upload new image via serial uart in mcuboot

[sixuanlu&sky]

hardware board : 52840dk_52840

sdk : ncs1.7.1

IDE: Visual Studio Code

in our OTA design , we have new image download and stored in a LTE module, since our application is a bit large ,which may be more than 512K bytes ,so we want to upload new image file via serial uart from LTE module in mcu bootloader.

1# what other configurations we need do set mcuboot using serial to upload new image in mcuboot? apart from CONFIG_MCUBOOT_SERIAL

2#which api in mcuboot use to write a new packet of image data in to flash area?

3#which api in mcuboot use to decode a new packet of image data ?

4#which api in mcuboot use to validate security feature of the new image file, signed or NOT?

5#which api in mcuboot use to jump to application

[Håkon Alseth]

Hi,

 

Here's a thread on this matter, with an example project on how to enable the serial recovery:

https://devzone.nordicsemi.com/f/nordic-q-a/80870/fota-update-for-nrf9160-device-via-uart

 

For multi-image slots (dual banked), you can have a look at the smp_svr example:

https://docs.zephyrproject.org/2.6.0/samples/subsys/mgmt/mcumgr/smp_svr/README.html#building-the-sample-application

 

1# what other configurations we need do set mcuboot using serial to upload new image in mcuboot? apart from CONFIG_MCUBOOT_SERIAL

technically not much, you should configure the pin you want to assert to enter recovery via "CONFIG_BOOT_SERIAL_DETECT_PIN".

2#which api in mcuboot use to write a new packet of image data in to flash area?

3#which api in mcuboot use to decode a new packet of image data ?

4#which api in mcuboot use to validate security feature of the new image file, signed or NOT?

5#which api in mcuboot use to jump to application

You are asking very specific questions related to how mcuboot works under-the-hood, and most of this info can be read in the mcuboot documentation and running the example(s) to get familiar with mcuboot:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/mcuboot/design.html

 

Kind regards,

Håkon