"Unique device ID"

[MuRa]

Hello all,

Two same same nRF52820 modules are connected to two usb ports and they are easily flashed via Segger, namely selected via two JLink emulator numbers.

Two separate which on is which , the printout of the DEVICE ID is added, however, the number is equal in both cases, although these are two physically different chips :)

  // finding the nRF52820 device- ID
  void my_device_ID(void) {
    m_device_id = NRF_FICR->DEVICEID[0]; /* Assign Device ID from FICR to m_device_id variable */
  }

  // print my Device ID
  printf("\n my_device_ID: %d\n", my_device_ID);
  my_device_ID();

Any idea how to get the "unique device ID" from the nrf52820 ?

Best.

[Sigurd Hellesvik]

Hi,

I agree that this is weird, and I will check up on this.

Have you by chance a third device to test this on, to see that the third one is different?

Regards,
Sigurd Hellesvik

[Dmitry]

Hi,

you're taking an address of my_device_ID function to print out. I think the code should look like this:

my_device_ID();
printf("\n my_device_ID: %d\n", m_device_id);

[MuRa]

Thank you both of you for comments.

You are right Dmitry, a typo...

RE Siguard Hellesvik , it may happen I will come back in few days with a new device too.

Best.

[MuRa]

Hello

I have found the problem, I guess 

The variable , namely m_device was static, removed now, any the "init" of the variable was added as well before the method is called, like m_device = 0;

It is funny how the last two numbers of the devices are the same:

#2112559513 

#2141709013  

Best.