【正文】 制。最好加一跳針，以便與其他功能區(qū)分開。延時，通過改變它的大小可以改變占空比END：ORG 0000HLJMP STR1ORG 0100H STR1: CLR 。源程序：ORG 0000HLJMP LOOP1ORG 0100H。源程序：ORG 0000HLJMP MAINORG 0100HMAIN:MOV P0,0FFH MOV A,0F9H MOV DPTR,0001H MOVX DPTR,A CLR A MOVX A,DPTR MOV P2,A SJMP $END九、AD轉(zhuǎn)換功能描述：向ADC0809輸入模擬信號電壓，經(jīng)轉(zhuǎn)換后在數(shù)碼管上顯示電壓值。行置0，看列電平 JNB ,L5 JNB ,L6 JNB ,L7 JNB ,L8L5:JNB ,L5MOV 20H,0AJMP KEYL6: JNB ,L6MOV 20H,1AJMP KEYL7:JNB ,L7MOV 20H,2AJMP KEYL8: JNB ,L8MOV 20H,3AJMP KEYLLL2:LJMP XSKEY:MOV A,R1。判斷按鍵有無按下LX1: CJNE A,0A0H,LX2LJMP P100LX2: CJNE A,0F9H,LX3LJMP P1000LX3: CJNE A,0C4H,XSLJMP P10000XS: MOV 40H,01H MOV DPTR,TAB MOV P0,40H MOV A,30H MOVC A,A+DPTR MOV P2,A LCALL YS1MS MOV P2,0FFH MOV A,42H MOV 40H,A MOV P0,40H MOV A,31H ADD A,10 MOVC A,A+DPTR MOV P2,A LCALL YS1MS MOV P2,0FFH MOV A,44H MOV 40H,A MOV P0,40H MOV A,32H MOVC A,A+DPTR MOV P2,A LCALL YS1MS MOV P2,0FFH MOV A,48H MOV 40H,A MOV P0,40H MOV A,33H ADD A,10 MOVC A,A+DPTR MOV P2,A LCALL YS1MS MOV P2,0FFH MOV A,50H MOV 40H,A MOV P0,40H MOV A,34H MOVC A,A+DPTR MOV P2,A LCALL YS1MS MOV P2,0FFH MOV A,60H MOV 40H,A MOV P0,40H MOV A,35H MOVC A,A+DPTR MOV P2,A LCALL YS1MS MOV P2,0FFH MOV A, 40H MOV 40H,A JNB 4FH,LLLL1 CLR 4FHLJMP JIA LLLL1:LJMP XS00P100: MOV 30H,0 MOV 31H,0 MOV 32H,0 MOV 33H,0 MOV 34H,0 MOV 35H,0JIA: MOV R1,14H MOV A,35H CJNE A,9,JIA1 MOV 35H,0 MOV A,34H CJNE A,5,JIA10 MOV 34H,0P10000: MOV A,33H CJNE A,9,JIA100 MOV 33H,0 MOV A,32H CJNE A,5,JIA1000 MOV 32H,0P1000: MOV A,31H CJNE A,9,JIA10000 MOV 31H,0MOV A,30H CJNE A,2,JIA100000 MOV 30H,0 AJMP XSJIA100000: INC 30H AJMP XS0JIA10000: CJNE A,3,JIAJIA MOV A,30H CJNE A,02,JIAJIA MOV 30H,0 MOV 31H,0 AJMP XS0JIAJIA: INC 31H AJMP XS0JIA1000:INC 32H AJMP XS0JIA100: INC 33H AJMP XS0JIA10: INC 34H AJMP XS0JIA1: INC 35H AJMP XS0 RET YS1MS: MOV R6,9HYL1: MOV R7,19H DJNZ R7,$ DJNZ R6,YL1 RETDL10MS:MOV R7,05HLOOP1: MOV R6,0F9HLOOP2:NOP NOP DJNZ R6,LOOP2 DJNZ R7,LOOP1 RETDELAY: MOV R5,50 D1: MOV R6,20 D2: MOV R7,248 DJNZ R7,$ DJNZ R6,D2 DJNZ R5,D1 RET 。蜂鳴器子程序 ACALL DELAY SETB RETDELAY: MOV R5,50。