LSM330DL - DataRready Interrupt

pz · ‎2013-11-20

Posted on November 20, 2013 at 10:38

Hi community,

i am working on an application with the accelerometer and gyroscope in LSM330DL.

At the moment I try to use the DataReady-Interrupt for the gyroscope.

My understanding of DRDY-Interrupt is that whenever new data is stored in the register, the sensor pull down the DRDY-Pipe.

I have tryed several configurations, hardware adjustments and so on but nothing works properly.

The DRDY-Pipe is always in high-state.

At the moment i have a very basic test program, where i initialize the sensor and wait for an interrupt.

In the following my configuration of the gyroscope:

REG1: 400Hz - 50Hz cutoff, normal mode, xyz - enable

REG2: everything 0

REG3: I2_DRDY enable

REG4: continuous update, LSB, 2000dps, 4-wire

REG5: FIFO disabled, HPF disabled

I asked the same question more than one week ago to the st-support, but no one answered me.

I hope you can help me!

Best Regards,

Patrick

#lsm330dlc-drdy-interrupt #lsm330dl #gyroscopes #drdy-int.

Thiago REIS · ‎2013-11-22

Posted on November 22, 2013 at 14:20

Hello Patrick,

In order to better answer your question, could you please provide the full configuration set of the registers that you are using?

If possible as well, could you please attach the schematic of your module setup?

Thank you,

Thiago Reis

pz · ‎2013-11-25

Posted on November 25, 2013 at 10:34

The schematic is attached.

My configuration:

CTRL_REG1_G: 1010 1111 | 400Hz, 50Hz cutoff. normal mode, axis enabled

CTRL_REG2_G: 0000 0000

CTRL_REG3_G: 0000 1000 | DRDY enable

CTRL_REG4_G: 0011 0000 | 2000dps

CTRL_REG5_G: 0000 0000

REFERENCE/DATACAPTURE_G: 0000 0000

FIFO_CTR_REG_G: 0000 0000

INT1_CFG_G: 0000 0000

I hope that's what you asked for.

Thank you,

Patrick

________________

Attachments :

RotationLED.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HtzP&d=%2Fa%2F0X0000000ab1%2Fi6Zgxx5tDh6NsOGTaG1iyHAcY8U83RhYOD1JU5D73FQ&asPdf=false

pz · ‎2013-12-06

Posted on December 06, 2013 at 16:14

Hello?

Can you help me pls?

andiob · ‎2013-12-10

Posted on December 10, 2013 at 15:10

I have the same problem with another sensor ( L3GD20). The data ready is configured but the line allways stay high unless i manually read a full set of values ( in my case from register 0x28 to register 0x2D). Another strange thing ( at least strange to me ) is that when the interrupt trigger after reading it get cleared every time after a different number of ms ( from 4 to 12 ). I expected to get a drdy interrupt ever 1/95 sec considering my gyro is now set to output at 95 hz.

pz · ‎2013-12-16

Posted on December 16, 2013 at 10:45

Hi sires,

i have exactly the same behavior as you descriped with my sensor.

If you are able to fix this strange thing, can you please post this here?

I will keep this post up-to-date.

markus239955_stm1 · ‎2014-11-03

Posted on November 03, 2014 at 10:07

Hi

is there any solution available for this problem. I have same behaviour with the LSM330DLC Accelerometer/Gyroscope.

Regards

Markus