单片机控制直流电机正反转

单片机控制直流电机正反转原理图LUdPN*1Z2PM+1Z2□2PM+122R-1+k7nC3至3=:3735王办H3JZZ1JZ3C1 rII15LUdPN*1Z2PM+1Z2□2PM+122R-1+k7nC3至3=:3735王办H3JZZ1JZ3C1 rII15F11£BMM| 1C2□1PM+122卜XTRL1pnn'.H.raPD.WAD1PD^i'h.DZKTAI3PD*WAIY1PD.+l，.H.[l+pnsi'.H.reP□.&.««p!=：TpzafisP2.1i'hSFZZi'A-n叩湛HFZ^A11RLEP2皿12*PZSAT3FZ.S,.h.1+P27/A1SPinP3IVRXDF11P3irn<DPINpma出II1P123Fl.P3*/iriPiSP3^T1P1SP1.7Pl.TiTOSBQ3如上图所示包括单片机的最小系统，同时用到了4个PNP三极管，通过控制P1.3,P1.4和P2.2P2.4的电平的高低从而分别控制三极管的导通和断开.当P1.3=1，P1.4=0时；三极管Q1导通，Q2断开；P2.2=1，P2.4=0；三极管Q3导通，Q4断开；此时直流电机正转.当P1.3=0，P1.4=1时；三极管Q1断开，Q2

导通；P2.2=0,P2.4=1;三极管Q3断开，Q4导通；此时直流电机反转，并且用到了两个按键key1和key2分别控制其正转和反转程序如下:#include<reg52.h>#defineuintunsignedint#defineucharunsignedcharsbitdl=pr3;sbitd2=Pr4;sbitd3=P2A4;sbitd4=P2A2;sbitkeyl=P3"4;sbitkey2=P3；5;voiddelay(uintz)uintKjy;for(z=z;k>0;k一)} for(y=l10;y>0;y--);whil巳(1)if(keyl==0){whil巳(1)if(keyl==0){delay(5);if(keyl==0){whilst!key1);dl=0;d2=l;d3=l;d4=0;while(keyl&&key2);9012345678901234=9012345678901234=：•，…，•=……：…EFFFT7788838-333435363738394041424344454647484950515253545556575859606162636465666711----1X-TA也室4=f(V.TZIdd己iif(keyl!=0||key2!=0){dl=O;d2=l;d3=l;d4=0;while(key1 ey2);u}if(key2—0){delay(5);if(key2==0){while(!key2);dl=l;d2=0;d3=0;d4=l;whi1e(key2&^key1);delay(5);}if(key2==0){、delay(5);if(key2==0)delay(5);if(keyl—0){while(!keyl);dl=0;d2=l;d3=l:*—fa