各路大神，求解求解！！！

ti

#include
#include
#include
***it DQ=P1^4;
***it DQ1=P1^5;
***it DQ2=P1^6;
***it squ=P1^0;
***it red=P1^1;
***it green=P1^2;
***it beep=P1^3;
***it k1=P3^0;
***it k2=P3^1;
***it k3=P3^2;
***it k4=P3^3;
***it k5=P3^4;
***it RS = P2^4;
***it RW = P2^5;
***it E  = P2^6;
***it RES = P2^1;
***it PSB = P2^3;
***it PAUSE = P3^0;
#define DataPort P0
bit ReadTempFlag;//定义读时间标志
unsigned char curr,currold,k5num,flag,flag1;
char displaytemp[16];//定义显示区域临时存储数组
int tempH,tempL,tempH1,tempL1,tempH2,tempL2,f;
int temp;
float temperature;
void Init_timer(void);//定时器初始化
/*------------------------------------------------
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);
}
}

unsigned char code user16x16[]={ //箭头图片
0x00,0x00,0x20,0x00,0x30,0x00,0x38,0x00,0x3C,0x00,0x3E,0x00,0x3F,0x00,0x3F,0x80,
0x3F,0xC0,0x3F,0x80,0x3F,0x00,0x3E,0x00,0x3C,0x00,0x38,0x00,0x30,0x00,0x20,0x00,
};
unsigned char code *MainMenu[]=
{
{"  1.温度采集"},
{"  2.方波可调"},
};
unsigned char code pic1[]=    // 图片代码    显示福州大学阳光学院
{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x00,0x00,0x00,0x18,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x06,0x0C,0x00,0x04,0x00,0x80,0x02,0x90,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x02,0x30,0x04,0x44,0x00,0x80,0x02,0x20,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x04,0x04,0x44,0x00,0x80,0x00,0x24,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x02,0x7C,0x04,0x44,0x00,0x80,0x07,0xDF,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x3E,0x4C,0x05,0x54,0x00,0xBC,0x18,0x44,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x04,0x30,0x15,0x54,0x0F,0xC0,0x13,0xE0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x06,0x1F,0x14,0x44,0x00,0x80,0x00,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x0D,0xF3,0x04,0x44,0x00,0xC0,0x00,0x7E,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x14,0x9E,0x04,0x44,0x01,0x40,0x1F,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x24,0x92,0x08,0x44,0x01,0x20,0x00,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x04,0x9E,0x08,0x04,0x02,0x10,0x00,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x04,0x62,0x10,0x04,0x04,0x1C,0x00,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x04,0x00,0x00,0x04,0x08,0x02,0x01,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x04,0x00,0x01,0x80,0x05,0x20,0x00,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x3C,0x00,0x01,0x10,0x04,0x40,0x3C,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x24,0x1C,0x01,0x30,0x00,0x48,0x28,0x78,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x24,0xE8,0x05,0x40,0x0F,0xBE,0x29,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x24,0x88,0x01,0x00,0x30,0x88,0x2A,0x20,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x24,0x88,0x01,0xF8,0x27,0xC0,0x2D,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x3C,0xF8,0x1E,0x80,0x01,0x00,0x24,0x30,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x24,0x88,0x02,0x80,0x00,0xFC,0x23,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x20,0x8C,0x04,0x80,0x3F,0x80,0x20,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x20,0xF8,0x0C,0x82,0x00,0x80,0x21,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x20,0x08,0x08,0x82,0x00,0x80,0x22,0x44,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x20,0x00,0x10,0x46,0x00,0x80,0x24,0x3E,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x20,0x00,0x60,0x7C,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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,

};

/*------------------------------------------------
                  检测忙位
------------------------------------------------*/
void Check_Busy()
{
RS=0;
RW=1;
E=1;
DataPort=0xff;
while((DataPort&0x80)==0x80);//忙则等待
E=0;
}
/*------------------------------------------------
               写命令
------------------------------------------------*/
void Write_Cmd(unsigned char Cmd)
{
Check_Busy();
RS=0;
RW=0;
E=1;
DataPort=Cmd;
DelayUs2x(5);
E=0;
DelayUs2x(5);
}
/*------------------------------------------------
                  写数据
------------------------------------------------*/
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的延时程序
PSB=1;                //设置为8BIT并口工作模式
DelayMs(1);          //延时
RES=0;                //复位
DelayMs(1);          //延时
RES=1;                //复位置高
DelayMs(10);
Write_Cmd(0x30);    //选择基本指令集
DelayUs2x(50);       //延时大于100us
Write_Cmd(0x30);    //选择8bit数据流
DelayUs2x(20);       //延时大于37us
Write_Cmd(0x0c);    //开显示(无游标、不反白)
DelayUs2x(50);       //延时大于100us
Write_Cmd(0x01);    //清除显示，并且设定地址指针为00H
DelayMs(15);          //延时大于10ms
Write_Cmd(0x06);    //指定在资料的读取及写入时，设定游标的移动方向及指定显示的移位，光标从右向左加1位移动
DelayUs2x(50);       //延时大于100us
}
/*------------------------------------------------
               用户自定义字符
------------------------------------------------*/
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]);
   }
}

