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files-needed-by-factory.md

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How to generate files needed by the factory

These files are needed by the Pine64 factory to flash InfiniTime as the default firmware on the PineTimes.

Two files are needed: an HEX (.hex) file that contains the content of the internal flash memory (bootloader + InfiniTime) and a binary (.bin) file that contains the content of the external flash memory (recovery firmware).

merged-internal.hex

First, convert the bootloader to hex:

<ARM TOOLCHAIN>/bin/arm-none-eabi-objcopy -I binary -O ihex ./bootloader.bin ./bootloader.hex

where bootloader.bin is the last stable version of the bootloader.

Then, convert the MCUBoot image of InfiniTime:

<ARM TOOLCHAIN>/bin/arm-none-eabi-objcopy -I binary -O ihex --change-addresses 0x8000 ./pinetime-mcuboot-app-image-1.6.0.bin ./pinetime-mcuboot-app-image-1.6.0.hex

where pinetime-mcuboot-app-image-1.6.0.bin is the bin of the last MCUBoot image of InfiniTime.

Pay attention to the parameter --change-addresses 0x8000. It's needed to ensure the image will be flashed at the offset expected by the bootloader (0x8000).

Finally, merge them together with mergehex:

/opt/mergehex/mergehex -m ./bootloader.hex ./pinetime-mcuboot-app-image-1.6.0.hex  -o merged-internal.hex

This file must be flashed at offset 0x00 of the internal memory of the NRF52832.

spinor.bin

This file is the MCUBoot image of the last stable version of the recovery firmware. It must be flashed at offset 0x00 of the external SPINOR flash memory.