MPUxxxx examples for SDK11

Made for:

• nRF51 DK (PCA10028)
• nRF52 DK (PCA10040)
• SDK 11.0.0
• SoftDevice S132 V2.0.0 and S130 V2.0.0.
• MPU9255
• MPU9150
• MPU6050 (not tested)

MPU library

Added support for both SPI and TWI hardware drivers. The drivers are located in nrf_drv_mpu_spi.c and nrf_drv_mpu_twi.c respectively. A library is running on top of the drivers. The library is located in app_mpu.h/c. By using the library the hardware driver is transparent to the application and it is easy to switch between SPI and TWI.

• Fixed bug with nrf52 easydma examples.
• Added examples with MPU data sent via UART over BLE

MPU library plus SPI and TWI drivers

Added support for both SPI and TWI hardware drivers. The drivers are located in nrf_drv_mpu_spi.c and nrf_drv_mpu_twi.c respectively. A library is running on top of the drivers. The library is located in app_mpu.h/c. By using the library the hardware driver is transparent to the application and it is easy to switch between SPI and TWI.