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標題:
單片機電子溫度計溫度設置上下限只能整數，能修改代碼可以帶小數嗎？
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作者:
lotus666
時間:
2020-3-22 15:27
標題:
單片機電子溫度計溫度設置上下限只能整數，能修改代碼可以帶小數嗎？
void write_1602com(uchar com)//****液晶寫入指令函數****
{
RS=0;//數據/指令選擇置為指令
RW=0; //讀寫選擇置為寫
LCD1602=com;//送入數據
delay(1);
EN=1;//拉高使能端，為制造有效的下降沿做準備
delay(1);
EN=0;//en由高變低，產生下降沿，液晶執行命令
}
void write_1602dat(uchar dat)//***液晶寫入數據函數****
{
RS=1;//數據/指令選擇置為數據
RW=0; //讀寫選擇置為寫
LCD1602=dat;//送入數據
delay(1);
EN=1; //en置高電平，為制造下降沿做準備
delay(1);
EN=0; //en由高變低，產生下降沿，液晶執行命令
}
void lcd_init()//***液晶初始化函數****
{
uchar a;
write_1602com(0x38);//設置液晶工作模式，意思：16*2行顯示，5*7點陣，8位數據
write_1602com(0x0c);//開顯示不顯示光標
write_1602com(0x06);//整屏不移動，光標自動右移
write_1602com(0x01);//清顯示
write_1602com(0x80);//日歷顯示固定符號從第一行第1個位置之后開始顯示
for(a=0;a<16;a++)
{
write_1602dat(tab1[a]);//向液晶屏寫日歷顯示的固定符號部分
delay(3);
}
write_1602com(0x80+0x40);//時間顯示固定符號寫入位置，從第2個位置后開始顯示
for(a=0;a<16;a++)
{
write_1602dat(tab2[a]);//寫顯示時間固定符號，兩個冒號
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);
}
}
//=====================================================================================
/*****初始化定時器0*****/
void InitTimer(void)
{
TMOD=0x1;
TH0=0x3c;
TL0=0xb0; //50ms（晶振12M）
EA=1; //全局中斷開關
TR0=1;
ET0=1; //開啟定時器0
}
void KEY()
{
//功能鍵
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);
}
//減少
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);
}
//減少
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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