48 lines
1.7 KiB
Markdown
48 lines
1.7 KiB
Markdown
# Adafruit nRF52840 Bootloader
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This repository contains the USB bootloader for Adafruit nRF52840 boards (1MB flash, 256KB SRAM).
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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
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git submodule update --init
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## Option 1: Build with makefile
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Navigate to `src/singlebank` (recommended) or `src/dualbank` (work in progress), and use feather52840 target for building bootloader.
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make feather52840
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To flash bootloader + S140
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make flash_feather52840
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To only flash S140
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make flash_sd
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### Common makefile problems
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#### 1. `arm-none-eabi-gcc`: No such file or directory
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If you get the following error:
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```
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$ make feather52840
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Compiling file: dfu_single_bank.c
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/bin/sh: /usr/bin/arm-none-eabi-gcc: No such file or directory
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make: *** [_build/dfu_single_bank.o] Error 127
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```
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You make need to edit the `Makefile` (for example `src/singlebank/Makefile`),
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and update the `GNU_INSTALL_ROOT` to point to the root path of your GCC ARM
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toolchain.
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#### 2. `mergehex: No such file or directory`
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Make sure that `mergehex` is available from the command-line. This binary is
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part of of Nordic's [nRF5x Command Line Tools](http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.tools%2Fdita%2Ftools%2Fnrf5x_command_line_tools%2Fnrf5x_installation.html).
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## Option 2: Build using Segger Embeded Studio
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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 )
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