kriswiner
commented
6 years ago There is no firmware on the MPU9250, at least not sufficient firmware. You have to download a ~5 kByte binary blob into the chip using the MCU. Ask Invensense where to get this.
BTW, the DMP is opaque, you will undertsand nothing by using it. Also, it runs at a fixed 100 Hz and doesn't use the mag data, so Yaw will be subject to rather wicked drift. See here:
https://github.com/kriswiner/MPU6050/wiki/Affordable-9-DoF-Sensor-Fusion
Looks like ~0.4 degree per minute.
On Wed, Apr 18, 2018 at 1:46 AM, PauwelsKristof notifications@github.com wrote:
Hi,
I am working on a project to calculate the yaw, pitch and roll angles via a MPU9250. For that i want to use the DMP for the Low Power Quaternion. But i want to use as little libraries as possible to get a good understanding of what is really going on.
In the 'Programming Sequence for DMP Hardware Functions' application note i've found how to enable the advanced hardware features at page 35 but at the end i need to load the firmware into the DMP. Do you know where i can find the firmware or is there a default firmware present on the chip?
Best regards
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PauwelsKristof
Hi,
I am working on a project to calculate the yaw, pitch and roll angles via a MPU9250. For that i want to use the DMP for the Low Power Quaternion. But i want to use as little libraries as possible to get a good understanding of what is really going on.
In the 'Programming Sequence for DMP Hardware Functions' application note i've found how to enable the advanced hardware features at page 35 but at the end i need to load the firmware into the DMP. Do you know where i can find the firmware or is there a default firmware present on the chip?
Best regards