Interrupting a WHILE or FOR loop

Software Development
#1

Using a WHILE loop will suspend any other processing by the Nextion, unless you have DOEVENTS added into the loop. That only refreshes the screen.

I have a countdown timer onscreen and want to be able to issue a STOP command from a screen press, but the Nextion doesn’t recognize it.

How could I make that work?

#2

Can’t you just disable the timer as follows:
tm0.en=0
which should stop the countdown time

#3

I don’t believe it’s possible to interrupt a loop with a touch event. I ‘want’ to be able to touch a ‘STOP’ button on the HMI to stop the countdown timer which is displaying on screen.

#4

Not sure if this helps but google ‘nextion while’ and look at youtube video ‘148 nextion’

#5

That video explains the loops, but not much help for what I need. I then discovered the ‘timer’ object and I think that will work perfectly!

#6

In your WHILE/FOR loop, check the tch0 and tch1 values. These indicate the current touch positions (x,y coords). If they indicate a valid touch location then “STOP”

#7

Didn’t know about those, I’ll check it out. Thanks!!