基于at89s52單片機(jī)的數(shù)字倒計(jì)時(shí)器設(shè)計(jì)(編輯修改稿)
2025-09-10 11:17 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 MOV 39H, 00H MOV TMOD, 01H 。16 位計(jì)數(shù)器 T0,方式 1 MOV THO, 03CH 。賦初值 MOV TLO, 0B0H MOV IE, 10000111B。開中斷 TO,EA=1 SETB TRO 。T0 啟動(dòng)計(jì)數(shù) MOV R2， 14H 。計(jì)數(shù)器 MOV P2， 0FFH LOOP:LCALL TIMEPRO 。調(diào)用現(xiàn)在時(shí)間與鬧鈴時(shí)間比較程序 LCALL DISPLAY1 。調(diào)用現(xiàn)在時(shí)間顯示子程序 JB K1，M1 。判斷按鍵是否按下 LCALL XIAOZHEN1 。調(diào)用消抖程序 MOV C, JC A1A1: CLR LCALL SETTIME ；調(diào)用設(shè)置現(xiàn)在時(shí)間子程序LJMP LOOPM1: JB K2, M2LCALL XIAOZHEN2MOV C, JC A2A2: CLR LCALL SETTIME ；調(diào)用設(shè)置鬧鐘的程序單片機(jī)/ 微機(jī)接口課程設(shè)計(jì)說(shuō)明書11LJMP LOOPM2: JB K4, M3A3: LCALL XIAOZHEN3MOV C, JC A4A4: CLR M3: LJMP LOOPSETTIME:LO: LCALL DISPLAY1 JB K2, L1 LCALL XIAOZHEN4 MOV C, JC A5A5: CLR DEC 22H MOV A，22H CJNE A，18H,G012 MOV 22H, 00HMOV 34H, 00HMOV 35H, 00H LJMP L0L1: JB K3, L2 LCALL XIAOZHEN5MOV C, JC A6單片機(jī)/ 微機(jī)接口課程設(shè)計(jì)說(shuō)明書12A6: CLR DEC 21H MOV A，21H CJNE A，3CH,G011 MOV 21H, 00HMOV 32H, 00HMOV 33H, 00H LJMP L0GO11: MOV B，0AH DIV ABMOV 32H, BMOV 33H, A LJMP L0GO12: MOV B，0AH DIV ABMOV 34H, BMOV 35H, A LJMP L0L2: JB K4, L0LCALL XIAOZHEN3MOV C, JC AXAX: CLR RETSETATIME: LCALL DISPLAY2單片機(jī)/ 微機(jī)接口課程設(shè)計(jì)說(shuō)明書13NO: LCALL DISPLAY2JB K3, N1LCALL XIAOZHEN6MOV C, JC A7A7: CLR DEC 24HMOV A, 24H CJNE A,24，G022 MOV 24H, 00HMOV 38H, 00HMOV 39H, 00HLJMP N0N1: JB K1 N2 LCALL XIAOZHEN7MOV C, JC A8A8: CLR DEC 23HMOV A, 23HCJNE A,60，G021 MOV 23H, 00HMOV 36H, 00HMOV 37H, 00HLJMP N0單片機(jī)/ 微機(jī)接口課程設(shè)計(jì)說(shuō)明書14G021: MOV B, 0AH DIV AB MOV 36H, B MOV 37H, ALJMP N0G022: MOV B, 0AH DIV AB MOV 38H, B MOV 39H, ALJMP N0N2: JB K4 N0 LCALL XIAOZHEN3MOV C, JC A9A9: CLR RETTIMEPRO: MOV A, 21HMOV B, 23H CJNE A, B, BK MOV A, 22HMOV B, 24HCJNE A, B, BKSETB MOV C, JC XX單片機(jī)/ 微機(jī)接口課程設(shè)計(jì)說(shuō)明書15XX: LCALL TIMEOUTBK: RETTIMEOUT: X1: LCALL BZ LCALL DISPLAY2CLR JB K4，X1RETBZ: CLR MOV R7, 250T2: MOV R6, 124T3: DJNZ R6，T3DJNZ R7，T2JB K4，XYLCALL XIAOZHEN3MOV C, JC XY1XY: RETXY1: LJMP LOOPXIAOZHEN1: LCALL DISPLAY1JB K1，XIAOZHEN1MOV C, K1LCALL JC XIAOZHEN1LCALL DELAYMOV C, K1單片機(jī)/ 微機(jī)接口課程設(shè)計(jì)說(shuō)明書16JC XIAOZHEN1STOP1: MOV C, K1JNC STOP1LCALL DELAYMOV C, K1JNC STOP1SETB RETXIAOZHEN2: LCALL DISPLAY2 JB K2，XIAOZHEN2MOV C, K2JC XIAOZHEN2STOP2: MOV C, K2 JNC STOP2
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