RE: Issue Erasing Flash Area on QSPI Flash with LittleFS in Zephyr

Priyanka — Thu, 22 Aug 2024 10:38:08 GMT

Hi,

Please also note that flash devices like p25q16h etc have certain specific erase sizes like 4KB, 32KB or so. You need to make sure that pfa->fa_off (the start address) and pfa->fa_size (the size to erase) are aligned to this block size.

-Priyanka

RE: Issue Erasing Flash Area on QSPI Flash with LittleFS in Zephyr

sina008 — Wed, 21 Aug 2024 18:54:41 GMT

Hi Turbo J Thank you for your help. I fixed the size issue but I am still getting the same error.

[00:00:00.296,386] <inf> littlefs: littlefs partition at /lfs1
[00:00:00.296,417] <inf> littlefs: LittleFS version 2.5, disk version 2.0
[00:00:00.296,508] <inf> littlefs: FS at p25q16h@0:0x0 is 512 0x1000-byte blocks with 512 cycle
[00:00:00.296,508] <inf> littlefs: sizes: rd 16 ; pr 16 ; ca 64 ; la 32
[00:00:00.296,997] <inf> littlefs: Automount /lfs1 succeeded
*** Booting nRF Connect SDK v3.5.99-ncs1-1 ***
[00:00:00.297,058] <inf> main: Sample program to r/w files on littlefs

Area 0 at 0x0 on p25q16h@0 for 2097152 bytes
[00:00:00.297,119] <err> qspi_nor: erase error: address or size exceeds expected values.Addr: 0x0 size 2097152
[00:00:00.297,119] <err> main: Erasing flash area ... -22

This is how I mount the partition:

#define PARTITION_NODE DT_NODELABEL(lfs1)

#if DT_NODE_EXISTS(PARTITION_NODE)
FS_FSTAB_DECLARE_ENTRY(PARTITION_NODE);
#else /* PARTITION_NODE */
FS_LITTLEFS_DECLARE_DEFAULT_CONFIG(storage);
static struct fs_mount_t lfs_storage_mnt = {
	.type = FS_LITTLEFS,
	.fs_data = &storage,
	// .storage_dev = (void *)FIXED_PARTITION_ID(lfs1_part),
    .storage_dev= (void*)FLASH_AREA_ID(littlefs_storage);
	.mnt_point = "/lfs1",
};
#endif /* PARTITION_NODE */

	struct fs_mount_t *mountpoint =
#if DT_NODE_EXISTS(PARTITION_NODE)
		&FS_FSTAB_ENTRY(PARTITION_NODE)
#else
		&lfs_storage_mnt
#endif
		;

static int littlefs_mount(struct fs_mount_t *mp)
{
	int rc;

	rc = littlefs_flash_erase((uintptr_t)mp->storage_dev);
	if (rc < 0) {
		return rc;
	}

	/* Do not mount if auto-mount has been enabled */
#if !DT_NODE_EXISTS(PARTITION_NODE) ||						\
	!(FSTAB_ENTRY_DT_MOUNT_FLAGS(PARTITION_NODE) & FS_MOUNT_FLAG_AUTOMOUNT)
	rc = fs_mount(mp);
	if (rc < 0) {
		LOG_PRINTK("FAIL: mount id %" PRIuPTR " at %s: %d\n",
		       (uintptr_t)mp->storage_dev, mp->mnt_point, rc);
		return rc;
	}
	LOG_PRINTK("%s mount: %d\n", mp->mnt_point, rc);
#else
	LOG_PRINTK("%s automounted\n", mp->mnt_point);
#endif

	return 0;
}

I modified the dts overlay as well since the partition label was the same as the board file definition:

/{
    chosen{
        nordic,pm-ext-flash=&p25q16h;
    };
};
/ {
    fstab {
        compatible = "zephyr,fstab";
        lfs1: lfs1 {
            compatible = "zephyr,fstab,littlefs";
            mount-point = "/lfs1";
            partition = <&lfs1_part>;
            automount;
            read-size = <16>;
            prog-size = <16>;
            cache-size = <64>;
            lookahead-size = <32>;
            block-cycles = <512>;
        };
    };
};

&qspi {
    p25q16h: p25q16h@0 {
    partitions {
        compatible = "fixed-partitions";
        #address-cells = <1>;
        #size-cells = <1>;

        lfs1_part: partition@0 {
            label = "littlefs_storage";
            reg = <0x00000000 0x00200000>;  // 2 MiB partition for LittleFS
        };
    };

        size = <0x00200000>;
  };
};

These are the partitions from the board file:

&qspi {
	status = "okay";
	pinctrl-0 = <&qspi_default>;
	pinctrl-1 = <&qspi_sleep>;
	pinctrl-names = "default", "sleep";
	p25q16h: p25q16h@0 {
		compatible = "nordic,qspi-nor";
		reg = <0>;
		sck-frequency = <104000000>;
		quad-enable-requirements = "S2B1v1";
		jedec-id = [85 60 15];
		sfdp-bfp = [
			e5 20 f1 ff  ff ff ff 00  44 eb 08 6b  08 3b 80 bb
			ee ff ff ff  ff ff 00 ff  ff ff 00 ff  0c 20 0f 52
			10 d8 08 81
		];
		size = <16777216>;
		has-dpd;
		t-enter-dpd = <3000>;
		t-exit-dpd = <8000>;
	};
};
&flash0 {
	partitions {
		compatible = "fixed-partitions";
		#address-cells = <1>;
		#size-cells = <1>;

		sd_partition: partition@0 {
			label = "softdevice";
			reg = <0x00000000 0x00027000>;
		};

		code_partition: partition@27000 {
			label = "code_partition";
			reg = <0x00027000 0x000c5000>;
		};

		/*
		 * The flash starting at 0x000ec000 and ending at
		 * 0x000f3fff is reserved for use by the application.
		 *
		 * Storage partition will be used by FCB/LittleFS/NVS
		 * if enabled.
		 */
		storage_partition: partition@ec000 {
			label = "storage";
			reg = <0x000ec000 0x00008000>;
		};

		boot_partition: partition@f4000 {
			label = "adafruit_boot";
			reg = <0x000f4000 0x0000c000>;
		};
	};
};

RE: Issue Erasing Flash Area on QSPI Flash with LittleFS in Zephyr

Turbo J — Wed, 21 Aug 2024 17:33:36 GMT

That flash chip has 16 MBits or 2MBytes storage space. You are trying to erase 16MByte - obviously not possible.