setTimeout, setInterval, setWatch logic

[espruino-discuss]

Posted at 2014-05-03 by Sacha

Hi Gordon,

Do i have to protect my function from calling twice in "parallel" ?
Let say i have a function that talks over an uart to a device. The communcation must happen in series and never parallel.

I call this function by setInterval/setTimeout and with setWatch. The protection is easy, i can set a variable inside the function at the beginning and clear it at the end ant checking for that.

I just want to know if it can happen.

Thanks

Sacha

[espruino-discuss]

Posted at 2014-05-03 by MrTimcakes

As i understand it the Espruino doesn't multitask all watches, intervals and timeouts happen one after another. I encounter this when i tried to do a watch on a button when i made an infinite loop, woops. Somthing like this wouldn't work.

setWatch(function(){console.log("test");}, BTN1, {repeat:true,edge:"rising", debounce:1/*ms*/});

while(1){

}

[espruino-discuss]

Posted at 2014-05-03 by DrAzzy

You don't have to to anything like that.

watches/timeouts/intervals do not interrupt other code that is running when the timeout/interval happens or the watched pin changes - they get queued up, and run after the other code is done.

[espruino-discuss]

Posted at 2014-05-03 by Sacha

Many thanks, that's perfect.

Sacha