Multicore: Triggering functions to run on Core1 from Core0

[Jediknite1101]

So I finally got around the encoder X neoPixel library issue. Now I'm trying to figure out how trigger functions to run on the second core from inputs(push buttons & encoders) handle on core0.

#include <Joystick.h>
#include "PicoEncoder.h"
#include <NeoPixelConnect.h>

#define ENCODER_L_A 3
#define ENCODER_L_B 2 // For some reason my encoder OUTB needs to be pinned first read properly
#define ENCODER_R_A 5
#define ENCODER_R_B 4
#define ENC_STEP_MX 2400 // Incremental encoder's #PPR *4 This is maxium pulses your encoder to spin a full 360

int VolLCnt, VolRCnt = 0;
int oldLVolPos, oldRVolPos;
int VolLDir, VolRDir = 0;


PicoEncoder VolKnobL;

#define MAXIMUM_NUM_NEOPIXELS 28
#define BRIGHTNESS 20 // Precentage based
const int LEFTCOLOR[] = {15, 15, 180};
const int RIGHTCOLOR[] = {200, 16, 16};

NeoPixelConnect centerStrip(28, MAXIMUM_NUM_NEOPIXELS, pio0, 0);

void setup() {
  // Core 0 setup
  Joystick.begin();

  VolKnobL.begin(ENCODER_L_B);
  
} 

void setup1(){
  centerStrip.neoPixelClear();
}

void loop() {
// All user input function here on Core0

  VolKnobL.update();
  //VolKnobR.update();

  int newLVolPos = VolKnobL.step;
  //int newRVolPos = VolKnobR.step;

  // Read Left Volume Knob
  if (oldLVolPos != newLVolPos) {
    int LPosDiff = newLVolPos - oldLVolPos;

    if (newLVolPos > oldLVolPos){
      // <------- SpinRight() on Core1 ------->
    } else {
      // <------- SpinLeft() on Core1 -------->
    } 
 
    VolLCnt += LPosDiff;
  } 

  OldLVolPos = newLVolPos;

  if (VolLCnt < -ENC_STEP_MX/2 || VolLCnt > ENC_STEP_MX/2-1){
    VolLCnt = constrain (VolLCnt*-1, -ENC_STEP_MX/2, ENC_STEP_MX/2-1);
  }
}

void loop1() {
  //All NeoPixel functions managed on Core1
}

void SpinLeft(){
  Serial.println("Spinning Left");
  delay(1000);
}

void SpinRight(){
  Serial.println("Spinning Right");
  delay(1000);
}

[earlephilhower]

Try making your global state variables volatile and polling them in loop1 and do whatever is appropriate in loop1. Something like this:

...
volatile int volcnt;
...
void loop1() {
   int lastVolCnt;
    ....
   if (lastVolCnt != volCnt) {
        lastVolCnt = volCnt;
        ... change volume, make lights blink, etc ...
    }
    ....
}

[Jediknite1101]

The coding is DONE! OMG thank you for all your help.

[earlephilhower]

Great, good luck!