I use pin SDIN, SCLK, CS, DC.
but how do I connect the pin nrf51822
spi_master_example is
#define SPIM0_SCK_PIN 25u /**< SPI clock GPIO pin number. */
#define SPIM0_MOSI_PIN 20u /**< SPI Master Out Slave In GPIO pin number. */
#define SPIM0_MISO_PIN 22u /**< SPI Master In Slave Out GPIO pin number. */
#define SPIM0_SS_PIN 24u /**< SPI Slave Select GPIO pin number. */
#define SPIM1_SCK_PIN 29u /**< SPI clock GPIO pin number. */
#define SPIM1_MOSI_PIN 21u /**< SPI Master Out Slave In GPIO pin number. */
#define SPIM1_MISO_PIN 23u /**< SPI Master In Slave Out GPIO pin number. */
#define SPIM1_SS_PIN 28u /**< SPI Slave Select GPIO pin number. */
I don't know that connecting Method between OLED and nrf51822
EDIT: format
