Unable to change SPI instance in spi example.

[RJD]

Hello, I am trying to change the instance on the spi in the spi example, but unfortunately it is throwing me an error -  implicit declaration of function 'NRF_DRV_SPI_INSTANCE_'; did you mean 'NRF_DRV_SPI_INSTANCE'? [-Werror=implicit-function-declaration]

The code is the spi example provided with the sdk.

[haakonsh]

You need to enable the instance in sdk_config.h.

[RJD]

which sdk_confuig.h

[haakonsh]

The one that is used to configure your project. f.ex. nRF5_sdk_x.x/examples/peripheral/rtc/pca10040/config/sdk_config.h is the configuration file for the RTC example.