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| .. | ||
| confirm_main.c | ||
| Kconfig | ||
| Make.defs | ||
| Makefile | ||
| README.md | ||
| set_img_main.c | ||
| version_main.c | ||
Examples / MCUboot / swap_test
Description
MCUboot Swap Image is an application to demostrate firmware upgrade using internal flash memory. It simulate MCUboot API steps to switch between two valid images.
This application add 3 Builtin Apps to NuttX NSH: version, set_img and confirm.
After application is build and nuttx.bin be generated, the binary must be
signed. Consult your board README file to get instructions how to do it.
How to build and flash
First step is build your board configuraton using mcuboot-loader as target.
That create the bootloader itself. The nuttx.bin must be flash as usual.
After that, clean up environment and set mcuboot-swap-test as target. The
build output will generate the nuttx.bin file. You should execute the MCUboot
script called imgtool.py and sign the binary file two times.
The first time you will use --version 1.0.0 and signedv1.bin as output file.
Then, the second sign you need change to --version 2.0.0 and signedv2.bin
as output file.
The signedv1.bin file must be at MCUboot Slot-0 partition and signedv2.bin
at Slot-1.
More instructions about how to sign and flash can be found at board README file.
Running swap image test
Open you terminal and reboot your board. You can see a similar output as below.
You can check builtin apps using command ?.
*** Booting MCUboot build 7c890f4b075aed73e4c825ccf875b2fb9ebf2ded ***
NuttShell (NSH) NuttX-10.2.0
nsh> ?
help usage: help [-v] [<cmd>]
. cd echo hexdump mv rmdir true xd
[ cp exec kill printf set truncate
? cmp exit ls ps sleep uname
basename dirname false mkdir pwd source umount
break dd free mkrd reboot test unset
cat df help mount rm time usleep
Builtin Apps:
mcuboot_set_img mcuboot_confirm sh
mcuboot_version ramtest nsh
nsh>
First step (check version):
nsh> mcuboot_version
Image version 1.0.0.0
nsh>
Second step (mark image as good because it is running). This is an optional
step that must be executed if you ran imgtool.py without optional parameter
--confirm.
nsh> mcuboot_confirm
Application Image successfully confirmed!
nsh>
Third step (let's reboot and see whats happen):
nsh> reboot
*** Booting MCUboot build 7c890f4b075aed73e4c825ccf875b2fb9ebf2ded ***
NuttShell (NSH) NuttX-10.2.0
nsh> mcuboot_version
Image version 1.0.0.0
nsh>
Fourth step (let's switch image):
nsh> mcuboot_set_img
Requested update for next boot. Restarting...
*** Booting MCUboot build 7c890f4b075aed73e4c825ccf875b2fb9ebf2ded ***
NuttShell (NSH) NuttX-10.2.0
nsh> mcuboot_version
Image version 2.0.0.0
nsh>
Now, we switched from image version 1.0.0 to image 2.0.0. However, we intentionaly
will not run mcuboot_confirm app.
nsh> reboot
*** Booting MCUboot build 7c890f4b075aed73e4c825ccf875b2fb9ebf2ded ***
NuttShell (NSH) NuttX-10.2.0
nsh> mcuboot_version
Image version 1.0.0.0
nsh>
This means that if for any reason App reboot, have a malfunctioning or not boot,
MCUboot will switch back to old good image! Remember that we executed
mcuboot_confirm at step two.
Fifth step (switch to image version 2 and mark as permanent):
nsh> mcuboot_set_img
Requested update for next boot. Restarting...
*** Booting MCUboot build 7c890f4b075aed73e4c825ccf875b2fb9ebf2ded ***
NuttShell (NSH) NuttX-10.2.0
nsh> mcuboot_confirm
Application Image successfully confirmed!
nsh> mcuboot_version
Image version 2.0.0.0
nsh>
Sixth step (Reboot and confirm V2 image):
nsh> reboot
*** Booting MCUboot build 7c890f4b075aed73e4c825ccf875b2fb9ebf2ded ***
NuttShell (NSH) NuttX-10.2.0
nsh> mcuboot_version
Image version 2.0.0.0
nsh>
Conclusion, once we boot a newer image and confirm it MCUboot always run that image, unless you instruct it to swap again!