2020-05-24 16:36:04 +02:00
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# Bootloader
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## Bootloader binary
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The binary comes from https://github.com/lupyuen/pinetime-rust-mynewt/releases/tag/v4.1.7
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It must be flash at address **0x00** in the internal flash memory.
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Using OpenOCD:
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`
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program mynewt_nosemi.elf_4.1.7.bin 0
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`
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## Application firmware image
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Build the binary compatible with the booloader:
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`
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make pinetime-mcuboot-app
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`
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The binary is located in *<build directory>/src/pinetime-mcuboot-app.bin*.
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It must me converted into a MCUBoot image using *imgtool.py* from [MCUBoot](https://github.com/JuulLabs-OSS/mcuboot/tree/master/scripts).
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`
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imgtool.py create --align 4 --version 1.0.0 --header-size 32 --slot-size 475136 --pad-header <build directory>/src/pinetime-mcuboot-app.bin image.bin
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`
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The image must be then flashed at address **0x8000** in the internal flash memory.
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Using OpenOCD:
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`
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program image.bin 0x8000
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`
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## OTA and DFU
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Pack the image into a .zip file for the NRF DFU protocol:
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`
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adafruit-nrfutil dfu genpkg --dev-type 0x0052 --application image.bin dfu.zip
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`
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2020-06-01 15:21:58 +02:00
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Use NRFConnect or dfu.py (in <project root>/bootloader/ota-dfu-python) to upload the zip file to the device:
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2020-05-24 16:36:04 +02:00
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`
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sudo dfu.py -z /home/jf/nrf52/bootloader/dfu.zip -a <pinetime MAC address> --legacy
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`
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2020-06-01 15:21:58 +02:00
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**Note** : dfu.py is a slightly modified version of [this repo](https://github.com/daniel-thompson/ota-dfu-python).
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