External Crystal is not enabled in nRF51822- QFAB

Question

I am starter developer of nRF51822 custom board. 
 in this board 16 mhz crystal is connected externally with XC1 and XC2 pins(37 & 38) 
 nRF5_SDK_12.1.0_0d23e2a rar file is downloaded, IDE : Keil Uvision5 , Softdevice : 130 
 Computer Platform : Windows 7 
 Hardware : nRF51822-QFAB 
 Examples code i.e ble_app_beacon --> pca10028--> s130--> arm5_no_packs code is compiled with no errors and warnings. 
 Downloaded the code in nRF51822 custom board with ST-link programmer through Keil software. 
 Bluetooth is enabled and Crystal also not enabled. 
 i loaded GPIO led program only. it is working. Delay_ms is working but External crystal is not working. 
 Please advice working example code for my nRF51822 controller

bhaskarch · Answer

ok. Thak you. 
 Send me example programs for nRF51822-QFAB custom board. 
 I am using external crystal 16 Mhz. crystal is not enable with Beacon code i.e PCA10028(S130)

bhaskarch · Answer

Hello, 
 I added bellow instruction in main. 
 External crystal is working i.e 16 Mhz. 
 But I loaded Beacon program and ble_app_beacon_w_softdevice.hex . 
 Then Crystal and Bluetooth is not working. 
 NRF_CLOCK->EVENTS_HFCLKSTARTED = 0; NRF_CLOCK->TASKS_HFCLKSTART = 1; //NRF_CLOCK->XTALFREQ = CLOCK_XTALFREQ_XTALFREQ_16MHz; while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0) { // Wait for started event to occur. Note: will spin forever if crystal isnt working __NOP(); }

External Crystal is not enabled in nRF51822- QFAB

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