/*------------------------------------------------
               显示用户自定义字符
------------------------------------------------*/
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);

}
/*------------------------------------------------
            写入字符函数
------------------------------------------------*/
void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data)
{
if (y == 1)
{
Write_Cmd(0x80 + x);    //表示第一行
}
else if(y==2)
{
Write_Cmd(0x90 + x);    //表示第二行
}
else if(y==3)
{
Write_Cmd(0x88+x);    //表示第三行
}
else if(y==4)
{
Write_Cmd(0x98+x);    //表示第四行
}
Write_Data( Data);
}
/*------------------------------------------------
            写入字符串函数
------------------------------------------------*/
void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s)
{
if (y == 1)
{
Write_Cmd(0x80 + x);    //表示第一行
}
else if(y==2)
{
Write_Cmd(0x90 + x);    //表示第二行
}
else if(y==3)
{
Write_Cmd(0x88+x);    //表示第三行
}
else if(y==4)
{
Write_Cmd(0x98+x);    //表示第四行
}
while (*s)
{
Write_Data( *s);
s ++;
}
}
/*------------------------------------------------
               显示字符串
x:横坐标值，范围0~8
y:纵坐标值，范围1~4
------------------------------------------------*/
void LCD_PutString(unsigned char x,unsigned char y,unsigned char code *s)
{
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>0)
{
   Write_Data(*s);
   s++;
   DelayUs2x(50);
}
}
/*------------------------------------------------
                  清屏
------------------------------------------------*/
void ClrScreen()
{
Write_Cmd(0x01);
DelayMs(15);
}
/*------------------------------------------------
               显示图片
------------------------------------------------*/
void LCD_PutGraphic(unsigned char code *img)
{
int i,j;
//显示上半屏内容设置
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++;
   }
}
//显示下半屏内容设置
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++;
   }
}

}
/*------------------------------------------------
               设置到绘图模式
------------------------------------------------*/
void SetGraphicMode()
{
Write_Cmd(0x36);    //选择8bit数据流图形模式
DelayUs2x(20);

