How to use an I2C gyro LSM303 ?

Help & questions

geed

1 month ago

Hello !

I want to interface a small gyroscope in I2C. I use a LSM303 (from polulu) with the library. I connect 3.3.V, SDA SCL and GND.

But, my program block to the "SD Init OK" screen and does nothing.

My code is very simple.


I made something wrong ?

Thanks :)


#include <Gamebuino-Meta.h>
#include <LSM303.h>

LSM303 compass;
LSM303::vector<int16_t> running_min = {32767, 32767, 32767}, running_max = {-32768, -32768, -32768};

void setup() {
  // put your setup code here, to run once:
  gb.begin();
  compass.init();
  compass.enableDefault();
}

void loop() {
  // put your main code here, to run repeatedly:
  while(!gb.update());
  gb.display.clear();
  
  compass.read();
  
  running_min.x = min(running_min.x, compass.m.x);
  running_min.y = min(running_min.y, compass.m.y);
  running_min.z = min(running_min.z, compass.m.z);

  running_max.x = max(running_max.x, compass.m.x);
  running_max.y = max(running_max.y, compass.m.y);
  running_max.z = max(running_max.z, compass.m.z);
  
  gb.display.println(running_min.x);
  gb.display.println(running_min.y);
  gb.display.println(running_min.z);
  gb.display.println(running_max.x);
  gb.display.println(running_max.y);
  gb.display.println(running_max.z);
  
  
}

Sorunome

NEW 1 month ago

Maybe compass.init() causes your program to freeze up

Sutchig

NEW 1 month ago

I dont know if sda and scl pins are already pulled up with a pullup resistor. (4.7k Ohm each) if not, this could be the reason.

With my Classics i used an i2c scanner sketch to prove the connections to the slaves.

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