基于89c51(80c51)自動(dòng)斷電保護(hù)系統(tǒng)的單片機(jī)課程設(shè)計(jì)報(bào)告-閱讀頁(yè)
2025-07-08 06:29本頁(yè)面
【正文】 MOV DPTR,09004H MOVX DPTR,A MOV DPTR,09002H MOV A,01H MOVX DPTR,A MOV A,0 MOVX DPTR,A MOV A,R1 ；顯示設(shè)置數(shù)據(jù) MOV B,10 DIV AB MOV DPTR,TAB MOVC A,A+DPTR MOV DPTR,09004H MOVX DPTR,A MOV DPTR,09002H MOV A,08H MOVX DPTR,A MOV A,B MOV DPTR,TAB MOVC A,A+DPTR MOV DPTR,09004H MOVX DPTR,A MOV DPTR,09002H MOV A,04H MOVX DPTR,A LJMP RETURN ；返回 DELAY: ；延時(shí)函數(shù) MOV R6, 50DELAY_LOOP: DJNZ R6,DELAY_LOOP RETTS: PUSH ACC ；保護(hù)現(xiàn)場(chǎng) PUSH PSW PUSH DPH PUSH DPL MOV DPTR,8000H ；AD片選 MOVX A,DPTR ；讀取AD值 MOV B,5 ；數(shù)據(jù)轉(zhuǎn)換 DIV AB MOV B,2 MUL AB MOV B,5 DIV AB MOV R0,A ；送入采樣數(shù)據(jù)顯示緩沖區(qū) SETB C CJNE A,70H,NEXT ；判斷是否達(dá)到報(bào)警值NEXT: JNC NEXT0 ；是，轉(zhuǎn)到NEXT0 CLR 20H ；清除報(bào)警標(biāo)志位，正常工作 CLR ；清除報(bào)警，繼電器正常 CLR LJMP BACK ；返回NEXT0: SETB 20H ；報(bào)警標(biāo)志位置1 SETB ；繼電器斷開(kāi) SETB ；LED亮 LJMP BACK ；返回T_0: PUSH ACC ；保護(hù)現(xiàn)場(chǎng) PUSH PSW PUSH DPH PUSH DPL MOV TH0,0F6H ；重裝初值 MOV TL0,3CH JB 20H,NEXT1 ；判斷報(bào)警標(biāo)志位，是1，轉(zhuǎn)到NEXT1NEXT2: DJNZ R7,BACK ；判斷是否夠1S，不到，返回 MOV R7,200 ；重置1S計(jì)數(shù)初值 MOV A,0 ；啟動(dòng)AD MOV DPTR,8000H MOVX DPTR,ABACK: ；中斷返回函數(shù) POP DPL ；恢復(fù)現(xiàn)場(chǎng) POP DPH POP PSW POP ACC RETINEXT1: CPL ；揚(yáng)聲器驅(qū)動(dòng) LJMP NEXT2 ；跳轉(zhuǎn)到NFTX2，判斷是否到1STAB: DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH 附件B
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