nRF52840, SDK17.1.0 SD140
I am attempting to write a 16 byte array to NVM. This array is initialized simply as uint8_t diaper_aes_enc_key[16];. For testing/learning of the fstorage library I attempt to write to fill this array with 7s, write this to flash, read it back into the array, and make sure nothing has changed.
//Setup flash storage
err_code = nrf_fstorage_init(
&my_instance, /* You fstorage instance, previously defined. */
&nrf_fstorage_sd, /* Name of the backend. */
NULL /* Optional parameter, backend-dependant. */
);
APP_ERROR_CHECK(err_code);
//THE FOLLOWING READ AND WRITE ARE FOR TESTING PURPOSES ONLY
for (int i = 0; i < 16; i++)
{
diaper_aes_enc_key[i] = 7;
}
err_code = nrf_fstorage_write(
&my_instance,
0x000FC000,
diaper_aes_enc_key,
sizeof(diaper_aes_enc_key),
NULL
);
while (nrf_fstorage_is_busy(&my_instance))
{
//spin
}
NRF_LOG_INFO("write result: %d", err_code);
err_code = nrf_fstorage_read(
&my_instance,
0x000FC000,
diaper_aes_enc_key,
sizeof(diaper_aes_enc_key)
);
while (nrf_fstorage_is_busy(&my_instance))
{
//spin
}
for (int i = 0; i < 16; i++)
{
NRF_LOG_INFO("Reading.. %X", diaper_aes_enc_key[i]);
}
My RTT output says the write went just fine with a err_code of 0, but when I read it back the array is four 0s followed by twelve 2s. I checked with the nRF connect for desktop programmer that this section of memory would be available. What am I doing wrong?
