Embedded Systems & IoT
Technical content covering embedded C, microcontroller programming, board bring-up, device drivers, RTOS concepts, IoT protocols, firmware debugging, and hardware–software integration. A practical guide for embedded engineers building real-world, resource-constrained systems.
The STM32U5A5 features a Cortex-M33 core enhancing secure boot capabilities with TrustZone technology. It ensures secure memory attribution and controlled transitions from Non-secure to Secure environments. Using Option Bytes, it enforces security settings. The device performs secure image verification through ECDSA, maintaining a strong Root of Trust to protect boot processes.
This blog outlines the development of a cloud-connected sensor node using the STMicroelectronics B-U585I-IOT02A Discovery Kit. The project combines a custom bootloader in C with Rust firmware for data acquisition and cloud integration via AWS IoT Core, providing a comprehensive engineering guide from hardware setup to data visualization.
Understanding the memory layout of a C++ program is crucial for systems programmers. It includes regions such as program code, initialized data, the heap, stack, and free space, each with distinct functions. The stack, operating on a LIFO principle, manages function calls and local variables but has limited size, which can lead to overflow.
STM32CubeMX is a graphical tool by STMicroelectronics for STM32 microcontroller projects, streamlining setup and code generation. The installation process on Ubuntu 22.04 can face Java runtime issues, particularly requiring Java 21 for version 6.17.0. Creating a symbolic link to Java 21 resolves installation errors, ensuring successful setup.
Choosing an appropriate C++ container impacts memory layout, cache efficiency, and access patterns, vital for performance. Common comparisons include std::vector, std::deque, std::array, std::list, std::map, and std::unordered_map. The choice should align with data access and modification requirements, ensuring optimal performance for diverse workloads, from iteration to key-based access.
Upgrade your STM32MP1's WiFi driver effortlessly with this comprehensive guide. Learn how to replace the outdated driver with an updated NXP version using Buildroot. Discover step-by-step instructions for obtaining the NXP WiFi driver source code, configuring it for your target, and integrating it into Buildroot. With clear explanations and helpful tips, this blog post simplifies the process, ensuring smooth implementation. Get ready to enjoy improved performance with your newly compiled NXP WiFi kernel module!
Recently, I found myself working with a cellular USB dongle on an embedded Linux system. I've previously documented my experience integrating an LTE device, the…
Continue reading → Setting Up Data Connection with SORACOM Onyx LTE USB Modem on Linux
Recently I have started playing around a bit with Windows PCs. I needed to add a Microsoft KM-Loopback adapter on a Virtual Windows 10 Enterprise.…
Continue reading → How to add Microsoft KM Loopback adapter in Windows 10
Handling large file git git. Git LFS is for supporting large files which are bigger than Git's recommended 50MB file size. You cannot push these files to your repository unless you have installed Git-LFS. This post describes the steps involved how to install Git-LFS on a Windows 10 machine.
virtualenv creates a virtual python environment inside a project folder of your choice. This enables your to install python packages within the virtual python environment without even having any admin rights on that particular machine. This makes the environment extremely flexible for developers.
Unlock seamless connectivity with our comprehensive guide to setting up your FONA module on the SPRESENSE using the Arduino FONA library. This blog post dives into troubleshooting tips for when your serial prompt stalls at “#updater,” a common sign that your firmware needs an update. Whether you're a seasoned developer or a maker just starting out, follow our step-by-step instructions to flash, update, and optimise your setup for reliable performance and enhanced project success.
In one of the previous posts I have described Bringing up Rasberry Pi 3 with NOOBS. But after I brought up the Raspberry Pi (ver…
Continue reading → How to replace the Kernel image in NOOBS with your custom Kernel
Bring up Raspberry Pi To bring up your Raspberry Pi (my Pi is version 3 B) please follow the below link: How to bring up…
Continue reading → Integrating LTE Device EM7565 into Raspberry Pi 3
Formatting a Micro SD Card with FAT32 Using gparted on Ubuntu Preparing a clean SD card for NOOBS using gparted on Ubuntu Linux Vivek Bhadra…
Continue reading → Format a micro SD card using gparted utility
How to bring up a Raspberry Pi version 3 B hardware with NOOBS (Raspbian).
Encountering 'Unknown Symbol' errors while loading the GobiSerial module on Raspberry Pi? This in-depth guide walks you through debugging missing kernel symbols, manually loading required modules, and properly configuring dependencies using depmod and modprobe for a clean and persistent fix. Learn how to resolve LTE driver issues with Sierra Wireless EM7565 on RPi effortlessly!
The article outlines the process of cross-compiling a kernel driver for Raspberry Pi 3 on Ubuntu. It details steps including determining the correct kernel version, downloading the necessary toolchain, compiling the driver, and resolving issues related to module format errors. Ultimately, it demonstrates successfully loading the GobiNet driver on the Raspberry Pi.
I was recently working with something which required me to build a code base and flash it into the board (hw) and then once that…
Continue reading → How to pipe one bash command output to another within a python script
If you are working with nuttx kernel you might have issues trying to bring up the kernel menuconfig with the below command: [code language="bash"] make…
Continue reading → nuttx kernel make menuconfig error in Ubuntu
I had written a blog on how to integrate a custom driver into Linux kernel tree previously here. Integrating a custom driver in nuttx kernel is pretty similar. But writing this down would probably be a good idea for any future reference.
Git log [code language="bash"] git log --pretty=format:"%h%x09%an%x09%ad%x09%s" [/code] Adding it to the bash script [code language="bash"] echo "alias gitl='git log --pretty=format:"%h%x09%an%x09%ad%x09%s"'" >> ~/.bashrc source ~/.bashrc…
Stop Ubuntu going into suspended mode Disable suspend $ sudo systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target Created symlink /etc/systemd/system/sleep.target → /dev/null. Created symlink /etc/systemd/system/suspend.target →…
Continue reading → General Linux developer’s tips and tricks
Install the arduino IDE 1. https://www.arduino.cc/en/Main/Software/ 2. Select Linux 64 bit 3. Click Just Download Unzip the downloaded file as below: vbhadra@jupiter:~/Downloads$ tar -xf arduino-1.8.10-linux64.tar.xz…
A Clean Git Workflow: Private Branches, Squash, and Rebase How to stay in sync with mainline without merge noise, and push clean single commits for…