單片機與PC機串行通信

參考文獻[1]張毅剛，劉杰.MCS-51單片機原理及應用［M］.哈爾濱：哈爾濱工業(yè)大學出版社，2008[2]張義和.例說51單片機：C語言版［M］.北京：人民郵電出版社，2010[3]段晨東，爨瑩.單片機原理及接口技術［M］.北京：清華大學出版社，2008[4]偉福Lab8000系列單片機仿真實驗系統(tǒng)使用說明書［M］.南京偉福實業(yè)有限公司，2015[5]高峰.單片微型計算機原理與接口技術［M］.北京：科學出版社，2007沈陽航空航天大學課程設計報告附錄（關鍵部分程序清單）#include<reg51.h>#include<intrins.h>#defineucharunsignedchar#defineuintunsignedintxdataucharkey_at_0x8001;//定義鍵盤行地址xdataucharled_at_0x8002;//定義鍵盤列地址并定義段碼顯示所在列xdatauchardat_at_0x8004;//定義段碼輸出地址ucharascii[]={48,49,50,51,52,53,54,55,56,57,0x41,0x42,0x43,0x44,0x45,0x46};ucharledmap[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};uintk1;ucharflag;uchartemp;voidpcsend();voidkeysend();inti,j,p;unsignedchartestkey()//數(shù)碼管顯示函數(shù){led=0;return(~key&0x0f);}uintgetkey()//鍵盤掃描函數(shù){uintk;led=0xfb;//掃描左數(shù)第四列switch(key){case0x0e:k=13;while(testkey());return(k);//下數(shù)第一行dcase0x0d:k=12;while(testkey());return(k);//下數(shù)第二行ccase0x0b:k=11;while(testkey());return(k);//下數(shù)第三行bcase0x07:k=10;while(testkey());return(k);//下數(shù)第四行adefault:break;}led=0xf7;//掃描左數(shù)第三列switch(key){case0x0e:k=14;while(testkey());return(k);case0x0d:k=3;while(testkey());return(k);case0x0b:k=6;while(testkey());return(k);case0x07:k=9;while(testkey());return(k);default:break;}led=0xef;//掃描左數(shù)第二列switch(key){case0x0e:k=15;while(testkey());return(k);case0x0d:k=2;while(testkey());return(k);case0x0b:k=5;while(testkey());return(k);case0x07:k=8;while(testkey());return(k);default:break;}led=0xdf;//掃描左數(shù)第一列switch(key){case0x0e:k=0;while(testkey());return(k);case0x0d:k=1;while(testkey());return(k);case0x0b:k=4;while(testkey());return(k);case0x07:k=7;while(testkey());return(k);default:break;}led=0xfe;switch(key){case0x0e:k=100;while(testkey());return(k);default:return(-1);break;}}voidmain()//主函數(shù){TMOD=0x20;//設置定時器工作方式和初值TH1=0xF3;TL1=0xF3;SCON=0x50;PCON=0x80;while(1){k1=getkey();led=2;flag=0;dat=ledmap[k1];if(k1==1||k1==2){switch(k1){case1:pcsend();IE=0x00;k1=0;break;case2:keysend();k1=0;break;}}}}voidpcsend()//PC發(fā)送函數(shù){TR1=1;IE=0x90;while(!flag);}voidkeysend()//小鍵盤發(fā)送函數(shù){uintkk=0;ucharknum;TR1=1;kk=getkey();while(kk!=100){kk=getkey();if(kk==-1)continue;led=2;knum=ascii[kk];SBUF=knum;while(!TI);TI=0;}}voidInt1()interrupt4//串行口中斷函數(shù){