![]() Version()=Arduino Bootloader (SAM-BA extended) 2.0 \bossac.exe -d -port=COM5 -o 0x10000 -U -i -e -w 'C:\Users\charl\Mbed Programs\mbed-os-example-blinky\BUILD\ARDUINO_NANO33BLE\ARMC6\mbed-os-example-blinky.bin' -R Set binary mode version()=Arduino Bootloader (SAM-BA extended) 2.0 C:\Users\charl\AppData\Local\Arduino15\packages\arduino\tools\bossac\1.9.1-arduino1>. You need to press twice the reset button on the board to force the bootloader to run forever before starting the upload command. I re-use the bossac binary that is shipped with the arduino IDE and added an option to upload at address 0x10000. You can see it in the logs if you activate the extra logs in the IDE. It took me some time to understand how to do it but hopefuly i got some help here and so i decided to use BOSSAC which is the same tools used by the arduino IDE. ![]() This part is tricky since my original goal is to use the arduino bootloader to upload my code to the board without any other tools. This info is part of the arduino bootlaoder code and was explain to me here: The arduino bootloader will call the code at this address after it boot.Īfter you compile the code with MBED studio you will have the result binary here “C:\Users\charl\Mbed Programs\mbed-os-example-blinky\BUILD\ARDUINO_NANO33BLE\ARMC6” that can be uploaded to the board upload The second change is “”mbed_app_start”: “0x10000″” so that the toolchain know my program will be located in memory at address 0x10000. I added 2 parameters “”OUTPUT_EXT”: “bin”” to generate a bin file instead of an hex file (the uploader use bin files) main() runs in its own thread in the OSĪlso in the folder of your project you should have a /mbed-os/targets/targets.json with the NANO33 definition. I ve done a very simple program that will blink 3 times a LED on pin #include "mbed.h" The only “difficulty” is to use a mbed version recent enough (>=5.14) to have the adruino nano 33 in the list of target. ![]() I used MBED studio to avoid dealing with the setup of a toolchain on windows: Nevertheless my first idea was to keep the arduino bootloader on the board so that I can program it WITHOUT any extra device and benefits from arduino bootloader. That’s why i decided to give a try to program with MBEDos directly instead of Arduino. ” which seems promising especialy since it has a very complet Bluetooth stack Cordio ( ) which include Bluetooth MESH capability ( ) which is not offer today by the Arduino Bluetooth library ( ). That’s when I discover about MBEDOs ” Arm Mbed OS is a free, open-source embedded operating system designed specifically for the “things” in the Internet of Things. This is explain on their blog if you are curious: They went for a smart solution by deciding to run Arduino Core on top of MBED OS to be able to use all the works already done by MBEDOS to integrate the nrf52840 chip. This is the first board based on the Nrf52840 and thus there is no existing Arduino core for this board which means they would face some challenge to have Arduino running on it. ![]() Arduino release several new boards including the Nano 33 BLE which pick my interest due to the fact that it is based on the Nrf52480 chip ( ) which should be compatible with Bluetoot MESH.
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