独立按键+静态数码管.rar

#include <reg52.h> #include <intrins.h> sbit hc138_A=P2^5; sbit hc138_B=P2^6; sbit hc138_C=P2^7; sbit s4 = P3^3; sbit s5 = P3^2; sbit s6 = P3^1; sbit s7 = P3^0; unsigned char shuzi[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; unsigned char key_value = 0; void HC138(unsigned int n) { switch(n) { case 4: hc138_A=0 ; hc138_B=0 ; hc138_C=1; break; case 5: hc138_A=1 ; hc138_B=0 ; hc138_C=1; break; case 6: hc138_A=0 ; hc138_B=1 ; hc138_C=1; break; case 7: hc138_A=1 ; hc138_B=1 ; hc138_C=1; break; } } void delay(unsigned int k) { while(k--); } void key_scan() { if(s4 == 0) { delay(100); if(s4 == 0) { while(s4 == 0); key_value = 4; } } if(s5 == 0) { delay(100); if(s5 == 0) { while(s5 == 0); key_value = 5; } } if(s6 == 0) { delay(100); if(s6 == 0) { while(s6 == 0); key_value = 6; } } if(s7 == 0) { delay(100); if(s7 == 0) { while(s7 == 0); key_value = 7; } } } void shumaguan() { HC138(6); P0 = 0x00; HC138(7); P0 = shuzi[key_value]; } void main() { HC138(5); P0 = 0x00; HC138(4); P0 = 0xff; while(1) { key_scan(); shumaguan(); } }