}
/*------------------------------------------------
                  18b20初始化
------------------------------------------------*/
bit Init_DS18B20(void)
{
bit dat=0;
DQ = 1;       //DQ复位
DelayUs2x(5); //稍做延时
DQ = 0;       //单片机将DQ拉低
DelayUs2x(200); //精确延时大于 480us 小于960us
DelayUs2x(200);
DQ = 1;       //拉高总线
DelayUs2x(50);  //15~60us 后接收60-240us的存在脉冲
dat=DQ;       //如果x=0则初始化成功, x=1则初始化失败
DelayUs2x(25);  //稍作延时返回
return dat;
}
bit Init_DS18B20_a(void)
{
bit dat=0;
DQ1 = 1; //DQ1复位
DelayUs2x(5); //稍做延时
DQ1 = 0;       //单片机将DQ1拉低
DelayUs2x(200); //精确延时大于 480us 小于960us
DelayUs2x(200);
DQ1 = 1;       //拉高总线
DelayUs2x(50); //15~60us 后接收60-240us的存在脉冲
dat=DQ1;       //如果x=0则初始化成功, x=1则初始化失败
DelayUs2x(25); //稍作延时返回
return dat;
}
bit Init_DS18B20_b(void)
{
bit dat=0;
DQ2 = 1; //DQ1复位
DelayUs2x(5); //稍做延时
DQ2 = 0;       //单片机将DQ1拉低
DelayUs2x(200); //精确延时大于 480us 小于960us
DelayUs2x(200);
DQ2 = 1;       //拉高总线
DelayUs2x(50); //15~60us 后接收60-240us的存在脉冲
dat=DQ2;       //如果x=0则初始化成功, x=1则初始化失败
DelayUs2x(25); //稍作延时返回
return dat;
}
/*------------------------------------------------
                  读取一个字节
------------------------------------------------*/
unsigned char ReadOneChar(void)
{
unsigned char i=0;
unsigned char dat = 0;
for (i=8;i>0;i--)
{
  DQ = 0; // 给脉冲信号
  dat>>=1;
  DQ = 1; // 给脉冲信号
  if(DQ)
dat|=0x80;
  DelayUs2x(25);
}
return(dat);
}
unsigned char ReadOneChar_a(void)
{
unsigned char i=0;
unsigned char dat = 0;
for (i=8;i>0;i--)
{
  DQ1 = 0; // 给脉冲信号
  dat>>=1;
  DQ1 = 1; // 给脉冲信号
  if(DQ1)
dat|=0x80;
  DelayUs2x(25);
}
return(dat);
}
unsigned char ReadOneChar_b(void)
{
unsigned char i=0;
unsigned char dat = 0;
for (i=8;i>0;i--)
{
  DQ2 = 0; // 给脉冲信号
  dat>>=1;
  DQ2 = 1; // 给脉冲信号
  if(DQ2)
dat|=0x80;
  DelayUs2x(25);
}
return(dat);
}
/*------------------------------------------------
                  写入一个字节
------------------------------------------------*/
void WriteOneChar(unsigned char dat)
{
unsigned char i=0;
for (i=8; i>0; i--)
{
  DQ = 0;
  DQ = dat&0x01;
  DelayUs2x(25);
  DQ = 1;
  dat>>=1;
}
DelayUs2x(25);
}
void WriteOneChar_a(unsigned char dat)
{
unsigned char i=0;
for (i=8; i>0; i--)
{
  DQ1 = 0;
  DQ1 = dat&0x01;
  DelayUs2x(25);
  DQ1 = 1;
  dat>>=1;
}
DelayUs2x(25);
}
void WriteOneChar_b(unsigned char dat)
{
unsigned char i=0;
for (i=8; i>0; i--)
{
  DQ2 = 0;
  DQ2 = dat&0x01;
  DelayUs2x(25);
  DQ2 = 1;
  dat>>=1;
}
DelayUs2x(25);
}
/*------------------------------------------------
                  读取温度
------------------------------------------------*/
unsigned int ReadTemperature(void)
{
unsigned char a=0;
unsigned int b=0;
unsigned int t=0;
Init_DS18B20();
WriteOneChar(0xCC); // 跳过读序号列号的操作
WriteOneChar(0x44); // 启动温度转换
DelayMs(10);
Init_DS18B20();
WriteOneChar(0xCC); //跳过读序号列号的操作
WriteOneChar(0xBE); //读取温度寄存器等（共可读9个寄存器）前两个就是温度
a=ReadOneChar(); //低位
b=ReadOneChar(); //高位

b<<=8;
t=a+b;

return(t);
}
unsigned int ReadTemperature_a(void)
{
unsigned char a=0;
unsigned int b=0;
unsigned int t=0;
Init_DS18B20_a();
WriteOneChar_a(0xCC); // 跳过读序号列号的操作
WriteOneChar_a(0x44); // 启动温度转换
DelayMs(10);
Init_DS18B20_a();
WriteOneChar_a(0xCC); //跳过读序号列号的操作
WriteOneChar_a(0xBE); //读取温度寄存器等（共可读9个寄存器）前两个就是温度
a=ReadOneChar_a(); //低位
b=ReadOneChar_a(); //高位

b<<=8;
t=a+b;

return(t);
}
unsigned int ReadTemperature_b(void)
{
unsigned char a=0;
unsigned int b=0;
unsigned int t=0;
Init_DS18B20_b();
WriteOneChar_b(0xCC); // 跳过读序号列号的操作
WriteOneChar_b(0x44); // 启动温度转换
DelayMs(10);
Init_DS18B20_b();
WriteOneChar_b(0xCC); //跳过读序号列号的操作
WriteOneChar_b(0xBE); //读取温度寄存器等（共可读9个寄存器）前两个就是温度
a=ReadOneChar_b(); //低位
b=ReadOneChar_b(); //高位

b<<=8;
t=a+b;

