Use DMP of MPU9250

[Sagisawa Yukichi]

my code is below. git_mpu9250_dmp.zip

Hello.

I use nRF52 & MPU9250. I want to use DMP, but I can't read data with DMP. Because it have failed that writting firmware.

I want to check connect sensor between nRF, I made a code for reading register of "WHO_AM_I". At first time, read "WHO_AM_I", return 0x71. After faild writting firmware, read "WHO_AM_I",return 0x0d.

I wrote firmware below, 16,0,0,70,0,0,0,0,24,0,0,0,2,0,3,0,0... read mem below, 0,83,5a,44,9,46,10,6,0,0,15,bb,48,79,c1,3c...

What was happened?

[MartinBL]

Thank you.

So you get -5 returned from mpu_write_mem(). That occurs when an error is propagated down the path from mpu_write_mem()->i2c_write()->call_mpu9250_write()->mpu9250_write(). In other words, 501 characters leftadd commentcancelsomething appears to go wrong in mpu9250_write(). You should try to debug your code to figure out exactly what goes on inside this function, which function returns the error, and what the error is.