四川大学出版社 西华大学黄惟公等老师编写的单片机实验答案.doc

实验1 红黄绿灯控制 ORG 0000H RED EQU P1.0 YELLOW EQU P1.1 GREEN EQU P1.2 MAIN: CLR RED SETB YELLOW SETB GREEN MOV R0,#40 ACALL DELAY SETB RED CLR YELLOW SETB GREEN MOV R0,#20 ACALL DELAY SETB RED CLR YELLOW CLR GREEN MOV R0,#10 ACALL DELAY SETB RED SETB YELLOW CLR GREEN MOV R0,#30 ACALL DELAY AJMP MAINDELAY: MOV A,R0 MOV R7,ADEL0: MOV R6,#200DEL1: MOV R5,#250DEL2: DJNZ R5,DEL2 DJNZ R6,DEL1 DJNZ R7,DEL0 RET END实验2 LED、LCD显示LED: ORG 0000H AJMP MAIN ORG 0030HMAIN: CLR P2.4 SETB P2.5LOOP: MOV R0,#00H MOV R4,#0AHLP: MOV A,R0 MOV DPTR,#TAB MOVC A,A+DPTR MOV P0,A LCALL DELAY INC R0 DJNZ R4,LP AJMP LOOPDELAY: MOV R7,#10DEL0: MOV R6,#200DEL1: MOV R5,#250DEL2: DJNZ R5,DEL2 DJNZ R6,DEL1 DJNZ R7,DEL0 RETTAB:DB 0C0h,0F3h,98h,92h,0A3h,86H,84H,0D3H,80H,82H ENDLCD: ORG 0000H AJMP MAIN DAT EQU P2.7 CLK EQU P2.6 MOV R1,#00 MAIN: MOV 79H,#10 MOV 78H,#10 MOV 77H,#10 MOV 76H,#10 MOV 75H,R1 LCALL DISPLAY LCALL DELAY INC R1 CJNE R1,#10,MAIN MOV R1,#00 AJMP MAIN DISPLAY: MOV R0,#79H SETB CLK MOV DPTR,#TABLOOP: MOV A,R0 MOVC A,A+DPTR ACALL DIS DEC R0 CJNE R0,#74H,LOOP SETB DAT SETB CLK RETDIS: MOV R7,#8DIS1: CLR CLK RRC A MOV DAT,C SETB CLK DJNZ R7,DIS1 CLR CLK SETB DAT RETDELAY: MOV R4,#10DEL0: MOV R6,#200DEL1: MOV R5,#250DEL2: DJNZ R5,DEL2 DJNZ R6,DEL1 DJNZ R4,DEL0 RETTAB: DB 90H,0F3H,89H,0A1H,0E2H,0A4H DB 84H,0F1H,80H,0A0H,0FFH END实验3 键盘实验ORG 0000H AJMP MAIN ORG 0030HMAIN: MOV P0,#0C0H CLR P2.4 SETB P2.5 MOV R1,#00H KEY1: SETB P2.2 JB P2.2,KEY2 ACALL DELAYKEY11:SETB P2.2 JNB P2.2,KEY11 LCALL OPENLED CLR P1.0 SETB P1.1 SETB P1.2KEY2: SETB P2.1 JB P2.1,KEY3 ACALL DELAYKEY22:SETB P2.1 JNB P2.1,KEY22 CLR P1.1 SETB P1.0 SETB P1.2KEY3: SETB P2.0 JB P2.0,KEY1 ACALL DELAYKEY33:SETB P2.0 JNB P2.0,KEY33 CLR P1.2 SETB P1.0 SETB P1.1 AJMP KEY1OPENLED:INC R1 MOV A,R1 MOV DPTR,#TAB MOVC A,A+DPTR MOV P0,A CJNE R1,#0AH,LOOP MOV R1,#0LOOP: JNC MAIN RETDELAY:MOV R2,#200;延时子程序，约10msDEL0: MOV R3,#125DEL1: DJNZ R3,DEL1 DJNZ R2,DEL0 RETTAB:DB 0C0h,0F3h,98h,92h,0A3h,86H,84H,0D3H,80H,82H END实验4 定时器中断实验LED:09ORG 0000HDIGIT1 EQU P2.5DIGIT2 EQU P2.4 AJMP MAIN ORG 000BH AJMP INTR0 ORG 0030HMAIN: MOV R0,#00H MOV R2,#100 ;中断100次为1s MOV P0,#0FFH SETB DIGIT1 ;点亮右边的LED CLR DIGIT2 MOV TMOD,#01H ;T0定时，工作方式1 MOV TH0,#0E0H ;T0计数初值 MOV TL0,#80H SETB EA SETB ET0 SETB TR0 AJMP $ ;等待中断INTR0: MOV TH0,#0E0H ;T0重赋初值 MOV TL0,#80H DJNZ R2,LP ;是否中断100次 MOV DPTR,#TAB MOV A,R0 MOVC A,A+DPTR MOV P0,A MOV R2,#100 INC R0 CJNE R0,#0AH,LP MOV R0,#00HLP: RETI TAB:DB 0C0H,0F3H,98H,92H,0A3H,86H,84H,0D3H,80H,82H END LED:0099ORG 0000HDIGIT1 EQU P2.5DIGIT2 EQU P2.4LED_1 EQU 7FHLED_2 EQU 7EH AJMP MAIN ORG 000BH AJMP INTR0 ORG 0030HMAIN: MOV R0,#00 MOV R2,#100 ;中断100次为1s MOV P0,#0FFH MOV TMOD,#01H ;T0定时，工作方式1 MOV TH0,#0E0H ;T0计数初值 MOV TL0,#80H SETB EA SETB ET0 SETB TR0 AJMP $ ;等待中断INTR0: MOV TH0,#0E0H ;T0重赋初值 MOV TL0,#80H DJNZ R2,LP2 ;是否中断100次 MOV R2,#100LP1: INC R0 CJNE R0,#100,LP2 MOV R0,#00LP2: MOV P0,#0FFH ACALL DISPLAY RETIDISPLAY:ACALL INV16_10 JB F0,DISLED1 AJMP DISLED2DISLED1:MOV A,LED_1 SETB DIGIT1 CLR DIGIT2 CLR F0 AJMP DISDISLED2:MOV A,LED_2 CLR DIGIT1 SETB DIGIT2 SETB F0DIS: MOV DPTR,#TAB MOVC A,A+DPTR MOV P0,A RETINV16_10:MOV A,R0 MOV B,#10 DIV AB MOV LED_2,A MOV LED_1,B RETTAB:DB 0C0H,0F3H,98H,92H,0A3H,86H,84H,0D3H,80H,82H ENDLCD:0099 ORG 0000H DAT EQU P2.7 CLK EQU P2.6 MOV 79H,#10 MOV 78H,#10 MOV 77H,#10 MOV R1,#0FFHMAIN: INC R1 CJNE R1,#100,NEXT MOV R1,#00NEXT: LCALL INV16_10 LCALL DISPLAY LCALL DELAY AJMP MAIN DISPLAY: MOV R0,#79H SETB CLK MOV DPTR,#TABLOOP: MOV A,R0 MOVC A,A+DPTR ACALL DIS DEC R0 CJNE R0,#74H,LOOP SETB DAT SETB CLK RETDIS: MOV R7,#8DIS1: CLR CLK RRC A MOV DAT,C SETB CLK DJNZ R7,DIS1 CLR CLK SETB DAT RETDELAY: MOV R4,#10DEL0: MOV R6,#200DEL1: MOV R5,#250DEL2: DJNZ R5,DEL2 DJNZ R6,DEL1 DJNZ R4,DEL0 RETINV16_10:MOV A,R1 MOV B,#10 DIV AB MOV 76H,A MOV 75H,B RETTAB: DB 90H,0F3H,89H,0A1H,0E2H,0A4H DB 84H,0F1H,80H,0A0H,0FFH END 实验5 计数器实验 000255： ORG 0000H DAT EQU P2.7 CLK EQU P2.6 AJMP MAIN ORG 0030HMAIN: CLR A MOV 79H,#10 MOV 78H,#10 MOV 77H,A MOV 76H,A MOV 75H,A MOV TMOD,#01100000B MOV TL1,#00H MOV TH1,#00H SETB TR1LOOP: ACALL INV16_10 ACALL DISPLAY ACALL DELAY AJMP LOOPINV16_10: MOV A,TL1 MOV B,#100 DIV AB MOV 77H,A MOV A,B MOV B,#10 DIV AB MOV 76H,A MOV 75H,B RETDISPLAY: MOV R0,#79H SETB CLK MOV DPTR,#TABLOOP1: MOV A,R0 MOVC A,A+DPTR ACALL DIS DEC R0 CJNE R0,#74H,LOOP1 SETB DAT SETB CLK RETDIS: MOV R7,#8DIS1: CLR CLK RRC A MOV DAT,C SETB CLK DJNZ R7,DIS1 CLR CLK SETB DAT RETDELAY: MOV R4,#3DEL0: MOV R6,#200DEL1: MOV R5,#250DEL2: DJNZ R5,DEL2 DJNZ R6,DEL1 DJNZ R4,DEL0 RETTAB: DB 90H,0F3H,89H,0A1H,0E2H,0A4H DB 84H,0F1H,80H,0A0H,0FFH END 0000099999：实验6 A/D转换器实验ORG 0000H CK1 EQU P3.6 DO1 EQU P3.7 CS EQU P3.3 V_1 EQU 77H V_10 EQU 76H