return(t);
}

/*------------------------------------------------
            串口通讯初始化
------------------------------------------------*/
void UART_Init(void)
{
SCON  = 0x50;          // SCON: 模式 1, 8-bit UART, 使能接收
TMOD |= 0x20;             // TMOD: timer 1, mode 2, 8-bit 重装
TH1 = 0xFD;             // TH1:  重装值 9600 波特率晶振 11.0592MHz
TR1 = 1;                // TR1:  timer 1 打开
//EA = 1;                //打开总中断
//ES = 1;                //打开串口中断
TI=1;
}
/*------------------------------------------------
               调用显示更新1
------------------------------------------------*/
void DisplayUpdata(void)
{
unsigned char num;
ClrScreen();
num=sizeof(MainMenu)/sizeof(MainMenu[0]);//判断数组中数值个数
if((0+(curr/4)*4)    {
   LCD_PutString(0,2,MainMenu[0+(curr/4)*4]);
   LCD_PutString(0,1,"----功能选择---- ");
   LCD_PutString(0,4,"---------------- ");

   }
else //如果超出数组最大元素，则写空信息，不判断此信息可能会出现乱码
   LCD_PutString(0,2,"");
if((1+(curr/4)*4) {
LCD_PutString(0,3,MainMenu[1+(curr/4)*4]);
      LCD_PutString(0,1,"----功能选择---- ");
LCD_PutString(0,4,"---------------- ");

}
else
   LCD_PutString(0,3,"");
// if((2+(curr/4)*4) //    {
//      LCD_PutString(0,4,MainMenu[2+(curr/4)*4]);
//       LCD_PutString(0,1,"----模式选择---- ");
//
// }
// else
//    LCD_PutString(0,4,"");
// if((3+(curr/4)*4) //    LCD_PutString(0,4,MainMenu[3+(curr/4)*4]);
// else
//    LCD_PutString(0,4,"");
DisplayCGRAM(0,curr%4+1);
}

/*------------------------------------------------
                  按键选择函数
------------------------------------------------*/
void keyscan()
{
if(curr!=currold) //光标位置变化，则更新显示
{
      DisplayUpdata();
currold=curr;
}
if(k2==0)
{
DelayMs(10);
if(k2==0)
{
   red=0;
   green=0;
   curr=1;
   TR0=0;
   k5num=0;
   CGRAM();    //写入自定义字符
   DisplayUpdata();
   LCD_PutString(0,1,"----功能选择---- ");
   LCD_PutString(0,4,"---------------- ");
   flag=1;
        while(!k2);
}
}
   if(k3==0&&flag==1)    //如果检测到低电平，说明按键按下
{
DelayMs(10); //延时去抖，一般10-20ms
if(k3==0)    //再次确认按键是否按下，没有按下则退出
      {

while(!k3);//如果确认按下按键等待按键释放，没有释放则一直等待
if(curr {
    curr++;
k5num=0;
red=0;
                  }
      }
}
   if(k4==0&&flag==1)  //如果检测到低电平，说明按键按下
{
     DelayMs(10); //延时去抖，一般10-20ms
     if(k4==0)    //再次确认按键是否按下，没有按下则退出
   {
        while(!k4);//如果确认按下按键等待按键释放，没有释放则一直等待
            if(curr>1)
         {
      curr--;
k5num=0;
red=0;
                  }
                  }
         }
if(k1==0&&curr==1)
{
DelayMs(10);
if(k1==0)
{
red=0;
green=0;
TR0=1;
k5num=0;
ReadTempFlag=1;
flag=0;
Write_Cmd(0x0c);
ClrScreen();
LCD_PutString(0,1,"温度");
   LCD_PutString(3,1,"最高");
LCD_PutString(6,1,"最低");
LCD_PutString(2,2,"C");
LCD_PutString(2,3,"C");
LCD_PutString(2,4,"C");
// sprintf(displaytemp," %3d %3d",tempH,tempL);
//             LCD_Write_String(3,2,displaytemp);//显示第二行
ReadTempFlag=0;
while(!k1);

   }
}

   if(k5==0&&flag==0)    //选择温度调节光标显示
{
DelayMs(50);
if(k5==0)
{
k5num++;
while(!k5);
if(k5num==1)
{
TR0=0;
Write_Cmd(0x94);
Write_Cmd(0x0f);

}
if(k5num==2)
{
Write_Cmd(0x97);
Write_Cmd(0x0f);
}
if(k5num==3)
{
Write_Cmd(0x8c);
Write_Cmd(0x0f);

}
if(k5num==4)
{
Write_Cmd(0x8f);
Write_Cmd(0x0f);

}
   if(k5num==5)
{
Write_Cmd(0x9c);
Write_Cmd(0x0f);

}
if(k5num==6)
{
Write_Cmd(0x9f);
Write_Cmd(0x0f);

