nrf52840 + littlefs(external flash) +mcuboot can't set mounted area(qspi + mx25r64 is ok)

Question

Hello

Happy Christmas in advance.

I meet a trouble about using littlefs and mcuboot at nrf52840dk.

ncs1.7.1

project:littlefs

I have changed the nrf52840dk_nrf52840.overlay file

/*
 * Copyright (c) 2019 Peter Bigot Consulting, LLC
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/delete-node/ &storage_partition;

/ {
	chosen {
		nordic,pm-ext-flash = &FM25Q08B;
	};
};

/ {
	fstab {
		compatible = "zephyr,fstab";
		lfss1: lfs1 {
			compatible = "zephyr,fstab,littlefs";
			mount-point = "/lfs1";
			partition = <&lfs1_part>;
			read-size = <16>;
			prog-size = <16>;
			cache-size = <64>;
			lookahead-size = <32>;
			block-cycles = <512>;
		};
	};
};

&spi3 {
	compatible = "nordic,nrf-spim";
	status = "okay";
	sck-pin = <28>;
	mosi-pin = <26>;
	miso-pin = <24>;
	cs-gpios = <&gpio0 30 GPIO_ACTIVE_LOW>;

	FM25Q08B:FM25Q08B@0 {
		compatible = "jedec,spi-nor";
		reg = <0>;
		spi-max-frequency = <0x400000>;
        label = "FM25Q08B";
        jedec-id = [ C2 20 18 ];
        size = < 0x8000000 >;
		partitions {
			compatible = "fixed-partitions";
			#address-cells = <1>;
			#size-cells = <1>;
	
			lfs1_part: partition@0 {
				label = "storage";
				reg = <0x00000000 0x00200000>;
			};
		};		
	};
};

&i2c0 {
	status = "disabled";
};
&i2c1 {
	status = "disabled";
};
&spi1 {
	status = "disabled";
};
&spi2 {
	status = "disabled";
};
&spi0 {
	status = "disabled";
};
&qspi {
	status = "disabled";
};
&uart0 {
	status = "disabled";
};
&uart1 {
	status = "disabled";
};
&usbd {
	status = "disabled";
};
&led0 {
	status = "disabled";
};
&led1 {
	status = "disabled";
};
&led2 {
	status = "disabled";
};
&led3 {
	status = "disabled";
};
&pwm_led0 {
	status = "disabled";
};
&button0 {
	status = "disabled";
};
&button1 {
	status = "disabled";
};
&button2 {
	status = "disabled";
};
&button3 {
	status = "disabled";
};
&arduino_header {
	status = "disabled";
};

nrf52840dk_nrf52840.conf

#
# Copyright (c) 2019 Peter Bigot Consulting, LLC
# Copyright (c) 2019 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: Apache-2.0
#

# Need this when storage is on flash
CONFIG_MPU_ALLOW_FLASH_WRITE=y

# Need this when storage is on MX25R64
# CONFIG_NORDIC_QSPI_NOR=y
# CONFIG_NORDIC_QSPI_NOR_FLASH_LAYOUT_PAGE_SIZE=4096
CONFIG_SPI=y
CONFIG_SPI_NOR=y

add pm_static.yml

external_flash:
  address: 0x0
  end_address: 0x1000000
  region: external_flash
  size: 0x1000000
littlefs_storage:
  address: 0x0
  device: FM25Q08B
  region: external_flash
  size: 0x20000

But I got wrong address I wanted.

Can you give me some advice? thank you.

littlefs.zip

Август · Accepted Answer

Hi 
 I have found the reason. 
 When I use external flash the flash area open id always 0, but I am using pm_static.yml external_flash is the id is 0 littlefs_storage id is 1, so #define PARTITION_NODE DT_NODELABEL (lfs1) may have some problems we can use another way and chose right lable. 
 
 lable: storage 
 FS_LITTLEFS_DECLARE_DEFAULT_CONFIG(storage);
static struct fs_mount_t lfs_storage_mnt = {
	.type = FS_LITTLEFS,
	.fs_data = &storage,
	.storage_dev = (void *)FLASH_AREA_ID(storage),
	.mnt_point = "/lfs",
};

nrf52840 + littlefs(external flash) +mcuboot can't set mounted area(qspi + mx25r64 is ok)

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