[SOLVED] Controlling the 9-axis motion sensor from the M4-core

I would like to use more features of the motion sensor, and I'm trying to control the motion sensor from the M4 core. I'm following steps in "How to control the 9-axis motion sensors from the M4 Core".

As far as I can tell I have assigned the motion sensor to the M4 in the device tree editor:


I have downloaded the (or should I say 'a'?) FXOS8700CQ library from GitHub.

Trying out the code that is on the page I notice that the program hangs as soon as "accMagSensor.readMagData();" gets called.

This is the full source code of my experiment:

Code:

#include <Wire.h>

#include <FXOS8700CQ.h>

FXOS8700CQ accMagSensor = FXOS8700CQ(0x1E);
void setup() {
  pinMode(13, OUTPUT);
  Serial.begin(115200);

  Wire1.begin();
  accMagSensor.init();

}

void loop() {
  Serial.println("Flash5");
  digitalWrite(13, HIGH);
  accMagSensor.readMagData();
Serial.print("Accel ");
Serial.print("  ");
Serial.print((int)accMagSensor.accelData.x);
Serial.print("  ");
Serial.print((int)accMagSensor.accelData.y);
Serial.print("  ");
Serial.println((int)accMagSensor.accelData.z);

  delay(25);
  digitalWrite(13, LOW);
  delay(3000 -25);
}

(btw the motion sensor still show up on the Neo's webpage, I would expect them not to after the device tree has been edited).

-- update -- apperently they weren't assigned to M4, but after correcting that it still seems to hang at the call ---

 

--- update 2: to make sure it isn't a wrong library I retried it from the internal Arduino IDE - same result --

 

You have to use accMagSensor.readAccelData(); accMagSensor.readMagData();

 

Same result - hangs when reading sensor.
Doesn't matter whether I do

Code:

accMagSensor.readAccelData();
accMagSensor.readMagData();

or

Code:

accMagSensor.readAccelData();

#sadpanda

 

Anybody else willing to try? I now read the values in Linux, but I think it is more efficient in Arduino, and I'd like to use the interrupt capabilities of the sensor.

 

Sorry, I don't have a Neo full.

 

It doesn't work for me too. UDOO FULL

 

Thanks for trying. I'll reach out to UDOO Support.

 

I've installed the libraries from the aforementioned git repo, and the result is the same, that is: 'hangs'. Given that they should be the same as the ones on rc2 this comes as no surprise, I already tried those directly available on the board.

 

Pin configuration according to device tree editor:


Code I'm using as Gist: https://gist.github.com/cuhka/465169d905bffc9dceb9cca02d9dfb16

SOLVED: Missing Wire1.begin() in setup()