nRF52 SoC flash usage in smp_svr example

[Zheckiss]

smp_svr example mounts littleFS file system in SoC flash for OTA DFU function. Can I use that file system to save my variables? When I use fs_open() function there is an error: fs: invalid file name!! Sorry, I don't know, how to make readable code here...
`#define STORAGE_PARTITION_LABEL storage_partition
#define STORAGE_PARTITION_ID FIXED_PARTITION_ID(STORAGE_PARTITION_LABEL)

/* Define an example stats group; approximates seconds since boot. */
STATS_SECT_START(smp_svr_stats)
STATS_SECT_ENTRY(ticks)
STATS_SECT_END;

/* Assign a name to the ticks stat. */
STATS_NAME_START(smp_svr_stats)
STATS_NAME(smp_svr_stats, ticks)
STATS_NAME_END(smp_svr_stats);

/* Define an instance of the stats group. */
STATS_SECT_DECL(smp_svr_stats) smp_svr_stats;

#ifdef CONFIG_MCUMGR_GRP_FS
FS_LITTLEFS_DECLARE_DEFAULT_CONFIG(cstorage);
static struct fs_mount_t littlefs_mnt = {
.type = FS_LITTLEFS,
.fs_data = &cstorage,
.storage_dev = (void *)STORAGE_PARTITION_ID,
.mnt_point = "/lfs1"
};
#endif

int main(void)
{

struct fs_file_t file;
struct fs_dir_t dir;
struct fs_statvfs sbuf;
char f_Name[] = "/vars.dat";
uint8_t test_Bytes[] = {0x01,0x02,0x03,0x04};


NRF_POWER->DCDCEN = false;
NRF_UICR->NFCPINS = 0;  // NFC pins as GPIOs

LOG_LEVEL_SET(LOG_LEVEL_INF);
int rc = STATS_INIT_AND_REG(smp_svr_stats, STATS_SIZE_32,
			    "smp_svr_stats");

if (rc < 0) {
	LOG_ERR("Error initializing stats system [%d]", rc);
}

/* Register the built-in mcumgr command handlers. */

rc = fs_mount(&littlefs_mnt);
if (rc < 0) {
	LOG_ERR("Error mounting littlefs [%d]", rc);
} else {
	LOG_INF("result [%d]", rc);
}
k_sleep(K_MSEC(50));

//fs_dir_t_init(&dir);
fs_file_t_init(&file);
rc = fs_statvfs(&littlefs_mnt.mnt_point, &sbuf);
if (rc < 0) {
printk("FAIL: statvfs: %d\n", rc);
return;
}

printk("%s: bsize = %lu ; frsize = %lu ;"
       " blocks = %lu ; bfree = %lu\n",
       littlefs_mnt.mnt_point,
       sbuf.f_bsize, sbuf.f_frsize,
       sbuf.f_blocks, sbuf.f_bfree);

rc = fs_open(&file, f_Name, FS_O_CREATE|FS_O_RDWR);
if (rc < 0) {
LOG_ERR("Error of opening file [%d]", rc);
} else {
LOG_INF("File opened ok!");
}
rc = fs_seek(&file, 0, FS_SEEK_SET);
if (rc < 0) {
LOG_ERR("FAIL: seek %s: %d", f_Name, rc);
}
ssize_t rf = fs_write(&file, test_Bytes, 4);
if (rf < 0) {
LOG_ERR("Error of writing file [%d]", rf);
} else {
LOG_INF("File written ok! [%d]", rf);
}
rc = fs_close(&file);
if (rc < 0) {
LOG_ERR("Error of closing file [%d]", rc);
}

#ifdef CONFIG_MCUMGR_TRANSPORT_BT
start_smp_bluetooth_adverts();
#endif

while (1) {
	k_sleep(K_MSEC(1000));
	STATS_INC(smp_svr_stats, ticks);
}
return 0;

}
`

[thedjnK]

You need to reformat the code between a ``` at the top and ``` at the bottom. Also, don't do things like touch the UICR, this is not correct, there are Kconfig options to set these values