[SOLVED] PIC32 external trigger

Created Thu, 03 Mar 2016 04:06:51 +0000 by jwzumwalt

jwzumwalt

Thu, 03 Mar 2016 04:06:51 +0000

How2 interrupt attachInterrupt()

Postby jwzumwalt » Tue Mar 01, 2016 4:37 pm I am trying to get attachInterrupt() to work in Pinguino. The interrupt is supposed to toggle the LED at reqular intervals.

The Arduino format for using attachInterrupt() is shown at

https://www.arduino.cc/en/Reference/AttachInterrupt

a simple example is shown

I tried 1 thru 14 for the interrupt number without success... any ideas?

int pin = 13;
int state = LOW;

void blink() {
  state = !state;
}

void setup() {
  pinMode(pin, OUTPUT);
  attachInterrupt(<1 thru 14>,blink,LOW);
}

void loop() {
  digitalWrite(pin, state);
}

How do I have an external pin event trigger a interrupt routine? I'm not picky about /RISING/FALLING, I'll settle for anything.

EmbeddedMan

Sat, 05 Mar 2016 00:53:54 +0000

Check out the first example on this page - maybe it will help you : https://github.com/fubarino/fubarino.github.com/wiki/Code-Examples

*Brian

jwzumwalt

Sat, 05 Mar 2016 05:41:12 +0000

Check out the first example on this page - maybe it will help you : https://github.com/fubarino/fubarino.gi ... e-Examples *Brian

After reviewing the above example you provided, it appears that the attachInterrupt() is not working with Pinguino. Can anyone else confirm this

majenko

Sat, 05 Mar 2016 12:46:28 +0000

The attachInterrupt works fine with the Pinguino micro.

I have tested all 5 interrupts and found where they are connected to:

• Interrupt 0 is connected to the button
• Interrupt 1 is connected to CONN1-14
• Interrupt 2 is connected to UEXT-6
• Interrupt 3 is connected to UEXT-5
• Interrupt 4 is connected to CONN1-13

jwzumwalt

Sun, 06 Mar 2016 23:49:20 +0000

Would you please post the program listing you used? thx

majenko

Mon, 07 Mar 2016 00:48:57 +0000

I don't have it now, but I will see if I can recreate it here:

void setled() {
    static bool lval = false;
    lval = !lval;
    digitalWrite(26, lval);
}

void setup() {
    pinMode(26, OUTPUT);
    attachInterrupt(0, setled, FALLING);
}

void loop() {
}

If I got the LED pin number right then pressing the user button should toggle the LED.

jwzumwalt

Mon, 07 Mar 2016 07:18:54 +0000

The above code did not seem to work. I modified the program to see if it was working and it does appear to lock up.

int lval = 0; int state = 0; void setled()

void setup() { pinMode(10, OUTPUT); pinMode(13, INPUT); attachInterrupt(0, setled, FALLING); }

void loop()

GastonLagaffe

Mon, 07 Mar 2016 08:38:48 +0000

Salut,

I tested it on my Olimex PIC32-Pinguino-Micro:

volatile int state = 1;

void blink() {
	state = !state;
}

void setup() {
	pinMode(PIN_LED1, OUTPUT);
	pinMode(PIN_LED2, OUTPUT);
	attachInterrupt(0, blink, FALLING);
}

void loop() {
	digitalWrite(PIN_LED2, state);
  digitalWrite(PIN_LED1,!digitalRead(PIN_LED1));
  delay(500);
}

Pushing the button will toggle the led, the second LED is only used to show that the processor is working (simple blink)

I hope, this helps.

Ciao, Mathias

jwzumwalt

Mon, 07 Mar 2016 15:45:02 +0000

YAHOOO!!!

It worked!

I did rearrange things to prove to myself the interrupt routine was doing the work Thanks, everyone for the help.

// green led blinks using loop delay.
// yellow led toggles if button pushed using interrupt routine

int state = 1;

void blink() {
   state = !state;
   digitalWrite(PIN_LED2, state);
}

void setup() {
   pinMode(PIN_LED1, OUTPUT);
   pinMode(PIN_LED2, OUTPUT);
   attachInterrupt(0, blink, FALLING);
}

void loop() {
  digitalWrite(PIN_LED1,!digitalRead(PIN_LED1));
  delay(500);
}

GastonLagaffe

Mon, 07 Mar 2016 16:18:19 +0000

Great!

The Olimex documentation is a bit confusing as it refers to it more from a Pinguino point of view.

Ciao, Mathias

jwzumwalt

Mon, 07 Mar 2016 16:36:15 +0000

I primarily use the Pinguino.cc IDE and I just discovered that half my problem is UECIDE IDE and Pinguino.cc IDE do not use the same pin assignments. For example Pinguino.cc uses pin 32 for the green LED but UECIDE does not recognize this. However, I was able to confirm that this function works with UECIDE but DOES NOT WORK WITH PINGUINO.CC

I assume, but could not verify this function works with Mpide because Mpide requires a different bootloader.

majenko

Mon, 07 Mar 2016 17:00:54 +0000

You cannot use the Pinguino Micro with MPIDE unless you either replace the bootloader or re-program MPIDE to use pic32prog in the right way and also compile with the special Pinguino Micro linker script.