STC12C5A60S2單片機控制LCD12864顯示的萬年歷出現顯示問題。求大佬幫助，真捉急！

ID:163090 · 發表于 2020-4-3 18:27

還有就是初始化ds1302以后，讀寫時間函數好像都沒有問題，但是屏幕上時間總是顯示不對。不知道是程序哪里出了問題，以下是主程序，請大佬幫幫忙看看，下圖就是顯示出現的問題
/*-----------------------------------------------
名稱：12864字庫液晶顯示
內容：通過顯示字符、數字、漢字和圖片測試液晶基本功能
------------------------------------------------*/

#include <stc12c5a60s2.h>
#include <intrins.h>
#include "delay.h"

sbit RS = P2^5;
sbit RW = P2^6;
sbit E  = P2^7;
sbit RES = P1^7;
sbit PSB = P1^6;
sbit beep = P3^7;

#define DataPort P0       //MCU P0<------> LCM

//
typedef unsigned char  U8;    /* defined for unsigned 8-bits integer variable    無符號8位整型變量  */
typedef signed char  S8;    /* defined for signed 8-bits integer variable    有符號8位整型變量  */
typedef unsigned int U16;    /* defined for unsigned 16-bits integer variable    無符號16位整型變量 */
typedef signed int S16;    /* defined for signed 16-bits integer variable    有符號16位整型變量 */
typedef unsigned long  U32;    /* defined for unsigned 32-bits integer variable    無符號32位整型變量 */
typedef signed long  S32;    /* defined for signed 32-bits integer variable    有符號32位整型變量 */
typedef float       F32;    /* single precision floating point variable (32bits) 單精度浮點數（32位長度） */
typedef double       F64;    /* double precision floating point variable (64bits) 雙精度浮點數（64位長度） */
//
#define uchar unsigned char
#define uint unsigned int
#define Data_0_time 4

//----------------------------------------------//
//----------------IO口定義區--------------------//
//----------------------------------------------//
sbit  P2_0  = P2^0 ;

//----------------------------------------------//
//----------------定義區--------------------//
//----------------------------------------------//
U8  U8FLAG,k;
U8  U8count,U8temp;
U8  U8T_data_H,U8T_data_L,U8RH_data_H,U8RH_data_L,U8checkdata;
U8  U8comdata;

U8 flag;
U8 jishi_flag = 0,count_up = 0;
unsigned char count=0,ss=0,sg=0,fs=0,fg=0,ms=0,mg=0,m=0,f=0,s=0,yue=1,ri=1;

unsigned char str1[]={"溫度:00%"},str2[2],str3[]={"濕度:00%"},str4[2],dat=1,cal[10]={"0001-01-01"};
//初始時間定義
uchar  time_buf[9] = {0x20,0x20,0x04,0x02,0x18,0x04,0x00,0x04};

#define uchar unsigned char
#define uint  unsigned int

//DS1302引腳定義
sbit RST=P3^5;
sbit IO=P3^4;
sbit SCK=P3^6;
//DS1302地址定義
#define ds1302_sec_add 0x80 //秒數據地址
#define ds1302_min_add 0x82 //分數據地址
#define ds1302_hr_add 0x84 //時數據地址
#define ds1302_date_add 0x86 //日數據地址
#define ds1302_month_add 0x88 //月數據地址
#define ds1302_day_add 0x8a //星期數據地址
#define ds1302_year_add 0x8c //年數據地址
#define ds1302_control_add 0x8e //控制數據地址
#define ds1302_charger_add 0x90
#define ds1302_clkburst_add 0xbe
#define Rds1302_year_add                0x8d
#define Rds1302_month_add             0x89
#define Rds1302_date_add                0x87
#define Rds1302_hr_add                   0x85
#define Rds1302_min_add                0x83
#define Rds1302_sec_add                0x81
#define Rds1302_day_add                0x8b
void SetNormalMode();
void Delay18ms() //@11.0592MHz
{
unsigned char i, j, k;

_nop_();
_nop_();
i = 1;
j = 194;
k = 159;
do
{
do
{
while (--k);
} while (--j);
} while (--i);
}
void Delay10us() //@11.0592MHz
{
unsigned char i;

