the clock function is not working in esb_ptx example for nRF52832

[Masoumeh]

Hi, 

as I said before I am working with nRF52832. I can connect with nrf and program it. for example I can make an LED to blink. but when I run the esb_ptx example the program doesn't pass through the clock_initialize() line. I am using the CX2016DB32000D0WZRC1 chip as the crystal. can you help me to find the problem.   

[Einar Thorsrud]

Everything looks to be correctly oriented. But the soldering under the crystal looks a bit bad, particularly under the XC1 pad. Can you try solder another board and see if that works?

[Masoumeh]

I did it, but nothing changed. I have a question. I have a PCB antenna on my board which I copied it from some manual. the thing is that a part of this antenna is connected to the ground by a via, as you can see below. do you think that it can make any problem for the ground? I used two kind of antenna on my board to check their quality and this part of circuit is not connected to the RF line, but it is connected to ground by via. 

[Masoumeh]

Also I have another question. which example in the SDK can help me to put the nrf in test mode? 

[Einar Thorsrud]

Hi,

There are mainly two example in the SDK that are intended for testing:

• The Radio test example (for general radio testing)
• Direct Test Mode (used for Bluetooth certification)

Regarding the antenna and ground that could be relevant for radio/antenna performance, but should not affect the clock. And certainly not so  that the HFXO does not start (which seems to be the primary issue here).

[Masoumeh]

I really don't get that why the oscillator is not working. another question is that in the nrf XC1 pin, which is the input of the inverter, is there any ESD protection? as I tested I cannot find any in this pin, but in XC2 we have ESD protection.