyScan();
    	}
    }
    
    /*初始化LCD1602的设置*/
    void init()
    {
    	lcden = 0; // 拉低使能端，准备产生使能高脉冲信号
    	writeCommand(0x38); // 显示模式设置(16x2， 5x7点阵，8位数据接口)
    	writeCommand(0x0c); // 开显示，不显示光标
    	writeCommand(0x06); // 写一个字符后地址指针自动加1
    	writeCommand(0x01); // 显示清零，数据指针清零
    }
    
    /*LCD上电界面*/
    void displayInit()
    {
    	writeCommand(0x80); // 将数据指针定位到第一行首
    	for(num = 0; num < strlen(table0); num++)
    	{
    		writeData(table0[num]);
    		delay(5);
    	}
    	
    	writeCommand(0x80 + 0x40); // 将数据指针定位到第二行首
    	for(num = 0; num < strlen(table1); num++)
    	{
    		writeData(table1[num]);
    		delay(5);
    	}
    }
    
    /*按键扫描*/
    void keyScan()
    {
    	writeCommand(0x80 + 0x40 + strlen(table1) - 0x01);
    	if(!k1)
    	{
    		delay(5);
    		if(!k1)
    		{	
    			while(!k1);
    			ge++;
    			if(ge == 10)
    			{
    				ge = 0;
    				shi++;
    				if(shi == 10)
    				{
    					shi = 0;
    					displayInit();
    				}else{
    					writeCommand(0x80 + 0x40 + strlen(table1) - 0x02);
    					writeData(table2[shi]);
    					writeCommand(0x80 + 0x40 + strlen(table1) - 0x01);
    					writeData(table2[ge]);
    				}
    			}else{
    				writeData(table2[ge]);
    			}
    		}
    	}
    }
    
    /*写指令函数*/
    void writeCommand(uchar command)
    {
    	lcdrs = 0; // 命令选择
    	lcdrw = 0;
    	P0 = command;
    	delay(5);
    	
    	lcden = 1; // 产生一个正脉冲使能信号
    	delay(5);
    	lcden = 0;
    }
    
    /*写数据函数*/
    void writeData(uchar dat)
    {
    	lcdrs = 1; // 数据选择
    	lcdrw = 0;
    	P0 = dat;
    	delay(5);
    	
    	lcden = 1;
    	delay(5);
    	lcden = 0;
    }
    
    /*延时函数*/
    void delay(uchar xms)
    {
    	uint i, j;
    	for(i = xms; i > 0; i--)
    		for(j = 110; j > 0; j--);
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODY3OTkyNA_size_16_color_FFFFFF_t_70]: /images/20220122/524874f3a2e74dfe8d6bd76a7eed401a.png