loop delay without initial startup delay

Projects Programming
1

I have this line so that everything will only happen once per minute:

if (millis() - loopMillis > 60000UL) { //do every minute

Is there a simple way to change it so that it will run initially on startup, so it doesn't have to wait the first minute? I could put every in the setup, too, but there's a lot of code happening-pretty much my whole loop code.

2

Just run it in setup as you mentioned.

3

Or set the initial value of loopMillis to 60001UL

If you decide to do the initial code execution from setup() then put the code that is triggered each minute into a function and call that from setup() then call it from loop() once the minute has elapsed.

4

when you declare a value for loopMillis so that the first check passes.
unsigned long loopMillis = 0xffff0217;

So if millis() returns 3000 after the bootloader runs and your sketch starts up, then
3000 = 0xbb8
0xbb8 - 0xffff0217 = 0x000109a1 = 68004 decimal, which is >60000UL.

Should do the trick.

5

I just thought of moving everything to a separate function, that could be called from setup, as well as loop. But I like the sneaky definition of loopMillis the best! Thanks.

6

@Crossroards
Very nice woz.

7

Thanks 8)