单片机电子温度计温度设置上下限只能整数，能修改代码可以带小数吗？

ID:688956 · 发表于 2020-3-22 15:27

void write_1602com(uchar com)//****液晶写入指令函数****
{
RS=0;//数据/指令选择置为指令
RW=0; //读写选择置为写
LCD1602=com;//送入数据
delay(1);
EN=1;//拉高使能端，为制造有效的下降沿做准备
delay(1);
EN=0;//en由高变低，产生下降沿，液晶执行命令
}

void write_1602dat(uchar dat)//***液晶写入数据函数****
{
RS=1;//数据/指令选择置为数据
RW=0; //读写选择置为写
LCD1602=dat;//送入数据
delay(1);
EN=1; //en置高电平，为制造下降沿做准备
delay(1);
EN=0; //en由高变低，产生下降沿，液晶执行命令
}

void lcd_init()//***液晶初始化函数****
{
uchar a;
write_1602com(0x38);//设置液晶工作模式，意思：16*2行显示，5*7点阵，8位数据
write_1602com(0x0c);//开显示不显示光标
write_1602com(0x06);//整屏不移动，光标自动右移
write_1602com(0x01);//清显示

write_1602com(0x80);//日历显示固定符号从第一行第1个位置之后开始显示
for(a=0;a<16;a++)
{
write_1602dat(tab1[a]);//向液晶屏写日历显示的固定符号部分
delay(3);
}
write_1602com(0x80+0x40);//时间显示固定符号写入位置，从第2个位置后开始显示
for(a=0;a<16;a++)
{
write_1602dat(tab2[a]);//写显示时间固定符号，两个冒号
delay(3);
}

}

void display()
{
if(Mode==0)
{
write_1602com(0x80+8);
write_1602dat(c/1000+0x30);
write_1602dat((c%1000)/100+0x30);
write_1602dat(((c%1000)%100)/10+0x30);
write_1602com(0x80+12);
write_1602dat(((c%1000)%100)%10+0x30);
write_1602com(0x80+13);
write_1602dat(0xdf);
write_1602com(0x80+0x40+3);
write_1602dat(TH/10+0x30);
write_1602dat(TH%10+0x30);
write_1602dat(0xdf);
write_1602com(0x80+0x40+12);
write_1602dat(TL/10+0x30);
write_1602dat(TL%10+0x30);
write_1602dat(0xdf);
}
}
//=====================================================================================

/*****初始化定时器0*****/
void InitTimer(void)
{
TMOD=0x1;
TH0=0x3c;
TL0=0xb0;    //50ms（晶振12M）
EA=1;    //全局中断开关
TR0=1;
ET0=1;    //开启定时器0
}

void KEY()
{
//功能键
if(SET==0)
{
delay(10);
if(SET==0)
{
BUZZ=0;
Mode++;
if(Mode>=3)
{
Mode=0;
write_eeprom();
}
delay(50);
BUZZ=1;
}
while(SET==0)
{
if(Mode==0)
{
// write_1602com(0x80+0x40+6);
write_1602com(0x0c);
}
else if(Mode==1)
{
write_1602com(0x80+0x40+4);
write_1602com(0x0f);
}
else
{
write_1602com(0x80+0x40+13);
write_1602com(0x0f);
}
}
}
//增加
if(ADD==0&&Mode==1)
{
delay(10);
if(ADD==0)
{
TH++;
if(TH>=99)
TH=99;
write_1602com(0x80+0x40+3);
write_1602dat(TH/10+0x30);
write_1602dat(TH%10+0x30);
write_1602com(0x80+0x40+4);
BUZZ=0;
delay(50);
BUZZ=1;
}
while(ADD==0);
}
//减少
if(DEC==0&&Mode==1)
{
delay(10);
if(DEC==0)
{
TH--;
if(TH==TL)
TH=TL+1;
write_1602com(0x80+0x40+3);
write_1602dat(TH/10+0x30);
write_1602dat(TH%10+0x30);
write_1602com(0x80+0x40+4);
BUZZ=0;
delay(50);
BUZZ=1;
}
while(DEC==0);
}
if(ADD==0&&Mode==2)
{
delay(10);
if(ADD==0)
{
TL++;
if(TL==TH)
TL=TH-1;
write_1602com(0x80+0x40+12);
write_1602dat(TL/10+0x30);
write_1602dat(TL%10+0x30);
write_1602com(0x80+0x40+13);
BUZZ=0;
delay(50);
BUZZ=1;
}
while(ADD==0);

}
//减少
if(DEC==0&&Mode==2)
{
delay(10);
if(DEC==0)
{
TL--;
if(TL<=0)
TL=0;
write_1602com(0x80+0x40+12);
write_1602dat(TL/10+0x30);
write_1602dat(TL%10+0x30);
write_1602com(0x80+0x40+13);
BUZZ=0;
delay(50);
BUZZ=1;
}
while(DEC==0);
}
}

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