How to break out of a loop when data arrives on and InputPort?

Squirrel Code
1

Hey guys,

I’m a bit of a newbie, so bear with me.

I have my imp controlling an RGB LED with PWM. The LED can morph between different colors.

You program it using a form on a webpage where you can input new colors to morph to. The morphing happens inside of a “while(1){…}” loop, so it repeats on and on forever.

The problem is that when a new message arrives from the web form over the input port, the imp is stuck inside of its color-morphing loop. How do I get it to break out of the loop when a new message comes in from the web?

Thanks!

2

The answer is, you can’t… you shouldn’t have a while(1) loop for your morphing.

You should instead use wakeup to call your morph routine on every loop, eg:

`function morph() {
imp.wakeup(0.02, morph);
// set leds here
}

// Start callbacks at 50Hz
morph();`

Every time morph runs, it re-queues itself to run 20ms later. As control falls out of the loop and back to the OS, TCP data gets processed and incoming messages can be dealt with.

3

Awesome, thanks!