1602液晶动态显示

ID:350005 · 发表于 2018-7-10 22:03

#include<reg52.h> //包含头文件，一般情况不需要改动，头文件包含特殊功能寄存器的定义
#include<intrins.h>

sbit RS = P2^4; //定义端口
sbit RW = P2^5;
sbit EN = P2^6;

#define RS_CLR RS=0
#define RS_SET RS=1

#define RW_CLR RW=0
#define RW_SET RW=1

#define EN_CLR EN=0
#define EN_SET EN=1

#define DataPort P0
/*------------------------------------------------
uS延时函数，含有输入参数 unsigned char t，无返回值
unsigned char 是定义无符号字符变量，其值的范围是
0~255 这里使用晶振12M，精确延时请使用汇编,大致延时
长度如下 T=tx2+5 uS
------------------------------------------------*/
void DelayUs2x(unsigned char t)
{
while(--t);
}
/*------------------------------------------------
mS延时函数，含有输入参数 unsigned char t，无返回值
unsigned char 是定义无符号字符变量，其值的范围是
0~255 这里使用晶振12M，精确延时请使用汇编
------------------------------------------------*/
void DelayMs(unsigned char t)
{

while(t--)
{
   //大致延时1mS
   DelayUs2x(245);
      DelayUs2x(245);
}
}
/*------------------------------------------------
            判忙函数
------------------------------------------------*/
bit LCD_Check_Busy(void)
{
DataPort= 0xFF;
RS_CLR;
RW_SET;
EN_CLR;
_nop_();
EN_SET;
return (bit)(DataPort & 0x80);
}
/*------------------------------------------------
            写入命令函数
------------------------------------------------*/
void LCD_Write_Com(unsigned char com)
{
while(LCD_Check_Busy()); //忙则等待
RS_CLR;
RW_CLR;
EN_SET;
DataPort= com;
_nop_();
EN_CLR;
}
/*------------------------------------------------
            写入数据函数
------------------------------------------------*/
void LCD_Write_Data(unsigned char Data)
{
while(LCD_Check_Busy()); //忙则等待
RS_SET;
RW_CLR;
EN_SET;
DataPort= Data;
_nop_();
EN_CLR;
}

/*------------------------------------------------
            清屏函数
------------------------------------------------*/
void LCD_Clear(void)
{
LCD_Write_Com(0x01);
DelayMs(5);
}
/*------------------------------------------------
            写入字符串函数
------------------------------------------------*/
void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s)
{
if (y == 0)
      {
      LCD_Write_Com(0x80 + x);
      }
else
      {
      LCD_Write_Com(0xC0 + x);
      }
while (*s)
      {
LCD_Write_Data( *s);
s ++;
      }
}
/*------------------------------------------------
            写入字符函数
------------------------------------------------*/
void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data)
{
if (y == 0)
      {
      LCD_Write_Com(0x80 + x);
      }
else
      {
      LCD_Write_Com(0xC0 + x);
      }
LCD_Write_Data( Data);
}
/*------------------------------------------------
            初始化函数
------------------------------------------------*/
void LCD_Init(void)
{
LCD_Write_Com(0x38); /*显示模式设置*/
DelayMs(5);
LCD_Write_Com(0x38);
DelayMs(5);
LCD_Write_Com(0x38);
DelayMs(5);
LCD_Write_Com(0x38);
LCD_Write_Com(0x08); /*显示关闭*/
LCD_Write_Com(0x01); /*显示清屏*/
LCD_Write_Com(0x06); /*显示光标移动设置*/
DelayMs(5);
LCD_Write_Com(0x0C); /*显示开及光标设置*/
}

/*------------------------------------------------
                  主函数
------------------------------------------------*/
void main(void)
{
unsigned char i;
unsigned char *p;

LCD_Init();

while (1)
{
i = 1;
p = "3333333";
LCD_Clear();
LCD_Write_String(2,0,"Welcome to");
DelayMs(250);
while (*p)
      {
      LCD_Write_Char(i,1,*p);
      i ++;
      p ++;
      DelayMs(250);
      }
  DelayMs(250);
}
}

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