Category Archives: ARM

McuOnEclipse Components: 08-Nov-2015 Release

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Time is flying fast, time for another McuOnEclipse components release on SourceForge with the following main changes and features:

  1. New component for Segger RTT makes adding a console communication interface super easy (and fast!)
  2. RTT support for the command line Shell component
  3. RTT component used for Percepio FreeRTOS Tracing
  4. Updated USB component, support for USB CDC blocking/waiting and endpoint configuration
  5. Updated FreeRTOS to V8.2.3, memory heap selection improved and setting for time slicing
  6. RingBuffer implements a Delete() method
  7. Extended Kinetis SDK support in components, added by default
Segger RTT Console

Segger RTT Console

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Kinetis Drone: Remote Controller with SUMD

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The bad news: my ESC (see “Kinetis Drone: Graupner ESC S3055 Failure“) for my Kinetis drone is still not repaired :-(. Anyway, I have plenty of other things to make for my drone project. One is to work on the remote controller:

Test Setup

Test Setup

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Tutorial: lwip with FreeRTOS and the Freescale FRDM-K64F Board

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This tutorial is about how to create a lwIP project with FreeRTOS using the Kinetis SDK V1.3.0 with Kinetis Design Studio on the Freescale FRDM-K64F board.

FRDM-K64F Board with lwIP running

FRDM-K64F Board with lwIP running

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Overview: Processor Expert

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In “Overview: From Snippets to Code Generation” I discussed several tools used in my development process. On tool which helps me a lot to get things done is Processor Expert. In this post I’ll give an overview about this tool and reasoning for the pros and cons of using it.

Processor Expert

Processor Expert

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McuOnEclipse Components: 17-Oct-2015 Release

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On SourceForge I have published an update of the McuOnEclipse software components, with following major changes:

  1. FreeRTOS updated to version V8.2.2 which comes with TLS (Thread Local Storage) support and GDB debug helpers.
  2. Percepio Trace updated to V3.0.2 with the release of Segger Real Time Terminal (RTT) for continuous trace streaming.
  3. FSL_USB_Stack with alternate USB initialization to deal with an issue in combination with the Kinetis SDK v1.3.0
  4. GenericI2C and GenericSWI2C have added support for custom I2C bus handling.

    McuOnEclipse SourceForge Release 2015-10-17

    McuOnEclipse SourceForge Release 2015-10-17

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NVIC: Disabling Interrupts on ARM Cortex-M and the Need for a Memory Barrier Instruction

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Mastering interrupts is critical to make an embedded application reentrant. The challenge with reentrancy is that things might be implemented in a wrong way and the issue might just show up sporadically (see “EnterCritical() and ExitCritical(): Why Things are Failing Badly“). The ARM Cortex interrupt controller is named NVIC (Nested Vectored Interrupt Controller).

ARM Cortex NVIC Registers

ARM Cortex NVIC Registers

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Zumo Robots at Maker Faire in Rome (16. – 18. Oct. 2015)

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I won’t be able to attend the Maker Faire in Rome (16. – 18. Oct. 2015). But five of the Sumo bots students from the previous semesters have built and programmed will be there.

Sumo Robots

Sumo Robots

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