基于單片機(jī)超聲波測距項(xiàng)目實(shí)驗(yàn)報(bào)告-資料下載頁
2025-06-23 00:29本頁面
【正文】 JNZ JULISUAN3 MOV JULI_H,MUL_L2 MOV JULI_L,MUL_L1 JMP JULISUAN2JULISUAN3:MOV XC4,0EH MOV XC3,10H MOV XC2,10H MOV XC1,10H JMP JULISUAN2JULISUAN1:MOV A,TIME_L MOV B,SUDU MUL AB MOV JULI_L,A MOV JULI_H,B MOV R5,TIMEY_H MOV R4,TIMEY_L MOV R3,0 MOV R2,SUDU MOV R1,MUL_L1 LCALL DUMUL MOV R5,MUL_L2 MOV R4,MUL_L1 MOV R3,3 MOV R2,0E8H LCALL DUDIV MOV A,R4 ADD A,JULI_L MOV JULI_L,A MOV A,0 ADDC A,JULI_H MOV JULI_H,AJULISUAN2:RET 。入口:R5(高位)R4(低位),(高位)R2(低位),非零除數(shù)。出口:R5(高位)R4(低位),商R7(高位)R6(低位),余數(shù)DUDIV: CLR A 。部分余數(shù)單元清零 MOV R7,A MOV R6,A MOV R0,10H 。除法移位次數(shù)LP: CLR C 。移位 MOV A,R4 RLC A MOV R4,AMOV A,R5RLC A MOV R5,A MOV A,R6 RLC A MOV R6,A MOV A,R7 RLC A MOV R7,ALP1: MOV A,R6 。部分余減除數(shù) SUBB A,R2 MOV R1,A MOV A,R7 SUBB A,R3 JC SMALL MOV R7,A MOV A,R1 MOV R6,A INC R4 。商加1 SJMP LP1SMALL: DJNZ R0,LP MOV 20H,R7 。四舍五入 JB 07H,ADD1 CLR C MOV A,R6 RLC A MOV R6,A MOV A,R7 RLC A SUBB A,R3 JC RETURN JNZ ADD1 MOV A,R6 SUBB A,R2 JC RETURNADD1: MOV A,R4 。商加1 ADD A,01H MOV R4,A MOV A,R5 ADDC A,00H MOV R5,ARETURN: RET。入口:R5(高位)R4(低位),(高位)R2(低位),乘數(shù).。出口:R1(積的低位字節(jié)地址指針)DUMUL: MOV A,R1 。復(fù)制保存地址指針 MOV R6,A MOV R7,04HCLEAR: MOV @R1,00H 。積單元清零 INC R1 DJNZ R7,CLEAR MOV A,R6 MOV R1,AMM: MOV A,R2 。R2*R4 MOV B,R4 MUL AB ACALL ADDM1 MOV A,R2 。R2*R5 MOV B,R5 MUL AB ACALL ADDM1 MOV A,R3 。R3*R4 MOV B,R4 MUL AB ACALL ADDM1 MOV A,R3 。R3*R5 MOV B,R5 MUL AB ACALL ADDM1 MOV A,R6 ?；謴?fù)地址指針 MOV R1,A RETADDM1: ADD A,@R1 。加部分積 MOV @R1,A MOV A,B INC R1 ADDC A,@R1 MOV @R1,A INC R1 MOV A,@R1 ADDC A,00H MOV @R1,A DEC R1 RET
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鄂ICP備17016276號-1