Embedded World Nürnberg 2017 Impressions: MCUXpresso, Hexiwear, NTAG, LPC800-DIP and Alan Hawse

This year I managed to attend the Embedded World in Nürnberg/Germany after missing the 2016 show. And 2017 has been a blast! With more than 1000 exhibitors and >30’000 visitors it was huge! There were too many exciting things, so I just pick a few: NXP demonstrated the new MCUXpresso Software and Tools with a new Eclipse Neon based IDE, lots of IoT and Hexiwear, the tiny LPC800-DIP board, and I have met Alan Hawse in person!

Impresson from the Show (embeddedworld 2017)

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Better FreeRTOS Debugging in Eclipse

With debugging FreeRTOS applications in Eclipse, it is a big to have views available showing all the threads, queues, timers and heap memory allocation. One of the best Eclipse plugins are the one NXP provides for FreeRTOS: they are free of charge and give me pretty much everything I need. However, if you are not that familiar with FreeRTOS itself, here are a few tips to get more out of the plugins.

Better FreeRTOS Debugging in Eclipse

Better FreeRTOS Debugging in Eclipse

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Tips for Making Copy of Eclipse CDT Projects Easier

Instead creating a new project from scratch, often it is simpler to copy an existing Eclipse CDT project, then change it and go on.  To copy-past the a project in Eclipse:

  1. Select the project in the Project Explorer View (CTRL-C on Windows)

    Copy of a project

    Copy of a project

  2. Then paste it in the Project Explorer View (CTRL-V on Windows), and I can specify the new name:

    Paste of Project

    Paste of Project

However, to make that process simpler, a few things have to be done right in the ‘source’ project first.

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Cycle Counting on ARM Cortex-M with DWT

Some ARM Cortex-M have a DWT (Data Watchpoint and Trace) unit implemented, and it has a nice feature in that unit which counts the execution cycles. The DWT is usually implemented on most Cortex-M3, M4 and M7 devices, including e.g. the NXP Kinetis or LPC devices.

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NXP MCUXpresso Software and Tools with Clocks Tool

About a year ago, on December 7th 2015, Freescale and NXP have announced the completion of their merger.  Now it is Qualcomm which wants to acquire NXP? It looks like these mergers are happening faster and faster. The reality is that merging products take more time than anticipated, and nearly one year later I can see the outcome of what comes out of the marriage between Freescale and NXP or between Kinetis and LPC: NXP has announced the MCUXpresso software and tools for Kinetis and LPC microcontroller:

Introducing MCUXpresso

Introducing MCUXpresso (Source: NXP video)

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Tutorial: Using Single Wire Output SWO with ARM Cortex-M and Eclipse

As a standard procedure, I add some console functionality to my embedded applications. That way I have a command line interface and can inspect and influence the target system. One interesting hardware feature of ARM Cortex-M is Single Wire Output (SWO): it allows to send out data (e.g. strings) over up to 32 different stimulus ports, over a single wire.

swo-pin-on-arm-debug-header

swo-pin-on-arm-debug-header

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ARM Cortex-M Interrupts and FreeRTOS: Part 3

This is the third part about ARM Cortex-M and how the interrupts are used. In Part 1 I discussed the Cortex-M interrupt system and in Part 2 I showed nested interrupt examples. This part is about FreeRTOS and how it uses the Cortex-M interrupt system.

NXP KV58F ARM Cortex-M7

NXP KV58F ARM Cortex-M7

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ARM Cortex-M, Interrupts and FreeRTOS: Part 2

In “ARM Cortex-M, Interrupts and FreeRTOS: Part 1”  I started with the ARM Cortex-M interrupt system. Because the ARM implementation cann be very confusing, I confused myself and had to fix and extend the description in Part 1 :-). Thank for all the feedback and comments!

Originally I wanted to cover FreeRTOS in Part 2. Based on the questions and discussions in Part 1 I thought it might be a good idea to provide visual examples.

NXP KV58F ARM Cortex-M7

NXP KV58F ARM Cortex-M7

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