AJMP MAIN ORG 0030HMAIN:ACALL AD ACALL CAL_VOL ACALL DISPLAY ACALL DELAY AJMP MAIN AD:MOV R5,#8 CLR CS CLR CK1 SETB CK1 CLR CK1 SETB CK1 CLR CK1 CLR DO1 NOP NOP SETB CK1 NOP NOP CLR CK1 SETB DO1 NOP NOP SETB CK1 NOP NOPADA: CLR CK1 MOV C,DO1 RLC A SETB CK1 DJNZ R5,ADA SETB CS MOV 20H,A RETCAL_VOL:MOV A,20H MOV B,#50 MUL AB MOV A,B MOV B,#10 DIV AB ADD A,#11 MOV V_1,A MOV V_10,B RETDAT EQU P2.7CLK EQU P2.6DISPLAY:MOV 79H,#10 MOV 78H,#10 MOV 75H,#21 MOV R0,#79H SETB CLK MOV DPTR,#TABLOOP:MOV A,R0 MOVC A,A+DPTR ACALL DIS DEC R0 CJNE R0,#74H,LOOP SETB DAT SETB CLK RETDIS:MOV R7,#8DIS1:CLR CLK RRC A MOV DAT,C SETB CLK DJNZ R7,DIS1 CLR CLK SETB DAT RETTAB:DB 90H,0F3H,89H,0A1H,0E2H,0A4H,84H,0F1H,80H,0A0H,0FFH DB 10H,73H,09H,21H,62H,24H,02H,71H,00H,20H,0EAHDELAY:MOV R4,#0 L1:MOV R6,#0 DJNZ R6,$ DJNZ R4,L1 RET END实验7 PC机与单片机的串行通讯实验ORG 0000H AJMP MAIN ORG 0023H AJMP REC ORG 0030HMAIN:CLR P2.4 SETB P2.5 MOV TMOD,#00100000B;T1方式2 MOV TH1,#0FDH MOV TL1,#0FDH MOV SCON,#11010011B;中断方式3，允许串口接收 SETB EA SETB ES SETB TR1 AJMP $REC: JNB RI,$ CLR RI MOV A,SBUFTRS: JNB TI,$ CLR TI MOV SBUF,A MOV DPTR,#TAB MOVC A,A+DPTR MOV P0,A RETITAB:DB 0C0H,0F3H,98H,92H,0A3H,86H,84H,0D3H,80H,82H END实验8： LED_3 EQU 79H LED_2 EQU 7AH LED_1 EQU 7BH LED_0 EQU 7CH FLAG1 EQU 7FH DQ EQU P3.4 TEMPER_L EQU 29H TEMPER_H EQU 28H TEMPER_P EQU 27H ORG 0000H AJMP MAIN ORG 0030HMAIN: LCALL INIT_1820 LCALL GET_TEMPER LCALL COV_T LCALL DISPLAY ACALL DELAY AJMP MAINCLK EQU P2.6DAT EQU P2.7DISPLAY:MOV LED_3,#21 MOV 7DH,#10 MOV R0,#7DH SETB CLK MOV DPTR,#TABLOOP: MOV A,R0 MOVC A,A+DPTR ACALL DIS DEC R0 CJNE R0,#78H,LOOP SETB DAT SETB CLK RETDIS: MOV R7,#8DIS1: CLR CLK RRC A MOV DAT,C SETB CLK DJNZ R7,DIS1 CLR CLK SETB DAT RETTAB:DB 90H,0F3H,89H,0A1H,0E2H,0A4HDB 84H,0F1H,80H,0A0H,0FFH DB 10H,73H,09H,21H,62H,24H,04H,71H,00H,20H,9CHDELAY: MOV R2,#5DELAY3: MOV R3,#0DELAY2: MOV R4,#0DELAY1: DJNZ R4,DELAY1 DJNZ R3,DELAY2 DJNZ R2,DELAY3 RETCOV_T: MOV A,TEMPER_L MOV TEMPER_P,#00H MOV C,40H RRC A MOV 38H,C MOV C,41H RRC A MOV 39H,C MOV C,42H RRC A MOV 3AH,C MOV C,43H RRC A MOV 3BH,C MOV TEMPER_L,A MOV A,29H MOV B,#10 DIV AB MOV LED_0,A MOV A,#11 ADD A,B MOV LED_1,A MOV A,27H MOV DPTR,#POINTTAB MOVC A,A+DPTR MOV LED_2,A RETPOINTTAB:DB 00H,01H,01H,02H,03H,03H,04H,04HDB 05H,06H,06H,07H,08H,08H,09H,09H INIT_1820:SETB DQ NOP CLR DQ MOV R0,#06BH MOV R1,#03H TSR1:DJNZ R0,TSR1 MOV