44矩阵键盘DS18B20显示

#include<reg52.h> #include<intrins.h> #define uchar unsigned char #define uint unsigned int sbit H1=P1^0; sbit H2=P1^1; sbit H3=P1^2; sbit H4=P1^3; sbit L1=P1^4; sbit L2=P1^5; sbit L3=P1^6; sbit L4=P1^7; uchar keynum1=0; uchar a=0; bit keyflag=0; bit keyscan(); char keynumscan(uchar key); void delay(); uchar code distable[]={0x28,0x0eb,0x32,0x0a2,0x0e1,0x0a4,0x24,0x0ea,0x20,0x0a0,0x25,0x83,0x0c6,0x0a1,0x86,0x8e}; void main() { TMOD=0x01; TH0=(65536-10000)/256; TL0=(65536-10000)%256; EA=1; ET0=1; TR0=1; while(1) { if(keyflag) { keyflag=0; if(a=(keynumscan(0xfe))) keynum1=a-0x01; else if(a=(keynumscan(0xfd))) keynum1=a+0x03; else if(a=(keynumscan(0xfb))) keynum1=a+0x07; else if(a=(keynumscan(0xf7))) keynum1=a+0x0b; else ; TR0=1; } P2=0x7f; P1=keynum1; P0=distable[keynum1]; } } bit keyscan() { uchar temp; P1=0xf0; temp=P1; if(temp!=0xf0) { delay(); if(temp!=0xf0) // keyflag=1; return 1; } else { //P1=0xff; //keyflag=0; return 0; } } char keynumscan(uchar key) { uchar temp,keynum; P1=key; temp=P1; if(temp!=key) { if(!L1) keynum=0x01; else if(!L2) keynum=0x02; else if(!L3) keynum=0x03; else keynum=0x04; P1=key; temp=P1; while(temp!=key) { P1=key; temp=P1; } return keynum; } else { //P1=0xff; return(0); } } void delay() { uchar x,y; for(x=10;x>0;x--) for(y=110;y>0;y--); } void timer0() interrupt 1 using 0 { TR0=0; TH0=(65536-10000)/256; TL0=(65536-10000)%256; if(keyscan()) keyflag=1; else { keyflag=0; TR0=1; } }