nRF9151 Feather v1 - External Flash erase/format

cptel

Is there a way to format the external Flash on nRF9151 Feather?

I have used fs_unlink() to remove individual files & directories. Looking for a better way to format the entire Flash - assuming one exists.

jaredwolff

@cptel yes. If you look at the external flash sample, it should help. I’m not near a computer but I’ll share the code when I am.

cptel

I believe this is what you are referring to. Setting “CONFIG_APP_WIPE_STORAGE=y” in prj.cnf gives me compile error.
`static int littlefs_flash_erase(unsigned int id)
{
const struct flash_area *pfa;
int rc;

rc = flash_area_open(id, &pfa);
if (rc < 0)
{
	LOG_ERR("FAIL: unable to find flash area %u: %d\n",
			id, rc);
	return rc;
}

LOG_PRINTK("Area %u at 0x%x on %s for %u bytes\n",
		   id, (unsigned int)pfa->fa_off, pfa->fa_dev->name,
		   (unsigned int)pfa->fa_size);

/* Optional wipe flash contents */
if (IS_ENABLED(CONFIG_APP_WIPE_STORAGE))
{
	rc = **flash_area_erase**(pfa, 0, pfa->fa_size);
	LOG_ERR("Erasing flash area ... %d", rc);
}

flash_area_close(pfa);
return rc;

I tried that and receiving the following error
[00:00:39.221,893] <err> PWL: Erasing flash area ... 0 [00:00:39.228,332] <err> littlefs: WEST_TOPDIR/modules/fs/littlefs/lfs.c:1374: Corrupted dir pair at {0x0, 0x1} [00:00:39.239,135] <err> fs: failed get file or dir stat (-14) [00:00:39.245,666] <err> PWL: statvfs: -14 [00:00:39.250,488] <inf> PWL: bsize = 16 ; frsize = 4096 ; blocks = 4096 ; bfree = 0

cptel

somehow that worked! All set - thanks!

[[00:00:02.518,615] <inf> PWL: bsize = 16 ; frsize = 4096 ; blocks = 4096 ; bfree = 4094