Author: Jan

alStream

A MCU like STM32F405 have multiple serial devices and though their hardware is very different they perform the same job of sending/receiving ino. alStream is a base class for all components with a serial stream interface like USB, UART, CAN, SPI, I2C and even UDP/Ethernet. The objective is to provide a uniform messaging service where…

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easyIPC SW Stack

This is the same as is on my previous entry, but I focus on easyIPC and Plain. easyIPC is a lot of modules to communicate with the rest of the system and while we easily can add user modules in C++, we can also add them in Plain. Plain is compiled code running in a…

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BasicPI Firmware Stack

This illustrates the BasicPI Firmware Stack in progress. What I always do in embedded applications is to make a “standard” main.cpp as follows: void AppInit() {    // wire hardware } int main() {    AppInit();    // start OS } A team I worked in years ago agreed on this standard so we should…

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XPortHub Rev 1.2 Annotated

  CAN CAN RS485 RS485 Terminal switch for CAN & RS485 USB Micro SD Card SPI Flash RTC Battery Power connector I2C SPI TTL UART RS232 RS232 Raspberry PI Connector STM32F405RG SWD Connector Changes from Rev 1.0 1 Corrected wrong SPI Flash package 2 Added resistors to SPI 1 to support Half-Duplex SPI 3 Replaced…

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Sensor IO Hat Annotated

This is a 3D of my Sensor IO Hat Rev 1.0 that allow interfacing to 8 x Analogue/Digital sensors, 3 x I2C and 3 x SPI. STM32F405 have 16 x 12 bit ADC channels and each AD port have 2 IO pins that can be used . The Sensor IO Hat is about connecting to…

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Linux Ethernet Switch/Router Hat

The most obvious Hat to use HLK-7688A on is a Ethernet Switch or Router with SPI backbone support. I have ordered a dev unit so I can test out this possibility. The Ethernet switch part is very straight forward, I also see a very decent SPI, but I need to dig a bit more into…

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The Age of Linux

Linux started seeing a serious increased usage in embedded projects with raspberry PI due to it’s availability and low cost. And the last years have provided a large number of low cost embedded Linux solutions. They are getting smaller, more powerfully and decreasing in cost making them very attractive in projects. Raspberry PI might still…

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STCubeIDE Review 2

I have struggled a little to find an IDE I was OK with, but finally settled with STCubeIDE or Eclipse as it actually is. This is IMO one of the smarter moves that ST have done to support their MCU’s. The editor is “ok”, it compiles, download allow you to debug multiple targets + I…

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DSO150 Oscilloscope Annotated

DSO150 is very easy to use and operate like a multi-meter, and this caught my attention because the other Oscilloscopes I havve needs to be set up. DSO150 is basically only to switch on and use like a Multi-meter – you instantly see the signal and it was surprisingly easy to operate the HMI. I…

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DSO150 – 20$ Oscilloscope

This Oscilloscope took me by surprise. I ordered it mostly for fun, but it turns out to be very functional and easy to operate Scope in a multi-meter format. 200Khz actually cover a lot of the activities I do and by attaching a battery you get a very handy, single channel Oscilloscope in a handy…

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