_nop_();
_nop_();
_nop_();
i = 24;
while (--i);
}
//向DS1302寫入一字節數據
void ds1302_write_byte(uchar addr, uchar d)
{
uchar i;
RST=1; //啟動DS1302總線
_nop_(); //寫入目標地址：addr
//addr = addr & 0xFE; //最低位置零，寄存器0位為0時寫，為1時讀
for (i = 0; i < 8; i ++)
{
IO=addr & 0x01;
addr = addr >> 1;
SCK=1;
SCK=0;    //產生時鐘
}
//寫入數據：d
for (i = 0; i < 8; i ++) {
IO=d & 0x01;
d = d >> 1;
SCK=1;
SCK=0; //產生時鐘
}

RST=0; //停止DS1302總線
SCK=1;    /*時鐘線拉高*/
//IO=1; /*總線釋放*/
}

//從DS1302讀出一字節數據
uchar ds1302_read_byte(uchar addr) {

uchar i,dat,temp;
RST=1; //啟動DS1302總線
_nop_(); //寫入目標地址：addr
//addr = addr | 0x01; //最低位置高，寄存器0位為0時寫，為1時讀
for (i = 0; i < 8; i ++)
{
IO=addr & 0x01;

addr = addr >> 1;
SCK=1;
SCK=0;    //產生時鐘
}
//輸出數據：temp
for (i = 0; i < 8; i ++) {

         temp=IO;
   dat = (dat>>1) | (temp<<7);
         SCK=1;
         SCK=0;

}
RST=0; //停止DS1302總線
_nop_();
_nop_();

return dat;
}

//從DS302讀出時鐘數據
void ds1302_read_time(void)
{
time_buf[1]=ds1302_read_byte(Rds1302_year_add); //年
time_buf[2]=ds1302_read_byte(Rds1302_month_add); //月
time_buf[3]=ds1302_read_byte(Rds1302_date_add); //日
time_buf[4]=ds1302_read_byte(Rds1302_hr_add); //時
time_buf[5]=ds1302_read_byte(Rds1302_min_add); //分
time_buf[6]=ds1302_read_byte(Rds1302_sec_add);//&0x3f;//秒，屏蔽秒的第7位，避免超出59
time_buf[7]=ds1302_read_byte(Rds1302_day_add); //周
}

//DS1302初始化函數
void ds1302_init(void)
{
//RST=0; //RST腳置低
// SCK=0; //SCK腳置低

//向DS302寫入時鐘數據

ds1302_write_byte(ds1302_control_add,0x00); //關閉寫保護
//ds1302_write_byte(ds1302_sec_add,0x80); //暫停時鐘
ds1302_write_byte(ds1302_charger_add,0xa9);       //涓流充電
ds1302_write_byte(ds1302_year_add,time_buf[1]); //年
ds1302_write_byte(ds1302_month_add,time_buf[2]); //月
ds1302_write_byte(ds1302_date_add,time_buf[3]); //日
ds1302_write_byte(ds1302_hr_add,time_buf[4]); //時
ds1302_write_byte(ds1302_min_add,time_buf[5]); //分
ds1302_write_byte(ds1302_sec_add,time_buf[6]); //秒
ds1302_write_byte(ds1302_day_add,time_buf[7]); //周
//ds1302_write_byte(0xc0,0xaa);
ds1302_write_byte(ds1302_control_add,0x80); //打開寫保護

}

unsigned char code user16x16[]={ //笑臉圖片
0x0F,0xF0,0x10,0x08,0x20,0x04,0x40,0x02,0x9C,0x39,0xBE,0x7D,0x80,0x01,0x80,0x01,
0x80,0x01,0x88,0x11,0x84,0x21,0x43,0xC2,0x20,0x04,0x10,0x08,0x0F,0xF0,0x00,0x00,
};
unsigned char code pic1[]=    // 圖片代碼
{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

