一种简单串行鼠标控制的单片机实现.doc

5.（1786）一种简单串行鼠标控制的单片机实现完整的程序清单如下：. 完整的程序清单如下： ORG 0000H AJMP MAIN ORG 0023H AJMP RTSD ORG 0030HMAIN: MOV SP,#60H MOV R1,#00H ;X方向指针 MOV R2,#00H ;X方向移动记数 MOV R3,#00H ;Y方向指针 MOV R4,#00H ;Y方向移动记数 MOV R7,#00H ;循环延时指针 MOV TMOD,#20H ;置T1工作方式2 MOV TL1,#0E8H ;置1200波特率相应的时间常数 MOV TH1,#0E8H MOV SCON,#40H MOV PCON,#00H SETB EA ;CPU开中断 SETB ES SETB TR1 MOV A,#0CDH MOV SBUF,A MOV R0,#32H ;数据发送指针(R0) SETB 18H ;18H为左右键上次发送时的状态 SETB 19H ;19H为左右键上次发送时的状态 CLR 11H ;鼠标动标志初始化 SETB 10H;读鼠标左右上下移动初始状态MOVT: JB P1.2,MT1 ;读取左右移动初始化状态 JB P1.3,MT2 ;并设定标志位 MOV 20H,#01H AJMP JUDGMT1: JB P1.3,MT3 MOV 20H,#02H AJMP JUDGMT3: MOV 20H,#04H AJMP JUDGMT2: MOV 20H,#08HJUDG: JB P1.4,CON1 ;读取上下移动初始化状态 JB P1.5,CON2 ;并设定标志位 MOV 21H,#01H AJMP LOOPCON1: JB P1.5,CON3 MOV 21H,#02H AJMP LOOPCON3: MOV 21H,#04H AJMP LOOPCON2: MOV 21H,#08H;初始化结束后进入正常扫描状态;左右移动扫描LOOP: JB 00H,AOP JB 01H,BOP JB 02H,COP JB 03H,DOOPAOP: JB P1.2,AOP1 JB P1.3,AOP2 MOV 20H,#01H AJMP KOOPAOP1: JB P1.3,ERRA MOV 20H,#02H INC R1 CJNE R1,#04H,AP1 MOV R1,#00H INC R2AP1: AJMP KOOPAOP2: MOV 20H,#08H ;否则为负(0) DEC R1 CJNE R1,#0FCH,AP2 MOV R1,#00H DEC R2AP2: AJMP KOOPERRA: MOV R1,#00H MOV 20H,#04H ;扫描错误处理 AJMP KOOPBOP: JNB P1.2,BOP1 JB P1.3,BOP2 MOV 20H,#02H AJMP KOOPBOP1: JB P1.3,ERRB MOV 20H,#01H DEC R1 CJNE R1,#0FCH,BP1 MOV R1,#00H DEC R2BP1: AJMP KOOPBOP2: MOV 20H,#04H INC R1 CJNE R1,#04H,BP2 MOV R1,#00H INC R2BP2: AJMP KOOPERRB: MOV R1,#00H MOV 20H,#08H AJMP KOOPDOOP: AJMP DOPCOP: JNB P1.2,COP1 JNB P1.3,COP2 MOV 20H,#04H AJMP KOOPCOP1: JNB P1.3,ERRC MOV 20H,#08H INC R1 CJNE R1,#04H,CP1 MOV R1,#00H INC R2CP1: AJMP KOOPCOP2: MOV 20H,#02H DEC R1 CJNE R1,#0FCH,CP2 MOV R1,#00H DEC R2CP2: AJMP KOOPERRC: MOV R1,#00H MOV 20H,#01H AJMP KOOPDOP: JB P1.2,DOP1 JNB P1.3,DOP2 MOV 20H,#08H AJMP KOOPDOP1: JNB P1.3,ERRD MOV 20H,#04H DEC R1 CJNE R1,#0FCH,DP1 MOV R1,#00H DEC R2DP1: AJMP KOOPDOP2: MOV 20H,#01H INC R1 CJNE R1,#04H,DP2 MOV R1,#00H INC R2DP2: AJMP KOOPERRD: MOV R1,#00H MOV 20H,#02H;上下移动扫描KOOP: JB 08H,AAOP JB 09H,BBOP JB 0AH,CCOP JB 0BH,DDOPAAOP: JB P1.4,AAOP1 JB