實(shí)驗(yàn)七 串行通信實(shí)驗(yàn)

第10頁(yè)共10頁(yè)實(shí)驗(yàn)七串行通信實(shí)驗(yàn)一、實(shí)驗(yàn)?zāi)康恼莆諏?shí)現(xiàn)串行通信的基本方法；掌握鍵盤(pán)按鍵控制的串行通信實(shí)現(xiàn)方法； 掌握定時(shí)控制的串行通信實(shí)現(xiàn)方法。根據(jù)已知電路和設(shè)計(jì)要求在PROTEUS平臺(tái)仿真實(shí)現(xiàn)通信系統(tǒng)。INC78HEND2:MOVA,76HCJNEA,78H,RETNMOVA,75HCJNEA,77H,RETNCLRESCLREASETB7FHSJMPRETN五、實(shí)驗(yàn)過(guò)程中遇到的主要問(wèn)題equ08002h;位控制口equ08004h;段控制口equ08001h;鍵盤(pán)讀入口20h.0;接收標(biāo)志位40h;顯示緩沖50H;接收緩沖ORG0000H;串行口中斷程序ORG0023HJNBTI,S0_RCLRTINOPS0_RETS0_R:;接收數(shù)據(jù)CLRRI;保存數(shù)據(jù)HasRcv;提示收到數(shù)據(jù)NOPRETILEDMAP:;八段管顯示碼db3fh,06h,5bh,4fh,66h,6dh,7dh,07hdb7fh,6fh,77h,7ch,39h,5eh,79h,71h;延時(shí)子程序movr7,#0DelayLoop:djnzr7,DelayLoopdjnzr6,DelayLoopretDisplayLED:movr0,#LEDBufmovr1,#6;共6個(gè)八段管movr2,#00100000b;從左邊開(kāi)始顯示Loop:movdptr,#OUTBITmova,#0movx@dptr,a;關(guān)所有八段管mova,@r0movdptr,#OUTSEGmovxmovdptr,#OUTBITmova,r2movx@dptr,a;顯示一位八段管movr6,#1Delaymov;顯示下一位rramovr2,aincr0djnzr1,Loopretmovdptr,#OUTBITmova,#0movx;輸出線(xiàn)置為0movmovx;讀入鍵狀態(tài)cplaanl;高四位不用ret;鍵碼定義db16h,15h,14h,0ffhdbdb0dh,0ch,0bh,0ahdb0eh,03h,06h,09hdb0fh,02h,05h,08hdb00h,01h,04h,07hGetKey:movmovP2,dphmovr0,#Low(IN)movr1,#00100000bmovr2,#6KLoop:mova,r1;找出鍵所在列cplamovxcplaamovr1,a;下一列movxa,@r0cplaanla,#0fhjnzGoon1;該列有鍵入djnzr2,KLoopmov;沒(méi)有鍵按下,返回sjmpExitGoon1:movr1,a;鍵值列行mova,r2arlarlamovr2,a;r2=(r2-1)*4mova,r1;r1中為讀入的行值movr1,#4LoopC:rrc;移位找出所在行jcExitincr2行值djnzr1,LoopCmova,r2;取出鍵碼movmovca,@a+dptrmovr2,amov;等鍵釋放amovxmovr6,#10callDelaycalljnzmova,r2retMOV#60HMOV#0;DISABLEALLINTERRUPTMOVTMOD,#020H;定時(shí)器1工作于方式2(8位重裝MOVTH1,#0F3H;波特率?2400BPS@12MHzMOVTL1,#0F3HPCON,#07FH;SMOD位清零PCON,#80hMOVSCON,#050H;串行口工作方式設(shè)置MOV;顯示8.8.8.8.movLEDBuf+1,#0ffhmovLEDBuf+2,#0ffhmovmovLEDBuf+4,#0movLEDBuf+5,#0SETBTR1SETBESSETBEA;movsbuf,a;jnbti,$MLoop:jb;收到數(shù)據(jù)？callDisplayLED;顯示call;有鍵入?jzMLoop;無(wú)鍵入,繼續(xù)顯示call;讀入鍵碼anla,#0fh;通訊口輸出鍵碼MLoopRcvData:clrHasRcv;是mova,RcvBuf;顯示數(shù)據(jù)movb,aanla,#0fh;顯示低位movdptr,#LEDMapmovca,@a+dptrmovL