External Crystal is not enabled in nRF51822- QFAB

[bhaskarch]

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

[Vidar Berg]

The nRF51 will use the internal clock as long as the crystal is not requested by the application or Softdevice. Also, the linker settings you posted will not work for the ble_app_beacon example because it will overlap with the softdevice. 

These should work for xxAB:

 

[bhaskarch]

thanks for reply

i  changed Rom and Ram setting Keil Tool, again it is not showing bluetooth on mobile.

first i need to enable Bluetooth on my nRF51822 AB board.

now i am loading ble_app_beacon code but external crystal is not enabled

which example code can i load into the board

Please suggest me.

[bhaskarch]

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]

hello Vidar Berg,

.hex file  should require for the Fresh custom nRF51822 board  for Enable the Bluetooth ?

[bhaskarch]

Hello Vidar Berg,

I loaded ble_app_beacon_w_softdevice.hex in nRF51822 QFAB custom board.

But Bluetooth is not Enabled(Not showing mobile & Laptop).

External Crystal also Not working.

Please advice. is it hardware issue. 

[Vidar Berg]

Hello,

Have you verified that your load capacitances corresponds with the load capacitance of your crystal ( for more details, see Crystal and load capacitors)? Not sure how you determine that the crystal is not working, but note that the softdevice keeps it off in idle mode so it won't be running all the time.

[bhaskarch]

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();
}

[Vidar Berg]

Are you able to debug the application to see if the program gets past this line:

while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0)
{
// Wait for started event to occur. Note: will spin forever if crystal isnt working
__NOP();}?

Also, did you verify the load capacitance?