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add some build description.

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hathach 2018-05-08 22:25:15 +07:00
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README.md
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# Adafruit nRF52840 Bootloader
This repository contains the USB bootloader for Adafruit nRF52840 boards (1MB flash, 256KB SRAM).
This repository depend on the [tinyusb](https://github.com/hathach/tinyusb/tree/develop) as submodule, after cloing this repo you need to run this command
git submodule update --init
## Build with makefile
Navigate to `src/singlebank` (recommended) or `src/dualbank` (work in progress), and use feather52840 target for building bootloader.
make feather52840
To flash bootloader + S140
make flash_feather52840
To only flash S140
make flash_sd
## Build using Segger Embeded Studio
For better debugging you can also use SES, The project file is located at `src/segger/nrf52840_bootloader.emProject`. Note: the SES only flash the bootloader when you click download, you need to flash Softdevice beforehand if you haven't done so ( use `make flash_sd` mentioned above )