【正文】 MOV TH0,4CH MOV TH1,0 MOV TL1,0 MOV TMOD,51H SETB ET0 SETB TR0 SETB TR1 SETB EA CALL CLEAR JMP MAIN1CLEAR: MOV A,00H RET LCDRESET: LCALL DL1MS MOV START,0F8H MOV COM,30H LCALL LCDWRITE MOV COM,0CH LCALL LCDWRITE MOV COM,01H LCALL LCDWRITE LCALL DL1MS MOV COM,06H LCALL LCDWRITE RETLCDWRITE: MOV A,COM ANL A,0FH MOV A,COM SWAP A ANL A,0F0H MOV LDATA,A MOV A,START LCALL SENDBIT LCALL DL1MS MOV A,HDATA LCALL SENDBIT LCALL DL1MS MOV A,LDATA LCALL SENDBIT LCALL DL1MS RETHZKDIS: MOV START,0F8H MOV COM,80H LCALL LCDWRITE MOV DPTR,TAB MOV A,00HDIS_1:MOV R6,8DIS_2:MOV START,0FAH CLR A MOVC A,A+DPTR MOV COM,A CALL LCDWRITE INC DPTR CLR A MOVC A,A+DPTR MOV COM,A CALL LCDWRITE INC DPTR CALL DL40MS DJNZ R6,DIS_2 RETERXING: MOV START,0F8H MOV COM,92H CALL LCDWRITE MOV START,0FAH MOV DPTR,TAB2 MOV A,DWEI MOV A,A+DPTR MOV COM,A LCALL LCDWRITE LCALL DL1MS MOV START,0F8H MOV COM,93H CALL LCDWRITE MOV START,0FAH MOV DPTR,TAB2 MOV A,DGAO MOVC A,A+DPTR MOV COM,A LCALL LCDWRITE LCALL DL1MS RETHZKDIS2: MOV START,0F8H MOV COM,94H LCALL LCDWRITE MOV DPTR,TAB3 MOV R6,3DIS_4: MOV START,0FAH CLR A MOVC A,A+DPTR MOVC COM,A CALL LCDWRITE INC DPTR CLR A MOVC A,A+DPTR MOV COM,A CALL LCDWRITE INC DPTR CALL DL40MS DJNE R6,DIS_4 RETSENDBIT: MOV R7,08HSEND_1: RLC A MOV STD,C CLR SCLK SETB SCLK DJNZ R7,SEND_1 RETINITO: PUSH DPH PUSH DPL PUSH ACC CLR TR1 MOV A,TL1 MOV B,10H DIV AB MOV DWEI,A MOV DGHAO,B LCALL ERXINGBACK: MOV TL0,00H MOV TH0,4CH SETB TR0 MOV TL1,00 MOV TH1,00 SETB TR1 POP ACC POP DPL POP DPH RETDL1MS: PUSH 00H PUSH 01H PUSH 02H MOV R2,01HWA_PA:MOV R0,0FHWA_PB:MOV R1,0FH DJNZ R1,S DJNZ R0,WA_PB DJNZ R2,WA_PA POP 02H POP 01H POP 00H RET NOP RETDL40MS: SETB PSW,3 MOV R2,03HDL_PA:MOV R0,0FFH DL_PB:MOV R1,0FFH DJNZ R1,S DJNZ R0,DL_PB DJNZ R2,DL_PA CLR PSW,3 RETTAB:DB39。TAB2:DB39。TAB3:DB39。END單片機(jī)控制直流電機(jī)轉(zhuǎn)速及溫度測量程序單片機(jī)控制直流電機(jī)轉(zhuǎn)速及溫度測量程序如下： ORG 0000H LJMP MAIN ORG 0003H 。測溫中斷入口 SETB 01H RETI ORG 0050HMAIN:MOV TCON,05H 。開外部中斷 mov r3,80hDAC:CLR 00H jnb ,jia jnb ,jian LX:mov a,r3 mov dptr,0f7ffh movx dptr,a MOV 2DH,0CH 。溫度標(biāo)志 LCALL DISPLAY JB 00H,DAC LJMP ADC。加速度 add a,10h mov r3,a ljmp LX jian:mov a,r3 。************************************************************** CSD:mov 31h,00h MOV 30H,5 。設(shè)定時(shí)器1為方式1，計(jì)算器0為方式1 mov th0,00h mov tl0,00h MOV TH1,9EH 。啟動計(jì)數(shù)器 SETB TR1 。測得的轉(zhuǎn)速二進(jìn)制放入31H單元中 RET。選中ADC0809 MOVX DPTR,A 。等待A/D轉(zhuǎn)換完畢 MOVX A,DPTR COMP:MOV B,0FEH 。Tc=100 CLR C SUBB A,B CJNE A,20H,COMP1 COMP1:JC COMP4 。溫度大于140度數(shù)碼管顯示F COMP4:MOV 2AH,0EH MOV 2BH,0EH MOV 2CH,0EH COMP3:RET。R1為BCD碼百位寄存器 MOV R2,00H 。減100 JC CHAN1 INC R1 SJMP CHAN CHAN1:ADD A,64H CHAN2:SUBB A,0AH JC CHAN3 INC R2 SJMP CHAN2 CHAN3:ADD A,0AH MOV 2AH,R1 MOV 2BH,R2 MOV 2CH,A 。****************************************************************DISPLAY:MOV R7,150 。送段碼 MOV A,00H MOVX DPTR,A 。送顯示緩沖區(qū)首地址 MOV R4,05H 。顯示第一個數(shù)碼管 DISPO:MOV A,R0 。送段選地址 MOVX DPTR,A 。送位選地址 MOVX DPTR,A 。延時(shí)約一毫秒 MOV DPTR,0FEFFH MOV A,00H MOVX DPTR,A