Traffic light controller 8051 in proteus ||Demo video
In this video I have just shown the working of traffic light controller.
I will upload full video in sometime mean while have a look at the code
org 0000h
ljmp start
org 0200h
start:clr p0.0; set red led
setb p0.1;off yellow
setb p0.2;off green
lcall delayfor10;generate a delay of 10 sec
clr p0.1;yellow led on indicating red will turn off in sometime
lcall delayfor5;delay for yellow led
setb p0.0;off the red led
setb p0.1;off yellow led
clr p0.2;turn on green led
lcall delayfor10;delay for 10sec
clr p0.1;turn on yellow led for indicating the green will turn on
lcall delayfor5;delay for 5 sec
sjmp start;again repeat the same process
org 1500h
delayfor10:mov tmod,#01h;initilize the timer
mov r0,#152;
back: mov tl0,#00h;
mov th0,#00h;
setb tr0;
check:jnb tf0,check
clr tf0;
clr tr0;
djnz r0,back
ret;
org 1700h
delayfor5:mov tmod,#01h;initilize the timer
mov r0,#76;
back1: mov tl0,#00h;
mov th0,#00h;
setb tr0;
check1:jnb tf0,check1
clr tf0;
clr tr0;
djnz r0,back1
ret;
end;
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