這個51單片機延遲函數為什么不對?

ID:894974 · 發表于 2021-4-6 20:51

#include<reg52.h> //包含頭文件，一般情況不需要改動，頭文件包含特殊功能寄存器的定義
#include<intrins.h>

sbit RS = P1^0; //定義端口
sbit RW = P1^1;
sbit EN = P2^5;
sbit DU = P2^0;
sbit WE = P2^1;

#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

void cmg88()//關數碼管，點陣函數
{
DU=1;
P0=0X00;
DU=0;
}
/*------------------------------------------------
            延遲函數
------------------------------------------------*/
void delay(unsigned int xms)
{
unsigned int i,j;                毫秒
for(i=xms;i>0;i--)
      for(j=114;j>0;j--);
}

/*------------------------------------------------
            判忙函數
------------------------------------------------*/
bit LCD_Check_Busy(void)
{
DataPort= 0xFF;
RS_CLR;
RW_SET;
EN_CLR;
_nop_();
EN_SET;
return (bit)(DataPort & 0x80);
}
/*------------------------------------------------
            寫入命令函數
------------------------------------------------*/
void LCD_Write_Com(unsigned char com)
{
while(LCD_Check_Busy()); //忙則等待
RS_CLR;
RW_CLR;
EN_SET;
DataPort= com;
_nop_();
EN_CLR;
}
/*------------------------------------------------
            寫入數據函數
------------------------------------------------*/
void LCD_Write_Data(unsigned char Data)
{
while(LCD_Check_Busy()); //忙則等待
RS_SET;
RW_CLR;
EN_SET;
DataPort= Data;
_nop_();
EN_CLR;
}

/*------------------------------------------------
            清屏函數
------------------------------------------------*/
void LCD_Clear(void)
{
LCD_Write_Com(0x01);
DelayMs(5);
}
/*------------------------------------------------
            寫入字符串函數
------------------------------------------------*/
void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s)
{
if (y == 0)
      {
      LCD_Write_Com(0x80 + x);    //表示第一行
      }
else
      {
      LCD_Write_Com(0xC0 + x);    //表示第二行
      }
while (*s)
      {
LCD_Write_Data( *s);
s ++;
      }
}
/*------------------------------------------------
            寫入字符函數
------------------------------------------------*/
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);
}
/*------------------------------------------------
            初始化函數
------------------------------------------------*/
void LCD_Init(void)
{
LCD_Write_Com(0x38); /*顯示模式設置*/
DelayMs(5);
LCD_Write_Com(0x38);
DelayMs(5);
LCD_Write_Com(0x38);
DelayMs(5);
LCD_Write_Com(0x38);
LCD_Write_Com(0x08); /*顯示關閉*/
LCD_Write_Com(0x01); /*顯示清屏*/
LCD_Write_Com(0x06); /*顯示光標移動設置*/
DelayMs(5);
LCD_Write_Com(0x0C); /*顯示開及光標設置*/
}

/*------------------------------------------------
                  主函數
------------------------------------------------*/
void main(void)
{
cmg88();//關數碼管，點陣函數
LCD_Init();
LCD_Clear();//清屏
while (1)
{
  LCD_Write_Char(1,0,'-');
  LCD_Write_Char(2,0,'-');
  LCD_Write_Char(3,0,'-');
  LCD_Write_Char(4,0,'-');
  LCD_Write_Char(5,0,'-');
  LCD_Write_Char(6,0,'>');
  LCD_Write_Char(7,0,'3');
  LCD_Write_Char(8,0,'<');
  LCD_Write_Char(9,0,'-');
  LCD_Write_Char(10,0,'-');
  LCD_Write_Char(11,0,'-');
  LCD_Write_Char(12,0,'-');
  LCD_Write_Char(13,0,'-');
  delay(2000);

  LCD_Write_Char(1,0,'-');
  LCD_Write_Char(2,0,'-');
  LCD_Write_Char(3,0,'-');
  LCD_Write_Char(4,0,'-');
  LCD_Write_Char(5,0,'-');
  LCD_Write_Char(6,0,'>');
  LCD_Write_Char(7,0,'2');
  LCD_Write_Char(8,0,'<');
  LCD_Write_Char(9,0,'-');
  LCD_Write_Char(10,0,'-');
  LCD_Write_Char(11,0,'-');
  LCD_Write_Char(12,0,'-');
  LCD_Write_Char(13,0,'-');
  delay(2000);

  LCD_Write_Char(1,0,'-');
  LCD_Write_Char(2,0,'-');
  LCD_Write_Char(3,0,'-');
  LCD_Write_Char(4,0,'-');
  LCD_Write_Char(5,0,'-');
  LCD_Write_Char(6,0,'>');
  LCD_Write_Char(7,0,'1');
  LCD_Write_Char(8,0,'<');
  LCD_Write_Char(9,0,'-');
  LCD_Write_Char(10,0,'-');
  LCD_Write_Char(11,0,'-');
  LCD_Write_Char(12,0,'-');
  LCD_Write_Char(13,0,'-');
  delay(2000);

  LCD_Write_String(1,1,"6666666666");
  while(1);
}
}