基于at89c51秒表-課程設(shè)計(jì)

南開大學(xué)濱海學(xué)院微控制器原理及應(yīng)用實(shí)驗(yàn)課程設(shè)計(jì)（論文）題目：基于AT89C51的秒表學(xué)號：__11990624___姓名：___袁賀鵬______年級：___2011級___專業(yè)：通信工程系別：___電子科學(xué)系______指導(dǎo)教師：__高藝司敏山趙二剛_完成日期：___2013年12月_________功能描述：該單片機(jī)通過單片機(jī)的內(nèi)部中斷實(shí)現(xiàn)簡單的秒表計(jì)時(shí)功能。從而實(shí)現(xiàn)時(shí)間計(jì)量的問題。原理概述：通過單片機(jī)的內(nèi)部程序?qū)崿F(xiàn)一個(gè)端口接開關(guān)，其余端口接數(shù)碼管，實(shí)現(xiàn)計(jì)時(shí)功能。端口說明：單片機(jī)P1口接8位數(shù)碼管的段碼，單片機(jī)的P2.0到P2.7接數(shù)碼管的位碼選擇端。單片機(jī)int0，int1中斷，接兩個(gè)按鍵。該單片機(jī)復(fù)位為高電平復(fù)位。效果顯示總電路圖：程序清單LEDBUFEQU30H ;為顯示數(shù)據(jù)開辟內(nèi)存單元ORG0000HLJMPMAINORG0003HLJMPINTRUPER0ORG000BHLJMPTIME0ORG0013HLJMPINTRUPER1ORG001BHLJMPTIME1ORG0030HTABLE:DB0C0H,0F9H,0A4H,0B0H,99HDB92H,82H,0F8H,80H,90H ;7段數(shù)碼管譯碼表 DB3FHMAIN:MOVSP,#70H ;初始化堆棧MOVLEDBUF,#0 MOVLEDBUF+1,#0 MOVLEDBUF+2,#0AH MOVLEDBUF+3,#0 MOVLEDBUF+4,#0 MOVLEDBUF+5,#0AH MOVLEDBUF+6,#0 MOVLEDBUF+7,#0 ;寫入要顯示的數(shù)字MOVR0,#LEDBUF ;將ledbuf的首地址給R0MOVDPTR,#TABLE ;將TABLE的首是址給DPTR MOVR7,#0AH MOVR6,#0AH MOVR5,#0AH MOVR4,#06H MOVR3,#0AH MOVR2,#08H ;R2作為循環(huán)次數(shù)寄存器 MOVR1,#01H ;R1中放片選信號MOVTMOD,#51H ;定時(shí)器0工作在方式1 MOVTH0,#0EFH MOVTL0,#0FFH MOVTH1,#0D8H MOVTL1,#0F0H ;初始代定時(shí)器0 SETBTR0 SETBTR1 ;開定時(shí)器0 SETBEA ;開總中斷 SETBET0 SETBET1 SETBEX0 SETBEX1 ;開定時(shí)器0中斷 MAIN1:JBP3.0,STARTSJMPMAIN1START:MOVLEDBUF,#0 MOVLEDBUF+1,#0 MOVLEDBUF+2,#0AH MOVLEDBUF+3,#0 MOVLEDBUF+4,#0 MOVLEDBUF+5,#0AH MOVLEDBUF+6,#0 MOVLEDBUF+7,#0 SJMPMAIN1 ;動態(tài)停機(jī)TIME0:DJNZR2,LOOP1 ;循環(huán)6次后回到初始值繼續(xù)循環(huán)，小于6次跳到LOOP1 MOVR2,#08H MOVR1,#01H MOVR0,#LEDBUF ;初始化數(shù)據(jù)LOOP1:MOVTH0,#0EFHMOVTL0,#0FFH ;初始化定時(shí)器0 MOVA,R1 MOVP1,A RLA MOVR1,A ;將R1中片選信號輸入P1并且使其數(shù)據(jù)左移一位 MOVA,@R0 MOVCA,@A+DPTR MOVP2,A INCR0 ;通過查表將ledbuf中數(shù)據(jù)送往P2 RETITIME1:MOVTH1,#0D8H MOVTL1,#0F0H DJNZR7,LOOP2 MOVR7,#0AH MOVLEDBUF+7,#00H DJNZR6,LOOP3 MOVR6,#0AH MOVLEDBUF+6,#00H DJNZR5,LOOP4 MOVR5,#0AH MOVLEDBUF+4,#00H DJNZR4,LOOP5 MOVR4,#06H MOVLEDBUF+3,#00H DJNZR3,LOOP6 MOVLEDBUF+1,#00H MOVR3,#0AH INCLEDBUF MOVA,#0AH CJNEA,LEDBUF,EXIT MOVLEDBUF,#0 MOVLEDBUF+1,#0 MOVLEDBUF+2,#0AH MOVLEDBUF+3,#0 MOVLEDBUF+4,#0 MOVLEDBUF+5,#0AH MOVLEDBUF+6,#0 MOVLEDBUF+7,#0 LJMPEXITLOOP6:INCLEDBUF+1 LJMPEXITLOOP5:INCLEDBUF+3 LJMPEXITLOOP4:INCLEDBUF+4 LJMPEXITLOOP3:INCLEDBUF+6 LJMPEXITLOOP2:INCLEDBUF+7 EXIT: RETI ;寫入要顯示的數(shù)字INTRUPER0:MOVLEDBUF,#0 MOVLEDBUF+1,#0 MOVLEDBUF+2