Schematic
Code
/* This program demonstrates, control of 2 DC Motors using L293D Driver. Four switches connected to P1 Drive 2 motors connected to P2. For more details visit the tutorial Page:http://exploreembedded.com/wiki/*/ #include<reg51.h> #define Motors P2 #define Switches P1 #define Forward 0x05 #define Backward 0x0a #define Left 0x06 #define Right 0x09 #define stop 0x00 void main() { unsigned char SwitchInput; Switches = 0x0f; //Configure Switches as Input Motors = 0X00; //Configure both Motors as Output. while(1) { SwitchInput = (0x0f & Switches);//read switch status and mask lower byte. switch(SwitchInput) { case 1: Motors = Forward; break; case 2: Motors = Backward; break; case 4: Motors = Left; break; case 8: Motors = Right; break; default: Motors =stop; } } }