This tool can generate an OTA image in the |OTA standard header|TLV1|...|TLVn| format. The payload contains data in standard TLV format (not Matter TLV format). During OTA transfer, these TLV can span across multiple BDX blocks, thus the OTAImageProcessorImpl instance should take this into account.
For details related to the OTA implementation, please see OTA README.
k32w0k32w1mcxw71This is a wrapper over standard ota_image_tool.py, so the options for create are also available here:
python3 ./scripts/tools/nxp/ota/ota_image_tool.py create -v 0xDEAD -p 0xBEEF -vn 50000 -vs "1.0" -da sha256
followed by custom options- and a positional argument (should be last) that specifies the output file. Please see the create_ota_images.sh for some reference commands.
The list of custom options:
| option | description |
|---|---|
--app-input-file | Path to the application binary |
--app-version | Application version. Can differ from -vn |
--app-version-str | Application version string. Same as above |
--app-build-date | Application build date. Same as above |
--bl-input-file | Path to the SSBL binary |
--bl-version | SSBL version |
--bl-version-str | SSBL version string |
--bl-build-date | SSBL build date |
--factory-data | Enable the generation of factory data |
--cert_declaration | Matter Certification Declaration |
--dac_cert | Matter DAC certificate |
--dac_key | Matter DAC private key |
--pai_cert | Matter PAI certificate |
--json | Path to a JSON file following ota_payload.schema |
Please note that the options above are separated into four categories: application, bootloader, factory data and custom TLV (--json option). If no descriptor options are specified for app/SSBL, the script will use the default values (50000, "50000-default", "2023-01-01"). The descriptor feature is optional, TLV processors having the option to register a callback for descriptor processing.
When defining a custom processor, a user is able to also specify the custom format of the TLV by creating a JSON file based on the ota_payload.schema. The tool offers support for describing multiple TLV in the same JSON file. Please see the examples/ota_max_entries_example.json for a multi-app + SSBL example. Option --json must be used to specify the path to the JSON file.
A set of examples can be found in ./examples. Please run create_ota_image.sh to generate the examples:
ota_max_entries_example.json. The examples uses 8 SSBL binaries because they have a small size and fit in external flash.The binaries from ./examples/binaries should only be used only as an example. The user should provide their own binaries when generating the OTA image.