Problem with my lis3lv02dq

Forum 2005-2010 (read only) Hardware Interfacing
1

Hello everybody,
I have a problem with my sensor lis3lv02dq.
I want to do a function that when you press a button, set to 0 the values of the 3-axis sensor to start from a point of reference.
I'm playing with several values in CTRL_REG2, but I can not reset using the boot.

I leave part of the code of my accelerometer

void Sensor_Init(void)
{
unsigned int xx = 0;
unsigned int yy = 0;
unsigned int zz = 0;
 xx= Sensor_RX(WHO_AM_I);
 yy= Sensor_RX(CTRL_REG1);
 zz= Sensor_RX(CTRL_REG3);
 printf(" W: %x 1: %x  2: %x \n", xx, yy, zz);


 // war: Sensor_TX(CTRL_REG1, 0x87); // Power on device, enable all axis, and turn off self test
 // war: Sensor_TX(CTRL_REG2, 0x45);

 //Axel: REG2: 0x65, REG1: 0x47
//Sensor_TX(CTRL_REG2, 0x14);
Sensor_TX(CTRL_REG2, 0x44);
Sensor_TX(CTRL_REG1, 0x87);

   if ((B1) == 0 && b1_flag == 0)          //if B1 pressed
     {
       draw_array32_to_lcd("Calibrate  ");
       
       b1_flag = 1;
     }
   if ((B1) != 0 && b1_flag != 0)          //if B1 released
     {
       Sensor_TX(CTRL_REG2, 0x14);
       b1_flag = 0;
     }

}
2

Do you have a website or URL that points to the datasheet of the sensor, that would be a great help.
Furthermore posting the whole code helps also, please use the # butto so the code appears between the [ code] and [/code] tags

3

but I can not reset using the boot

What does that mean?

As well as your code, it would be useful to see your debug print output.

4

The datasheet is this:
http://symbrion.org/tiki-download_file.php?fileId=225

Thks

5

You say you are trying to set the values to zero somehow - yet your code seems to simply reboot the chip.

So what exactly are you trying to do and what makes you think its not happening?

6

My idea is, when you press B1, display counters are in 0 to start measuring from a reference point.
It is a very simple idea, but I can not.
My problem is, when I press B1, don´t get to set 0