Blink LED with NG (Code-Sharing)

MIDIbox NG
1

Hey people,

I don’t have a question but I want to share this code.
I searched for a way to get a blinking LED within NG. Here is what it looks like:

EVENT\_BUTTON id=1 type=meta meta=runsection:2 button\_mode=Toggle EVENT\_LED id=1 dimmed=1 EVENT\_LED id=2000

And this is the NGR-part:

if ^section == 2 if BUTTON:1 == 127 set LED:2000 127 endif if BUTTON:1 == 0 set LED:2000 0 endif if LED:2000 == 127 set LED:1 64 delay\_ms 150 set LED:1 20 delay\_ms 150 exec\_meta RunSection:2 endif if LED:2000 == 0 set LED:1 20 endif endif

What it does is: It checks the status of the button 1. Please note that the button is set to “toggle”-mode. If it’s 127, LED:2000 which just acts as a value-storage is set to 127 and if that LED is 127, the loop is started. At the beginning of that loop the button-status is checked and as soon as it’s 0, the loop stops.

Best,
Chris

2

You could also do a “fade”:

if ^section == 2 if BUTTON:1 == 127 set LED:2000 127 endif if BUTTON:1 == 0 set LED:2000 0 endif if LED:2000 == 127 set LED:1 20 set LED:1 20 delay\_ms 20 set LED:1 25 delay\_ms 20 set LED:1 30 delay\_ms 20 set LED:1 35 delay\_ms 20 set LED:1 40 delay\_ms 20 set LED:1 45 delay\_ms 20 set LED:1 50 delay\_ms 20 set LED:1 55 delay\_ms 20 set LED:1 60 delay\_ms 20 set LED:1 64 delay\_ms 20 set LED:1 60 delay\_ms 20 set LED:1 55 delay\_ms 20 set LED:1 50 delay\_ms 20 set LED:1 45 delay\_ms 20 set LED:1 40 delay\_ms 20 set LED:1 35 delay\_ms 20 set LED:1 30 delay\_ms 20 set LED:1 25 delay\_ms 20 set LED:1 20 delay\_ms 20 exec\_meta RunSection:2 endif if LED:2000 == 0 set LED:1 20 endif endif

 

3

Hello Chris

That’s a nice way to have blinking LED, I use this kind of strategy in my NG

The drawback is that you can’t run another script and keep the blinking.

I start a topic/request long time ago to have a blinking mode at lower code level in mios, like a dynamic dimmed= mode

Hopefully one day

Best

Zam

4

Hm, good point!
I tried to implement such thing via RTOS… but this seems to be above my skills.

5

If you need help writing a new RTOS task(or something else, there’s some others ways to add a non-blocking delay), this is not a problem but in regular code only, and I really don’t know how to link it with the NG scripting syntax. But maybe one of you knows?

6

Hm…

I know how to create a meta-command. But I don’t know how to refer to a timer within a meta-command. Maybe you could explain how to set up a simple timer and I’ll see if I can implement that?

Thanks,
Chris

7

In your App.c

#define RESOLUTION 1000 // in uS #define TIMER\_NUM 1 // TIM3 #define TIMER\_PRIO MIOS32\_IRQ\_PRIO\_MID static void TIMER\_TIck(void); ///////////////////////////////////////////////////////////////////////////// // This hook is called after startup to initialize the application ///////////////////////////////////////////////////////////////////////////// void APP\_Init(void) { MIOS32\_TIMER\_Init(TIMER\_NUM, RESOLUTION, TIMER\_TIck, TIMER\_PRIO); } // This function will be called every ms static void TIMER\_TIck(void) { // Your function here }

This is MIOS32 ready to use Timer function.

1 Like
8

following with interest…

can be merged with this:

< base_url >/topic/19887-idearequest-led_mode/?do=embed

best

Zam