Compatibility?

[chrisspen]

I bought this MPU9250 board, which I'm trying to calibrate and read data from. I've found some sample code that successfully reads raw values, but I can't find anything to calibrate it or access the DMP functionality.

From your README, you specifically target versions of this board implemented as Teensy add-on shields. Will your code work for this board? If so, which of your ino files are best suited to this board?

[kriswiner]

Any of my sketches will work with this board, but you will have to adapt them to your specific MCU and connections.

-----Original Message----- From: Chris Spencer [mailto:notifications@github.com] Sent: July 9, 2016 1:57 PM To: kriswiner/MPU-9250 Subject: [kriswiner/MPU-9250] Compatibility? (#66)

I bought this https://www.amazon.com/Diymall%C2%AE-Mpu-9250-Nine-axis-Attitude-Accelerati on/dp/B00OPNUO9U MPU9250 board, which I'm trying to calibrate and read data from. I've found some sample code that successfully reads raw values, but I can't find anything to calibrate it or access the DMP functionality.

From your README, you specifically target versions of this board implemented as Teensy add-on shields. Will your code work for this board? If so, which of your ino files are best suited to this board?

You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/kriswiner/MPU-9250/issues/66 , or mute the thread https://github.com/notifications/unsubscribe/AGY1qr4IA1R2sie5GZyTmp4lQvYlfK 7Tks5qUAs5gaJpZM4JIs3h . https://github.com/notifications/beacon/AGY1qrqyMB4yvb5nb11-PNAhLJ1KSjVjks5 qUAs5gaJpZM4JIs3h.gif

[chrisspen]

Your code doesn't compile. Do you have a installation guide or dependency list? It seems to rely on a library called "mbed". I'm assuming that corresponds to https://www.mbed.com, but after several minutes of searching, I can find no way to download any code. From the documentation, it brands itself an "OS", leading me to believe it's will add an enormous amount of complexity to my simple Arduino project.

[kriswiner]

Not sure why yu chose a sample designed to run on the STM32F4 but try this one instead; with small modification you should be able to get it to work.

https://github.com/kriswiner/MPU-9250/blob/master/MPU9250BasicAHRS.ino

-----Original Message----- From: Chris Spencer [mailto:notifications@github.com] Sent: July 9, 2016 7:28 PM To: kriswiner/MPU-9250 Cc: Kris Winer; Comment Subject: Re: [kriswiner/MPU-9250] Compatibility? (#66)

Your code doesn't compile. Do you have a installation guide or dependency list? It seems to rely on a library called "mbed". I'm assuming that corresponds to https://www.mbed.com, but after several minutes of searching, I can find no way to download any code. From the documentation, it brands itself an "OS", leading me to believe it's will add an enormous amount of complexity to my simple Arduino project.

You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/kriswiner/MPU-9250/issues/66#issuecomment-231567009 , or mute the thread https://github.com/notifications/unsubscribe/AGY1qrq-44myb2B88Kgw7vLUo5rrMI PZks5qUFirgaJpZM4JIs3h . https://github.com/notifications/beacon/AGY1qsUXmtuBnMq4awUx3nSX5u2dtPs9ks5 qUFirgaJpZM4JIs3h.gif

[chrisspen]

That is the one I tried. It complained of an undefined MadgwickQuaternionUpdate(), which I saw is defined several times in your code, so I first tried copying over the file quaternionFilters.ino, but that complained of more undefined variables. So I tried copying over MPU9250.h...but again it complained of the missing mbed.h. I eventually found that copying and pasting the code from quaternionFilters.ino into MPU9250BasicAHRS.ino allows it to compile cleanly.

It now runs, but the self-calibration doesn't work. I left the sensor lie completely flat while it calibrated, but the resulting yaw values are wrong. If I rotate the sensor 90 degrees, it only registers a change of 5 degrees.

How do you interpret the magnetometer values? When the compass is pointing exactly north, what should the values read?

[kriswiner]

This one has a proper calibration suite.

https://github.com/kriswiner/MPU-9250/blob/master/MPU9250_MS5637_AHRS_t3.ino

-----Original Message----- From: Chris Spencer [mailto:notifications@github.com] Sent: July 9, 2016 8:07 PM To: kriswiner/MPU-9250 Cc: Kris Winer; Comment Subject: Re: [kriswiner/MPU-9250] Compatibility? (#66)

That is the one I tried. It complained of an undefined MadgwickQuaternionUpdate(), which I saw is defined several times in your code, so I first tried copying over the file quaternionFilters.ino, but that complained of more undefined variables. So I tried copying over MPU9250.h...but again it complained of the missing mbed.h. I eventually found that copying and pasting the code from quaternionFilters.ino into MPU9250BasicAHRS.ino allows it to compile cleanly.

It now runs, but the self-calibration doesn't work. I left the sensor lie completely flat while it calibrated, but the resulting yaw values are wrong. If I rotate the sensor 90 degrees, it only registers a change of 5 degrees.

How do you interpret the magnetometer values? When the compass is pointing exactly north, what should the values read?

You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/kriswiner/MPU-9250/issues/66#issuecomment-231568098 , or mute the thread https://github.com/notifications/unsubscribe/AGY1qg-VJdEKxv7avTVX9yul4S3Dc4 iIks5qUGHFgaJpZM4JIs3h . https://github.com/notifications/beacon/AGY1qmzeyj0CLh4JdeYp22LM4JJnXvnEks5 qUGHFgaJpZM4JIs3h.gif

[chrisspen]

That one does run through a calibration procedure...but then gives me zeros for all readings except temperature...

[kriswiner]

You need to use the interrupt.

-----Original Message----- From: Chris Spencer [mailto:notifications@github.com] Sent: July 9, 2016 8:56 PM To: kriswiner/MPU-9250 Cc: Kris Winer; Comment Subject: Re: [kriswiner/MPU-9250] Compatibility? (#66)

That one does run through a calibration procedure...but then gives me zeros for all readings except temperature...

You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/kriswiner/MPU-9250/issues/66#issuecomment-231569300 , or mute the thread https://github.com/notifications/unsubscribe/AGY1quweZ7zgrZFRlfpsS9H58fXTc3 AOks5qUG01gaJpZM4JIs3h . https://github.com/notifications/beacon/AGY1qvNpAHPDnNOH44DpV6i1gE_sjusHks5 qUG01gaJpZM4JIs3h.gif