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eclipse / upm

UPM is a high level repository that provides software drivers for a wide variety of commonly used sensors and actuators. These software drivers interact with the underlying hardware platform through calls to MRAA APIs.
MIT License
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Something Wrong with MPU9150 moudle! #449

Closed windmillknight closed 8 years ago

windmillknight commented 8 years ago

Hello! I faced a trouble whith upm's Mpu9150 moudle.

My Mpu9150 is like this mpu MPU-9150 GY-9150

and I install upm moudle by "obkg install upm"
from "src mraa-upm http://iotdk.intel.com/repos/3.5/intelgalactic/opkg/i586"

Is that right?

sensor.init(); ^ Error: UPM Invalid Argument: Unknown error in I2c::readReg() at Error (native) at Object. (/home/root/intel-iot-services-orchestration-layer-master/node_modules/hope-demo/startkit/thing_bundle/new_things_by_user/MPU9150/输出/kernel.js:7:8) at Module._compile (module.js:409:26) at Object.Module._extensions..js (module.js:416:10) at Module.load (module.js:343:32) at Function.Module.load (module.js:300:12) at Function.Module.runMain (module.js:441:10) at startup (node.js:139:18) at node.js:968:3

Why this happen? please help me my edison version is v3.10 mraa version is v1.2.2

jontrulson commented 8 years ago

Hi,

Some of these sensors just do not play well with Edison I2C on an Arduino breakout. Check the system logs (journalctl) while trying to use the sensor and see if you are getting I2C read/write errors reported.

Unfortunately, if that is the case, we can't do anything about it.

windmillknight commented 8 years ago

Aug 12 03:41:54 Cheese libmraa[593]: [[1;39medison: Arduino board detected[[0m Aug 12 03:41:54 Cheese libmraa[593]: [[1;39mlibmraa initialised for platform 'I ntel Edison' of type 2[[0m Aug 12 03:41:54 Cheese libmraa[593]: [[1;39mi2c_init: Selected bus 0[[0m Aug 12 03:41:54 Cheese libmraa[593]: [[1;31mInvalid i2c bus 0, moving to defaul t i2c bus 6[[0m Aug 12 03:41:54 Cheese libmraa[593]: [[1;31mi2c6: read_byte_data: Access error: Remote I/O error[[0m

jontrulson commented 8 years ago

Yes, that's the error. One thing you might try is to use a voltage of 3.3v. That helps with some sensors that show this problem with Edison/Arduino. Also, if you have any other devices on the I2C bus, you might try to remove them and see if that helps.

Propanu commented 8 years ago

Hi @windmillknight. On the Edison with the Arduino breakout this sensor is only partially usable and it has to be alone on the I2C bus. You'll need to drop the board to 3V3 using jumper J9 and only the accelerometer, gyro & temperature will be available. In other words the built-in AK8975 compass doesn't get detected. You can either use the MPU60x0 class as is or the MPU9150 with the 4th constructor parameter enableAk8975 set to false.

Propanu commented 8 years ago

I'll close here, same topic in #456 which we can use to continue the discussion if needed.