Nicla reset before download firmware

stephane · July 4, 2024, 3:20pm

Hello,

I want to download nicla firmware without using IDE.

IDE use dfu-utils. OK for this and parameters.

But IDE send a command to reset board before start dfu-utils.

What is it ?
Where I can find this command ?

Thanks
stéphane

kwagyeman · July 4, 2024, 5:05pm

Here: qt-creator/src/plugins/openmv/openmvpluginio.cpp at b1c459d83fb4c5bbccaf0bf1294dd04cedc0c8f7 · openmv/qt-creator (github.com)

We send a special command to our firmware which resets the board and causes it to enter the bootloader.

Follow the IDE code to decode how this works.

stephane · July 5, 2024, 7:53am

great !
thanks, I will test it

iabdalkader · July 9, 2024, 1:02pm

The whole protocol is implemented in Python here:

github.com

openmv/openmv/blob/master/tools/pyopenmv.py

#!/usr/bin/env python2
# This file is part of the OpenMV project.
#
# Copyright (c) 2013-2021 Ibrahim Abdelkader <iabdalkader@openmv.io>
# Copyright (c) 2013-2021 Kwabena W. Agyeman <kwagyeman@openmv.io>
#
# This work is licensed under the MIT license, see the file LICENSE for details.
#
# Openmv module.

import struct
import sys,time
import serial
import platform
import numpy as np
from PIL import Image

__serial = None
__FB_HDR_SIZE   =12

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It’s just a single file so easier to read and understand than the C++/IDE implementation.

There’s also an example using that with pygame to capture and display the framebuffer:

github.com

openmv/openmv/blob/master/tools/pyopenmv_fb.py

#!/usr/bin/env python2
# This file is part of the OpenMV project.
#
# Copyright (c) 2013-2021 Ibrahim Abdelkader <iabdalkader@openmv.io>
# Copyright (c) 2013-2021 Kwabena W. Agyeman <kwagyeman@openmv.io>
#
# This work is licensed under the MIT license, see the file LICENSE for details.
#
# An example script using pyopenmv to grab the framebuffer.

import sys
import numpy as np
import pygame
import pyopenmv
from time import sleep

script = """
# Hello World Example
#
# Welcome to the OpenMV IDE! Click on the green run arrow button below to run the script!

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Nicla reset before download firmware

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