超聲波避障果園噴霧機器人自動避障設計畢業論文-資料下載頁

　　

【正文】 高位為零，不點亮JJ0: MOV A, R0 MOV R4, A MOV A, R1 MOV R5, A MOV R3, 00D MOV R2, 100D LCALL DIV4BY2 MOV 41H, R4 MOV A,41H JNZ JJ1 MOV A,40H 。次高位為0，先看最高位是否為不亮 SUBB A,0AH JNZ JJ1 MOV 41H,0AH 。最高位不亮，次高位也不亮JJ1: MOV A, R0 MOV R4, A MOV A, R1 MOV R5, A MOV R3, 00D MOV R2, 10D LCALL DIV4BY2 MOV 42H, R4 MOV A,42H JNZ JJ2 MOV A,41H 。次次高位為0，先看次高位是否為不亮 SUBB A,0AH JNZ JJ2 MOV 42H,0AH 。次高位不亮，次次高位也不亮JJ2: MOV 43H, R0 POP B POP PSW POP ACC RET。****************************************************。* 兩字節無符號數乘法程序 *。****************************************************。 R7R6R5R4 = R3R2 * R1R0。MUL2BY2: CLR A MOV R7, A MOV R6, A MOV R5, A MOV R4, A MOV 46H, 10HMULLOOP1: CLR C MOV A, R4 RLC A MOV R4, A MOV A, R5 RLC A MOV R5, A MOV A, R6 RLC A MOV R6, A MOV A, R7 RLC A MOV R7, A MOV A, R0 RLC A MOV R0, A MOV A, R1 RLC A MOV R1, A JNC MULLOOP2 MOV A, R4 ADD A, R2 MOV R4, A MOV A, R5 ADDC A, R3 MOV R5, A MOV A, R6 ADDC A, 00H MOV R6, A MOV A, R7 ADDC A, 00H MOV R7, AMULLOOP2: DJNZ 46H, MULLOOP1 RET。****************************************************。* 四字節/兩字節無符號數除法程序 *。****************************************************。R7R6R5R4/R3R2=R7R6R5R4(商)...R1R0(余數)。DIV4BY2: MOV 46H, 20H MOV R0, 00H MOV R1, 00HDIVLOOP1: MOV A, R4 RLC A MOV R4, A MOV A, R5 RLC A MOV R5, A MOV A, R6 RLC A MOV R6, A MOV A, R7 RLC A MOV R7, A MOV A, R0 RLC A MOV R0, A MOV A, R1 RLC A MOV R1, A CLR C MOV A, R0 SUBB A, R2 MOV B, A MOV A, R1 SUBB A, R3 JC DIVLOOP2 MOV R0, B MOV R1, ADIVLOOP2: CPL C DJNZ 46H, DIVLOOP1 MOV A, R4 RLC A MOV R4, A MOV A, R5 RLC A MOV R5, A MOV A, R6 RLC A MOV R6, A MOV A, R7 RLC A MOV R7, A RET。delay_250: push psw push 07h mov r7,0ffhdelay_250_1: nop nop nop nop djnz r7,delay_250_1 pop 07h pop psw ret 。 END