MCUboot and Zephyr on NXP i.MX RT series

[DerekSnell]

I am sharing these lab guide steps written in 2021 to help users working with MCUboot and Zephyr. These are the steps we used on MIMXRT1060-EVK with Zephyr v2.6.0:

west build -b mimxrt1060_evk -d build-mcuboot bootloader/mcuboot/boot/zephyr

west flash -d build-mcuboot

west build -b mimxrt1060_evk -d build-smp-svr-v0 zephyr/samples/subsys/mgmt/mcumgr/smp_svr/ -- -DOVERLAY_CONFIG='overlay-shell.conf' -DCONFIG_MCUBOOT_SIGNATURE_KEY_FILE="bootloader/mcuboot/root-rsa-2048.pem"

west flash -d build-smp-svr-v0

Use mcumgr tool to manage new firmware update through UART:

mcumgr conn add COMPORT type="serial" connstring="dev=COM17,baud=115200,mtu=512"

mcumgr -c COMPORT image list

The serial terminal will return details like this about the SMP application in MCUboot Slot0:

Images:
image=0 slot=0
version: 0.0.0
bootable: true
flags: active confirmed
hash: 74167b9373435a7a92de33143fbecd888a5b88a23adcc894840e66c2e649023f
Split status: N/A (0)

The previous steps flashed v0.0.0 of the SMP app in Slot0. The steps below use mcumgr to update with v1.0.0:

west build -b mimxrt1060_evk -d build-smp-svr-v1 zephyr/samples/subsys/mgmt/mcumgr/smp_svr/ -- -DOVERLAY_CONFIG='overlay-shell.conf' -DCONFIG_MCUBOOT_SIGNATURE_KEY_FILE="bootloader/mcuboot/root-rsa-2048.pem" -DCONFIG_MCUBOOT_EXTRA_IMGTOOL_ARGS="--version=1.0.0"

mcumgr -c COMPORT image upload -e build-smp-svr-v1/zephyr/zephyr.signed.bin

mcumgr -c COMPORT image list

Serial Terminal prints results like this:

Images:
image=0 slot=0
version: 0.0.0
bootable: true
flags: active confirmed
hash: 74167b9373435a7a92de33143fbecd888a5b88a23adcc894840e66c2e649023f
image=0 slot=1
version: 1.0.0
bootable: true
flags:
hash: 869fb41491c3262405fcd34626c1a33800d08498642ced5ac693a53f1b15cddb
Split status: N/A (0)

mcumgr -c COMPORT image test 869fb41491c3262405fcd34626c1a33800d08498642ced5ac693a53f1b15cddb

mcumgr -c COMPORT image confirm 869fb41491c3262405fcd34626c1a33800d08498642ced5ac693a53f1b15cddb

[vishnusudhan]

Hi @DerekSnell

I tried the above steps for RT1160 EVK platform,
I could able to flash the MCUBoot & smp-svr-v0 application & able to get output as below,

After that i try to upload image through mcumgr tool,

1. Added mcumgr conn add COMPORT type="serial" connstring="dev=COM17,baud=115200,mtu=512"
2. Isssed command "mcumgr -c COMPORT image list" , I am getting error as ERROR: NMP Timeout.

I have seen Unable to upload firmware over serial with mcumgr #9509 this thread. Based on that i try to increase the timeout till 20 sec & also try to enable the UART option in the application and getting error as below,

Suggest is there any steps i am missing out/ need to config the mcuboot/ application to rectify the time out issue?

[jamesshawver1]

I know this is on a dead thread, but for anyone else that experiences errors like the one seen here - the issue based upon the image is most likely a device tree issue. It doesn't appear that the uart module has the "chosen" keyword for "uart_mcumgr". I don't remember the exact syntaxy here and zephyr does weird stuff with converting between spaces and commmas and whatnot to underscores - so, I'd guess that there needs to be something like chosen="zephyr,uart_mcumgr" in the device tree within the uart node to get past this compilation error.

[DerekSnell]

Thanks @jamesshawver1 for pointing that out.
Specifically using the MIMXRT1060-EVK devicetree as an example, it has this chosen node:

	chosen {
		zephyr,uart-mcumgr = &lpuart1;
	};

[JPHutchins]

If you are looking for an alternative to the deprecated mcumgr, we have validated the MIMXRT1060-EVK USB and UDP transports for use with smpclient and maintain HW regression tests here: https://github.com/intercreate/smpclient/tree/main/examples/duts. I expect that the raw UART would work nicely as well!

[DerekSnell]

Marking this example as answered