Hi Nordic,
Where is a bug in bsp.h nRF51 SDK 9.0.0 and I think it was were before as well: LEDS_NUMBER equal 0 causing a compilation error.
In Line 59:
#if (LEDS_NUMBER > 0) && !defined(BSP_SIMPLE)
#define BSP_LED_APP_TIMERS_NUMBER 2
#else
#define BSP_APP_APP_TIMERS_NUMBER 0
#endif // LEDS_NUMBER > 0
For LEDS_NUMBER equal 0 BSP_LED_APP_TIMERS_NUMBER 0 should be defined instead.
Regards, Dmitri.