Hello,
I'm using the nfr52840 with SD140 and the SDK 17.0.2
I'm facing an issue where calling nfc_t2t_setup is failing when it called a second time.
I'm wonder the following should work but it doesn't:
nfc_init();
nfc_register_tag("foo");
nfc_deinit();
// renable nfc will fail here
nfc_init();
With the following definitions:
uint32_t nfc_init() {
/*.....*/
ret_code_t ret = nfc_t2t_setup(nfc_callback, NULL);
/*.....*/
return ret;
}
uint32_t nfc_deinit() {
ret_code_t ret = nfc_t2t_emulation_stop();
if (ret != NRF_SUCCESS) {
LOG_ERR("nfc t2t emulation cannot be stopped properly '%s'", nrf_strerror_get(ret));
return nrf_to_s7l_err(ret);
}
ret = nfc_t2t_done();
if (ret != NRF_SUCCESS) {
LOG_ERR("nfc_t2t_done has failed! '%s'", nrf_strerror_get(ret));
}
return ret;
}
uint32_t nfc_register_tag(const char *tag) {
/*encoding message is skipped here...*/
return nfc_t2t_emulation_start();
}
After digging the issue I've found the nfc_t2t_setup return NRFX_ERROR_INVALID_STATE and the error code is coming from the following call stack:
As we can see, m_nfct_cb.state has not been cleared and nrfx_nfct_init just fail...
I can quick fix this by calling nrfx_nfct_uninit() right after nfc_t2t_done().
I think it should be handled properly in the nfc_t2t_lib instead. Or maybe I've missed something.
Let me know.
Best,
Joël