列置0，看行電平 JNB ,L1 JNB ,L2 JNB ,L3 JNB ,L4 AJMP MAINL1: MOV R1,0AJMP LL1L2: MOV R1,1AJMP LL1L3: MOV R1,2AJMP LL1L4: MOV R1,3AJMP LL1LL1: ACALL DL10MS。給P1口送值LCALL DLY RL A 。 一、系統(tǒng)電源用MC7805集成穩(wěn)壓器將輸入電壓轉(zhuǎn)為+5V穩(wěn)壓給系統(tǒng)供電。用P1口設(shè)計流水燈，用P2口和P0口分別作段選和位選設(shè)計了六位數(shù)碼管的靜動態(tài)顯示和簡易的電子鐘，用P3口設(shè)計了一個4*4的矩陣鍵盤，并用蜂鳴器實現(xiàn)了唱歌功能和鍵盤按下的聲響，用62256擴展內(nèi)部RAM，還擴展并實現(xiàn)了LCD1602的靜動態(tài)顯示，最后通過ADC0809和 DAC0832分別實現(xiàn)了A/D、D/A轉(zhuǎn)換功能。三、流水燈功能描述：讓8個led燈循環(huán)閃爍源程序：流水燈ORG 0000H LJMP MAIN ORG 0100H MAIN:MOV A,11111110B LOOP:MOV P1,A。源程序：ORG 0000HLJMP MAINORG 0100HMAIN: MOV P0,0FFHMOV B,4 MOV P3,0F0H。計算鍵值并查表賦值 MUL AB ADD A,20H MOV R2,AMOV DPTR,TABLEMOV A,R2MOVC A,A+DPTRMOV P2,ACALL BEEP_BLLCALL DELAYLJMP MAINBEEP_BL: CLR 。中斷延時ORG 1000H MOV 30H,1 MOV 31H,2 MOV 32H,0 MOV 33H,0 MOV 34H,0 MOV 35H,0 MOV TMOD,10H MOV TH1,0D8H MOV TL1,0F0H MOV IE,88HXS0: SETB TR1 MOV 69H,100 CLR 4FHXS00:LJMP KEYKEY。消抖 MOV A,P3 XRL A,0F0H JZ LLL2 MOV P3,0FH。源程序：RS EQU RW EQU E EQU ORG 0000HLJMP MAINORG 0100HMAIN: ACALL DEL5MS ACALL DEL5MS ACALL DEL5MS MOV P1,38H ACALL ENABLE1 ACALL DEL5MS MOV P1,38H ACALL ENABLE1 ACALL DEL5MS MOV P1,38H ACALL ENABLE1 MOV P1,00000001B ACALL ENABLE MOV P1,00111000B ACALL ENABLE MOV P1,00001111B ACALL ENABLE MOV P1,00000100B ACALL ENABLE MOV P1,8FH ACALL ENABLE MOV DPTR,TABLE1 ACALL L1 MOV P1,0CFH ACALL ENABLE MOV DPTR,TABLE2 ACALL L2 SJMP $L1:MOV R1,00HLL1:MOV A,R1 MOVC A,A+DPTR MOV P1,A ACALL DELXXMS ACALL WRITE_LCD INC R1 CJNE A,00H,LL1 RETL2:MOV R1,00HLL2:MOV A,R1 MOVC A,A+DPTR MOV P1,A ACALL DELXXMS ACALL WRITE_LCD INC R1 CJNE A,00H,LL1 RETWRITE_LCD: SETB RS CLR RW CLR E ACALL DELAY SETB E RETENABLE1:CLR RS CLR RW CLR E SETB E RETENABLE:CLR RS CLR RW CLR E ACALL DELAY SETB E RETDELAY:MOV P1,0FFH CLR RS SETB RW CLR E NOP SETB E JB ,DELAY RETDEL5MS:MOV R7,125DEL1:MOV R6,18 NOPDEL2:DJNZ R6,DEL2 DJNZ R7,DEL1 RETDELXXMS:MOV R7,250 DEL3:MOV R6,250 NOP DEL4:DJNZ R6,DEL4 DJNZ R7,DEL3 RETtable1: dbUHZ NAIT table2: db*********: END八、外部RAM擴展功能描述：將片內(nèi)數(shù)據(jù)送到片外RAM儲存，再送回片內(nèi)，在數(shù)碼管中顯示。給0809時鐘RETIORG 0100HSTART: MOV LED_0,00H MOV LED_1,00H MOV LED_2,00H MOV TMO