Installing Processor Expert into MCUXpresso IDE

With the new MCUXpresso versions out, and because it has been a while I showed how to install Processor Expert into Eclipse, here is an update how to do this.

Processor Expert in MCUXpresso IDE
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GNU Coverage (gcov) with NXP S32 Design Studio IDE

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.

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Recovering bricked LPC55Sxx EVK Boards

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 :-(.

bricked board with set of debut probes

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.

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Debugging with Dynamic Printf Breakpoints

I’m not a big fan of using printf() in embedded applications, but I have to admit that in some cases it is very useful. One problem in debugging embedded systems debugging is getting values or information off the target: because of the limited resources this can be very challenging.

So why not doing this with the debugger in an automated way? And here dynamic printf breakpoints can help: it adds printf()-style output on-the-fly to your program without the need to recompile or restart your program, without the need to run printf() on the target:

Using Dynamic Printf Breakpoint
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Silicon Shortage and Semihosting with NXP MCUXpresso SDK on FRDM-KE02Z

The silicon shortage is still going on. While the NXP Kinetis KE devices might not be my first choice, they still seem to be available, in at least in lower quantities. This has been recognized by others, as I’m getting more and more questions and requests for the KE and KV family. This is why I un-dusted my old FRDM-KE02Z to be used with the latest MCUXpresso SDK and IDE.

FRDM-KE02Z Board

And in case you want to use that board or device with semihosting, I have you covered.

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MCUXpresso IDE 11.5.0

I’m now in the middle of the university fall semester exam season with writing exams and grading student work, and the same time the new semester courses need to be prepared. With the global silicon and board shortage, this will be again a challenge to equip all the labs with the needed infrastructure. The good thing is that there is no shortage on software and tools side of the infrastructure: NXP released last week their new flagship Eclipse based IDE: the MCUXpresso IDE 11.5.0. Time to check it out for the upcoming lectures and classes….

NXP MCUXpresso IDE Version 11.5.0

Spoiler Alert: It has a new view for FreeRTOS lovers, plus new features for energy/power measurements!

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DIY Split-Flap Display

Split-flap displays are electromechanical display devices, which were common in airports or railway stations a few years ago.Unfortunately, most of them are gone and replaced by LED displays. Why not create a DIY version of it?

2×10 Split-Flap Display
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Spilling the Beans: storage class and linkage in C, including static locals

In Spilling the Beans: C/C++ Header Files, I touched on interfaces and the difference between external and internal linkage. This article has a focus on internal linkage with using the static keyword in C.

Photo by Markus Spiske on Pexels.com

So this might be a programming language refresher, in case you are clear about the difference between declaration and definition, or if you are wondering about internal or external linkage in C.

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LoRaWAN with NXP LPC55S16 and ARM Cortex-M33

LoRaWAN is getting more an more popular, both for terrestrial and increasingly with low-orbit satellite systems. The ‘Long Range’ in ‘LoRa’ makes it an ideal solution for low-power and low data rate applications. For a university research project we selected the Semtech SX1261/62 transceiver together with the NXP LPC55S16 mikrocontroller. Because the board used for that project is not available for the public (yet), I share here how you can run the LoRaWAN stack with the NXP LPC55S16-EVK.

LoRaWAN with Semtech SX126x and NXP LPC55S16
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McuOnEclipse Components: 26-Dec-2021 Release

I’m pleased to announce a new release of the McuOnEclipse components, available on SourceForge. This release includes several bug fixes, support for more devices, and updated components like FreeRTOS, MinINI, Percepio Tracealyzer and SEGGER SystemView.

SourceForge

SourceForge

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