單片機(jī)課程設(shè)計(jì)說明書-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)
2024-12-16 17:23 本頁面
【文章內(nèi)容簡(jiǎn)介】 N HOUR MOV 25H, 00H 。定義一個(gè)標(biāo)志位 MOV 30H, 00H 。時(shí)間 BCD SECOND MOV 31H, 00H MOV 32H, 00H 。 BCD MINUTE MOV 33H, 00H MOV 34H, 00H 。 BCD HOUR MOV 35H, 00H MOV 36H, 01H 。鬧鈴 BCD MINUTE 單片機(jī)課程設(shè)計(jì)說明書 MOV 37H, 00H MOV 38H, 01H 。 BCD HOUR 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 A1 A1: CLR LCALL SETTIME ；調(diào)用設(shè)置現(xiàn)在時(shí)間子程序 LJMP LOOP M1: JB K2, M2 LCALL XIAOZHEN2 MOV C, JC A2 A2: CLR LCALL SETTIME ；調(diào)用設(shè)置鬧鐘的程序 單片機(jī)課程設(shè)計(jì)說明書 LJMP LOOP M2: JB K4, M3 A3: LCALL XIAOZHEN3 MOV C, JC A4 A4: CLR M3: LJMP LOOP SETTIME: LO: LCALL DISPLAY1 JB K2, L1 LCALL XIAOZHEN4 MOV C, JC A5 A5: CLR DEC 22H MOV A， 22H CJNE A， 18H,G012 MOV 22H, 00H MOV 34H, 00H MOV 35H, 00H LJMP L0 L1: JB K3, L2 LCALL XIAOZHEN5 MOV C, JC A6 單片機(jī)課程設(shè)計(jì)說明書 A6: CLR DEC 21H MOV A， 21H CJNE A， 3CH,G011 MOV 21H, 00H MOV 32H, 00H MOV 33H, 00H LJMP L0 GO11: MOV B， 0AH DIV AB MOV 32H, B MOV 33H, A LJMP L0 GO12: MOV B， 0AH DIV AB MOV 34H, B MOV 35H, A LJMP L0 L2: JB K4, L0 LCALL XIAOZHEN3 MOV C, JC AX AX: CLR RET SETATIME: LCALL DISPLAY2 單片機(jī)課程設(shè)計(jì)說明書 NO: LCALL DISPLAY2 JB K3, N1 LCALL XIAOZHEN6 MOV C, JC A7 A7: CLR DEC 24H MOV A, 24H CJNE A,24， G022 MOV 24H, 00H MOV 38H, 00H MOV 39H, 00H LJMP N0 N1: JB K1 N2 LCALL XIAOZHEN7 MOV C, JC A8 A8: CLR DEC 23H MOV A, 23H CJNE A,60， G021 MOV 23H, 00H MOV 36H, 00H MOV 37H, 00H LJMP N0 單片機(jī)課程設(shè)計(jì)說明書 G021: MOV B, 0AH DIV AB MOV 36H, B MOV 37H, A LJMP N0 G022: MOV B, 0AH DIV AB MOV 38H, B MOV 39H, A LJMP N0 N2: JB K4 N0 LCALL XIAOZHEN3 MOV C, JC A9 A9: CLR RET TIMEPRO: MOV A, 21H MOV B, 23H CJNE A, B, BK MOV A, 22H MOV B, 24H CJNE A, B, BK SETB MOV C, JC XX 單片機(jī)課程設(shè)計(jì)說明書 XX: LCALL TIMEOUT BK: RET TIMEOUT: X1: LCALL BZ LCALL DISPLAY2 CLR JB K4， X1 RET BZ: CLR MOV R7, 250 T2: MOV R6, 124 T3: DJNZ R6， T3 DJ
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