【正文】 FFH 。指向記數(shù)器20235 MOV A, OCH0237 MOVX @DPTR, A 。寫入分頻數(shù)120238 MOV A, 00H023A MOVX @DPTR, A023B MOV DPTR, 3FFFH 。初始化控制從動機 的8253023E MOV A. 36H0240 MOVX DPTR, A 。置8253三個計數(shù) 器方式30241 MOV DPTR, 760243 MOVX @DPTR, A0244 MOV A, B6H0246 MOVX @DPTR, A0247 MOV DPTR, 39FFH 。指向記數(shù)器0024A MOV A, 07H024C MOVX @DPTR, 39FFH 。寫入分頻數(shù)7024D MOV A, 00H024F MOVX @DPTR, A0250 MOV DPTR, 3DFFH 。指向記數(shù)器20253 MOV A, OCH 0255 MOVX @DPTR, A 。寫入分頻數(shù)120256 MOV A, 00H0258 MOVX @DPTR, A 0259 MOV TMOD, 55H ；置8031定時和中斷方式025C MOV TH1, 00H025F MOV TL1, 00H0262 MOV TH0, 00H0265 MOV TL0, 00H0268 MOV TCON, 55H026B MOV IE, 85H026E MOV C, ；取轉(zhuǎn)向控制信息0270 MOV 00H, C0272 MOV A, 20H0274 ANL A, 01H0276 MOV 70H, A0278 MOV , C‘027A LOOP20: MOV C, ；啟動嗎？ 沒有等待 027C JC LOOP20027E CLR 0280 LOOP7: MOV A, 01H ；送測主機速命令0282 MOV DPTR, 1FFFH0285 SETB 0287 MOV R0, 02H0289 MOV R1, 2BH028B MOV 34H, 60H028E MOV 35H, 61H0291 LCALL ZSCL 。調(diào)轉(zhuǎn)速處理子程序0294 MOV A, 02H0296 MOV DPTR, 1FFFH ；送測從機轉(zhuǎn)速命令0299 SETB 029B MOV R0, 01H029D MOV R1, 3BH029F MOV 35H, 62H02A5 LCALL ZSCL ；調(diào)轉(zhuǎn)速處理子程序02A8 LOOP9: MOV C, 02AA JC LOOP11 ；停機？不停機取02AC MOV C, 02AE MOV 10H, C ； 轉(zhuǎn)向信息02B0 MOV A, 22H02B2 ANL A, 01H02B4 XRL A, 70H02B6 JZ LOOP2002B8 CLR C02B9 MOV A, 41H 。 新的轉(zhuǎn)向信息02BB LOOP14: SUBB A, 01H02BD MOV 43H, A ；減小主從機fFCT02BF ANL A, 0FH02C1 SUBB A, 0AH02C3 JC LOOP13 。 新的轉(zhuǎn)向信息送 475202C5 MOV A, 43H02C7 SUBB A, 06H02C9 LOOP15。 MOV DPTR, A02CC MOVX @DPTR, A02CD MOV DPTR, 3101H02D0 MOVX @DPTR, A02D1 CJNE A, 01H,LOOP1402D4 MOV C, 10H02D6 MOV , C02D8 LJMP LOOP702D8 LOOP13: MOV A, 43H02DD SJMP LOOP1502DF LOOP11: CLR EX1 ；停機處理程序 02E1 CLR EX002E3 SETB 。禁止中斷02E5 MOV A, 41H02E7 CLR C02E8 LP11: SUBB A, 01H 。減小主從機fFCT 02EA MOV 44H, A 。返回開始端02EC ANL A, 44H02EE JC LP1002F0 MOV A. 44H02F2 SUBB A, 06H02F4 LP12: MOV DPTR, 3102H02F7 MOVX @DPTR, A02F8 MOVX @DPTR, A02FC CJNE A, 01H, LP1102FF LJMP START0302 LP10: MOV A, 40H0304 SJMP LP120306 BCD: MOV A, 49H 。二十進制轉(zhuǎn)換子程序0308 MOV B, 64H030B DIV AB 。入口49H030C MOV 42H, A030E MOV A, 49H 。出口。百位42H 十個位41H 0310 XCH A, B0312 DIV AB0313 SWAP A0314 ADD A, B0316 MOV 41H, A0318 RET0319 ZSCL: MOV A, 35H 。轉(zhuǎn)速處理子程序031B CJNE A, 34H, LOOP2032E SJMP LOOP30320 LOOP2: CLR C0321 SUBB A, 34H 。取△w0323 MOV 39H, A 0325 JC LOOP4 ?！鱳0? 0327 SUBB A, 37H0329 JC LOOP4032B SJMP LOOP5032D LOOP4: MOV 38H, A032F MOV A, 00H 。 取∣△w∣0331 CLR C0332 SUBB A, 38H0034 SJMP LOOP60036 LOOP5: MOV A, 35H0038 SUBB A, 37H003A LJMP LOOP7003D LOOP6: SUBB A, 37H ；△w△wm?033F JC LOOP30341 MOV A, 35H 。不大于w=wm+△w0343 ADD A, 37H0345 LJMP LOOP7 。 大于w=wm+△w0348 LOOP3: MOV A, 34H034A MOV 49H, A 034C LCALL BCD 。轉(zhuǎn)換成十進制034F MOV A, 34H0351 MOV DPL, R00353 MOV DPH, 31H ；送到相應(yīng)控制口0356 MOVX @DPTR, A0357 CJNE A, 14H, LOOP8 ；高頻嗎？035A LOOP10: MOV DPH, R1035C