d0b8554df4
The nrf52840-mdk-usb-dongle and pca10050 comes with a pre-flashed bootloader (OpenBootloader). This commit updates the boards "mpconfigboard.mk" to use DFU as default flashing method and set the corresponding BOOTLOADER settings such that nrf52840_open_bootloader_1.2.x.ld linker script is used. The default DFU flashing method can be disabled by issuing "DFU=0" when invoking make. This will lead to "segger" being used as default flashing tool. When using "DFU=0", the linker scripts will not compensate for any MBR and Bootloader region being present, and might overwrite them if they were present. The commit also removes the custom linker script specific to nrf52840-mdk-usb-dongle as it now points to a generic. Updated nrf52840-mdk-usb-dongle's README.md to be more clear on how to deploy the built firmware. The port README.md has also been updated. In the list of target boards a new column has been added to indicate which bootloader is present on the target board. And for consistency, changed all examples in the README.md to use "deploy" instead of "flash". |
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| mpconfigboard.h | ||
| mpconfigboard.mk | ||
| pins.csv | ||
| README.md | ||
nRF52840 MDK USB Dongle
The nRF52840 MDK USB Dongle is a small, low-cost development board in a USB dongle form-factor powered by an nRF52840 with 1MB flash and 256KB RAM.
This device is pre-installed with Open Bootloader, allowing DFU upgrades over USB using Nordic nRF Connect or nrfutil. To support Open Bootloader, the flash and memory layout must be adjusted slightly (details here) from the typical nRF build; this board definition ensure the appropriate build configuration is used for MicroPython.
Pinout
The pinout diagram provides an overview of the available pins and their capabilities. All pins are available in MicroPython, using the pin numbers labelled in the diagram (excluding the leading port number, P0).
The three LEDs are available either through the usual Pin mechanism - pins
22-24 - or by board.LED(n) where n can be 1, 2 or 3.
Build instructions
Follow the standard nRF Port build instructions; but use
nrf52840-mdk-usb-dongle as the value for BOARD:
make BOARD=nrf52840-mdk-usb-dongle
The build artifacts will be created in build-nrf52840-mdk-usb-dongle. Once
built, the target can be deployed to the device as described in
nRFUtil targets.
An alternative way to deploy to the device, is to open firmware.hex using
nRF Connect and select Write. Detailed instructions can be found on the
developer
wiki.