出租車(chē)計(jì)價(jià)器的設(shè)計(jì)(參考版)
2025-07-02 21:01本頁(yè)面
【正文】 顯示總路程LJMP LP11111LC_11S: LCALL JE_XS 。有進(jìn)位，向總金額的百位進(jìn) DA A MOV 39H,A LUC2S: JNB 30H,LC_11S 。超過(guò)起步公里數(shù)，按單價(jià)累加(單價(jià)存儲(chǔ)在34H35H) ADD A,3BH DA A MOV 3BH,A MOV A,00H ADDC A,3AH 。有進(jìn)位，往個(gè)位和十位進(jìn)位 DA A MOV 3DH,A MOV A,3EH ADDC A,00H 。TR1中斷服務(wù)程序 MOV TL1,00H MOV A,3CH ADD A,01H 。顯示總路程 LJMP LP1111LC_11: LCALL JE_XS 。有進(jìn)位，向總金額的百位進(jìn) DA A MOV 39H,A LUC2: JNB 00H,LC_11 。超過(guò)起步公里數(shù)，按單價(jià)累加(單價(jià)存儲(chǔ)在34H35H) ADD A,3BH DA A MOV 3BH,A MOV A,34H ADDC A,3AH 。比較是否超過(guò)起步公里數(shù) MOV A,37H SUBB A,32H MOV A,36H SUBB A,00H JNB , LUC1 。檢查有無(wú)進(jìn)位，往百位進(jìn) DA A MOV 36H,A CJNE A,10H,LUC0 CPL TR0LUC0: MOV A,38H 。每有1個(gè)脈沖到來(lái)38H加1， DA A MOV 38H,A MOV A,37H ADDC A,00H 。A，B不等轉(zhuǎn)CJH2 SJMP CJH3CJH2:INC R2 DJNZ R7,CJH1CJH3: MOV A,R2 RETTABR: DB 1FH,1EH,1DH,1CH,17H,16H,15H,14H,0FH DB 0EH,0DH,0CH,07H,06H,05H,04HLUC: CLR C 。循環(huán)15次CJH1: MOV A,R2 ADD A,0AH 。保存，求鍵號(hào)子程序 MOV R2,00H 。初始顯示P= MOV 54H,46H MOV 55H,45H MOV 56H,44H MOV 57H,43H MOV 58H,42H MOV 59H,41H ACALL DIR ?？偨痤~顯示，存儲(chǔ)在39H,3AH,3BH單元 ACALL CHE MOV 46H,42H MOV 45H,41H MOV A,3DH ACALL CHE MOV 44H,42H MOV A,41H MOV 43H,A MOV A,3CH ACALL CHE MOV 52H,05H 。初始顯示P= MOV 54H,46H MOV 55H,45H MOV 56H,44H MOV 57H,43H MOV 58H,42H MOV 59H,41H ACALL DIR 。總金額顯示，存儲(chǔ)在39H,3AH,3BH單元 ACALL CHE MOV 46H,42H MOV 45H,41H MOV A,3AH ACALL CHE MOV 44H,42H MOV A,41H ADD A,0AH MOV 43H,A MOV A,3BH ACALL CHE MOV 52H,14H 。 初始顯示L= MOV 54H,46H MOV 55H,45H MOV 56H,44H MOV 57H,43H MOV 58H,42H MOV 59H,41H ACALL DIR 。總路程顯示，總路程存儲(chǔ)在36H,37H,38H ACALL CHE MOV 46H,42H MOV 45H,41H MOV A,37H ACALL CHE MOV 44H,42H MOV A,41H ADD A,0AH MOV 43H,A MOV A,38H ACALL CHE MOV 52H,15H 。 初始顯示 MOV 54H,1BH MOV 55H,1BH MOV 56H,1BH MOV 57H,43H MOV 58H,42H MOV 59H,41H ACALL DIR 。單價(jià)顯示, 單價(jià)存儲(chǔ)在34H,35H單元 ACALL CHE MOV A,41H ADD A,0AH MOV 43H,A MOV A,35H ACALL CHE MOV 52H,1BH 。初始顯示 MOV 54H,1BH MOV 55H,1BH MOV 56H,1BH MOV 57H,43H MOV 58H,42H MOV 59H,41H ACALL DIR 。起步公里顯示, 起步公里數(shù)存儲(chǔ)在 ACALL CHE MOV A,41H ADD A,0AH MOV 43H,A MOV A,33H ACALL CHE MOV 52H,1BH 。初始顯示為 MOV 54H,1BH MOV 55H,1BH MOV 56H,1BH MOV 57H,43H MOV 58H,42H MOV 59H,41H ACALL DIR 。調(diào)用CHE后使以BCD碼形式存儲(chǔ) MOV A,41H ADD A,0AH MOV 43H,A MOV A,31H ACALL CHE MOV 52H,1BH 。CS有效 RETQBJ: MOV A,30H 。發(fā)送一字節(jié)子程序 MOV R6,02H 。7279初始化子程序 MOV R6,0CH 。CHE子程序， SWAP A 。一個(gè)數(shù)碼管顯示完 INC R0 DEC R1 DJNZ R5,D1 。發(fā)送顯示數(shù)據(jù)，即查表后的顯示碼 MOV R6,02HD4: DJNZ R6,D4 。延時(shí) MOV A,R0 ADD A,0DH MOVC A,A+PC 。延時(shí)，大于25US MOV A,R1 ACALL STFS 。顯示碼D1: CLR 。顯示程序，循環(huán)8次（8個(gè)數(shù)碼管） MOV R0,52H 。延時(shí)LLP2: DJNZ R6,LLP2 ACALL STJS 。延時(shí)LLP1: DJNZ R6,LLP1 MOV A,15H ACALL STFS 。位清零，無(wú)鍵按下TP1: MOV A,0FFH RETKEY1: CLR 。為1轉(zhuǎn)LP2 JB 01H,TP1 LCALL KEY1 。鍵盤(pán)值讀入CY RLC A CLR MOV R6,01HA3: DJNZ R6,A3 DJNZ R7,A1 RETKEY: SETB 。接收一字節(jié)子程序A1: SETB SETB MOV R6,02HA2: DJNZ R6,A2 。發(fā)送一字節(jié)子程序 B1: RLC A MOV ,C SETB MOV R6,02H B2: DJNZ R6,B2 。顯示總路程 ACALL DIR LJMP LP0LC_1: ACALL JE_XS 。切換顯示總金額和總路程 JNB 00H,LC_1 。啟動(dòng)T1定時(shí)器，暫停T0計(jì)數(shù)器 MOV IE,88H SETB TR1 CLR TR0 ACALL SHIJIAN 。暫停，程序停止計(jì)數(shù)和定時(shí) LJMP LP0L16:
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