}
if(k5num==7)
{
k5num=0;
Write_Cmd(0x0c);
TR0=0;
}
}
}
if(k4==0&&k5num==1)    //第一路温度上限增加
{
DelayMs(10);
if(k4==0&&k5num==1)
{
tempH++;
if(tempH==126)
tempH=-55;
sprintf(displaytemp," %3d %3d",tempH,tempL);
LCD_Write_String(3,2,displaytemp);
Write_Cmd(0x94);
Write_Cmd(0x0f);
while(!k4);
}
}
   if(k3==0&&k5num==1) //第一路温度上限减小
{
DelayMs(10);
if(k3==0&&k5num==1)
{
tempH--;
if(tempH==-55)
tempH=126;
sprintf(displaytemp," %3d %3d",tempH,tempL);
LCD_Write_String(3,2,displaytemp);
Write_Cmd(0x94);
Write_Cmd(0x0f);
while(!k3);
}
}
   if(k4==0&&k5num==2)    //第一路温度下限增加
{
DelayMs(100);
if(k4==0&&k5num==2)
{
tempL++;
if(tempL==126)
tempL=-55;
sprintf(displaytemp," %3d %3d",tempH,tempL);
LCD_Write_String(3,2,displaytemp);
Write_Cmd(0x97);
Write_Cmd(0x0f);
while(!k4);
}
}
if(k3==0&&k5num==2) //第一路温度下限减小
{
DelayMs(100);
if(k3==0&&k5num==2)
{
tempL--;
if(tempL==-55)
tempL=126;
sprintf(displaytemp," %3d %3d ",tempH,tempL);
LCD_Write_String(3,2,displaytemp);
Write_Cmd(0x97);
Write_Cmd(0x0f);
while(!k4);
}
}

if(k4==0&&k5num==3)    //第二路温度上限增加
{
DelayMs(10);
if(k4==0&&k5num==3)
{
tempH1++;
if(tempH1==126)
tempH1=-55;
sprintf(displaytemp," %3d %3d",tempH1,tempL1);
LCD_Write_String(3,3,displaytemp);
Write_Cmd(0x8c);
Write_Cmd(0x0f);
while(!k4);
}
}
if(k3==0&&k5num==3) //第二路温度上限减小
{
DelayMs(10);
if(k3==0&&k5num==3)
{
tempH1--;
if(tempH1==-55)
tempH1=126;
sprintf(displaytemp," %3d %3d",tempH1,tempL1);
LCD_Write_String(3,3,displaytemp);
Write_Cmd(0x8c);
Write_Cmd(0x0f);
while(!k3);
}
}
if(k4==0&&k5num==4)    //第二路温度下限增加
{
DelayMs(100);
if(k4==0&&k5num==4)
{
tempL1++;
if(tempL1==126)
tempL1=-55;
sprintf(displaytemp," %3d %3d",tempH1,tempL1);
LCD_Write_String(3,3,displaytemp);
Write_Cmd(0x8f);
Write_Cmd(0x0f);
while(!k4);
}
}
if(k3==0&&k5num==4) //第二路温度下限减小
{
DelayMs(100);
if(k3==0&&k5num==4)
{
tempL2--;
if(tempL2==-55)
tempL2=126;
sprintf(displaytemp," %3d %3d ",tempH2,tempL2);
LCD_Write_String(3,3,displaytemp);
Write_Cmd(0x8f);
Write_Cmd(0x0f);
while(!k3);
}
}
   if(k4==0&&k5num==5)    //第三路温度上限增加
{
DelayMs(10);
if(k4==0&&k5num==5)
{
tempH2++;
if(tempH2==126)
tempH1=-55;
sprintf(displaytemp," %3d %3d",tempH2,tempL2);
LCD_Write_String(3,4,displaytemp);
Write_Cmd(0x9c);
Write_Cmd(0x0f);
while(!k4);
}
}
   if(k3==0&&k5num==5) //第三路温度上限减小
{
DelayMs(10);
if(k3==0&&k5num==5)
{
tempH2--;
if(tempH2==-55)
tempH2=126;
sprintf(displaytemp," %3d %3d",tempH2,tempL2);
LCD_Write_String(3,4,displaytemp);
Write_Cmd(0x9c);
Write_Cmd(0x0f);
while(!k3);
}
}
if(k4==0&&k5num==6)    //第三路温度下限增加
{
DelayMs(100);
if(k4==0&&k5num==6)
{
tempL2++;
if(tempL2==126)
tempL2=-55;
sprintf(displaytemp," %3d %3d",tempH2,tempL2);
LCD_Write_String(3,4,displaytemp);
Write_Cmd(0x9f);
Write_Cmd(0x0f);
while(!k4);
}
}
if(k3==0&&k5num==6) //第二路温度下限减小
{
DelayMs(100);
if(k3==0&&k5num==6)
{
tempL2--;
if(tempL2==-55)
tempL2=126;
sprintf(displaytemp," %3d %3d ",tempH2,tempL2);
LCD_Write_String(3,4,displaytemp);
Write_Cmd(0x9f);
Write_Cmd(0x0f);
while(!k3);
}
}
if(k1==0&&curr==2)
{
DelayMs(10);
if(k1==0)
{
TR1=1;
ReadTempFlag=0;
red=0;
green=0;
      flag=0;
flag1=1;
k5num=15;
ClrScreen();
LCD_PutString(0,1,"----方波显示----");
LCD_PutString(0,2,"");
   LCD_PutString(0,3,"频率f=       Hz");
LCD_PutString(0,4,"----------------");
while(!k1);

