Question

keil 51单片机 怎么把a1=0,a2=1,a3=1,a4=0合并成a=0110.

Answer 1

如下即可：

#include

sbita0 = P2^2;

sbita1 = P2^6;

sbita2 = P1^5;

sbita3 = P3^4;

charbdatabb;

sbitb0 = bb^0;

sbitb1 = bb^1;

sbitb2 = bb^2;

sbitb3 = bb^3;

void main()

{

while(1){

bb = 0;

b0 = a0;

b1 = a1;

b2 = a2;

b3 = a3;

switch(bb)x05{

case 0x01: P0 = 0xC0; break;//显示0

case 0x02: P0 = 0xF9; break;//1

case 0x04: P0 = 0xA4; break;//2

case 0x08: P0 = 0xB0; break;//3

case 0x03: P0 = 0x99; break;//4

case 0x06: P0 = 0x92; break;//5

case 0x0C: P0 = 0x82; break;//6

case 0x09: P0 = 0xF8; break;//7

default:P0 = 0x8E;//F

}

}

}

仿真运行如下：