Hi all, Here is my first question on this forum after many hours working with the NRF but for the first time I didn't found the answer :)
My problem is : I would like to run the NFC in ISO/ICE 14443 Type A mode with t4t for reading and writing. For now, it works alone (with some strange behaviours). I'am able to exchange in both ways (read/write) few bytes and that's exactly what I want. The strange behaviour I mentionned above is that after few read/write sequences, it stops working and the callbak given in "nfc_t4t_setup" is no more called (only for NFC_T4T_EVENT_FIELD_OFF event). That is the first point, how could I get status of the nfc lib to monitor and, if needed, restart it?
The next step on which I'm struggling is that I want to use NFC with softdevice enabled and last but not least, in a low power application. Current ble example using NFC are not relevant because it's only for paring. So I initialized NFC as usual but since I go to sleep with "sd_app_evt_wait" it doesn't wake up when I try to use NFC but the power consumption rise up to 5mA instead of 3µA before approaching the smartphone. Is someone could help to, first find a way to use NFC properly with softdevice, and second how to wakeup properly on an event like NFC field or something ?
Last question : NFC callback seems to be timming sensitive (if I print debug in it) It doesn't work properly. Any advice ?
Thanks in advance for your help.
Here the code (all functions begining with Sys are calling our custom code):
int main(void) {
uint32_t err_code;
IS_DBG_Init();
// Set up NFC
err_code = nfc_t4t_setup(nfc_callback, NULL);
// Start sensing NFC field
err_code = nfc_t4t_emulation_start();
Sys_Init();
app_timer_init();
ble_stack_init(app_ble_callback);
gap_params_init(DEVICE_NAME,BLE_APPEARANCE_UNKNOWN,TX_POWER_LEVEL,STATIC_PASSKEY);
//gatt_init();
//services_init(&_app);
advertising_init(APP_ADV_INTERVAL, APP_ADV_TIMEOUT_IN_SECONDS);
//conn_params_init(); //need app_timer_init
peer_manager_init();
advertising_start(true);
//start_scan();
while (1)
{
if (Sys_Process())
{
Sys_Sleep();
sd_app_evt_wait();
Sys_Wakeup();
}
}
}