};

unsigned char code num[11][64]={

{// 圖片數字0
0x00,0x00,0x3F,0xFC,0x5F,0xFA,0x6F,0xF6,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,
0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x60,0x06,0x40,0x02,0x00,0x00,
0x40,0x02,0x60,0x06,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,
0x70,0x0E,0x70,0x0E,0x70,0x0E,0x6F,0xF6,0x5F,0xFA,0x3F,0xFC,0x00,0x00,0x00,0x00},
{// 圖片數字1
0x00,0x00,0x00,0x20,0x00,0x60,0x00,0xE0,0x00,0xE0,0x00,0xE0,0x00,0xE0,0x00,0xE0,
0x00,0xE0,0x00,0xE0,0x00,0xE0,0x00,0xE0,0x00,0x60,0x00,0x20,0x00,0x00,0x00,0x20,
0x00,0x60,0x00,0xE0,0x00,0xE0,0x00,0xE0,0x00,0xE0,0x00,0xE0,0x00,0xE0,0x00,0xE0,
0x00,0xE0,0x00,0xE0,0x00,0xE0,0x00,0x60,0x00,0x20,0x00,0x00,0x00,0x00,0x00,0x00},
{// 圖片數字2
0x00,0x00,0x3F,0xFC,0x1F,0xFA,0x0F,0xF6,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,
0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x06,0x1F,0xFA,0x3F,0xFC,
0x5F,0xF8,0x60,0x00,0x70,0x00,0x70,0x00,0x70,0x00,0x70,0x00,0x70,0x00,0x70,0x00,
0x70,0x00,0x70,0x00,0x70,0x00,0x6F,0xF8,0x5F,0xFC,0x3F,0xFE,0x00,0x00,0x00,0x00},
{// 圖片數字3
0x00,0x00,0x3F,0xFC,0x1F,0xFA,0x0F,0xF6,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,
0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x06,0x1F,0xFA,0x3F,0xFC,
0x1F,0xFA,0x00,0x06,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,
0x00,0x0E,0x00,0x0E,0x00,0x0E,0x0F,0xF6,0x1F,0xFA,0x3F,0xFC,0x00,0x00,0x00,0x00},
{// 圖片數字4
0x00,0x00,0x40,0x02,0x60,0x06,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,
0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x60,0x06,0x5F,0xFA,0x3F,0xFC,
0x1F,0xFA,0x00,0x06,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,
0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x06,0x00,0x02,0x00,0x00,0x00,0x00},
{// 圖片數字5
0x00,0x00,0x3F,0xFC,0x5F,0xF8,0x6F,0xF0,0x70,0x00,0x70,0x00,0x70,0x00,0x70,0x00,
0x70,0x00,0x70,0x00,0x70,0x00,0x70,0x00,0x70,0x00,0x60,0x00,0x5F,0xF8,0x3F,0xFC,
0x1F,0xFA,0x00,0x06,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,
0x00,0x0E,0x00,0x0E,0x00,0x0E,0x0F,0xF6,0x1F,0xFA,0x3F,0xFC,0x00,0x00,0x00,0x00},
{// 圖片數字6
0x00,0x00,0x3F,0xFC,0x5F,0xF8,0x6F,0xF0,0x70,0x00,0x70,0x00,0x70,0x00,0x70,0x00,
0x70,0x00,0x70,0x00,0x70,0x00,0x70,0x00,0x70,0x00,0x60,0x00,0x5F,0xF8,0x3F,0xFC,
0x5F,0xFA,0x60,0x06,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,
0x70,0x0E,0x70,0x0E,0x70,0x0E,0x6F,0xF6,0x5F,0xFA,0x3F,0xFC,0x00,0x00,0x00,0x00},
{// 圖片數字7
0x00,0x00,0x3F,0xFC,0x1F,0xFA,0x0F,0xF6,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,
0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x06,0x00,0x02,0x00,0x00,
0x00,0x02,0x00,0x06,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,
0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x06,0x00,0x02,0x00,0x00,0x00,0x00,0x00,0x00},
{// 圖片數字8
0x00,0x00,0x3F,0xFC,0x5F,0xFA,0x6F,0xF6,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,
0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x60,0x06,0x5F,0xFA,0x3F,0xFC,
0x5F,0xFA,0x60,0x06,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,
0x70,0x0E,0x70,0x0E,0x70,0x0E,0x6F,0xF6,0x5F,0xFA,0x3F,0xFC,0x00,0x00,0x00,0x00},
{// 圖片數字9
0x00,0x00,0x3F,0xFC,0x5F,0xFA,0x6F,0xF6,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,
0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x70,0x0E,0x60,0x06,0x5F,0xFA,0x3F,0xFC,
0x1F,0xFA,0x00,0x06,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,0x00,0x0E,
0x00,0x0E,0x00,0x0E,0x00,0x0E,0x1F,0xF6,0x3F,0xFA,0x7F,0xFC,0x00,0x00,0x00,0x00},
{// 圖片":" 10
//6X6方點
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,0xE0,0x07,0xE0,
0x07,0xE0,0x07,0xE0,0x07,0xE0,0x07,0xE0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,0xE0,0x07,0xE0,0x07,0xE0,0x07,0xE0,
0x07,0xE0,0x07,0xE0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}
};

unsigned char code kongbai[]=
{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};

