countdown timer?

[cursed666]

hi how do you make a countdown timer? cus currently i use several timers wich start every second but somehow it often get's screwed up =/

does anyone know how to make a better timer?

i currently got it like this(it's a small part of my code and pretty buggy somehow)

#Screen Time
if(clk("30")) {TLeft = 30,timer("29",900)}
if(clk("29")) {TLeft = 29,timer("28",900)}
if(clk("28")) {TLeft = 28,timer("27",900)}
if(clk("27")) {TLeft = 27,timer("26",900)}
if(clk("26")) {TLeft = 26,timer("25",900)}
if(clk("25")) {TLeft = 25,timer("24",900)}
if(clk("24")) {TLeft = 24,timer("23",900)}
if(clk("23")) {TLeft = 23,timer("22",900)}
if(clk("22")) {TLeft = 22,timer("21",900)}
if(clk("21")) {TLeft = 21,timer("20",900)}
if(clk("20")) {TLeft = 20,timer("19",900)}
if(clk("19")) {TLeft = 19,timer("18",900)}
if(clk("18")) {TLeft = 18,timer("17",900)}
if(clk("17")) {TLeft = 17,timer("16",900)}
if(clk("16")) {TLeft = 16,timer("15",900)}
if(clk("15")) {TLeft = 15,timer("14",900)}
if(clk("14")) {TLeft = 14,timer("13",900)}
if(clk("13")) {TLeft = 13,timer("12",900)}
if(clk("12")) {TLeft = 12,timer("11",900)}
if(clk("11")) {TLeft = 11,timer("10",900)}
if(clk("10")) {TLeft = 10,timer("9",900)}
if(clk("9")) {TLeft = 9,timer("8",900)}
if(clk("8")) {TLeft = 8,timer("7",900)}
if(clk("7")) {TLeft = 7,timer("6",900)}
if(clk("6")) {TLeft = 6,timer("5",900)}
if(clk("5")) {TLeft = 5,timer("4",900)}
if(clk("4")) {TLeft = 4,timer("3",900)}
if(clk("3")) {TLeft = 3,timer("2",900)}
if(clk("2")) {TLeft = 2,timer("1",900)}
if(clk("1")) {TLeft = 1,timer("0",900)}
if(clk("0")) {Tleft = 0}

already thanks for the help

[Matte]

You only need one timer. Use

@inputs Start
@outputs Timeleft
@persist N
interval(N)

if(Start){
N = 1000
Timeleft = 30
}

if(Timeleft > 0){
if(clk()){Timeleft--}
}else{N = 0}

Wire a non-toggled button to Start. Timeleft outputs the timer.

[cursed666]

could you please explain it a bit?
i don't really know how it works and what it exactly does exept that if start (which is the button) get's activated it'll get something with Timeleft 30 and if timeleft is greater than 0 it'll clock timeleft -- (asfar as i remember it means -1) untill it's 0 O-o is that right? or am i just messed up?

and it starts should start with a timer or something cus it start's if "Safe" is not equal to 1 and it doesnt work with if(Safe != 1) {} stuff to start it =/ i also tried a simple timer between it but i got no idea how to get it to work D: could someone tell me how?

[Matte]

interval(N)

This sets the interval to the variable N. The interval is an inbuilt timer in the E2, and the number in the interval function decides how many milliseconds the E2 should wait before executing again.

if(Start){
N = 1000
Timeleft = 30
}

If the button is pressed, this sets the variable N (the interval) to 1000 (one second). It also resets the Timeleft variable to 30.

if(Timeleft > 0){
if(clk()){Timeleft--}
}else{N = 0}

If the Timeleft variable is greater than 30 and this execution was caused by the interval, then Timeleft is decremented by one(Timeleft-- is the same as Timeleft = Timeleft - 1). If Timeleft is equal to 0 then it stops the expression from counting down by setting N (interval) to 0.

[cursed666]

yeah but it doesnt work yeah for me since i use some toggle value i think?

[Matte]

That expression was meant for non-toggled buttons..

For toggled buttons use:

@inputs Start
@outputs Timeleft
@persist N
interval(N)

if(~Start&Start){
N = 1000
Timeleft = 30}

if(Start){

if(Timeleft > 0){
if(clk()){Timeleft--}
}}else{N = 0}

[cursed666]

thanks alot is there a way to stop it btw? since reset() resets the whole E2 so how could i instantly shut it down or set it to 0 or reset to 30 xD?

[Matte]

Add this line:

if(Reset){
N = 0
Timeleft = 30}

[Nicolai1]

The way I do countdown timers is usually this:

@inputs Run ResetTo
@outputs Time
@persist Time2
interval(100)
Time2 = (Time2 + 0.1) * Run
Time = max(abs(Time2-ResetTo), 0)

When Run is false (0) it will reset to whatever value you have inputted to the ResetTo value.
When Run is true (1) it will count down until it hits 0 and then stop.