   }
}




}
/*------------------------------------------------
                  主函数
------------------------------------------------*/
void main (void)
{

CGRAM();    //写入自定义字符
Init_ST7920(); //初始化
Init_Timer();
DelayMs(20);       //延时有助于稳定
ClrScreen();    //清屏
UART_Init();
LCD_PutString(0,3," MCU Design  ");

// LCD_PutString(0,4,"****功能菜单****");
SetGraphicMode();    //设置成绘图模式
LCD_PutGraphic(pic1); //调入一副图
TR0=0;
tempH=30;
tempH1=30;
tempH2=30;
tempL=20;
tempL1=20;
tempL2=20;
squ=0;
beep=0;
// ReadTempFlag=1;
while (1)       //主循环
  {
if(ReadTempFlag==1)
   {
   ReadTempFlag=0;
   temp=ReadTemperature();
   temperature=(float)temp*0.0625;
   sprintf(displaytemp,"%4.1f",temperature);    //打印第一路温度值
   LCD_Write_String(0,2,displaytemp);          //显示第二行
   sprintf(displaytemp," %3d %3d",tempH,tempL); //显示第一路上下限温度值
            LCD_Write_String(3,2,displaytemp);          //显示第二行

   temp=ReadTemperature_a();
   temperature=(float)temp*0.0625;
   sprintf(displaytemp,"%4.1f",temperature);       //打印第二路温度值
   LCD_Write_String(0,3,displaytemp);             //显示第三行
   sprintf(displaytemp," %3d %3d",tempH1,tempL1); //显示第二路上下限温度值
            LCD_Write_String(3,3,displaytemp);             //显示第三行

   temp=ReadTemperature_b();
   temperature=(float)temp*0.0625;
   sprintf(displaytemp,"%4.1f",temperature);       //打印第三路温度值
   LCD_Write_String(0,4,displaytemp);             //显示第四行
   sprintf(displaytemp," %3d %3d",tempH2,tempL2); //显示第三路上下限温度值
            LCD_Write_String(3,4,displaytemp);             //显示第四行
   }
keyscan();

}

}

/*------------------------------------------------
                  定时器初始化子程序
------------------------------------------------*/
void Init_Timer(void)
{
   TMOD|= 0x11;    //使用模式1，16位定时器，使用"|"符号可以在使用多个定时器时不受影响
   TH0=(65536-50000)/256;
   TL0=(65536-50000)%256;
   TH1=(65536-50000)/256;
   TL1=(65536-50000)%256;
   EA=1;          //总中断打开
   ET0=1;          //定时器中断打开
   ET1=1;
   TR1=1;
   TR0=1;          //定时器开关打开

}
/*------------------------------------------------
               定时器0中断子程序
------------------------------------------------*/
void T0_time() interrupt 1
{
   static unsigned int num;
   TH0=(65536-50000)/256;
   TL0=(65536-50000)%256;
   num++;
   if(num==10)
   {
      num=0;
      ReadTempFlag=1; //读标志位置1
   }
}
/*------------------------------------------------
               定时器1中断子程序
------------------------------------------------*/
void T1_time() interrupt 3
{
   static unsigned int num1;
   TH1=(65536-50000)/256;
   TL1=(65536-50000)%256;
   num1++;
   if(num1==100)
   {
     num1=0;
squ=~squ;
   }
}

为什么这两个定时器不能同时工作？？？一直找不出原因，希望有大神可以帮个忙！！！非常感谢。