單片機(jī)控制直流電機(jī)正反轉(zhuǎn)

單片機(jī)控制直流電機(jī)正反轉(zhuǎn)原理圖LUdPN*1Z2PM+1Z2□2PM+122R-1+k7nC3至3=:3735王辦H3JZZ1JZ3C1 rII15LUdPN*1Z2PM+1Z2□2PM+122R-1+k7nC3至3=:3735王辦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如上圖所示包括單片機(jī)的最小系統(tǒng)，同時(shí)用到了4個(gè)PNP三極管，通過(guò)控制P1.3,P1.4和P2.2P2.4的電平的高低從而分別控制三極管的導(dǎo)通和斷開(kāi).當(dāng)P1.3=1，P1.4=0時(shí)；三極管Q1導(dǎo)通，Q2斷開(kāi)；P2.2=1，P2.4=0；三極管Q3導(dǎo)通，Q4斷開(kāi)；此時(shí)直流電機(jī)正轉(zhuǎn).當(dāng)P1.3=0，P1.4=1時(shí)；三極管Q1斷開(kāi)，Q2

導(dǎo)通；P2.2=0,P2.4=1;三極管Q3斷開(kāi)，Q4導(dǎo)通；此時(shí)直流電機(jī)反轉(zhuǎn)，并且用到了兩個(gè)按鍵key1和key2分別控制其正轉(zhuǎn)和反轉(zhuǎn)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