/*------------------------------------------------
                  檢測忙位
------------------------------------------------*/

void init_timer()
{
TMOD=0x01;//模式1,16位計時
TH0=15536/256;
TL0=15536%256;
EA=1;
ET0=1;
TR0=1;
}
void Check_Busy()
{
RS=0;
RW=1;
E=1;
DataPort=0xff;
while((DataPort&0x80)==0x80);//忙則等待
E=0;
}
/*------------------------------------------------
               寫命令
------------------------------------------------*/
void Write_Cmd(unsigned char Cmd)
{
Check_Busy();
RS=0;
RW=0;
E=1;
DataPort=Cmd;
DelayUs2x(5);
E=0;
DelayUs2x(5);
}
/*------------------------------------------------
                  寫數據
------------------------------------------------*/
void Write_Data(unsigned char Data)
{
Check_Busy();
RS=1;
RW=0;
E=1;
DataPort=Data;
DelayUs2x(5);
E=0;
DelayUs2x(5);
}
/*------------------------------------------------
               液晶屏初始化
------------------------------------------------*/
void Init_ST7920()
{
DelayMs(40);          //大于40MS的延時程序
PSB=1;                //設置為8BIT并口工作模式
DelayMs(1);          //延時
RES=0;                //復位
DelayMs(1);          //延時
RES=1;                //復位置高
DelayMs(10);
Write_Cmd(0x30);    //選擇基本指令集
DelayUs2x(50);       //延時大于100us
Write_Cmd(0x30);    //選擇8bit數據流
DelayUs2x(20);       //延時大于37us
Write_Cmd(0x0c);    //開顯示(無游標、不反白)
DelayUs2x(50);       //延時大于100us
Write_Cmd(0x01);    //清除顯示，并且設定地址指針為00H
DelayMs(15);          //延時大于10ms
//Write_Cmd(0x06);    //指定在資料的讀取及寫入時，設定游標的移動方向及指定顯示的移位，光標從右向左加1位移動
DelayUs2x(50);       //延時大于100us
}
/*------------------------------------------------
               用戶自定義字符
------------------------------------------------*/
void CGRAM()
{
   int i;
   Write_Cmd(0x30);
   Write_Cmd(0x40);
   for(i=0;i<16;i++)
   {
      Write_Data(user16x16[i*2]);
      Write_Data(user16x16[i*2+1]);
   }
}
/*------------------------------------------------
               顯示用戶自定義字符
------------------------------------------------*/
void DisplayCGRAM(unsigned char x,unsigned char y)
{
switch(y)
   {
   case 1: Write_Cmd(0x80+x);break;
   case 2: Write_Cmd(0x90+x);break;
   case 3: Write_Cmd(0x88+x);break;
   case 4: Write_Cmd(0x98+x);break;
   default:break;
   }
Write_Data(00);
Write_Data(00);

}
/*------------------------------------------------
               顯示字符串
x:橫坐標值，范圍0~8
y:縱坐標值，范圍1~4
------------------------------------------------*/
void LCD_PutString(unsigned char x,unsigned char y,unsigned char *s)
{
SetNormalMode();
switch(y)
   {
   case 1: Write_Cmd(0x80+x);break;
   case 2: Write_Cmd(0x90+x);break;
   case 3: Write_Cmd(0x88+x);break;
   case 4: Write_Cmd(0x98+x);break;
   default:break;
   }
while(*s&&s)
{
   Write_Data(*s);
   s++;

}
}

/*------------------------------------------------
                  清屏
------------------------------------------------*/
void ClrScreen()
{
Write_Cmd(0x01);
DelayMs(15);
}

