单片机课程设计报告-pwm直流电动机调速

单片机设计报告（PWM直流电动机调速）组员一、设计原理本设计运用单片机芯片STC89C52，通过控制单片机输出引脚P13输出的高低电平的延时时间长短来达到控制电机的目的,运用单片机定时器/计数器1对光电编码盘产生的脉冲进行计数，将所得到的数值送到P0口显示。2、设计方案比较采用PWM控制电机的方法有两种方案一本实验要求周期为50HZ，占空比2080可调，程序中设置初始值，通过按键对占空比进行逐次加一减一来实现对电动机的控制，但由于调节幅度太小，不易察觉，故方案不可行。方案二、程序中将要调节的几个占空比预先设定好，通过间接寻址，来改变延时时间达到控制电动机的目的。3、程序设计本设计采用查询与中断结合，控制电机采用查询P1口状态，测速显示采用外部中断0控制。加速、减速通过查询按键状态来控制程序跳转到相应的子程序去执行，改变延时时间来控制电机。显示通过外部中断0控制。4、硬件电路设计电路图如下D01D23D45D6713S1S4S5L1L2L31234AD0D7D1D2D5D6D3D4423030AL1L3L2S1S4S5XTAL218XTAL119ALE30EA31PSEN29RST9P0/AD039P01/A138P02/AD237P03/A336P04/AD435P05/A534P06/AD63P07/A732P101P12P123P134P145P156P167P178P30/RXD10P31/TX1P32/INT012P3/IT113P34/T014P37/RD17P36/W16P35/T115P27/A1528P20/A821P21/A92P2/A1023P23/A124P24/A1225P25/A1326P26/A1427U1AT89C51234567891RP1RESPACK8启动加速减速启动88Q13PN4141D41N4148D51N4148加速减速12U2A74HC1434U2B74HC1465412U3OPTOCOUPLERNPNR420RR520R0D02D13D24D35D46D57D68D79Q019118Q217316Q415514Q613712LE1OE1U474HC573C110UR610KABCDD6LEDREDD1LEDREDD2LEDREDR120RR220RR320RR71KR81KR91K5、设计流程如下是否否是是主程序开始按键是否按下P10实现加速P11实现减速电机保持占空比50的速度运行中断流程如下是判断与P32连接的按键是否按下进入中断服务子程序保护现场调用计数并定时调用显示恢复现场六、程序设计如下ORG0000HAJMPMAINORG0003HAJMPXSORG0030HMAINMOVSP,3FHMOV27H,05HMOV20H,0AH定时时间设定MOV21H,04HMOV22H,08HMOV23H,0C0HMOV24H,0F0HMOV30H,04HMOV31H,08HMOV32H,0C0HMOV33H,0F0HMOV34H,0AHMOVR1,20H设置所查询时间间接寻址的地址MOVR0,34HMOVR4,27H设置按键次数MOVIE,89H开启中断SETBIE0START1JNBP10,UP查询按键是否按下JNBP11,DOWNMOVA,01HMOVC,ACC0MOVP13,CLCALLDELAY1调用延时CPLAMOVC,ACC0MOVP13,CLCALLDELAY2调用延时SJMPSTART1START2JNBP10,UP查询按键是否按下JNBP11,DOWNMOVA,01HMOVC,ACC0MOVP13,CLCALLDELAY2调用延时CPLAMOVC,ACC0MOVP13,CLCALLDELAY1调用延时SJMPSTART2DELAY1MOVTMOD,02H设置计数器的工作方式MOV25H,R1高（低）电平的延时时间MOVR2,05HMOVTH0,38HMOVTL0,38HSETBTR0LP0JBCTF0,LP1AJMPLP0LP1DJNZR2,LP0MOVR2,05HDJNZ25H,LP0RETDELAY2MOVTMOD,02HMOV35H,R0高（低）电平的延时时间MOVR2,05HMOVTH0,38HMOVTL0,38HSETBTR0LP2JBCTF0,LP3AJMPLP2LP3DJNZR2,LP2MOVR2,05HDJNZ35H,LP2RETUPDECR4CLRP15INCR1DECR0STAY1JBP10,SE1AJMPSTAY1SE1SETBP15MOVA,R4JNZSTART1SETBIE0AJMPMAINDOWNDECR4CLRP16INCR1DECR0STAY2JBP11,SE2AJMPSTAY2SE2SETBP16MOVA,R4JNZSTART2SETBIE0AJMPMAIN测速显示XSPUSHACCMOVA,R0PUSHACCMOVA,R1PUSHACCMOVA,R2PUSHACCMOVA,R3PUSHACCMOVA,R4PUSHACCMOVA,R5PUSHACCMOVA,R6PUSHACCMOVA,R7PUSHACCPUSH8CHPUSH8AHPUSHPSWMCJSMOVTCON,00HMOVTMOD,15H定时器1方式1MOVTL1,3CH设初值005SMOVTH1,0B0HMOVTH0,0MOVTL0,0SETBTR0SETBTR1SETBET0SETBEAZSZHMOVR6,TH0取脉冲数，R6高8，R7低8MOVR7,TL0MOVR1,0FFHLCALLDMULLCALLDISPPOPPSWPOP8AHPOP8CHPOPACCMOVR7,ACCPOPACCMOVR6,ACCPOPACCMOVR5,ACCPOPACCMOVR4,ACCPOPACCMOVR3,ACCPOPACCMOVR2,ACCPOPACCMOVR1,ACCPOPACCMOVR0,ACCRETI转速计算N60M/TM在T1，T005N1200M04B0HMDMULMOVR2,04HMOVR3,0B0HMOVA,R3MOVB,R7MULABXCHA,R7MOVR5,BMOVB,R2MULABADDA,R5MOVR4,ACLRAADDCA,BMOVR5,AMOVA,R6MOVB,R3MULABADDA,R4XCHA,R6XCHA,BADDCA,R5MOVR5,AMOVF0,CMOVA,R2MULABADDCA,R5MOVR5,ACLRAMOVACC0,CMOVC,F0ADDCA,BMOVA,R4RETDISPMOVDPTR,TABMOVA,R7ANLA,0FHMOVCA,ADPTRMOVP0,AMOVP2,0FFHMOVP2,0F7HLCALLDELAYMOVDPTR,TABMOVA,R7ANLA,0F0HSWAPAMOVCA,ADPTRMOVP0,AMOVP2,0FFHMOVP2,0FBHLCALLDELAYMOVDPTR,TABMOVA,R6ANLA,0FHMOVCA,ADPTRMOVP0,AMOVP2,0FFHMOVP2,0FDHLCALLDELAYMOVDPTR,TABMOVA,R6ANLA,0F0HSWAPAMOVCA,ADPTRMOVP0,AMOVP2,0FFHMOVP2,0FEHLCALLDELAYDJNZR1,DISPRETTABDB3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH,77H,7CH,39H,5EH,79H,71HRETDELAYMOVA,R6PUSHACCMOVA,R7PUSHACCLP6MOVR6,250LP4NOPNOPDJNZR6,LP4POPACCMOVR7,APOPACCMOVR6,ARETEND七、设计