NFC code not working

[Gordon]

Hi,

I'm trying to get NFC working on a PCA10040 dev board. Using the nfc/record_url hex file it works fine, so the hardware is obviously ok.

However, when I use the exact same code as in the record_url example from my software, it doesn't do anything. All functions execute without errors, but then log_uart_printf gets called with:

[NFC_HAL]: initialize
[NFC_HAL]: start
// ------------- put NFC device near 
[NFC_HAL]: fielddetected
[NFC_HAL]: reinitialize
[NFC_HAL]: fielddetected
[NFC_HAL]: fielddetected
[NFC_HAL]: reinitialize
[NFC_HAL]: fielddetected
[NFC_HAL]: reinitialize
[NFC_HAL]: fielddetected
[NFC_HAL]: reinitialize
[NFC_HAL]: fielddetected
[NFC_HAL]: fielddetected
[NFC_HAL]: fielddetected
[NFC_HAL]: fielddetected
[NFC_HAL]: reinitialize
[NFC_HAL]: fielddetected
[NFC_HAL]: reinitialize

Also, will the NFC code ever be distributed as something that's not a binary blob? I'm using a language interpreter (Espruino), and it expects functions to be compiled without hardware floating point (the call style is different). Currently the only way I can use NFC is to recompile with VFP, which means I'm then unable to pass floating point values into any functions!

[Hung Bui]

Hi Gordon,

Attached is an example to use record_url in other example (ble_app_hrm). I don't see any issue. Could you try ?

ble_app_hrs_URL_nfc - Copy.zip

[Hung Bui]

It's a good sign, we are coming closer, NRF_NFCT->TASKS_ACTIVATE = 1; is called when the HFCLK is started and NRF_DRV_CLOCK_EVT_HFCLK_STARTED event returned.

Could you check if could you check if nrf_drv_clock_hfclk_request() is called inside nrf_nfct_field_event_handler() ?

It could be an issue that HFCLK is not managed to start or it's already stated that the NRF_DRV_CLOCK_EVT_HFCLK_STARTED event never return.