PROGRAM robo51.IAR #include ORG 0000H ;// RESET VECTOR // sjmp INIT interupt: ORG 0003H ;// INT0 vector address // mov P3, #0bfh ;// turn on ONLY led 3.6// INT0WAIT: jnb P3.2, INT0WAIT ;// WAIT FOR BUTTON RELEASE STEPPING// reti ;// return to program // ORG 0030H ;// START main program // INIT: mov IE, #81h ;// enables interrupts and enable external 0 interupt// start: mov P3, #0dfh ;// turn on ONLY led p3.5// acall Delay ;// delay // mov P3, #7fh ;// turn on ONLY led p3.7 // acall Delay ;// delay // sjmp start ;// jump to start // Delay: mov r7, #0fh ;// 2nd register of delay // d1: mov r6, #0ffh ;// 1st register of delay // d2: djnz r6, d2 djnz r7, d1 END