NFC does not work

[ramtin-r]

Hi,

I'm using nRf52840 rev B and C chipset and not able to detect the NFC on the device (the rev A chipset is working). Following SW combination is used:

nRF5_SDK_15.0.0_a53641a

t2t_lib

s140_nrf52_6.0.0_softdevice

I've tested this both with our application and the sample example in examples/nfc/record_url. NFC can not be detected if Rev B or C of the chipset is used.

Thanks,

Ramtin

[ramtin-r]

I managed to get NFC working by editing the two functions which are used to decide the version of the HW.

NFC works if the code is changed:

type_52840_sample_check() always returns true and type_52840_final_check always returns false.

The question is what should the functions type_52840_final_check() and type_52840_sample_check() return for rev B and rev C samples.

[ramtin-r]

Seems that the workaround for FTPAN-190 uses TIMER4 which was not enabled in our code. After enabling it NFC worked fine for rev B and C.