/*------------------------------------------------
               顯示圖片
------------------------------------------------*/
void LCD_PutGraphic(unsigned char code *img)
{
int i,j;
//顯示上半屏內容設置
for(i=0;i<32;i++)
{
   Write_Cmd(0x80 + i); //SET  垂直地址 VERTICAL ADD
   Write_Cmd(0x80);    //SET  水平地址 HORIZONTAL ADD
   for(j=0;j<16;j++)
   {
      Write_Data(*img);
      img++;
   }
}
//顯示下半屏內容設置
for(i=0;i<32;i++)
{
   Write_Cmd(0x80 + i); //SET 垂直地址 VERTICAL ADD
   Write_Cmd(0x88);    //SET 水平地址 HORIZONTAL ADD
   for(j=0;j<16;j++)
   {
      Write_Data(*img);
      img++;
   }
}

}

/*------------------------------------------------
               設置到繪圖模式
------------------------------------------------*/
void SetGraphicMode()
{ Write_Cmd(0x34);
Write_Cmd(0x36);    //選擇8bit數據流圖形模式
DelayUs2x(20);

}

void SetNormalMode()
{
Write_Cmd(0x30);    //選擇8bit數據流圖形模式
DelayUs2x(20);

}
void huatu(unsigned char x,unsigned char  *img)
{
unsigned char i,j;
SetGraphicMode();
for(i=0;i<32;i++)
{ //將屏幕分成上下兩個屏幕，上下兩個半屏幕的起始行列地址都是0x80,地址向后連續遞增
if(i<16)                //先寫入行地址，再寫入列地址，在連續寫入兩個字節數據
{ //列地址的范圍是0~15，從0x80開始，最后一個列地址是0x80+15
Write_Cmd(0x80+16+i); //行地址的范圍是0~31,從0x80開始，最后一個行地址是0x80+32
Write_Cmd(0x80+x);
}
if(i>=16)
{
Write_Cmd(0x80+i-16);
Write_Cmd(0x88+x);
}
for(j=0;j<2;j++)
{
Write_Data(*img);
        img++;
}
}

}

/*------------------------------------------------
               主程序
------------------------------------------------*/

main()
{
Init_ST7920();
ds1302_init();  //DS1302初始化

init_timer();
SetGraphicMode();    //設置成繪圖模式
LCD_PutGraphic(pic1);    //清屏
beep = 0;
while(1)
{

   ds1302_read_time();  //讀取時間

   cal[0] = (time_buf[0]>>4) + '0'; //年 cal[10]={"0001-01-01"};
   cal[1] = (time_buf[0]&0x0f) + '0';
   cal[2] = (time_buf[1]>>4) + '0';
   cal[3] = (time_buf[1]&0x0f) + '0';
   cal[5] = (time_buf[2]>>4) + '0'; //月
   cal[6] = (time_buf[2]&0x0f) + '0';
   cal[8] = (time_buf[3]>>4) + '0'; //日
   cal[9] = (time_buf[3]&0x0f) + '0';
   dat=(time_buf[7]&0x07); //星期


         ss=(time_buf[4]>>4); //時
   sg=(time_buf[4]&0x0f);
   fs=(time_buf[5]>>4); //分
   fg=(time_buf[5]&0x0f);

   ms=(time_buf[6]>>4); //秒
   mg=(time_buf[6]&0x0f);
huatu(0,num[ss]);
      huatu(1,num[sg]);
      huatu(3,num[fs]);
huatu(4,num[fg]);
      huatu(6,num[ms]);
huatu(7,num[mg]);
   if(count>=5 && count<=15)
   {
      huatu(2,num[10]); //繪畫出時鐘的冒號：
     huatu(5,num[10]);
   }
   else
   {
     huatu(2,kongbai);
huatu(5,kongbai);
   }

   LCD_PutString(0,1,cal);
   LCD_PutString(0,4,str1);
   LCD_PutString(4,4,str3);
switch(dat)
   {
   case 1: LCD_PutString(5,1,"星期一");    break;
   case 2: LCD_PutString(5,1,"星期二"); break;
   case 3: LCD_PutString(5,1,"星期叁"); break;
   case 4: LCD_PutString(5,1,"星期四"); break;
   case 5: LCD_PutString(5,1,"星期五"); break;
   case 6: LCD_PutString(5,1,"星期六"); break;
   case 7: LCD_PutString(5,1,"星期天"); break;
   default: break;

   }
}
}

void Timer0_INT() interrupt 1 //count每次加1，定時50000 us
{
TL0 = 0x00; //設置定時初值
TH0 = 0x4C;
count++;
}