Hi ,I am using nrf52 DK with mpu9255.I am using source code given here here.of this link,I have taken 'nrf5-ble-data-ready-interrupts' example .code builts fine in keil v5 though.I am not getting accel values.
I have pushed an updated 'nrf5-ble-data-ready-interrupts' example to github that I have tested with a PCA10056 and an MPU9255.
Note that to use pin 17, 19, 20, and 21 on the PCA10056 you will need to cut some solder bridges and do some soldering as these pins are not actually connected to the P24 header on the kit by default (as is described in the image you have posted): Solder bridge configuration.
Then why did you post an image of the pin documentation for the PCA10056? The PCA10040 version on github should work out of the box. Have you tried the example with the default pins? You can't use pin 21 on the kit. Refer to the silkscreen below the kit to see why.
