hello , Nordic Engineers. my IDE is keil and the sdk is nRF51_SDK_10 and s110_nrf51_8.0.0_softdevice.hex. The project is "C:\Users\robben\Desktop\nRF51_SDK_10\nRF51_SDK_10\examples\ble_peripheral\ble_app_uart\pca10028\s110\arm5_no_packs" I use externl 32M crystal first ,the crystal can work but i can not finde the bluetooh device. then i add the code "NRF_CLOCK->XTALFREQ = 0xFFFFFF00" to file main.c in line 518,but the crystal can not work. now i don`t know how to use the externl 32M crystal.
