display_led.h

利用keil 51实现温湿度模块的控制程序

 void display_led(float p)
{uchar code table[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
uchar code table_dot[10]={0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10};
uint t,t1,t2,t3,t4;
p=p*100;
t=(uint)(p);
t1=t%10;t2=(t/10)%10;t3=(t/100)%10;t4=(t/1000)%10;//依次得到各位（低到高）
P0=table[t4];
P2_0=1;P2_1=0;P2_2=0;P2_3=0;
 delay5ms();
P0=table_dot[t3];
P2_0=0;P2_1=1;P2_2=0;P2_3=0;
delay5ms();
P0=table_dot[t2];
P2_0=0;P2_1=0;P2_2=1;P2_3=0;
delay5ms();
P0=table[t1];
P2_0=0;P2_1=0;P2_2=0;P2_3=1;}