In many cases I prefer wood as material: it has a warm feeling and with its texture it makes things unique and special. For some time I was thinking about creating a wooden case for eyeglasses as a gift. And here is a first version of it:Continue reading
You might never heard about ROM Libraries, and you are probably not alone. Some might thing that this refers to the boot ROM modern MCUs have built in, which is kinda close. But the thing here is about to build your own (possibly constant) ROM library, program it to your device of choice, and then use it from the application running on the device.
So the concept is to have a (fixed, stable) part with code and data on your device, which can be used by a (possibly changing) application: Think about a stable LoRaWAN network stack in the ROM, with a changing application using it: Would that not be cool?
This not only adds flexibility, but as well allows smaller updates, as only a part of the program has to be changed or updated.
The question is: how to create and use such a ROM Library with the normal GNU build tools?Continue reading
Sometimes it is needed or desired just to add or link a piece of data or BLOB (Binary Large OBject) to the application. For example I have created a .bin file of my code and constant data, and I need to add it to an application using the linker file. How to do this?Continue reading
Modern MCUs like the NXP Kinetis have security features which prevent reverse engineering, but can ‘brick’ devices too. Depending on the settings, it prevents read-out from the FLASH or reprogramming the device. While some of the protection is (mostly) not by-passable by design, in many case the devices looks like ‘bricked’ but still can be recovered. In this article I’ll get you some ways for a (hopefully) successful recovery.Continue reading
Did you know that modern (dish) washing machines have the ability to automatically dispense detergents? The positive side is: this can reduce the amount of detergents used. The machine will monitor the washing process, and ‘cleaner’ dishes should require less detergents.
Our new energy Miele Dishwasher came with that exact feature: the Miele AutoDos System, an automatic detergent dispensing system. The detergent is inside a rotating disk, dispensing detergents as needed, making it (hopefully) more environment-friendly:
The downside is: Miele did not make it refillable: after around 20 washing cycles, you have to replace the disk with a new one. This is not environment friendly. So I wanted to change this….Continue reading
The NXP MCU-Link Pro debug probe includes a LPC804 as an additional microcontroller on the board, including its debug header.
The question is: how to debug the on-board extra LPC804 microcontroller with an external debug probe?Continue reading
Just before the long Easter break, NXP has released an update of the MCUXpresso IDE, the version 11.5.1.Continue reading
The open-source GNU tools provide a rich set of tools to help developing software. Some are clearly more for the high-end application development. But many of the tools are applicable for the more restricted embedded software development process as well. One is gcov, or the GNU Coverage Tool. Coverage is essential for the testing phase, as it tells you what part of code have been used and ‘covered’. This article describes how GNU coverage can be added the NXP S32 Design Studio IDE.Continue reading
While developing applications, it can happen that things go wrong. And in my case I ended up with two LPC55Sxx EVK boards on my desk, which seemed not to be usable any more. The issue: the boards were not accessible with the debug probe, because right after main they muxed the pins in a wrong way :-(.
The standard GDB debug connections (both on-board and off-board) were not able to regain access of the board, because the MCU was running into the fault condition pretty much right out of reset.
Luckily, after a lot of trial-and-error, I have found a way to recover them.Continue reading