P1.5,AAOP2 MOV 21H,#01H AJMP KENDAAOP1: JB P1.5,EERA MOV 21H,#02H INC R3 CJNE R3,#04H,AAP1 MOV R3,#00H INC R4AAP1: AJMP KENDAAOP2: MOV 21H,#08H DEC R3 CJNE R3,#0FCH,AAP2 MOV R3,#00H DEC R4AAP2: AJMP KENDEERA: MOV R3,#00H MOV 21H,#04H ;扫描错误处理 AJMP KENDBBOP: JNB P1.4,BBOP1 JB P1.5,BBOP2 MOV 21H,#02H AJMP KENDBBOP1: JB P1.5,EERB MOV 21H,#01H DEC R3 CJNE R3,#0FCH,BBP1 MOV R3,#00H DEC R4BBP1: AJMP KENDBBOP2: MOV 21H,#04H INC R3 CJNE R3,#04H,BBP2 MOV R3,#00H INC R4BBP2: AJMP KOOPEERB: MOV R3,#00H MOV 21H,#08H AJMP KENDDDOP: AJMP DDPPCCOP: JNB P1.4,CCOP1 JNB P1.5,CCOP2 MOV 21H,#04H AJMP KENDCCOP1: JNB P1.5,EERC MOV 21H,#08H INC R3 CJNE R3,#04H,CCP1 MOV R3,#00H DEC R4CCP1: AJMP KENDCCOP2: MOV 21H,#02H DEC R3 CJNE R3,#0FCH,CCP2 MOV R3,#00H DEC R4CCP2: AJMP KENDEERC: MOV R3,#00H MOV 21H,#01H AJMP KENDDDPP: JB P1.4,DDOP1 JNB P1.5,DDOP2 MOV 21H,#08H AJMP KENDDDOP1: JNB P1.5,EERD MOV 21H,#04H DEC R3 CJNE R3,#0FCH,DDP1 MOV R3,#00H DEC R4DDP1: AJMP KENDDDOP2: MOV 21H,#01H INC R3 CJNE R3,#04H,DDP2 MOV R3,#00H INC R4DDP2: AJMP KENDEERD: MOV R3,#00H MOV 21H,#02H;正常扫描一次结束KEND: JNB 10H,NXD ACALL JNCE ;调判断有无键按下及鼠标移动子程序 JNB 11H,NSEND INC R7 CJNE R7,#64H,NSEND MOV R7,#00H ACALL PANDNXD: JNB 1FH,NSEND ;三字节数据发送完标志 SETB 10H ACALL SHSD ;调数据处理与发送程序NSEND: AJMP LOOP;串口中断程序RTSD: CLR TI INC R0 CJNE R0,#33H,GOON SETB 1FH AJMP QUITGOON: MOV A,R0 MOV SBUF,A CLR 1FHQUIT: RETI;判断有无键按下,释放及移动子程序JNCE: JNB 18H,FYT JNB P1.6,SEND AJMP XIA1FYT: JB P1.6,SEND AJMP XIA1XIA1: JNB 17H,FF1 JNB P1.7,SEND AJMP XIA2FF1: JB P1.7,SEND AJMP XIA2XIA2: CJNE R2,#00H,SEND CJNE R4,#00H,SEND AJMP NENDSEND: SETB 11HNEND: RET;数据处理与发送子程序SHSD: MOV A,R2 ANL A,#3FH ORL A,#80H ;字节的最高位置1，（第一个停止位） MOV 31H,A MOV A,R4 ANL A,#3FH ORL A,#80H ;字节的最高位置1，（第一个停止位） MOV 32H,A MOV A,#0C0H JNB P1.6,CHAN1 CLR ACC.5 SETB 18H AJMP CHAN2CHAN1: CLR 18H SETB ACC.5CHAN2: JNB P1.7,CHAN3 CLR ACC.4 SETB 19H AJMP CHAN4CHAN3: CLR 19H SETB ACC.4CHAN4: MOV R5,A MOV A,R2 RL A RL A ANL A,#03H MOV R2,A MOV A,R4 SWAP A ANL A,#0CH ORL A,R2 ORL A,R5 MOV SBUF,A MOV R0,#30H MOV R2,#00H MOV R4,#00H RET;延时后确认有无