The SDK v16 package has a board file for the nRF52833 board, PCA10100, however this seems to reference GPIO pins which are not present on the device:
#define SER_APP_SPIM0_SCK_PIN NRF_GPIO_PIN_MAP(0,27) // SPI clock GPIO pin number. #define SER_APP_SPIM0_MOSI_PIN NRF_GPIO_PIN_MAP(0,2) // SPI Master Out Slave In GPIO pin number #define SER_APP_SPIM0_MISO_PIN NRF_GPIO_PIN_MAP(0,26) // SPI Master In Slave Out GPIO pin number #define SER_APP_SPIM0_SS_PIN NRF_GPIO_PIN_MAP(1,13) // SPI Slave Select GPIO pin number <-- No such GPIO #define SER_APP_SPIM0_RDY_PIN NRF_GPIO_PIN_MAP(1,15) // SPI READY GPIO pin number <-- No such GPIO #define SER_APP_SPIM0_REQ_PIN NRF_GPIO_PIN_MAP(1,14) // SPI REQUEST GPIO pin number <-- No such GPIO #define ARDUINO_13_PIN NRF_GPIO_PIN_MAP(1, 23) // Digital pin 13 <-- No such GPIO #define ARDUINO_12_PIN NRF_GPIO_PIN_MAP(1, 22) // Digital pin 12 <-- No such GPIO #define ARDUINO_11_PIN NRF_GPIO_PIN_MAP(1, 21) // Digital pin 11 <-- No such GPIO #define ARDUINO_10_PIN NRF_GPIO_PIN_MAP(1, 20) // Digital pin 10 <-- No such GPIO #define ARDUINO_9_PIN NRF_GPIO_PIN_MAP(1, 19) // Digital pin 9 <-- No such GPIO #define ARDUINO_8_PIN NRF_GPIO_PIN_MAP(1, 17) // Digital pin 8 <-- No such GPIO
What should these values be?