單片機(jī)畢業(yè)設(shè)計(jì)時(shí)鐘程序

1、AT89C2051單片機(jī)時(shí)鐘設(shè)計(jì)程序單片機(jī)時(shí)鐘設(shè)計(jì)程序AT89C2051時(shí)鐘程序定時(shí)器T0、T1溢出周期為50MS，T0為秒計(jì)數(shù)用，T1為調(diào)整時(shí)閃爍用，P3.7為調(diào)整按鈕，P1口為字符輸出口，采用共陽(yáng)顯示管。中斷入口程序G0000H程序執(zhí)行開始地址LJMPSTART跳到標(biāo)號(hào)START執(zhí)行G0003H外中斷0中斷程序入口RETI外中斷0中斷返回G000BH定時(shí)器T0中斷程序入口LJMPINTT0跳至INTTO執(zhí)行G0013H外中斷1中斷程

2、序入口RETI外中斷1中斷返回G001BH定時(shí)器T1中斷程序入口LJMPINTT1跳至INTT1執(zhí)行G0023H串行中斷程序入口地址RETI串行中斷程序返回主程序START:MOVR0#70H清70H7AH共11個(gè)內(nèi)存單元MOVR7#0BHCLEARDISP:MOV@R0#00HINCR0DJNZR7CLEARDISPMOV20H#00H清20H（標(biāo)志用）MOV7AH#0AH放入“熄滅符“數(shù)據(jù)MOVTMOD#11H設(shè)T0、T1為16位定

3、時(shí)器MOVTL0#0B0H50MS定時(shí)初值（T0計(jì)時(shí)用）MOVTH0#3CH50MS定時(shí)初值MOVTL1#0B0H50MS定時(shí)初值（T1閃爍定時(shí)用）MOVTH1#3CH50MS定時(shí)初值SETBEA總中斷開放SETBET0允許T0中斷ACALLCLR0大于或等于24小時(shí)小時(shí)計(jì)時(shí)單元清0OUTT0:MOV72H76H中斷退出時(shí)將分、時(shí)計(jì)時(shí)單元數(shù)據(jù)移MOV73H77H入對(duì)應(yīng)顯示單元MOV74H78HMOV75H79HPOPPSW恢復(fù)狀態(tài)字（出

4、棧）POPACC恢復(fù)累加器SETBET0開放T0中斷RETI中斷返回閃動(dòng)調(diào)時(shí)程序T1中斷服務(wù)程序，用作時(shí)間調(diào)整時(shí)調(diào)整單元閃爍指示INTT1:PUSHACC中斷現(xiàn)場(chǎng)保護(hù)PUSHPSWMOVTL1#0B0H裝定時(shí)器T1定時(shí)初值MOVTH1#3CHDJNZR2INTT1OUT0.3秒未到退出中斷（50MS中斷6次）MOVR2#06H重裝0.3秒定時(shí)用初值CPL02H0.3秒定時(shí)到對(duì)閃爍標(biāo)志取反JB02HFLASH102H位為1時(shí)顯示單元“熄滅

5、“MOV72H76H02H位為0時(shí)正常顯示MOV73H77HMOV74H78HMOV75H79HINTT1OUT:POPPSW恢復(fù)現(xiàn)場(chǎng)POPACCRETI中斷退出FLASH1:JB01HFLASH201H位為1時(shí)，轉(zhuǎn)小時(shí)熄滅控制MOV72H7AH01H位為0時(shí)，“熄滅符“數(shù)據(jù)放入分MOV73H7AH顯示單元（72H73H），將不顯示分?jǐn)?shù)據(jù)MOV74H78HMOV75H79HAJMPINTT1OUT轉(zhuǎn)中斷退出FLASH2:MOV72H76