hi , im very new to assembly langauge and im doing a unit at college on it. my assignment is to write a program that would simulate a pelican crosing. ive had a good go at writting it but when i load it into the assembler it comes up with erros. th sequence should go TURN ON GREEN LED DELAY TURN ON AMBER LED ON SMALL DELAY TURN RED LED ON AND SOUND A BUZER DELAY FLASH AMBER LED ON AND OF ive had a go at the program up to the buzer but im a bit confused to whi it isent workong. p3 is port 3 of the robot is a bank of leds and port 2.7 is the buzzer. if you need any more information then just say. many thanks laura Code: main1() { #pragma asm start: mov P3, #0Dfh ;// turn on green led// mov r7, #0ffh ;// move ffh to reg 7 ( DELAY)// outerloop1: mov r6, #0ffh ;// move ffh to reg 6 (DELAY)// innerloop1: mov r5, #0ffh inner: djnz r5 inner djnz r6 innerloop1 djnz r7 outerloop1 mov P3, #0bfh ;// turn amber led on // mov r7, #3fh ;// move ffh to reg 7// outerloop2: mov r6, #0ffh ;// move ffh to reg 6// innerloop2: mov r5, #0ffh inner2: djnz r5 inner2 djnz r6 innerloop2 djnz r7 outerloop2 mov P3, #7fh ;// turn red led on // counter: mov P2, #80h ;// siren on // ACALL, delay: ;// (delay)// mov P2, #00h ;// siren off// ACALL, delay: ;// (delay)// delay: mov r2, #0fh ;// move ffh to reg 6// innerloop8: mov r1, #0ffh ;// move ffh to reg 5// inner8: djnz r1 inner8 djnz r2 innerloop8 ret counter: mov r7, #0fh ;// move 0fh to reg 7// counter1: mov r6, #0ffh ;// move ffh to reg 6// counter2: mov r5, #0ffh ;// move ffh to reg 5// counter3: djnz r5 counter1 djnz r6 counter2 djnz r7 counter3 ret mov P3, #0bfh ;// turn amber led on // #pragma endasm }
i dont know anything about the traffic lights. please tell me how it is working. is it automatic or manual?