We have a product which is based on nrf52840 and nrf connect sdk 2.8.0
After OTA sometimes, I find that the NVS is erased, which could lead to some issues on client side.
Here is the content of pm_static file
app:
address: 0xc200
end_address: 0x85000
region: flash_primary
size: 0x78e00
mcuboot:
address: 0x0
end_address: 0xc000
placement:
before:
- mcuboot_primary
region: flash_primary
size: 0xc000
mcuboot_pad:
address: 0xc000
end_address: 0xc200
placement:
align:
start: 0x1000
before:
- mcuboot_primary_app
region: flash_primary
size: 0x200
mcuboot_primary:
address: 0xc000
end_address: 0x85000
orig_span: &id001
- app
- mcuboot_pad
region: flash_primary
sharers: 0x1
size: 0x79000
span: *id001
mcuboot_primary_app:
address: 0xc200
end_address: 0x85000
orig_span: &id002
- app
region: flash_primary
size: 0x78e00
span: *id002
mcuboot_secondary:
address: 0x85000
end_address: 0xfe000
placement:
after:
- mcuboot_primary
align:
start: 0x1000
region: flash_primary
share_size:
- mcuboot_primary
size: 0x79000
settings_storage:
address: 0xfe000
end_address: 0x100000
placement:
align:
start: 0x1000
before:
- end
region: flash_primary
size: 0x2000
sram_primary:
address: 0x20000000
end_address: 0x20040000
region: sram_primary
size: 0x40000
and on the overlay file we have
&flash0 {
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
boot_partition: partition@0 {
label = "mcuboot";
reg = <0x000000000 0x0000C000>;
};
slot0_partition: partition@c000 {
label = "image-0";
reg = <0x0000C000 0x00067000>;
};
slot1_partition: partition@73000 {
label = "image-1";
reg = <0x00073000 0x00067000>;
};
scratch_partition: partition@da000 {
label = "image-scratch";
reg = <0x000da000 0x0001e000>;
};
/*
* The flash starting at 0x000f8000 and ending at
* 0x000fffff is reserved for use by the application.
*/
/*
* Storage partition will be used by FCB/LittleFS/NVS
* if enabled.
*/
storage_partition: partition@f8000 {
label = "storage";
reg = <0x000f8000 0x00008000>;
};
};
};
on proj.conf
# Enable mcumgr. CONFIG_MCUMGR=y # Ensure an MCUboot-compatible binary is generated. CONFIG_BOOTLOADER_MCUBOOT=y # Enable FOTA over BLE CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=y CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU_SPEEDUP=y CONFIG_SECURE_BOOT=y CONFIG_IMG_MANAGER=y CONFIG_MCUBOOT_IMG_MANAGER=y CONFIG_IMG_ERASE_PROGRESSIVELY=y # This is enabled only in prodcution, but will limit debugging and breakpoints # CONFIG_DISABLE_FLASH_PATCH=y # already defined in mcuboot.conf # Enable the Bluetooth (unauthenticated) and shell mcumgr transports. CONFIG_BT_SMP=y CONFIG_ZCBOR=y CONFIG_STREAM_FLASH=y CONFIG_MCUMGR_TRANSPORT_BT=y CONFIG_MCUMGR_TRANSPORT_BT_PERM_RW=n CONFIG_MCUMGR_TRANSPORT_BT_CONN_PARAM_CONTROL=y CONFIG_MCUMGR_GRP_IMG=y CONFIG_MCUMGR_GRP_OS=y # Enable MCUmgr Packet Reassembly feature over Bluetooth and its # configuration dependencies. MCUmgr buffer size is optimized to fit one SMP # packet divided into five Bluetooth Write Commands, transmitted with the # maximum possible MTU value: 498 bytes. CONFIG_MCUMGR_TRANSPORT_BT_REASSEMBLY=y CONFIG_MCUMGR_TRANSPORT_NETBUF_SIZE=2475 CONFIG_MCUMGR_GRP_OS_MCUMGR_PARAMS=y # Enable custom SMP request to erase settings partition. CONFIG_MCUMGR_GRP_ZBASIC=n CONFIG_MCUMGR_GRP_ZBASIC_STORAGE_ERASE=y CONFIG_MCUMGR_GRP_OS_ECHO=y CONFIG_MCUMGR_GRP_OS_INFO=y
