MCUXpresso IDE V11.3.0 for 2021

I’m in the middle of the university exam season: means writing exams and do grading. The same time the new semester is approaching too and I need to prepare the new course material. For the classes using NXP parts I’m using the Eclipse based MCUXpresso IDE, and I just received the announcement that a new version V11.3.0 is available: time to check out what is new.

MCUXpresso IDE v11.3.0 (Build 5222)

MCUXpresso IDE v11.3.0 (Build 5222)

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Dark or Light: What is your Preference?

Most of my students seems to prefer the ‘Dark’ desktop and tool theme. So this is getting popular, and I was reluctant to use it. But tools support is getting better (see MCUXpresso IDE) and I switched do the ‘dark’ side for now :-).

But what do you prefer? Not Eclipse in particular, but as a general color theme? Is it the ‘new’ Dark, black, darker-than-dark, … theme?

Dark Theme

Dark Theme

Or is it the ‘classic’ Light, bright, white, … theme?

Light Theme

Light Theme

Please let us know:

Happy undarking 🙂

 

Getting Started with Microsoft Azure RTOS (aka ThreadX)

If you are a regular reader of my articles, you probably know that I’m using FreeRTOS in most of my applications, for obvious reasons. But clearly this is not the only RTOS out there. After Microsoft had acquired Express Logic back in April 2019 things kept quite for a while. To me the crown jewel of Express Logic is the ThreadX RTOS. But recently Microsoft is pushing more and more the ‘Azure Sphere’ and trying to monetize the ‘IoT’ (I apologize for mentioning that overused acronym) application space and providing it now free for devices from selected partners which includes NXP now.

Debugging with ThreadX in MCUXpresso IDE

Debugging with ThreadX in MCUXpresso IDE

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Tweaking MCUXpresso IDE Black Theme

‘Dark’ or ‘Black’ themes are on vogue: some love it, some do not care. The good thing is that we all have a choice. Things are getting improved on the host OS (Windows/Linux) side, but the challenge is still on the application side, but things are getting better. This is true for the Eclipse based IDEs too, with the NXP MCUXpresso IDE V11.2.1 just recently released: it comes with improved Dark Theme support:

Tweaked MCUXpresso IDE Dark Theme

Tweaked MCUXpresso IDE Dark Theme

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NXP LPC55S16-EVK: unboxing and first impressions

Hi, this is Mark from embeddedpro in the United Kingdom and I’m back with more videos and blogs. In the next few weeks there are two new Cortex M33 development boards becoming available. I’ll blog about my first impressions of the boards, and what I’ve been doing with them. I want my blogs give you some tips, hints and ideas about things that you can do: let me know in the Comments below.

Board photograph: LPC55S16-EVK
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Copyright Law for Makers and Educators

Maker spaces and ‘FabLabs’ are popular and accessible in many areas. 3D printers are on the cheap, and powerful laser cutters are in the range of the fearless hobbyist. You can get dirty-cheap PCBs from China in less than a week (ok, probably not right now because of Corona virus) and it is easy to SMD solder parts these days with a DIY SMD PnP machine and OpenPnP. With the right equipment and skill set it is possible to build many cool projects. It is very rewarding and a great learning thing. Blog about it so other can learn too. And it even could get featured on Hackaday.

But: The risk is that someone might send you letter about a ‘Copyright Infringement’. Sadly, this is what happened to me for one of my recent projects. I don’t think that ‘take down’ letter was justified, but I learned a great deal what I should have done differently to avoid that situation. So in the end, it was a learning opportunity, which I believe is worth to share. In essence: what can a maker or educator do?

hackaday building a giant meta-clock made of smaller clocks

Hackaday: building a giant meta-clock made of smaller clocks (image: original image from Hackaday)

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New NXP MCUXpresso Eclipse IDE v11.0

A few days ago NXP has released a new version of their Eclipse IDE flagship: the MCUXpresso IDE v11.0.

NXP MCUXpresso IDE V11.0.0

NXP MCUXpresso IDE V11.0.0

The previous v10.3.1 was released back in Feb 2019, and the 11.0 now in June this year matches up with the Fall university semester. I appreciate that the releases are about every 6 months, so this gives me time to use it in my university lecture material and lab work. I had the weekend for trying it out, and I’m very pleased.

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Reverse Engineering of a Not-so-Secure IoT Device

The ‘Internet of Things’ is coming! It started as an overused marketing hype with no real use case (who needs internet connected fridges? Who wants the internet connected toilet paper?).

New ‘things’ start to pop up, useful or not: From smart bulbs (Philips Hue), thermostats (Nest), smart TV (Samsung and others) up to voice assistants (Alexa, Cortana, Google). You might even have installed one of these, right? What about temperature and humidity sensors? Probably there is nothing wrong with that?

But what would you think if one morning you find a strange unknown device installed under your working desk, connected to the cloud and internet?

IoT Device attached under a working desk

IoT Device attached under a working desk

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Be aware: Floating Point Operations on ARM Cortex-M4F

My mantra is *not* to use any floating point data types in embedded applications, or at least to avoid them whenever possible: for most applications they are not necessary and can be replaced by fixed point operations. Not only floating point operations have numerical problems, they can lead to performance problems as in the following (simplified) example:

#define NOF  64
static uint32_t samples[NOF];
static float Fsamples[NOF];
float fZeroCurrent = 8.0;

static void ProcessSamples(void) {
  int i;

  for (i=0; i < NOF; i++) {
    Fsamples[i] = samples[i]*3.3/4096.0 - fZeroCurrent;
  }
}

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Different Ways of Software Configuration

Most of the time software needs some way to configure things: depending on the settings, the software will do different things. For example the software running on the microcontroller on top of the Raspberry might have the OLED LCD available or not:

Raspberry Pi and tinK22 with OLED LCD

Raspberry Pi and tinyK22 (NXP Kinetis K22FN512) with OLED LCD

How can I deal with this in my application code? Continue reading